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Subject: Environment

  • [pib] Northern Limit of Monsoon (NLM)

    The Northern Limit of Monsoon (NLM) continues to pass through Diu, Surat, Nandurbar, Bhopal, Nowgong, Hamirpur, Barabanki, Bareilly, Saharanpur, Ambala & Amritsar.

    Try this question from CS Mains 2017:

    Q.What characteristics can be assigned to monsoon climate that succeeds in feeding more than 50 percent of the won population residing in Monsoon Asia?

    What is the Northern Limit of Monsoon?

    • NLM, is the northernmost boundary of India up to which monsoon rains have advanced on any given day.
    • So, it is a way of tracking the progress of monsoon clouds as they move over India’s landmass.
    • The India Meteorological Department (IMD) adds that the monsoon “advances northwards, usually in surges, and covers the entire country around July 15″.

    What are the Eastern and Western Arms?

    • It is the mountains of southern India that split the south-western winds, giving the Indian monsoon its ‘two arms.
    • The western arm of the monsoon is deflected northwards, by the Western Ghats, to (Mumbai) and then on to Pakistan.
    • The eastern arm travels up through the Bay of Bengal to (Kolkata) and Assam and is deflected north-westwards by the Himalayas.

    Also refer this link:

    Explain the formation of Indian monsoons. Highlight the link between monsoons and India’s cropping pattern. (15 marks)

  • Operation Olivia to protect Olive Ridley Turtles

    Every year, the Indian Coast Guard’s “Operation Olivia”, initiated in the early 1980s, helps protect Olive Ridley turtles as they congregate along the Odisha coast for breeding and nesting from November to December.

    Answer this question from CSP 2012 in the comment box:

    Q.Which one of the following is the national aquatic animal of India?

    (a) Saltwater crocodile

    (b) Olive ridley turtle

    (c) Gangetic dolphin

    (d) Gharial

    Olive Ridley Turtles

    • The Olive Ridley (Lepidochelys olivacea) is listed as vulnerable under the International Union for Conservation of Nature’s Red list.
    • All five species of sea turtles found in India are included in Schedule I of the Indian Wildlife Protection Act, 1972, and in the Appendix I of the CITES, which prohibits trade in turtle products by signatory countries.
    • Odisha has also formulated laws for protecting Olive Ridley turtles, and the Orissa Marine Fisheries Act empowers the Coast Guard as one of its enforcement agencies.
    • Studies have found three main factors that damage Olive Ridley turtles and their eggs — heavy predation of eggs by dogs and wild animals, indiscriminate fishing with trawlers and gill nets, and beach soil erosion.
    • Dense fishing activity along the coasts of Andhra Pradesh, Odisha and West Bengal, especially ocean-going trawlers, mechanized fishing boats, and gill-netters pose a severe threat to turtles.

    Their habitats

    • The Olive Ridley has one of the most extraordinary nesting habits in the natural world, including mass nesting called arribadas.
    • The 480-km-long Odisha coast has three arribada beaches at Gahirmatha, the mouth of the Devi river, and in Rushikulya, where about 1 lakh nests are found annually.
    • They generally return to their natal beach, or where they were born, to lay eggs as adults.
    • Mating occurs in the offshore waters of the breeding grounds and females then come ashore to nest, usually several times during a season.
    • They crawl ashore, dig a flask-shaped nest about 1.5 to 2 foot deep, and lay 100 to 150 eggs in each clutch.
    • Hatchlings emerge from their nests together in about seven to 10 weeks.

  • Species in news: Bharitalasuchus Tapani

    In the mid 20th century, researchers from the Indian Statistical Institute, Kolkata, carried out extensive studies on rocks of the Yerrapalli Formation in what is now Telangana, uncovering several fossils of Bharitalasuchus Tapani.

    Bharitalasuchus Tapani

    • This reptile belongs to a genus and species previously unknown to science. It is named Bharitalasuchus tapani considering Telugu etymology.
    • In the Telugu language, Bhari means huge, Tala means head, and Suchus is the name of the Egyptian crocodile-headed deity.
    • The species is named after paleontologist Tapan Roy Chowdhury in honour of his contribution to Indian vertebrate paleontology and especially his extensive work on the Yerrapalli Formation tetrapod fauna.

    Details of the reptile

    • The reptile belonged to a family of extinct reptiles named Erythrosuchidae.
    • A precise identification had not been possible earlier because the family was not known from other examples in India.
    • It was neglected because the fossil specimen was not as complete as those of other erythrosuchids from other countries.
    • The team notes that tapani were robust animals with big heads and large teeth, and these probably predated other smaller reptiles.
    • They were approximately the size of an adult male lion and might have been the largest predators in their ecosystems.

  • Species in news: Pyrostria Laljii

    A 15-meter-tall tree that belongs to the genus of the coffee family has recently been discovered from the Andaman Islands by a team of researchers from India and the Philippines.

    Observe this PYQ from CSP 2016:

    Q.Recently, our scientists have discovered a new and distinct species of banana plant which attains a height of about 11 metres and has orange-coloured fruit pulp. In which part of India has it been discovered?

    (a) Andaman Islands

    (b) Anamalai Forests

    (c) Maikala Hills

    (d) Tropical rain forests of northeast

    Pyrostria Laljii

    • The new species, Pyrostria laljii, is also the first record of the genus Pyrostria in India.
    • Plants belonging to the genus Pyrostria are usually found in Madagascar but the recently discovered species is new to science.
    • The tree is distinguished by a long stem with a whitish coating on the trunk, and oblong-obovate leaves with a cuneate base, and was first reported from South Andaman’s Wandoor forest.
    • Pyrostria laljii has been assessed as ‘Critically Endangered’ based on the International Union for Conservation of Nature’s (IUCN) Red List criteria.

  • Protection of ‘Heritage Trees’ in Maharashtra

    The Maharashtra government will make amendments to the Maharashtra (Urban Areas) Protection and Preservation of Trees Act of 1975, to introduce provisions for the protection of ‘heritage trees’.

    What are Heritage Trees?

    • Under the proposed amendment, a tree with an estimated age of 50 years or more shall be defined as a heritage tree.
    • It may belong to specific species, which will be notified from time to time.
    • Experts believe that in addition to the age, the state climate change department should also consider a tree’s rarity, its botanical, historical, religious, mythological and cultural importance in defining a heritage tree.
    • The local Tree Authority will have to ensure tree census to be carried out every five years along with counting of heritage trees

    How is the age of the tree determined?

    • The most common method of determining the age of the tree is Dendrochronology – or tree-ring dating also called growth rings.
    • Each year, roughly a tree adds to its girth, the new growth is called a tree ring. By counting the rings of a tree, the age can be determined.
    • However, the process is invasive. To analyse the rings, core samples are extracted using a borer that’s screwed into the tree and pulled out, bringing with it a straw-size sample of wood.
    • The hole in the tree is then sealed to prevent disease.

    Why was the concept of heritage tree introduced?

    • A heritage tree will get special protection.
    • Crucially, the tree’s age will determine the number of trees to be planted as part of the compensatory plantation – that is anyone cutting a heritage tree will need to plant trees in the same numbers as the cut tree’s age.
    • According to the current Compensatory Plantation in the state, one sapling has to be planted for each tree that is cut.
    • In Mumbai, as per the Tree Authority set up in 1976, to help in regulating the felling of trees and providing for the planting of an adequate number of new trees, the compensation ratios are 1:3.

    Changes with the amendment

    • As per the amendment, the number of trees planted will be equal to the age of the heritage tree that is cut.
    • For instance, if a 52-year-old tree is to be felled, then the party felling the tree will have to plant 52 trees in compensation, with each compensatory tree at least 6-8 ft in height at the time of planting.
    • The organization planting the compensation trees will also have to ensure the survival of the plantation for seven years and geo-tag the trees.
    • Such plantations can be carried out either in the same plot or a common amenity plot.
    • Through the introduction of a heritage tree, the state environment wants to discourage the cutting of heritage trees.
    • The amendment has the fine for illegal felling of trees from a maximum of Rs 5,000 to Rs 1 lakh per tree.

    What is the economic value of the tree?

    • In case compensatory plantation is not possible, the tree feller has to pay compensation for the economic valuation of the trees being felled.
    • While the state government has not defined the economic value of the tree, experts say that the amount of oxygen that a tree releases into the environment should determine its economic value.
    • A realistic assessment of the economic value of a tree, which may be permitted to fell, concerning its value to the environment and its longevity, about factors such as:

    the production of oxygen and carbon sequestration, soil conservation, protection of flora/fauna, its role in habitat and ecosystem integrity and any other ecologically relevant factor, distinct from timber/wood

    Tree Authority formation

    • The amendments also make room for the formation of the Maharashtra State Tree Authority and also tree authority in local civic bodies and councils.
    • The Tree Authority is tasked with “increasing the tree cover in urban areas and protecting the existing ones.” Experts shall be a part of the local tree authority.
    • Their knowledge and expertise will form the basis of decisions taken up by the authority.
    • A proposal to cut more than 200 trees of age 5 years or more, will be referred to the state tree authority.
    • The local TA will have to ensure that the project is not sub-divided into smaller parts to keep the number of trees below the defined threshold.
    • Ensure preparation of a tree plan and should aspire over the years to have 33 percent green belt in their area.

  • [pib] Aerosol Nucleation

    Scientists tracing the concentration, size and evolution of aerosol particles smaller than 3 nanometers at an urban location in India have found the frequent formation of sub-3nm aerosol particles in the atmosphere.

    What is Aerosol Nucleation?

    • The formation of small molecular clusters of sub-3nm size is technically called aerosol nucleation, and subsequent growth of these newly formed clusters to the large sizes is called atmospheric new particle formation (NPF).
    • NPF occurs everywhere in the terrestrial troposphere, and therefore it is a large source of aerosol numbers to the atmosphere.
    • Though extensively studied globally using field observations, laboratory experiments and modelling approach, it is largely unexplored in India.

    What has the new research found?

    • The research showed that a pool of sub-3nm particles is often present in the atmosphere, but how fast these clusters grow depends on various factors.
    • The scientists observed that only half of these events showed newly formed molecular clusters growing past 10 nm size.
    • Thus particle size distributions display a conventional banana-shaped aerosol growth, which is indicative of regional NPF event.

    Role of Sulphur

    • The team found a strong positive correlation between sub-3nm particle concentrations and sulphuric acid concentrations, confirming the potential role of sulfuric acid in the formation of sub-3nm particles.
    • While NPF often starts with sulphuric acid in the atmosphere, sulphuric acid alone fails to explain observed particle formation and growth rates in the atmosphere.
    • Other vapours such as ammonia, amines and organics play a crucial role in the growth of newly formed particles.
    • This has critical importance as a major fraction of these newly formed particles can reach to sizes of cloud condensation nuclei where they have climatic impacts.

  • Glacier melting in Hindu Kush Himalayas

    Up to two billion people in southeast Asia can face food and water shortages even as the Hindu Kush Himalayan (HKH) mountain ranges lose up to two-thirds of its ice by 2100, a United Nations-backed research flagged.

    Hindu Kush Himalayas

    • The HKH region, often referred to as the ‘Third Pole’, is spread over 3,500 square kilometers across eight countries including India, Nepal, and China.
    • The range forms the western section of the Hindu Kush Himalayan Region (HKH) and is the westernmost extension of the Pamir Mountains, the Karakoram, and the Himalayas.
    • It divides the valley of the Amu Darya (the ancient Oxus) to the north from the Indus River valley to the south.
    • It contains the world’s third-largest storage of frozen water after the Antarctica and Arctic.
    • Over 240 million people live in the region’s mountains; 1.7 billion live in the river basins downstream, while food grown in these basins reaches three billion people.

    Continuous warming

    • HKH region continues to warm through 21st century even if the world was able to limit global warming at the agreed 1.5 degrees Celsius.
    • Another study published in 2019 on the ice thickness of glaciers had estimated that glaciers in the HKH may contain 27 percent less ice than previously suggested.
    • The HKH region lies downwind from some of the most heavily polluted places on Earth. This threatens agriculture, climate as well as monsoon patterns.

  • Dihing Patkai is Assam’s 7th National Park

    The Assam government has notified Dihing Patkai as a National Park, four days after creating the 422-sq. km Raimona National Park in western Assam’s Kokrajhar district.

    Dihing Patkai NP

    • Dihing Patkai, in focus a year ago for illegal coal mining in the vicinity, encompasses the erstwhile Dehing Patkai Wildlife Sanctuary, the Jeypore Reserve Forest and the western block of the Upper Dihing Reserve Forest.
    • The 234.26-sq. km Dihing Patkai straddling eastern Assam’s Dibrugarh and Tinsukia districts is a major elephant habitat and 310 species of butterflies have been recorded there.
    • The park has 47 species each of reptiles and mammals, including the tiger and clouded leopard.

    Answer this PYQ in the comment box:

    Q.Which one of the following National Parks has a climate that varies from tropical to subtropical, temperate and arctic?

    (a) Khangchendzonga National Park

    (b) Nandadevi National Park

    (c) Neora Valley National Park

    (d) Namdapha National Park

    NPs in Assam

    • Assam now has the third most National Parks after the 12 in Madhya Pradesh and nine in the Andaman and Nicobar Islands.
    • The five older National Parks in the State are Kaziranga, Manas, Nameri, Orang and Dibru-Saikhowa.
    • Kaziranga and Manas are UNESCO World Heritage Sites.
    • They are also tiger reserves along with Nameri and Orang.

  • Degradation of Aravalis

    The Supreme Court has ordered the Haryana government to take “all essential measures” to remove encroachments, including some residential constructions, in the ecologically fragile Aravali forest land near a village.

    Aravali Range

    • The Aravali is a mountain range in Northwestern India, running approximately 670 km in a southwest direction, starting near Delhi, passing through southern Haryana and Rajasthan, and ending in Gujarat.
    • The highest peak is Guru Shikhar at 1,722 meters.
    • The Aravalli Range, an eroded stub of ancient mountains, is the oldest range of fold mountains in India.
    • The natural history of the Aravalli Range dates back to times when the Indian Plate was separated from the Eurasian Plate by an ocean.
    • Three major rivers and their tributaries flow from the Aravalli, namely Banas and Sahibi rivers which are tributaries of Yamuna, as well as Luni River which flows into the Rann of Kutch.
    • The Sariska-Delhi leopard wildlife corridor is a 200 km long important biodiversity and wildlife corridor which runs from the Sariska Tiger Reserve in Rajasthan to Delhi Ridge.

    Threats to its existence

    • Ecological degradation in the Aravalli region is in an alarming situation.
    • This is due to the increasing population of humans and cattle, injudicious use of natural resources, unscientific mining, uncontrolled grazing, and felling of trees.

    Answer this PYQ in the comment box:

    Q.With reference to the river Luni, which one of the following statements is correct?

    (a) It fl ows into Gulf of Khambhat

    (b) It fl ows into Gulf of Kuchchh

    (c) It fl ows into Pakistan and merges with a tributary of Indus

    (d) It is lost in the marshy land of the Rann of Kuchchh

  • [pib] Sustainable Public Procurement (SPP)

    On the occasion of World Environment Day, a new product category of Green Room Air Conditioners was launched on the Government e-Marketplace (GeM) under the Sustainable Public Procurement (SPP) program.

    What is Sustainable Public Procurement (SPP)?

    • SPP is a process by which public authorities seek to achieve the appropriate balance between the three pillars of sustainable development – economic, social and environmental – when procuring goods, services or works at all stages of the project.
    • These three pillars are called Triple Bottom Line.
    • The UN Environment Programme (UNEP) has been active in the promotion of Sustainable Public Procurement at national, regional and global levels since 2005.

    Why need SPP?

    • Public procurement spend in India is nearly 15-20% of its GDP.
    • Introducing SPP to this huge quantum of government procurement will further complement the country’s climate policy objectives.
    • This innovation can provide financial savings for government buyers and will meet evolving environmental challenges by moving towards a circular economy.

    Back2Basics: Government E-Marketplace

    • The GeM is a one-stop National Public Procurement Portal to facilitate online procurement of common use Goods & Services required by various Government Departments / Organizations / PSUs.
    • It was launched in 2016 to bring transparency and efficiency in the government buying process.
    • GEM aims to enhance transparency, efficiency and speed in public procurement.
    • It is a completely paperless, cashless and system driven e-marketplace that enables procurement of common use goods and services with minimal human interface.
    • It provides the tools of e-bidding, reverse e-auction and demand aggregation to facilitate the government users to achieve the best value for their money.
    • The purchases through GeM by Government users have been authorized and made mandatory by the Ministry of Finance by adding a new Rule No. 149 in the General Financial Rules, 2017.
    • It has been developed by Directorate General of Supplies and Disposals (Ministry of Commerce and Industry) with technical support of National e-governance Division (MEITy).