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GS Paper: GS1

  • Positive Indian Ocean Dipole (IOD) to aid Monsoon this year

    Why in the News?

    Australian weather agencies predict the possible return of a positive Indian Ocean Dipole (IOD) in the latter half of 2024.

    What is the Indian Ocean Dipole (IOD)?

    • The IOD is also known as the Indian Nino. It is characterized by the differential heating of ocean waters in the eastern and western parts of the basin.
    • Similar to the El Nino Southern Oscillation (ENSO) in the Pacific, the IOD involves phases of ocean temperatures and atmospheric conditions that affect weather patterns across the region and beyond.
    • There are two main phases of the IOD:
      • Positive Phase: In this phase, the western Indian Ocean becomes warmer than average, and the eastern part cooler than average. This results in greater convection and rainfall over the western Indian Ocean and adjacent land areas like East Africa, while reducing rainfall over the eastern Indian Ocean and places like Indonesia and Australia.
      • Negative Phase: The opposite conditions prevail during this phase, with cooler waters in the western Indian Ocean and warmer waters in the east. This leads to increased rainfall in the eastern Indian Ocean regions and drier conditions in the western part and East Africa.

    Back2Basics: El Nino-Southern Oscillation (ENSO)

    • El Nino and La Nina are two opposite phases of the El Nino-Southern Oscillation (ENSO) cycle.
    • ENSO is a naturally occurring phenomenon that involves the interaction between the ocean and atmosphere in the equatorial Pacific.

    Here is a detailed comparison of El Nino and La Nina

    El Nino La Nina
    Definition Warmer-than-normal sea surface temperatures Cooler-than-normal sea surface temperatures
    Frequency Every two to seven years Every two to seven years
    Duration Several months to a year or more Several months to a year or more
    Impact on winds Weakens trade winds, leading to changes in patterns Strengthens trade winds, leading to changes in patterns
    Impact on rains Reduces rainfall and can cause droughts Increases rainfall and can cause flooding
    Impact on temp. Warmer-than-average temperatures Colder-than-average temperatures
    Global effects Droughts in Asia and Africa, floods in Americas Floods in Asia and Africa, droughts in South America

     

    Impact on the Indian Monsoon:

    The Indian Ocean Dipole has significant impacts on the Indian monsoon system:

    1. Positive IOD often coincides with a stronger Southwest Monsoon, bringing more rainfall to India. This is due to the shift in warm water and accompanying convection towards India, which enhances the monsoon rainfall.
    2. Negative IOD can weaken the Southwest Monsoon, resulting in less rainfall and potential drought conditions in India. The shift of warm water away from India reduces the necessary heat and moisture that drive the monsoon rains.

    PYQ:

    [2017] With reference to ‘Indian Ocean Dipole (IOD)’ sometimes mentioned in the news while forecasting Indian monsoon, which of the following statements is/are correct?

    1. IOD phenomenon is characterised by a difference in sea surface temperature between tropical Western Indian Ocean and tropical Eastern Pacific Ocean.

    2. An IOD phenomenon can influence an El Nino’s impact on the monsoon.

    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

  • Eta Aquariid Meteor Shower and how it can be spotted

    Why in the news?

    • The Eta Aquariid meteor shower, an annual event, will reach its peak on May 5 and 6.
    • This meteor shower is a result of Earth intersecting with the debris trail left by Halley’s Comet during its orbit.

    Halley’s Comet

    • Halley’s Comet is a short-period comet visible from Earth every 75–79 years.
    • It was last seen in Earth’s skies in 1986 and was met in space by an international fleet of spacecraft. It will return in 2061 on its regular journey around the Sun.

    What are Meteoric Showers?

    • Meteors, fragments of dust, rock and ice, are expelled from comets during their celestial orbits around the sun.
    • The Earth’s atmosphere heats these space rocks as they descend, leaving luminous streaks of gas in their way.
    • NASA’s records confirms existence of over 30 meteor showers annually.

    Origin of Meteor Showers:

    • Meteor showers originate from comets, remnants of the solar system’s formation composed of dust, rock, and ice.
    • Comets orbit the Sun in highly elliptical paths, and as they approach, they heat up, releasing gases and dust to form a glowing head and a tail stretching millions of miles.
    • When Earth traverses through the debris left behind by comets along their orbital plane, we witness meteor showers.

    About Eta Aquariids

    • Known for their rapid speed, Eta Aquariid meteors produce long, glowing tails lasting several minutes.
    • Observers in the Southern Hemisphere can witness approximately 30 to 40 meteors per hour during the peak, while those in the Northern Hemisphere may see around 10 meteors per hour.
    • They seem to originate from the Aquarius constellation, hence the name ‘Eta Aquariid.’

    PYQ:

    [2014] What is a coma, in the content of astronomy?

    (a) Bright half of material on the comet

    (b) Long tail of dust

    (c) Two asteroids orbiting each other

    (d) Two planets orbiting each other

  • ‘Hicky’s Bengal Gazette’: India’s First Newspaper

    Why in the news?

    • World Press Freedom Day, observed annually on May 3, underscores the significance of journalism in society, tracing its roots back to pivotal moments in history.
    • Hicky’s Bengal Gazette, founded by James Augustus Hicky in 1780, marked the inception of Indian journalism, serving as a platform for social discourse and political critique.

    Who was James Augustus Hicky?

    • Born in Ireland in the 1730s, James Augustus Hicky ventured to India, then known as the “Jewel in the Crown of the British Empire“, in search of better opportunities.
    • Faced with initial setbacks, including debts that led to his imprisonment, Hicky demonstrated resilience by setting up a printing press within the jail premises.

    Establishment of ‘Hicky’s Bengal Gazette’:

    • ‘Hicky’s Bengal Gazette’ was the first newspaper ever published in India (indeed in Asia), with its inaugural edition released on January 29, 1780.
    • Hicky served as its founder-editor, aiming to cater primarily to the European community in Calcutta.
    • He initially focusing on local issues such as road repairs and maintenance.
    • The newspaper later delved into broader societal concerns, including government corruption and civic issues.
    • Despite its reputation for gossip and salacious content, the Gazette also published articles critical of the British East India Company and advocated for infrastructure development and sanitation improvements.
    • Hicky’s newspaper was printed once a week on Saturday, and retailed for Rs 1.
    • Its circulation was estimated to be around 400 copies per week, although possibly more.

    Challenges and Legal Battles:

    • The Gazette faced legal challenges, including multiple libel lawsuits filed by prominent figures such as Governor General Warren Hastings in 1780s and missionary Johann Zacharias Kiernander.
    • He described Hastings in an article as being Robert Clive’s “miserable successor”.
    • Hicky’s bold stance against powerful figures, including scathing critiques of Hastings’ expansion policies, led to his imprisonment and financial ruin due to legal fees and penalties.
    • The publication was ceased on 30 March 1782.

    Legacy and Impact:

    • Despite its eventual closure due to legal pressure and financial constraints, ‘Hicky’s Bengal Gazette’ left an indelible mark on Indian journalism.
    • Hicky’s pioneering efforts laid the groundwork for the development of a vibrant media landscape in India, inspiring subsequent generations of journalists and press pioneers.
    • The Gazette’s brief but impactful existence demonstrated the power of the press in advocating for societal change and holding the powerful to account.

    PYQ:

    [2020] The Vital-Vidhwansak, the first monthly journal to have the untouchable people as its target audience was published by:

    (a) Gopal Baba Walangkar

    (b) Jyotiba Phule

    (c) Mohandas Karamchand Gandhi

    (d) Bhimrao Ramji Ambedkar

  • Mapping: Garo Hills

    Why in the news?

    • Geological Survey of India (GSI) explorers have made a breakthrough, uncovering ancient fossils in Tolegre, South Garo Hills of Meghalaya.
    • It is speculated that the fossils could be linked to the genera Rhodocetus or Amulocetus (now extinct), considered ancestors of modern whales.

    About Garo Hills

    • The Garo Hills, located in Meghalaya, are part of the Garo-Khasi range, one of the hill ranges in the northeastern region of India.
    • They are situated in the western part of Meghalaya, bordering Bangladesh to the south and west.
    • The terrain of the Garo Hills is rugged and hilly, characterized by dense forests, steep slopes, and deep valleys.
    • The Nokrek is highest Peak, which stands at approximately 1,415 meters (4,642 feet) above sea level.
    • The climate in the Garo Hills is typically humid subtropical, with heavy rainfall during the monsoon season, which usually lasts from June to September.
    • Numerous rivers and streams, including the Brahmaputra, Someshwari, and Jinjiram rivers crisscross this region.
    • The region is also known for its picturesque waterfalls, such as the Pelga Falls, located near Tura, the largest town in the Garo Hills.
    • The Nokrek National Park, located within, is recognized as a UNESCO Biosphere Reserve and is home to various endangered species, including the Asian elephant and the red panda.
    • The Garo Hills are inhabited predominantly by the Garo tribe, one of the major ethnic groups in Meghalaya.

     

    PYQ:

    [2013] Consider the following pairs:

    1. Nokrek Bio-Sphere Reserve : Garo Hills

    2. Logtak (Loktak) Lake : Barail Range

    3. Namdapha National Park: Daphla Hills

    Which of the above pairs is/are correctly matched?

    (a) 1 only

    (b) 2 and 3 only

    (c) 1, 2 and 3

    (d) None

  • Mapping: Hopen Island in the Svalbard Archipelago

    Why in the news?

    Researchers disclosed that one of Norway’s Hopen Island in the Svalbard Archipelago witnessed its first walrus death due to Bird Flu (H5N1).

    About Hopen Island in the Svalbard Archipelago

    • Hopen Island is situated in the southern part of the Svalbard Archipelago, between the Barents Sea and the Greenland Sea.
    • The island covers an area of about 47 square km, making it one of the smaller islands in the Svalbard group.
    • The landscape mainly consists of low-lying tundra, rocky outcrops, and coastal cliffs.
    • Like the rest of Svalbard, Hopen Island experiences a harsh Arctic climate. Winters are long, dark, and extremely cold, while summers are short and cool.
    • It serves as an important breeding ground for seabirds such as guillemots, puffins, and kittiwakes. Polar bears are also occasionally spotted on the island, along with walruses, seals, and Arctic foxes.
    • It is uninhabited and largely inaccessible to humans due to its remote location and extreme weather conditions.
    • Historically, Hopen Island has been of strategic importance due to its location between the Barents Sea and the Greenland Sea.

    H5N1 Bird Flu: Details

    • H5N1 originated from a virus outbreak on a goose farm in China in 1996 and has since evolved into a highly pathogenic strain.
    • The virus quickly spread from Europe to Africa, Asia, North America, and South America, and most recently, it reached mainland Antarctica.
    • H5N1 is a subtype of the influenza A virus that causes severe respiratory disease in birds, known as avian influenza or “bird flu”.
    • Influenza A viruses are classified by subtypes based on the properties of their surface proteins, with H5N1 being one subtype.

    How widespread is it?

    • The virus has affected birds in over 80 countries, resulting in mass culling of poultry and wild birds.
    • Furthermore, it has now begun infecting mammals, including seals, sea lions, and marine mammals.
    • While humans rarely contract bird flu, those at risk are typically individuals who have extensive contact with infected birds at poultry farms.
    • Bird flu first broke out in Maharashtra in 2006.
    • The H5N1 virus led to the culling of millions of poultry so as to contain the virus. But it has resurfaced from time to time.

     

    PYQ:

    [2014] Which one of the following pairs of islands is separated from each other by the ‘Ten Degree Channel’?

    (a) Andaman and Nicobar

    (b) Nicobar and Sumatra

    (c) Maldives and Lakshadweep

    (d) Sumatra and Java

  • [PREMIUM] To the South Pole – Antarctica

    Why in the news?

    The Antarctic Treaty has sparked debates among policymakers, scientists, and the public, as they weigh the balance between environmental conservation, economic interests, and geopolitical concerns in Antarctica.

    About Antarctica

      • Antarctica is the fifth-largest continent, covering an area of approximately 14 million square km.
      • It is situated entirely within the Antarctic Circle, with its geographic center near the South Pole.
      • It is the coldest, driest, and windiest continent on Earth.
      • The interior of Antarctica is a polar desert, receiving very little precipitation, mostly in the form of snow.
    • The Antarctic Ice Sheet is the largest single mass of ice on Earth, containing approximately 70% of the world’s freshwater.

    Geographical Features:

    Description
    Mountains
    • The continent is home to several mountain ranges, including the Transantarctic Mountains.
    • Vinson Massif is the highest peak at 4,892 meters (16,050 feet) above sea level.
    Ice Shelves Large floating ice shelves extend along the coast, formed by glaciers flowing from the interior, crucial for stabilizing the Antarctic ice sheet.
    Glaciers Numerous glaciers flow from the high interior to the coast, including Pine Island Glacier and Thwaites Glacier, among the largest and fastest-moving in the world.
    Icebergs
    • Glaciers calve off large chunks of ice, forming icebergs of various sizes.
    • Antarctic Iceberg A-68, which broke off from the Larsen C Ice Shelf in 2017, was one of the largest recorded.
    Plateaus Much of Antarctica’s interior consists of high, flat plateaus covered by ice, reaching elevations over 4,000 meters (13,000 feet) above sea level.
    Ice-Free Areas Despite being predominantly ice-covered, some ice-free areas exist along the coastlines and in the Antarctic Peninsula region, supporting limited vegetation and wildlife.

    Territorial Claims on Antarctica:

    The countries with territorial claims in Antarctica are:

    1. Argentina: Claims a sector of Antarctica known as Argentine Antarctica.
    2. Australia: Claims the Australian Antarctic Territory.
    3. Chile: Claims a sector of Antarctica known as Chilean Antarctic Territory.
    4. France: Claims a sector of Antarctica known as Adélie Land.
    5. New Zealand: Claims the Ross Dependency.
    6. Norway: Claims a sector of Antarctica known as Queen Maud Land.
    7. United Kingdom: Claims a sector of Antarctica known as the British Antarctic Territory.
    8. United States: Claims a sector of Antarctica known as the Marie Byrd Land.

    India’s Antarctic Outreach

    • Initiated in 1981, India’s Antarctic Program, managed by National Centre for Polar and Ocean Research, encompasses multi-disciplinary research expeditions.
    • With the establishment of research bases like Dakshin Gangotri (1983) (now decommissioned), Maitri (1989), and Bharati (2012), India contributes significantly to Antarctic exploration.
    • Notably, India’s presence in Antarctica includes a Post Office established in 1984, facilitating communication and research logistics.

     

    PYQ:

    [2011] The formation of ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole?

    (a) Presence of prominent tropospheric turbulence; and inflow of chlorofluorocarbons

    (b) Presence of prominent polar front and stratospheric’: Clouds; and inflow of chlorofluorocarbons

    (c) Absence of polar front and stratospheric clouds; and inflow of methane and chlorofluorocarbons

    (d) Increased temperature at polar region due to global warming.

  • Patachitra Scroll Paintings

    Why in the news?

    Patachitra Paintings of women in Paschim Medinipur’s Pingla block in West Bengal has become popular worldwide.

    About Bengal Patachitra

    • Patachitra, also spelled as Pattachitra, is a traditional form of scroll painting that originated in the eastern Indian states of Odisha and West Bengal, as well as parts of Bangladesh. The term “Patachitra” derives from Sanskrit, where “pata” means “cloth” and “chitra” means “picture.”
    • These paintings are typically created on cloth canvas, palm leaves, or paper. Artists associated with Patachitra are known as Patuas.
    • Origin: Bengal Patachitra is believed to have originated in rural Bengal, with some historical references suggesting its existence during the Pre-Pala period.
    • Themes and Style:
      • The themes of Bengal Patachitra are diverse, ranging from religious and mythological narratives to secular subjects.
      • Religious themes often depict stories from Hindu epics like Ramayana and Mahabharata, as well as folklore such as Manasha and Chandi.
      • Secular themes include important news events, accidents, scandals, and social issues.
      • Each Patachitra is accompanied by a song called Patua Sangeet, sung by the artists while unfurling the scroll.
    • Aspects of Painting:
      • Chalchitra: Background paintings associated with religious idols, such as Durga Pratima.
      • Durga Pot: Special Patachitras worshiped during Durga Puja, often featuring images of gods and goddesses.
      • Various Technique: Different districts have distinct techniques, colors, and designs. For example, Purulia Patachitras prefer burnt sienna with white and yellow patches, while Hooghly and Manbhum scrolls exhibit modernistic abstract linear treatment.
      • Artists: Bengal Patua artists, also known as Chitrakars, are concentrated in villages like Naya in the Medinipur district.
      • Colors: Bengal Patachitra typically uses natural colors derived from materials like chalk dust (for white), pauri (for yellow), cultivated indigo (for blue), bhushakali (for black), and mete sindur (for red).

  • Taam Ja’: World’s Deepest Blue Hole

    Why in the news?

    Researchers have made a discovery in Mexico, uncovering the world’s deepest blue hole, known as Taam Ja’ Blue Hole (TJBH).

    What are Blue Holes?

    • Blue holes, such as TJBH, are formed in coastal regions with soluble bedrock, such as limestone, marble, or gypsum.
    • Water percolates through the rock, dissolving minerals and widening cracks, ultimately leading to the formation of sinkholes.
    • Famous examples: 410-foot Great Blue Hole in Belize, the 663-foot Dean’s Blue Hole in the Bahamas and the 328-foot Blue Hole in the Red Sea near Dahab, Egypt.

    About Taam Ja’ Blue Hole (TJBH)

    • TJBH extends at least 1,380 feet (420 meters) below sea level, making it the deepest known underwater sinkhole in the world.
    • It is located in Chetumal Bay off the southeast coast of the Yucatan Peninsula.
    • It was first discovered in 2021, was originally thought to be 900 feet deep.
    • This discovery surpasses the previous record-holder, the Sansha Yongle Blue Hole in the South China Sea, by an impressive 480 feet.

    Research Expedition and Findings

    • Scientists utilized a conductivity, temperature, and depth (CTD) profiler to collect data about the environmental conditions within the blue hole.
    • Despite reaching depths of 1,640 feet (500 meters), the CTD profiler was unable to reach the bottom of TJBH, indicating its remarkable depth.
    • Data from the profiler suggested the presence of different water layers within the blue hole, with conditions resembling those of the Caribbean Sea at depths below 1,312 feet (400 meters).

    PYQ:

    [2017] In the context of mitigating the impending global warming due to anthropogenic emissions of carbon dioxide, which of the following can be the potential sites for carbon sequestration?

    1. Abandoned and uneconomic coal seams.

    2. Depleted oil and gas reservoirs.

    3. Subterranean deep saline formations.

    Select the correct answer using the code given below:

    (a) 1 and 2 only

    (b) 3 only

    (c) 1 and 3 only

    (d) 1, 2 and 3

  • Unveiling of Raja Ravi Varma’s Indulekha Painting

    Why in the News?

    The first true copy of Raja Ravi Varma’s painting “Indulekha” will be unveiled at Kilimanoor Palace, the birthplace of the legendary artist, on his 176th birth anniversary celebrations.

    About the Indulekha Painting:

    • The painting depicts Indulekha, the protagonist of the first modern Malayalam novel by O. Chandu Menon, published in 1889.
    • The painting holds significance as it is believed to have inspired Ravi Varma’s famous work, “Reclining Lady.”
    • The oil painting portrays Indulekha holding a letter, dated 1892.
    • It exhibits meticulous attention to detail and symmetry, characteristic of Ravi Varma’s style.

    Who was Raja Ravi Varma (1848-1906)?

    • Raja Ravi Varma was born in April 1848 in Kilimanoor, Kerala, to a family which was very close to the royals of Travancore.
    • Often referred to as the father of modern Indian art, he is widely known for his realistic portrayal of Indian gods and goddesses.
    • While he majorly painted for the royalty, he is also credited for taking art to the masses with his prints and oleographs.
    • Patronised by Ayilyam Thirunal, the then ruler of Travancore, he learnt watercolour painting from the royal painter Ramaswamy Naidu.
    • He later trained in oil painting from Dutch artist Theodore Jensen.

    Fame as a notable painter

    • Following a portrait of Maharaja Sayajirao of Baroda, he has commissioned 14 Puranic paintings for the Durbar Hall of the new Lakshmi Vilas Palace at Baroda.
    • Depicting Indian culture, Varma borrowed from episodes of Mahabharata and Ramayana for the same.
    • He also received patronage from numerous other rulers, including the Maharaja of Mysore and Maharaja of Udaipur.
    • As his popularity soared, the artist won an award for an exhibition of his paintings at Vienna in 1873.
    • He was also awarded three gold medals at the World’s Columbian Exposition in Chicago in 1893.
    • Viceroy Lord Curzon honoured him with the Kaisar-i-Hind Gold Medal for his service.

    Nature of his artforms

    • Much of his celebrated art also borrows heavily from Indian mythology.
    • In fact, he is often credited with defining the images of Indian gods and goddesses through his relatable and more realistic portrayals often painted with humans as models.
    • The depictions include Lakshmi as the goddess of wealth, Saraswati as the goddess of knowledge and wisdom, and Lord Vishnu with his consorts, Maya and Lakshmi.
    • Raja Ravi Varma aspired to take his art to the masses and the intent led him to open a Lithographic Press in Bombay in 1894.
    • The first picture printed at Varma’s press was reportedly The Birth of Shakuntala, followed by numerous mythological figures and saints such as Adi Shankaracharya.

    Major works

    • It is believed that he had made around 7,000 paintings before his death at the age of 58.
    • But only one painting is now left in ‘Chithrashala,’ the artist’s studio at Kilimanoor Palace — an unfinished portrait of ‘Parsi lady’ which was his last work.
    • Some of his popular works include ‘Lady in the Moonlight’, ‘Nair Lady Adorning Her Hair’, ‘Malabar Lady with Violin’, ‘Lady with Swarbat’, and ‘Maharashtrian Lady with Fruits’.
    [2018] The well-known painting “Bani Thani” belongs to the

    (a) Bundi school

    (b) Jaipur school

    (c) Kangra school

    (d) Kishangarh school

  • Chin-Kuki-Zo Tribes: Backdrop of Ethnic Conflict in Manipur

    Why in the news?

    Manipur CM took it to social media where he alleged an “unnatural growth” in the population of the “Chin-Kuki-Zo” tribes in the state, posing a perceived threat to indigenous communities and national security.

    About Chin-Kuki-Zo Tribes

    Chin Tribe Kuki Tribe Zo Tribe
    Ethnic Composition Major ethnic group in Myanmar’s Chin State; known for distinct customs and language. Heterogeneous group in Northeast India; recognized for diverse subtribes. Diverse ethnic group in Northeast India, Myanmar, and parts of Bangladesh.
    Geographical Distribution Primarily in Myanmar’s Chin State; significant populations in Indian states like Mizoram. Mainly in Northeast India; also found in Chin State, Myanmar. Inhabits Northeast India, particularly Mizoram and Manipur; also in parts of Myanmar and Bangladesh.
    Language Chin language, part of Kuki-Chin subgroup of Tibeto-Burman family. Kuki-Chin languages; various dialects with distinct variations. Mizo-Kuki-Chin languages; different dialects within Tibeto-Burman family.
    Culture and Traditions Vibrant music, dance, festivals; celebrates Chin National Day. Rich oral traditions, folk music; celebrates festivals like Chavang Kut. Rich oral literature, vibrant festivals; celebrates Chapchar Kut and Mim Kut.
    Livelihood Historically practiced subsistence agriculture; now diversified livelihoods. Historically practiced shifting (Jhum) cultivation; now engaged in various occupations. Historically practiced shifting (Jhum) cultivation; now diverse livelihood patterns.
    Religion Predominantly Christianity with some traditional animistic beliefs. Predominantly Christianity with traditional animistic practices. Predominantly Christianity with remnants of traditional beliefs.
    Socio-Political Organization Advocates for cultural identity and rights; e.g., Chin National Front. Promotes Kuki identity; active organizations like Kuki National Organization. Promotes Zo identity; e.g., Zomi Council and Mizo Zirlai Pawl.

    Issues with their migration

    The Chin-Kuki-Zo tribes in Manipur are contributing to the conflict in the state due to various factors.

    • There have been longstanding demands from various tribal groups for greater recognition of their ethnic identity and autonomy within Manipur.
    • Land ownership and control are significant issues among the Chin-Kuki-Zo tribes in Manipur.
    [2016]  Consider the following pairs: (2016)

    Community sometimes  mentioned in the news In the affairs of
    1. Kurd Bangladesh
    2. Madhesi Nepal
    3. Rohingya Myanmar

    Which of the pairs given above is/are correctly matched?

    (a) 1 and 2
    (b) 2 only
    (c) 2 and 3
    (d) 3 only