February 28, 2024

Geography


Atmospheric Rivers

The state of California in USA has been battered by incessant rains caused by the atmospheric river storms.  ABOUT ATMOSPHERIC RIVERS Atmospheric Rivers indicate long narrow, elongated corridors of concentrated moisture transport associated with extratropical cyclones. These are largest transport mechanisms of freshwater on Earth. Strong landfall results in huge amounts of precipitation in short periods of time leading to flooding and mudslides. The term “Pineapple Express” is sometimes used to refer to atmospheric rivers that originate near Hawaii and travel eastwards towards the west coast of North America. Characteristics of Atmospheric Rivers Typically formed in the tropics or subtropics....Read More

Alpenglow

An astronaut stationed at the International Space Station has shared some breathtaking images of the mesmerising 'alpenglow' phenomenon near the Hindu Kush mountain range in India. ABOUT ALPENGLOW Alpenglow refers to the indirect sunlight reflected or diffracted by the atmosphere before sunrise or after sunset, giving a horizontal reddish glow near the horizon opposite the Sun. Alpenglow occurs when direct sunlight around sunrise or sunset is reflected off airborne precipitation, ice crystals or particulates in the lower atmosphere, as the sunlight has no direct path to reach a mountain. After sunset, if there are no mountains the aerosols in the....Read More

Lake Victoria

India-based think tank Centre for Science and Environment (CSE) and National Environment Management Council (NEMC), Tanzania conducted a multination stakeholder consultation to decide on strategies to restore the Lake Victoria. It is world’s second-largest and the largest freshwater lake in Africa. Largest freshwater lake in the world is Lake Superior. Three countries share the lake’s borders and resources for fisheries, freshwater and transportation: Tanzania, Uganda and Kenya. Lake Victoria and its flora and fauna support the livelihoods of about 45 million people. Lake Victoria touches the Equator in its northern side. It covers a total area of 68,800 sq. km....Read More

National Centre for Seismology recently reported an earthquake of 3.9 magnitude , with its epicenter near Kishtwar in J&K. There were no reports of any loss of life or damage to property. ABOUT NATIONAL CENTRE FOR SEISMOLOGY National Center for Seismology (NCS) is the nodal agency of the Government of India for monitoring earthquake activity in the country. It is an attached office of the Ministry of Earth Sciences (MOES). NCS maintains the National Seismological Network of 155 stations each having state of art equipment and spreading all across the country. NCS monitors earthquake activity all across the country through....Read More

Scientists have discovered an ancient 20 million year old underwater mountain range hidden within the world's strongest ocean current, the Antarctic Circumpolar Current. The range consists of eight dormant volcanoes reaching heights of 1,500 meters above the seafloor. They were discovered halfway between Tasmania and Antarctica, and four of the volcanoes are new discoveries. This revelation came to light during a high-resolution mapping expedition conducted by an Australian and international research team. ABOUT ANTARCTIC CIRCUMPOLAR CURRENT The Antarctic Circumpolar Current (ACC) is the most important current in the Southern Ocean. It is the only current that flows completely around the....Read More

Chilla-i-Kalan

Chilla-i-Kalan is a Persian term that means ‘major cold’ and it refers to the 40-days of harsh winter in Kashmir. It starts from December 21 and ends on January 30. During the 40 day ‘Chilla-i-Kalan’, it is said earth goes dead, air and water are the coldest. It will be followed by a 20-day-long ‘Chila-i-Khurd’ or small cold (January 31 and February 19) and 10-day-long ‘Chilla-i-Bacha’ or baby cold (February 20 to March 2).Read More

Indian hockey team midfielder Hardik Singh was named the men’s FIH Player of the Year at the FIH Hockey Star Awards 2023. Hardik Singh was part of India’s Tokyo 2020 bronze medal-winning team. He was part of the gold medal-winning Indian team at the Asian Games and Asian Champions Trophy. Indian women’s hockey team captain Savita Punia won the best goalkeeper of the year award. Dutch player Xan de Waard, meanwhile, won the FIH Women's Player of the Year honour. ABOUT FIH The Fédération Internationale de Hockey, commonly known by the acronym FIH, is the international governing body of field....Read More

Polar stratospheric clouds

Weather watchers have captured images of rare iridescent clouds over Scotland, northern England and the West Midlands. ABOUT THE PSC The Polar stratospheric clouds, also known as nacreous clouds, are among the rarest and most stunning atmospheric phenomena. These resemble mother of pearl, and usually develop in extremely cold air above the polar regions. Nacreous clouds are an indicator of especially cold air high in the atmosphere. They are best known for the beautiful pastel light they reflect after sunset and before sunrise. These clouds form over the polar regions and are made of smaller ice particles than those that....Read More

Ministry of Earth Sciences recently flagged off India’s first winter scientific expedition to the Arctic from the MoES headquarters in New Delhi. Indian scientific expeditions to the Arctic during the winter (November to March) will allow researchers to conduct unique scientific observations during polar nights, where there is no sunlight for nearly 24 hours and sub-zero temperatures (as low as -15 degrees Celsius). The first batch of the maiden Arctic winter expedition comprises researchers from the host NCPOR, Indian Institute of Technology (IIT) Mandi; Indian Institute of Tropical Meteorology (IITM), Pune; and Raman Research Institute, Bengaluru. This will aid in....Read More

Ibu volcano

The Ibu volcano on Halmahera Island in the eastern Indonesian province of North Maluku erupted recently, throwing ash up to 1,200 metre above its peak. Standing as high as around 1,300 metre above sea level, Ibu volcano is classified in the second danger level, below the highest level of IV. Located on the Pacific Ring of Fire, Indonesia is one of the countries with the most volcanoes in the world.Read More

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