2. About Ken-Betwa Link Project

• It is the first project under the National Perspective Plan for the interlinking of rivers.
• It envisages transferring water from the Ken river to the Betwa river, both tributaries of the Yamuna.
• The Ken-Betwa Link Canal will be 221 km long, including a 2 km long tunnel.
• The project has two phases with mainly four components.
• Phase-I will involve one of the components Daudhan Dam complex and is subsidiary units such as Low-Level Tunnel, High-Level Tunnel, Ken-Betwa Link Canal, and powerhouses.
• Phase II will involve three components Lower Orr Dam, Bina Complex Project, and Kotha Barrage.

• As per an official statement issued after the Cabinet approval on Wednesday, the total cost of the Ken-Betwa link project has been assessed at Rs.44,605 crores at 2020-21 price levels.
• The Union Cabinet has approved central support of Rs.39,317 crores for the project, covering a grant of Rs.36,290 crores and a loan of Rs.3,027 crores.
• The statement further said that the project is proposed to be implemented in 8 years with “state-of-the-art technology.

3. Special Purpose Vehicle (SPV)

• A Special Purpose Vehicle (SPV) for the project is called Ken-Betwa Link Project Authority (KBLPA) will be set up to implement the project.
• The Centre has set in motion the process of creating the National Interlinking of Rivers Authority (NIRA) is an independent autonomous body for planning, investigation, financing, and implementation of the interlinking of river (ILR) projects in the country.
• The NIRA will have the power to set up SPV for individual link projects.

4. Conceptualiztion of the project

• The idea of linking Ken with Betwa got a major push in August 2005, when a tripartite memorandum of understanding for the preparation of a detailed project report (DPR) was signed between the Centre and the two states.
• In 2008, the Centre declared KBLP a National Project. Later, it was included as part of the Prime Minister’s package for the development of the drought-prone Bundelkhand region.
• In April 2009, it was decided that the DPR will be prepared in two phases.
• In 2018, a comprehensive DPR including phase-I, II, and additional areas proposed by Madhya Pradesh was also prepared.
• It was sent to Uttar Pradesh, Madhya Pradesh, and the Central Water Commission in October 2018.
• The memorandum of agreement was signed to implement the project.

5. Benefits from Project

• The project lies in Bundelkhand, a drought-prone region, which spreads across 13 districts of Uttar Pradesh and Madhya Pradesh.

• It will pave the way for more interlinking of river projects to ensure that scarcity of water does not become an inhibitor for development in the country.

Image source: The Indian Express

• According to the National Water Development Agency under the Jal Shakti Ministry, the Daudhan dam, to be built on the Ken river, will be 77 meters high and its gross capacity will be 2,853 million cubic meters.
• According to the NWDA, the reservoir of Daudhan dam will involve “a submergence of 9000 ha area, out of which 5803 ha comes under Panna Tiger Reserve.
• The latter includes 4141 ha of forest area which is about 7.6% of the total Panna Tiger Reserve area”.
• To mitigate adverse impacts on Panna Tiger Reserve, as decided by NTCA,
• Landscape Management Plan to decide mitigation strategy concerning KenBetwa Link entrusted to Wildlife Institute of India, Dehradun, and is in its final stage.
• In addition to above three wildlife sanctuaries, viz Nauradehi, Rani Durgawati of MP and Ranipur WLF of UP are planned to be integrated with PTR for the proper conservation of Wild Life under Tiger Reserve.

7. The concept of river linking in India

• In the past, several river-linking projects have been taken up.
• For instance, the Periyar Project, under which the transfer of water from the Periyar basin to the Vaigai basin was envisaged, was commissioned in 1895.
• Other projects such as Parambikulam Aliyar, Kurnool Cudappah Canal, Telugu Ganga Project, and Ravi-Beas-Sutlej too were undertaken.
• In the 1970s, the idea of transferring surplus water from a river to a water-deficit area was mooted by the then Union Irrigation Minister Dr. K L Rao.
• Himself an engineer, he suggested the construction of a National Water Grid for transferring water from water-rich areas to water-deficit areas.
• Later, Captain Dinshaw J Dastoor proposed a Garland Canal to redistribute the water from one area to another.
• However, the government did not pursue these two ideas further.
• It was not until August 1980 that the Ministry of Irrigation prepared a National Perspective Plan for water resources development envisaging interbasin water transfer.
• The NPP comprised two components: Himalayan Rivers Development; and Peninsular Rivers Development. Based on the NPP, the National Water Development Agency (NWDA) identified 30 river links 16 under the Peninsular component and 14 under the Himalayan Component.
• Later, the river-linking idea was revived during the Atal Bihari Vajpayee regime.
• The Ken-Betwa Link Project is one of the 16 projects under the peninsular component.

8. Clearances for a river-linking project

1. Forest clearance, and environmental clearance (Ministry of Environment & Forests);
2. Resettlement and rehabilitation plan of tribal population (Ministry of Tribal Affairs) and
3. Wildlife clearance (Central Empowered Committee).

For Prelims & Mains

INDIA-AUSTRALIA RELATIONSHIP

 

 

1.Context

 

Signalling a significant deepening of bilateral ties, India and Australia on Thursday sealed a series of pacts across sectors, from defence and maritime security to energy, including one that paves the way to operationalise their 2014 Civil Nuclear Agreement that secures a stable corridor for uranium supplies to India for peaceful purposes.

 

2.Historical Background

• The India-Australia bilateral relationship has been underpinned by the shared values of pluralistic, Westminster-style democracies, Commonwealth traditions, expanding economic engagement, and increasing high-level interaction
• Several common traits, including strong, vibrant, secular, and multicultural democracies, a free press, an independent judicial system, and English language, serve as the foundation for closer co-operation and multifaceted interaction between the two countries
• The end of the Cold War and beginning of India’s economic reforms in 1991 provided the impetus for the development of closer ties between the two nations.
• The ever-increasing numbers of Indian students travelling to Australia for higher education, and the growing tourism and sporting links, have played a significant role in strengthening bilateral relations
• With the passage of time, ties evolved in the direction of a strategic relationship, alongside the existing economic engagement
• In recent years, the relationship has charted a new trajectory of transformational growth
• With greater convergence of views on issues such as international terrorism, and a shared commitment to a rules-based order in the Indo-Pacific region, the two democracies have taken their cooperation to plurilateral formats, including the Quad (with the United States and Japan).

3. Strategic ties

• In September 2014, Australia’s Prime Minister Tony Abbott visited India, and in November that year, Modi became the first Indian Prime Minister to make an official visit to Australia after Rajiv Gandhi in 1986
• He also became the first Indian PM to address a joint sitting of the Parliament of Australia
• At the India-Australia Leaders’ Virtual Summit in June 2020, Modi and Prime Minister Scott Morrison elevated the bilateral relationship from the Strategic Partnership concluded in 2009 to a Comprehensive Strategic Partnership (CSP)
• At the 2nd India-Australia Virtual Summit in March 2022, several key announcements were made, including on a Letter of Intent on Migration and Mobility Partnership Arrangement to foster the exchange of skills, and a Letter of Arrangement for Educational Qualifications Recognition to facilitate the mobility of students and professionals
• There has been a series of high-level engagements and exchange of ministerial visits in 2022 and in 2023

4. Cooperation between two Countries

4.1. Cooperation

The Economic Cooperation Trade Agreement (ECTA): the first free trade agreement signed by India with a developed country in a decade entered into force in December 2022, and has resulted in an immediate reduction of duty to zero on 96% of Indian exports to Australia in value (that is 98% of the tariff lines) and zero duty on 85% of Australia’s exports (in value) to India

Bilateral trade was US$ 27.5 billion in 2021; with ECTA, there is potential for it to reach around US$ 50 billion in five years

4.2.People to People ties

India is one of the top sources of skilled immigrants to Australia

As per the 2021 Census, around 9.76 lakh people in Australia reported their ancestry as Indian origin, making them the second largest group of overseas-born residents in Australia

To celebrate India@75, the Australian government illuminated more than 40 buildings across the country, and Prime Minister Albanese issued a personal video message

4.3. Education

The Mechanism for Mutual Recognition of Educational Qualifications (MREQ) was signed on March 2 this year

This will facilitate mobility of students between India and Australia

Deakin University and University of Wollongong are planning to open campuses in India

More than 1 lakh Indian students are pursuing higher education degrees in Australian universities, making Indian students the second largest cohort of foreign students in Australia

4.4. Defence Cooperation

The 2+2 Ministerial Dialogue was held in September 2021, and the Deputy Prime Minister and Defence Minister of Australia visited in June 2022.

The Mutual Logistics Support Agreement (MLSA) was concluded during the Virtual Summit in June 2020, and the two militaries held several joint exercises in 2022

Australia will host military operations with India, Japan, and the US in the “Malabar” exercises off the coast of Perth in August, and has invited India to join the Talisman Sabre exercises later this year

4.5. Clean Energy

The countries signed a Letter of Intent on New and Renewable Energy in February 2022 which provides for cooperation towards bringing down the cost of renewable energy technologies, especially ultra low-cost solar and clean hydrogen

During the Virtual Summit in March 2022, India announced matching funds of AUD 10 million for Pacific Island Countries under Infrastructure for Resilient Island States (IRIS) and of AUD 10 million for Pacific Island Countries under International Solar Alliance (ISA)

 

5.China Factor

Ties between Australia and China were strained after Canberra in 2018 banned Chinese telecom firm Huawei from the 5G network

Later, it called for an inquiry into the origins of Covid-19, and slammed China’s human rights record in Xinjiang and Hong Kong

China responded by imposing trade barriers on Australian exports, and by cutting off all ministerial contact

India has been facing an aggressive Chinese military along the border. New Delhi and Canberra have been assessing the Chinese challenge since 2013

6.What is Economic Cooperation Trade Agreement

• It is the first Free Trade Agreement (FTA) that India has signed with a major developed country in over a decade.
• The Agreement encompasses cooperation across the entire gamut of bilateral economic and commercial relations between the two friendly countries, and covers areas like:
  • Trade in Goods, Rules of Origin
  • Trade in Services
  • Technical Barriers to Trade (TBT)
  • Sanitary and Phytosanitary (SPS) measures
  • Dispute Settlement, Movement of Natural Persons
  • Telecom, Customs Procedures
  • Pharmaceutical products, and Cooperation in other Areas

• The India-Australia Economic and Cooperation Trade Agreement (Ind-Aus ECTA ), which is expected to double trade between the two countries to $50 billion, came into effect.
• The Ind-Aus ECTA provides an institutional mechanism to encourage and improve trade between the two countries
•  It covers almost all the tariff lines dealt by India and Australia
• India will benefit from preferential market access provided by Australia on 100% of its tariff lines, including all the labor-intensive sectors of export interest to India, such as Gems and Jewellery, Textiles, leather, footwear, furniture among other
• On the other hand, India will be offering preferential access to Australia on over 70% of its tariff lines, including lines of export interest to Australia, which are primarily raw materials and intermediaries such as coal, mineral ores and wines
• Products like agricultural products and the dairy sector - which were very sensitive for India and without which Australia has never done an agreement before - have been protected
• It is estimated that an additional 10 lakh jobs would be created in India under ECTA

 

Previous Year Questions : 1.Consider the following countries: (2018 UPSC)  Australia Canada China India Japan USA Which of the above are among the ‘free-trade partners’ of ASEAN? (a) 1, 2, 4 and 5 (b) 3, 4, 5 and 6 (c) 1, 3, 4 and 5  (d) 2, 3, 4 and 6 Ans: (c)

 

 

 

Source:indianexpress

 

 

PRAMBANAN TEMPLE

 

1. Context

 

Prime Minister Narendra Modi, during his official visit to Indonesia, visited the 9th-century Prambanan Temple Complex in Yogyakarta along with Indonesian President Prabowo Subianto. The two leaders inaugurated a joint conservation initiative for the UNESCO World Heritage Site, which will be undertaken by the Archaeological Survey of India (ASI).

 

 

2. Prambanan Temple: An Architectural Jewel of Southeast Asia

 

 

• The Prambanan Temple is the largest Hindu temple complex in Indonesia and one of the finest examples of Hindu architecture in Southeast Asia.
• Located in the Special Region of Yogyakarta on the island of Java, the temple stands as a remarkable reminder of the spread of Indian culture, religion, art and architecture beyond the Indian subcontinent through peaceful trade, cultural exchanges and maritime interactions.
• Built during the ninth century CE, Prambanan represents the golden age of the Hindu Mataram Kingdom.
• The temple complex was constructed primarily under the patronage of the Sanjaya Dynasty, whose rulers were devoted followers of Hinduism, particularly Shaivism.
• Although Indonesia is today the world's largest Muslim-majority country, Prambanan serves as an enduring symbol of the country's rich multicultural and religious history.
• The temple complex was designed as a grand sacred city consisting of nearly 240 temples, making it one of the largest temple complexes ever constructed in Southeast Asia.
• At the centre of the complex rises the majestic temple dedicated to Lord Shiva, surrounded by temples dedicated to Lord Vishnu and Lord Brahma, collectively representing the Hindu Trimurti.
• This arrangement reflects the Hindu philosophical understanding of creation, preservation and destruction as complementary cosmic functions.

 

 

3. Historical Background of Prambanan Temple

 

 

• The construction of Prambanan began around 850 CE during the reign of King Rakai Pikatan of the Sanjaya Dynasty. The temple symbolised the political resurgence of Hindu rule in Central Java after a period of Buddhist dominance under the Sailendra rulers.
• By constructing such a monumental temple complex, the Sanjaya kings sought to establish both their political legitimacy and religious devotion.
• However, Prambanan's prosperity did not last indefinitely. During the tenth century, political power gradually shifted from Central Java to East Java, leading to the abandonment of the temple complex.
• Frequent volcanic eruptions, earthquakes and the passage of time caused significant structural damage, and much of the temple remained buried beneath volcanic debris for centuries.
• The temple was rediscovered during the nineteenth century under Dutch colonial administration, after which systematic archaeological restoration began. Even today, restoration work continues due to the enormous scale of the complex and the recurring seismic activity affecting the region

 

4. UNESCO World Heritage Status

 

• Recognising its exceptional historical, artistic and architectural significance, UNESCO inscribed the Prambanan Temple Complex as a World Heritage Site in 1991.
• The temple represents one of humanity's greatest architectural achievements and serves as an outstanding example of Hindu religious architecture outside the Indian subcontinent.
• UNESCO recognised the monument for its monumental scale, remarkable stone carvings, sophisticated urban planning and its testimony to the cultural interactions between South Asia and Southeast Asia.
• Despite centuries of earthquakes and volcanic eruptions, Prambanan continues to preserve much of its original grandeur and remains one of Indonesia's most visited cultural landmarks.
• The recent conservation initiative led jointly by Indonesia and India's Archaeological Survey of India further strengthens global efforts to preserve this invaluable cultural treasure for future generations.

 

5. Architectural Style of Prambanan Temple

 

 

• The Prambanan Temple represents the finest expression of Classical Central Javanese Hindu architecture. While strongly inspired by Indian religious ideas and temple planning principles, its architecture evolved into a distinctly Indonesian style adapted to local geography, construction techniques and artistic traditions.
• The temple complex follows the Mandala concept, an important principle in Hindu cosmology that symbolises the universe.
• The temples are arranged in concentric square courtyards, with the holiest shrines occupying the innermost section.
• This spatial arrangement reflects the Hindu belief in moving progressively from the material world towards spiritual enlightenment.
• One of the most striking features of Prambanan is its soaring vertical towers. Unlike many Indian temples, whose towers often appear broader or pyramidal, Prambanan's towers are remarkably slender and rise sharply into the sky.
• These towering structures symbolise Mount Meru, the mythical mountain believed in Hindu cosmology to be the abode of the gods.
• The tallest temple, dedicated to Lord Shiva, rises approximately 47 metres above the ground, making it the dominant feature of the entire complex.
• Surrounding the three principal temples are smaller shrines dedicated to the divine vehicles of the Hindu gods—Nandi for Shiva, Garuda for Vishnu and Hamsa for Brahma

 

 

6. Architectural Features of the Temple

 

 

• Prambanan demonstrates extraordinary engineering skills and artistic excellence. The temples were constructed using locally available volcanic andesite stone, carefully cut and assembled without the extensive use of mortar.
• The precision of stone fitting reflects the advanced engineering capabilities of the builders.
• The walls of the temples are adorned with intricate relief sculptures depicting episodes from the Ramayana and other Hindu scriptures.
• These carvings narrate the adventures of Lord Rama, Sita, Hanuman and Ravana with remarkable artistic detail.
• Interestingly, although the stories originate in India, many of the figures are portrayed with local Javanese artistic characteristics, illustrating how Indian religious narratives were creatively adapted into Southeast Asian culture.
• The temple also features elaborate carvings of celestial beings, floral motifs, mythical creatures and divine guardians, all of which contribute to its rich decorative programme.

 

7. The Sanjaya Dynasty

 

 

• The Sanjaya Dynasty played a crucial role in shaping the religious and cultural history of ancient Java. Emerging during the eighth century CE, the dynasty established the Hindu Mataram Kingdom and became one of the most influential ruling houses in Southeast Asia.
• The rulers of the Sanjaya Dynasty were ardent followers of Hinduism, especially Shaivism, and actively patronised the construction of monumental temples. Their reign witnessed the flourishing of Sanskrit language, Hindu philosophy, literature, sculpture and temple architecture.
• One remarkable aspect of the Sanjaya period was the peaceful coexistence of Hindu and Buddhist kingdoms.
• Although the Sanjaya rulers promoted Hinduism, they maintained cordial relations with the neighbouring Buddhist Sailendra Dynasty, which was responsible for constructing the famous Borobudur Temple.
• This coexistence reflects the religious tolerance that characterised much of ancient Southeast Asian civilisation.
• The construction of Prambanan became the greatest architectural achievement of the Sanjaya rulers and continues to stand as a symbol of their cultural and political legacy.

 

8. Prambanan and India's Civilisational Links with Indonesia

 

 

• The significance of Prambanan extends far beyond its architectural beauty. The temple embodies centuries of cultural interaction between India and Southeast Asia.
• From the early centuries of the Common Era, Indian traders, scholars, priests and artisans travelled across the Bay of Bengal, carrying with them religious ideas, Sanskrit literature, artistic traditions and systems of governance.
• These influences were gradually assimilated by local societies without military conquest or political domination.
• The spread of Hinduism and Buddhism contributed to the emergence of Indianised kingdoms across Southeast Asia, including those in present-day Indonesia, Cambodia, Thailand and Vietnam.
• The Ramayana and Mahabharata became deeply embedded in local traditions, while Sanskrit vocabulary entered regional languages. Even today, Indonesian culture retains numerous references to these ancient civilisational connections.
• The joint conservation project led by the Archaeological Survey of India therefore carries symbolic significance beyond heritage preservation.
• It represents India's commitment to strengthening cultural diplomacy under its Act East Policy and reaffirms the shared historical legacy between India and Indonesia.
• Such initiatives also enhance cooperation in archaeology, tourism, education and cultural exchanges while reinforcing India's image as a responsible stakeholder in preserving global heritage

 

 

9. Way Forward

 

The Prambanan Temple is much more than an ancient Hindu monument; it is a living testament to the enduring civilisational dialogue between India and Southeast Asia. Its magnificent architecture, historical significance and artistic excellence illustrate how Indian religious and cultural traditions travelled across the seas and were creatively adapted by local societies. At the same time, the temple highlights the importance of cultural exchange, religious tolerance and shared heritage in shaping the history of Asia.

 

For Prelims: Current events of national and international importance.   For Mains: General Studies I: Art& Culture General Studies II: Bilateral, regional and global groupings and agreements involving India and/or affecting India’s interests.

 

Source: Indianexpress

 

 

 

ETHANOL BLENDING

 

1. Context

In the mid-1970s, faced with surging oil import bills and an imploding global sugar market, Brazil made a bold bet: it would run its cars on alcohol. Half a century later, this Brazilian push to ramp up ethanol use in its auto fuel mix is now a masterclass in biofuel adoption. 

 

2. Ethanol

• Ethanol, also known as ethyl alcohol, is a type of alcohol commonly used as a biofuel and a key ingredient in alcoholic beverages.
• It is a clear, colorless liquid with a characteristic odor and a slightly sweet taste.
• Ethanol has a wide range of applications and is produced through the fermentation of sugars by yeast or other microorganisms.

3. Ethanol Blending

• Ethanol blending refers to the practice of mixing ethanol with gasoline or other fuels to create a blended fuel.
• Ethanol is a biofuel derived from renewable sources such as sugarcane, corn, or other plant materials.
• It is commonly used as an additive to gasoline in various parts of the world to reduce greenhouse gas emissions and promote cleaner fuel options.
• In the context of transportation, the most common form of ethanol blending is with gasoline, creating a blend known as ethanol-gasoline blend or gasohol.
• The most common ethanol-gasoline blends are E10 and E15, indicating the percentage of ethanol in the mixture. For example, E10 contains 10% ethanol and 90% gasoline, while E15 contains 15% ethanol and 85% gasoline.

 

4. What does 100% blending mean?

• 100% blending refers to the use of pure ethanol as fuel. Compared to ethanol, petrol has a higher energy density, meaning one litre of petrol can deliver nearly 45–55% more energy than the same quantity of ethanol.

• Most conventional petrol engines are designed and approved only for E20 fuel, which contains 20% ethanol blending. Older vehicles generally support even lower ethanol content.
• In contrast, fuels such as E85 or E100 require flex-fuel engines that are specifically engineered to operate with varying ethanol concentrations.
• At present, flex-fuel vehicles are not commonly available in India. Toyota has launched a flex-fuel version of the Toyota Innova Hycross, priced around ₹3–4 lakh higher than its petrol counterpart.
• Maruti Suzuki and Hyundai are also reportedly developing prototype models. These vehicles require specialised features such as corrosion-resistant fuel systems, advanced sensors, and finely calibrated engine control units to handle higher ethanol blends efficiently

5. Benefits of Ethanol Blending

• Ethanol is considered a renewable fuel because it is derived from plant materials that absorb carbon dioxide during their growth. When blended with gasoline, ethanol can help reduce the carbon footprint of transportation fuels, as it emits fewer greenhouse gases compared to pure gasoline.
• By blending ethanol with gasoline, countries can reduce their reliance on imported fossil fuels and promote energy security.
• Ethanol has a higher octane rating than gasoline, which can improve engine performance and increase fuel efficiency.
• Ethanol production often relies on agricultural feedstocks, providing economic benefits to farmers and rural communities.
• Ethanol-gasoline blends can help reduce harmful pollutants such as carbon monoxide and volatile organic compounds, contributing to improved air quality.
• Mixing 20 percent ethanol in petrol can potentially reduce the auto fuel import bill by a yearly $4 billion, or Rs 30,000 crore. 
• Another major benefit of ethanol blending is the extra income it gives to farmers. Ethanol is derived from sugarcane and also foodgrains. Hence, farmers can earn extra income by selling their surplus produce to ethanol blend manufacturers.

6. What is E20 Fuel?

• E20 fuel is a type of blended fuel that contains 20% ethanol and 80% gasoline.
• It is an ethanol-gasoline blend, similar to other common blends like E10 (10% ethanol) and E15 (15% ethanol).
• The percentage of ethanol in the blend is denoted by the "E" followed by the percentage of ethanol content.
• E20 fuel is considered a higher ethanol blend compared to E10 and E15, which are more widely available in various countries.
• The use of E20 is part of efforts to promote renewable fuels and reduce greenhouse gas emissions from the transportation sector.

 

7. India and Ethanol Blending

• In India, ethanol is primarily manufactured using sugarcane, which is known to consume large quantities of water.
• Excessive diversion of sugarcane for ethanol production may affect sugar supply, thereby influencing food prices and availability.
• To address this concern, the government has been encouraging the production of second-generation ethanol derived from agricultural waste such as rice straw and other crop residues. This approach is also expected to help reduce stubble burning by farmers.

• However, producing ethanol is still not cheaper than manufacturing petrol, making government support and regulated pricing necessary. There are also environmental and economic concerns associated with ethanol production.
• Although ethanol releases lower levels of carbon monoxide and particulate pollutants during combustion compared to petrol, sugarcane-based ethanol production involves significant land usage, high water consumption, and dependence on agricultural inputs such as fertilizers
• India has been attempting to strengthen its energy security by diversifying its energy sources. This includes exploring alternative crude oil suppliers, securing additional uranium resources, and promoting renewable energy through various incentives.
• Some efforts to access global energy resources have faced challenges due to sanctions imposed by the United States.
• At the same time, domestic manufacturing capabilities in the energy sector remain limited, and attempts to significantly boost indigenous oil and gas production have achieved only modest success.
• According to Nitin Gadkari, India must eventually reduce hydrogen production costs to nearly $1 per kilogram if it aims to emerge as an energy-exporting nation. Currently, global hydrogen production costs range between $3 and $6 per kilogram.
• The National Green Hydrogen Mission has been launched with this objective in mind. Nevertheless, the hydrogen sector still faces major obstacles, particularly the absence of commercially viable systems for hydrogen transport and storage

 

8. Significance of E20 fuel

• Reduced Greenhouse Gas Emissions: Ethanol is derived from renewable plant sources, and blending it with gasoline can help reduce the carbon footprint of transportation fuels, contributing to efforts to combat climate change.
• Energy Security: By using more domestically produced ethanol, countries can reduce their dependence on imported fossil fuels and enhance energy security.
• Improved Engine Performance: Ethanol's higher octane rating can enhance engine performance and increase fuel efficiency in certain vehicles.
• Support for Agriculture: Ethanol production often relies on agricultural feedstocks, supporting farmers and rural economies.

9. Challenges in Ethanol Blending Programme

While ethanol blending in transportation fuels offers various benefits, there are several challenges that countries may face in implementing and sustaining a successful ethanol blending program. Some of these challenges include:

• Infrastructure and Distribution: Establishing the necessary infrastructure for blending and distributing ethanol-gasoline blends can be a significant challenge. This includes ensuring that fuel stations have the proper storage facilities and compatible pumps to dispense blended fuels.
• Compatibility with Vehicles: Not all vehicles are designed to run on high ethanol blends like E20 or E85. Older vehicles or vehicles from certain manufacturers may not be compatible with these blends, leading to potential engine damage or decreased performance.
• Fuel Quality and Standards: Maintaining consistent fuel quality is essential to prevent engine damage and ensure consumer confidence. Governments and fuel suppliers must adhere to strict quality standards and monitor the blending process to avoid issues with fuel performance.
• Feedstock Availability and Cost: The production of ethanol relies on agricultural feedstocks, such as corn, sugarcane, or other biomass. The availability and cost of these feedstocks can vary, affecting the overall cost of ethanol production and blending.
• Land Use and Food Security Concerns: Utilizing agricultural land for ethanol production can raise concerns about competing with food production and potentially impacting food security in some regions.
• Competing Uses for Ethanol: Ethanol has various applications beyond fuel blending, such as in the production of alcoholic beverages, pharmaceuticals, and industrial chemicals. Competing uses can influence the availability and cost of ethanol for blending.

10. National Biofuel Policy

• India has a National Policy on Biofuels, which was first introduced in 2009 and later revised in 2018.  The policy aims to promote the use of biofuels to reduce the country's dependence on fossil fuels, enhance energy security, promote sustainable development, and mitigate greenhouse gas emissions.
• The policy encourages the blending of biofuels with conventional fossil fuels to create biofuel blends. It focuses on the production and utilization of first-generation biofuels like ethanol and biodiesel, as well as advanced biofuels made from non-food feedstock.
• The policy sets targets for blending biofuels with conventional fuels in the transportation sector. For instance, the policy aimed for a 20% ethanol blending in petrol and a 5% biodiesel blending in diesel by 2030.
• The policy emphasizes the development and promotion of second-generation biofuels, which are produced from non-food feedstock, such as agricultural residues, waste, and non-edible oils. This helps avoid competition with food crops and ensures sustainability.
• The policy supports research and development initiatives in the biofuels sector, aimed at improving production processes, enhancing feedstock availability, and developing cost-effective technologies for biofuel production.
• The policy focuses on creating a robust supply chain for biofuels, from feedstock cultivation and collection to biofuel production, distribution, and marketing. This helps in ensuring a smooth and efficient supply of biofuels across the country.

11. Can ethanol be used as an aviation fuel?

 

• The aviation sector remains one of the most difficult industries to decarbonise because large commercial aircraft currently cannot rely on batteries or hydrogen technology at scale.
• As a result, Sustainable Aviation Fuel (SAF) is considered one of the main solutions for meeting global emission reduction targets in aviation.
• For ethanol to be suitable for aircraft engines, it must undergo a specialised conversion process known as alcohol-to-jet (ATJ).
• During this process, ethanol is dehydrated, its hydrocarbon chains are extended, and it is further treated through hydrogenation.
• This conversion ensures that pure ethanol is not directly used in jet engines, thereby avoiding problems such as reduced engine performance or moisture absorption that could block fuel systems.
• The final ATJ fuel closely resembles conventional kerosene in its chemical composition, allowing it to be used with existing aviation fuel infrastructure.
• ASTM International, which establishes international aviation fuel standards, has approved the ATJ production pathway and currently permits blending of up to 50% ATJ-based fuel in Sustainable Aviation Fuel.
• However, expanding ethanol use for both SAF production and road transport blending could place additional strain on the availability of raw feedstock materials used for ethanol manufacturing

For Prelims: Ethanol Blending, E20 fuel, Greenhouse Gas Emission, National Policy on Biofuels, Food Security, and Gasoline. For Mains: 1. Discuss the benefits and challenges of ethanol blending in transportation fuels as a strategy to reduce greenhouse gas emissions and promote renewable energy sources. (250 Words).

 

Previous year Question 1. According to India's National Policy on Biofuels, which of the following can be used as raw materials for the production of biofuels? (UPSC 2020) 1. Cassava 2. Damaged wheat grains 3. Groundnut seeds 4. Horse gram 5. Rotten potatoes 6. Sugar beet Select the correct answer using the code given below: A. 1, 2, 5, and 6 only B. 1, 3, 4, and 6 only C. 2, 3, 4, and 5 only D. 1, 2, 3, 4, 5 and 6 Answer: A

Source: The Indian Express

 

 

 

MADDEN-JULIAN OSCILLATION

 

 

 

 

1. Context

 

After remaining largely inactive for more than a week, the monsoon finally picked some strength and momentum beginning Monday. Maharashtra, for instance, received its first good rainfall of the season on Tuesday.

 

 

2. What is the Madden-Julian oscillation?

 

• The Madden–Julian Oscillation (MJO) is one of the most important atmospheric phenomena in the tropical region of the Earth. It is a large-scale pattern of atmospheric circulation characterized by alternating periods of enhanced and suppressed rainfall that travels eastward around the equator.
• Unlike cyclones, which are localized weather systems, or seasonal climate phenomena such as the El Niño–Southern Oscillation (ENSO), the MJO is an atmospheric disturbance that continuously moves across the tropical oceans, influencing weather conditions over vast geographical areas.
• The phenomenon was first identified in 1971 by meteorologists Roland Madden and Paul Julian, after whom it is named. Their research showed that tropical rainfall and atmospheric pressure exhibit a recurring pattern that moves eastward around the globe over a period of about one to two months.
• The MJO originates most frequently over the tropical Indian Ocean, where warm ocean waters provide the energy necessary for the development of deep convection.
• The system then moves eastward across the maritime continent, including Indonesia, into the tropical Pacific Ocean and, on some occasions, continues into the Atlantic Ocean before gradually weakening. The entire cycle generally takes between 30 and 60 days, although it may sometimes extend to nearly 90 days.
• The MJO consists of two distinct phases: the active (enhanced) phase and the suppressed phase. During the active phase, warm, moist air rises from the Earth's surface, leading to the formation of extensive cloud cover, heavy rainfall, and intense thunderstorm activity.
• This upward movement of air releases large amounts of latent heat, strengthening atmospheric circulation. In contrast, the suppressed phase is characterized by sinking air, which inhibits cloud formation and results in clear skies, reduced rainfall, and relatively dry weather conditions.
• As the MJO moves eastward, these two phases travel together, causing alternating wet and dry periods in tropical regions.
• One of the reasons the MJO is scientifically important is that it serves as a bridge between short-term weather events and long-term climate variability.
• While ordinary weather systems usually last for only a few days, and climate phenomena like ENSO persist for several months or even years, the MJO operates on an intra-seasonal timescale, making it highly valuable for forecasting weather several weeks in advance.
• The MJO has a profound influence on the Indian monsoon. When its active phase is located over the tropical Indian Ocean and surrounding regions, convection increases significantly, leading to enhanced monsoon rainfall over India.
• This often results in active monsoon spells with widespread precipitation. Conversely, when the suppressed phase dominates the region, rainfall decreases, leading to weak or break monsoon conditions.
• Therefore, meteorologists closely monitor the MJO to improve monsoon forecasts and assess the likelihood of heavy rainfall or prolonged dry spells.
• The influence of the MJO is not limited to the Indian monsoon. It also plays a major role in the formation and intensification of tropical cyclones over the Indian Ocean, the Pacific Ocean, and even parts of the Atlantic Ocean.
• During its active phase, the atmosphere becomes more unstable, humidity increases, and vertical wind conditions become more favourable for cyclone development. As a result, periods of increased cyclone activity often coincide with the passage of the active MJO phase.
• Apart from affecting tropical weather, the MJO also influences atmospheric circulation in higher latitudes through a process known as teleconnection.
• Changes in tropical convection caused by the MJO can alter jet stream patterns, influencing winter storms, cold waves, heat waves, and heavy rainfall events in regions far away from the tropics, including North America, Europe, and East Asia. Thus, despite being a tropical phenomenon, its impacts extend across the globe.
• The MJO is often confused with the El Niño–Southern Oscillation, but the two are fundamentally different.
• The MJO is a moving atmospheric disturbance that travels continuously around the globe and lasts only a few weeks to a couple of months. ENSO, on the other hand, is a coupled ocean-atmosphere phenomenon centred over the equatorial Pacific Ocean and typically persists for several months to two years or more.
• While ENSO changes sea surface temperatures significantly, the MJO primarily affects atmospheric circulation and rainfall without producing major long-term changes in ocean temperatures.
• An easy way to understand the MJO is to imagine the tropical atmosphere as a giant circular race track. The active phase of the MJO resembles a moving cluster of rain-bearing clouds that travels steadily around this track, bringing heavy rainfall and thunderstorms wherever it passes.
• Behind this active phase follows the suppressed phase, which brings relatively dry and clear weather. This continuous movement creates alternating periods of wet and dry conditions across tropical regions

 

 

3. How does the Madden-Julian oscillation affect India?

 

 

• The Madden–Julian Oscillation (MJO) has a significant influence on India's weather, particularly the Southwest Monsoon, tropical cyclones, and extreme rainfall events.
• Since the MJO is a moving region of enhanced and suppressed convection (thunderstorm activity), its position relative to India determines whether the country experiences increased rainfall or dry conditions.
• The MJO usually originates over the tropical Indian Ocean and moves eastward across the maritime continent and the Pacific Ocean. When the active phase of the MJO is located over the Indian Ocean and the region surrounding India, it strengthens the upward movement of warm, moist air.
• This leads to increased cloud formation, widespread thunderstorms, and heavy rainfall over many parts of the country. As a result, the southwest monsoon becomes more vigorous, producing active monsoon conditions and above-normal rainfall.
• On the other hand, when the suppressed phase of the MJO moves over the Indian Ocean, the atmosphere experiences downward movement of air, reducing cloud formation and rainfall.
• During this period, India often witnesses breaks in the monsoon, where rainfall decreases significantly for several days despite the monsoon season being in progress. Such breaks can affect agricultural activities by reducing soil moisture and delaying crop growth.
• The MJO also influences the onset and progress of the southwest monsoon. A strong active MJO phase over the Indian Ocean during late May or early June can support the timely onset and rapid advancement of the monsoon across the Indian subcontinent.
• Conversely, if the active phase is located far away over the Pacific Ocean during this period, the onset may be delayed or the monsoon may initially remain weak.
• Another important impact of the MJO is on extreme rainfall events. When its active phase coincides with other favourable weather systems such as low-pressure areas or monsoon depressions over the Bay of Bengal or the Arabian Sea, rainfall intensity can increase dramatically.
• This may result in widespread flooding, landslides in mountainous regions, and urban flooding in major cities. Many episodes of exceptionally heavy monsoon rainfall in India have been linked to a strong active phase of the MJO.
• The MJO also plays a crucial role in the formation and intensification of tropical cyclones over the Bay of Bengal and the Arabian Sea. During its active phase, the atmosphere becomes more unstable, humidity increases, and vertical wind conditions become more favourable for cyclone development.
• Consequently, the probability of cyclogenesis and cyclone intensification rises when the active MJO is present over the northern Indian Ocean. In contrast, the suppressed phase generally inhibits cyclone formation by creating less favourable atmospheric conditions.
• India's agricultural sector is particularly sensitive to the MJO because agriculture depends heavily on the distribution of monsoon rainfall.
• An active MJO phase can provide beneficial rainfall for crops such as rice, cotton, sugarcane, and pulses. However, if the rainfall becomes excessive, it may damage standing crops through flooding and waterlogging. Similarly, an extended suppressed phase can reduce rainfall, leading to moisture stress and lower agricultural productivity.
• The MJO also affects temperature patterns across India. During the active phase, increased cloud cover and rainfall generally reduce daytime temperatures and provide relief from heat. During the suppressed phase, clear skies allow greater solar heating, often resulting in hotter daytime conditions and, in some seasons, the development of heat waves.
• Meteorologists in India, especially at the India Meteorological Department, closely monitor the MJO because it is one of the most reliable indicators for extended-range weather forecasting.
• Since the MJO evolves over several weeks, it helps forecasters predict active and weak phases of the monsoon, the likelihood of heavy rainfall, and the potential for tropical cyclone formation about two to four weeks in advance.
• This information is valuable for agriculture, water resource management, disaster preparedness, and reservoir operations.

 

 

4. What is the difference between Madden-Julian oscillation and ENSO?

 

 

 

• The Madden–Julian Oscillation (MJO) and the El Niño–Southern Oscillation (ENSO) are two of the most important climate phenomena affecting global weather.
• Although both originate in the tropical regions and influence rainfall, temperature, monsoons, and tropical cyclones, they differ significantly in their nature, duration, movement, and impacts.
• Understanding these differences is essential for interpreting weather and climate variations across the world.
• The Madden–Julian Oscillation is primarily an atmospheric phenomenon. It consists of a moving zone of enhanced and suppressed cloud formation and rainfall that travels eastward around the equator.
• The MJO originates over the tropical Indian Ocean and usually moves across the maritime continent, the tropical Pacific Ocean, and sometimes into the Atlantic Ocean. The complete cycle generally takes 30 to 60 days, making it an intra-seasonal weather phenomenon.
• In contrast, ENSO is a coupled ocean-atmosphere phenomenon. It develops due to changes in sea surface temperatures and atmospheric pressure across the equatorial Pacific Ocean. ENSO has three phases: El Niño, La Niña, and the neutral phase.
• Unlike the MJO, ENSO does not move continuously around the globe. Instead, it remains centred over the equatorial Pacific Ocean and influences global climate through changes in ocean temperatures and atmospheric circulation.
• An ENSO event typically lasts 9 to 12 months, although some events may continue for nearly two years.
• Another major difference lies in the timescale. The MJO is a short-term oscillation that affects weather patterns over several weeks. Meteorologists use it to forecast rainfall, tropical cyclones, and monsoon activity two to four weeks in advance.
• ENSO, on the other hand, operates over much longer periods and is used for seasonal climate forecasting, helping predict rainfall and temperature anomalies several months ahead.
• The movement of these two phenomena also differs considerably. The MJO is a travelling disturbance that continuously propagates eastward around the equator.
• Wherever its active phase passes, it enhances cloud formation, thunderstorms, and rainfall, while the following suppressed phase brings drier conditions.
• ENSO does not travel in this manner. Instead, it represents large-scale warming (El Niño) or cooling (La Niña) of the central and eastern equatorial Pacific Ocean, with atmospheric circulation adjusting to these ocean temperature changes.
• The influence of the two systems on the Indian monsoon is also different. A favourable active phase of the MJO over the Indian Ocean can strengthen the southwest monsoon for several weeks, leading to active monsoon spells and heavy rainfall.
• However, once the MJO moves away, its influence diminishes. ENSO affects the overall seasonal strength of the monsoon. During El Niño years, India often experiences weaker monsoon rainfall and an increased likelihood of drought, while La Niña years generally favour stronger monsoon rainfall and wetter-than-normal conditions.
• Although this relationship is not absolute, it remains one of the most important factors influencing India's seasonal rainfall.
• The MJO also has a strong influence on tropical cyclone formation because its active phase creates favourable atmospheric conditions for cyclone development over the Indian Ocean, western Pacific, and other tropical basins.
• ENSO also affects cyclone activity, but mainly by altering ocean temperatures and large-scale wind patterns over an entire cyclone season rather than over a few weeks.
• An important distinction is that the MJO is primarily driven by changes in atmospheric convection, whereas ENSO is driven by interactions between the ocean and the atmosphere, especially variations in sea surface temperatures and trade winds across the Pacific Ocean.
• Although they are different phenomena, the MJO and ENSO can interact with each other. For example, repeated strong MJO events can sometimes influence the evolution of El Niño or La Niña conditions by affecting westerly wind bursts over the Pacific Ocean.
• Similarly, the background conditions created by ENSO can modify the strength and behaviour of the MJO.

 

5. Why is the Southwest Monsoon critical for Kharif agriculture in India?

 

 

• The Southwest Monsoon is the backbone of India's agricultural economy and plays a decisive role in the success of the Kharif cropping season. Kharif crops are sown with the onset of the monsoon, generally during June and July, and harvested between September and October.
• Since a large proportion of India's cultivated land is still dependent on rainfall rather than irrigation, the timing, amount, and distribution of monsoon rainfall directly determine agricultural productivity, food security, and rural livelihoods.
• The southwest monsoon provides nearly 70–75% of India's annual rainfall, making it the primary source of water for agriculture.
• As the monsoon winds reach the Indian subcontinent from the Arabian Sea and the Bay of Bengal, they bring widespread rainfall across most parts of the country.
• This rainfall replenishes soil moisture, enabling farmers to prepare fields and sow Kharif crops such as rice, maize, cotton, soybean, groundnut, millets, pulses, and sugarcane.
• The onset of the southwest monsoon marks the beginning of the Kharif agricultural season.
• A timely arrival allows farmers to sow seeds at the optimum time, ensuring proper germination and healthy crop establishment. If the monsoon is delayed, sowing operations are postponed, shortening the growing season and often reducing crop yields. In severe cases, farmers may have to shift to short-duration or drought-resistant crop varieties.
• Apart from the onset, the distribution of rainfall throughout the season is equally important. Crops require water at different stages of growth, including germination, vegetative growth, flowering, and grain filling.
• Well-distributed rainfall ensures a continuous supply of moisture during these critical stages.
• However, prolonged dry spells or breaks in the monsoon can lead to moisture stress, poor plant growth, and lower productivity.
• Conversely, excessive rainfall within a short period can cause waterlogging, flooding, and root damage, affecting crop health and yield.
• The southwest monsoon is particularly important because nearly half of India's net sown area remains rain-fed, despite significant expansion of irrigation facilities. Farmers in these regions rely almost entirely on monsoon rainfall.
• Consequently, a good monsoon generally leads to higher agricultural production, while a weak or deficient monsoon often results in drought, crop failure, and financial distress among farming communities.
• Monsoon rainfall also replenishes reservoirs, lakes, rivers, ponds, and groundwater aquifers, which provide irrigation water during the later stages of the Kharif season and for the subsequent Rabi cropping season. Adequate reservoir storage ensures sufficient water availability for irrigation, drinking water, hydropower generation, and industrial use throughout the year.
• The performance of the Kharif season has a significant impact on India's food security. Crops such as rice and pulses constitute staple food items for millions of people.
• A successful monsoon leads to higher food grain production, improved food availability, and stable market supplies. In contrast, poor monsoon performance may reduce agricultural output, creating supply shortages and increasing dependence on buffer stocks or imports.
• The southwest monsoon also influences the Indian economy. Agriculture supports a substantial share of the country's population, particularly in rural areas. A normal monsoon generally increases farm incomes, boosts rural demand for goods and services, and supports overall economic growth.
• Conversely, a deficient or erratic monsoon can reduce agricultural income, lower rural consumption, and adversely affect sectors such as fertilizers, farm machinery, consumer goods, and banking.
• The monsoon has an important bearing on inflation, especially food inflation. Good rainfall usually leads to abundant production of cereals, vegetables, fruits, and pulses, helping stabilize food prices. On the other hand, deficient rainfall often reduces agricultural output, leading to higher food prices and contributing to overall inflationary pressures in the economy.
• The southwest monsoon also supports allied activities such as animal husbandry, fisheries, and horticulture. Adequate rainfall improves pasture availability for livestock, replenishes ponds used in inland fisheries, and provides favourable conditions for the cultivation of fruits, vegetables, and plantation crops. Thus, its benefits extend well beyond crop production.

 

6. Way Forward

 

 

An IMD bulletin on Wednesday forecast low to moderate rainfall activity in the areas covered by the monsoon — which is only around half of the country’s landmass. Around this time in June, the monsoon normally covers almost the entire country.

 

 

For Prelims: Indian and World Geography   For Mains: eneral Studies I: Important Geophysical phenomena such as earthquakes, Tsunami, Volcanic activity, cyclone etc

 

 

Previous Year Questions   1.With reference to Ocean Mean Temperature (OMT), which of the following statements is/are correct? (UPSC CSE, 2020) 1. OMT is measured up to a depth of 26ºC isotherm which is 129 meters in the south-western Indian Ocean during January-March. 2. OMT collected during January-March can be used in assessing whether the amount of rainfall in monsoon will be less or more than a certain long-term mean. Select the correct answer using the code given below: (a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2   Answer (b)

 

Source: Indianexpress