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El Nino, La Nina and El Nino Modoki - Explained

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EL Nino : The term "El Niño" originates from Spanish, meaning "the Christ Child," and was coined by fishermen residing along the coasts of Ecuador and Peru. It is used to describe the phenomenon of warming in the central and eastern Pacific Ocean. El Nino is the name given to the occasional development of warm ocean surface waters along the coast of Equador and Peru. When this warming Occurs the usual Upwelling of cold , nutrient rich deep ocean water is significantly reduced. El Nino Normally occurs around Christmas and usually lasts for a few weeks to few months. Normal Years: In a normal year, a surface low pressure develops in the region of northern Australia and Indonesia and a high pressure system over the coast of Peru.  As a result, the trade winds over the Pacific Ocean move strongly from east to west. The easterly flow of the trade winds carries warm surface waters westward, bringing convective storms (thunderstorms) to Indonesia and coastal Australia.  Al...
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Chandrayaan-3: Lunar Exploration and Discoveries

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Source : Indian Express      The article provides an overview of the Chandrayaan 3 mission, its scientific objectives, and its connection to previous Chandrayaan missions.  Chandrayaan 3 aims to enhance our understanding of the Moon's surface, composition, and geological features by utilising insights from Chandrayaan 1 and Chandrayaan 2.  The mission involves a 26-kg rover equipped with six wheels, with a capacity to cover 500 meters at a slow pace, will explore the lunar terrain after descending from the lander.  The rover's activities will begin during lunar dawn and continue for a lunar day, approximately 14 Earth days.  The lander and rover together carry six scientific payloads for data collection.  Chandrayaan 3's payloads will delve deeper into lunar understanding by investigating lunar seismic activity, mineral compositions, and the behaviour of electrons and ions near the lunar surface.  The mission also aims to build upon the...
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State of India’s Birds 2023 Report

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The " State of India’s Birds, 2023 " report indicates a general decline in the numbers of most bird species in the country, with some currently declining and others projected to decline in the long term.  The report is based on data from approximately 30,000 birdwatchers and assesses the distribution range, trends in abundance, and conservation status of India's bird species. The report was conducted by 13 partner organisations, including the Wildlife Institute of India (WII) and Zoological Survey of India (ZSI). The assessments rely on three indices. Two of them are related to change in abundance — long-term trend (change over 30 years) and current annual trend (change over past seven years) — and  The third is a measure of distribution range size in India. Key findings from the report : Decline in Raptors and Migratory Birds:  Raptors (birds of prey), migratory shorebirds, and ducks have experienced the most significant declines. Long-distance migrants, such as birds fr...
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