जलवायु परिवर्तन – Page 21 – आवारा मुसाफिर

Worsening thaw-spurred landslide curtails access to Alaska’s Denali park

April 26, 2022495 Views

For 50 years, visitors to Alaska's Denali National Park were ferried by shuttle buses along a 92-mile road to take in sweeping vistas, watch rambling bears, moose and caribou and gaze at the snowy flanks of North America's tallest peak. Not this year. This summer and next year, the park's sole road will remain closed at its halfway point, victim to a warming climate that has triggered the collapse of a mountain slope. The site, called Pretty Rocks, is at a high point on the unpaved road. Since last August, it has been considered unsafe for public travel. The landslide there used to be gradual and measured in inches per year, but it has accelerated dramatically, hastened by thawing of the underlying layers of once-perpetually frozen soil known as permafrost. FILE PHOTO: Geologi...

अमेरिकाजलवायु परिवर्तन

Breeding threatened coral species to restore reefs

AWARA MUSAFIR BUREAU

April 24, 2022931 Views

Scientists have successfully bred a threatened species of coral as part of a project that hopes to restore damaged reefs off the coast of Florida that are under threat by a relatively new disease, a coral rescue organization has said. Reefs in Florida and the Caribbean are facing growing threat of destruction by the Stony Coral Tissue Loss Disease that strips coral of its color and ultimately its life altogether. Baby rough cactus coral (Mycetophyllia ferox) is seen in a tank at the Florida Coral Rescue Center in this undated handout photo released by Seaworld. Seaworld/Handout via REUTERS The Florida Coral Rescue Center has in recent weeks bred hundreds of new coral of a species called rough cactus coral at a 2,000-square-foot (185.80-square-meter) facility that houses a total o...

जलवायु परिवर्तन

Deforestation drives climate change that harms remaining forest

AWARA MUSAFIR BUREAU

April 14, 20221222 Views

UCI researchers reconsider carbon storage with improved climate models, satellite data In a paper published in Nature Communications, a team led by scientists from the University of California, Irvine, using climate models and satellite data, reveal for the first time how protecting tropical forests can yield climate benefits that enhance carbon storage in nearby areas. Many climate scientists use computer simulations to mimic the planet’s climate as it exists today and how it may exist in the future as humanity keeps emitting greenhouse gases. Such models rely on accurate measurements all the moving parts of the climate system, from how much sunlight hits and warms the climate, to the response of forest biomass to changes in temperature, rainfall and atmospheric carbon dioxide leve...

जलवायु परिवर्तन

‘Now or never’: Only severe emissions cuts will avoid climate extremes

AWARA MUSAFIR BUREAU

April 4, 2022531 Views

UN IPCC releases last of its three part series report on Climate Change Drastic cuts to fossil fuel use. Growing forests and eating less meat. These are just some of the actions needed in this decade to contain global warming to 1.5 degrees Celsius above preindustrial temperatures, a major report by the U.N. climate science agency said Monday. Despite climate change warnings issued by the Intergovernmental Panel on Climate Change (IPCC) since 1990, global emissions have continued to rise in the last decade, reaching their highest point in history. The result: global emissions are on track to blow past the 1.5 degrees C warming limit envisioned in the 2015 Paris Agreement and reach some 3.2 degrees C by century's end. FILE PHOTO: People hold a balloon during a demonstration by ...

अंटार्कटिकाजलवायु परिवर्तन

World’s largest ice sheet is threatened

AWARA MUSAFIR BUREAU

April 1, 20221158 Views

Warmer summers and meltwater lakes are damaging the fringes A first-of-its-kind study looking at surface meltwater lakes around the East Antarctic Ice Sheet across a seven-year period has found that the area and volume of these lakes is highly variable year-to-year, and offers new insights into the potential impact of recent climatic change on the ‘Frozen Continent’. The research, led by Durham University (UK), used over 2000 satellite images from around the edge of the East Antarctic Ice Sheet to determine the size and volume of lakes on the ice surface, also known as supraglacial lakes, across seven consecutive years between 2014 and 2020. Meltwater lake near Shackleton Ice Shelf, East Antarctica. Photo: David Small, Durham University The study, which involved Newcastle and ...

जलवायु परिवर्तन

Birds are laying eggs earlier as climate change shifts springs

AWARA MUSAFIR BUREAU

March 27, 2022674 Views

Global warming is turning wildlife habits upside down The early bird is getting even earlier. With climate change spurring earlier springs across much of North America, many birds are laying their eggs earlier in the year, according to a new study – adding to mounting evidence that global warming is turning wildlife habits upside down. Of 72 bird species examined around Chicago, roughly a third lay their eggs about 25 days earlier than they did a century ago, researchers report in the paper published on Friday in the Journal of Animal Ecology. FILE PHOTO: A flock of blackbirds search for trees to perch on in the town on Hopkinsville, Kentucky. REUTERS/Harrison McClary Those affected include the mourning dove, American kestrel and Cooper's hawk. The scientists so far have...

जलवायु परिवर्तन

Tropical forests turn down the planet’s heat by 1C, scientists find

AWARA MUSAFIR BUREAU

March 24, 2022298 Views

Tropical forests cool the world by more than 1 degree Celsius, increase rainfall, and shield people and crops from deadly heat, researchers said, showing the climate benefits of trees go beyond sucking planet-warming carbon dioxide out of the air. In a new study released on Thursday, they outlined different ways the Earth, its climate and its inhabitants rely on forests. As every tenth of a degree of warming fuels threats from extreme weather and rising seas, lead author Deborah Lawrence said it is key to “acknowledge that tropical forests have a very important role in maintaining temperatures at a safe level”. Cutting down forests puts at risk the Paris climate accord’s goal of capping the rise in global average temperatures at “well below” 2C and ideally 1.5C above pre-indu...

आस्ट्रेलियाजलवायु परिवर्तन

Ocean warming threatens more frequent bleaching of Great Barrier Reef, report says

AWARA MUSAFIR BUREAU

March 21, 2022321 Views

Waters off Australia face more frequent and severe marine heatwaves that threaten the Great Barrier Reef, a report said on Monday, as a United Nations team began a visit to evaluate whether the World Heritage site should be listed as "in danger". The reef is at risk of another mass bleaching, following three in the past six years, as sea surface temperatures off the northeast coast of Australia have soared to as much as 2-4 degrees Celsius above average, Australian environmental group Climate Council said in the report. FILE PHOTO: A school of fish swim above a staghorn (Acropora cervicornis) coral colony as it grows on the Great Barrier Reef off the coast of Cairns, Australia October 25, 2019. REUTERS/Lucas Jackson The government's Great Barrier Reef Marine Park Authority last F...

जलवायु परिवर्तन

Fast-melting alpine permafrost may contribute to rising global temperatures

AWARA MUSAFIR BUREAU

March 15, 2022255 Views

Using lake sediment in the Tibetan Plateau, a team of researchers was able to show that permafrost at high elevations is more vulnerable than arctic permafrost under projected future climate conditions From the ancient sludge of lakebeds in Asia's Tibetan Plateau, scientists can decipher a vision of Earth's future. That future, it turns out, will look very similar to the mid-Pliocene warm period – an epoch 3.3 million to 3 million years ago when the average air temperature at mid-latitudes rarely dropped below freezing. It was a time when permanent ice was just beginning to cling to the northern polar regions, and mid-latitude alpine permafrost – or perpetually frozen soil – was much more limited than today. Global permafrost today contains a whopping 1,500 trillion grams of carbon....

जलवायु परिवर्तनयुगांडा

Climate crisis is making endangered mountain gorillas more thirsty

AWARA MUSAFIR BUREAU

March 12, 2022750 Views

Endangered mountain gorillas increase the frequency they drink water as the temperature increases, suggesting a likely impact of climate change on their behavior, finds a new study published in Frontiers in Conservation Science. Researchers used 10 years of data from observations on the only two existing mountain gorilla populations and found that both populations drank water significantly more often at higher average temperatures than cooler ones. The results have important implications for the behavior and conservation of mountain gorillas, which are faced with continued increases in temperature and frequency of extreme weather events due to the climate crisis. Mountain gorillas in Bwindi Impenetrable National Park in Uganda drinking water. Photo: Martha Robbins Mountain gorill...