global warming – Page 10 – आवारा मुसाफिर

World could see 1.5C of warming in next five years, WMO reports

May 10, 2022388 Views

The world faces a 50% chance of warming of 1.5 degrees Celsius above pre-industrial levels, if only briefly, by 2026, the World Meteorological Organization (WMO) said on Monday. That does not mean the world would be crossing the long-term warming threshold of 1.5C (2.7 degrees Fahrenheit), which scientists have set as the ceiling for avoiding catastrophic climate change. But a year of warming at 1.5C could offer a taste of what crossing that long-term threshold would be like. "We are getting measurably closer to temporarily reaching the lower target of the Paris Agreement," said WMO Secretary-General Petteri Taalas, referring to climate accords adopted in 2015. The likelihood of exceeding 1.5C for a short period has been rising since 2015, with scientists in 2020 estimatin...

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Its getting tougher for glaciers to recover from climate warming

AWARA MUSAFIR BUREAU

May 10, 2022330 Views

A team of scientists from Stockholm University and University of California Irvine investigated whether the Petermann Ice Shelf in northern Greenland could recover from a future breakup due to climate change. They used a sophisticated computer model to simulate the potential recovery of the ice shelf. “Even if Earth’s climate stopped warming, it would be difficult to rebuild this ice shelf once it has fallen apart”, says Henning Åkesson, who led the study at Stockholm University. “If Petermann’s ice shelf is lost, we would have to go ‘back in time’ towards a cooler climate reminiscent of the period before the industrial revolution to regrow Petermann”, Åkesson says. A crack In Petermann Ice Shelf observed by an international team of scientists during the Oden Expedition in 2019. ...

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

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April 4, 2022512 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 ...

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World’s largest ice sheet is threatened

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April 1, 20221100 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 ...

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Birds are laying eggs earlier as climate change shifts springs

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March 27, 2022650 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...

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

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March 24, 2022276 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...

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U.S. fires four times larger, three times more frequent since 2000

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March 17, 2022704 Views

New analysis confirms a palpable change in fire dynamics already suspected by many Fires have gotten larger, more frequent and more widespread across the United States since 2000, according to a new University of Colorado Boulder-led paper. Recent wildfires have stoked concern that climate change is causing more extreme events, and the work published today in Science Advances shows that large fires have not only become more common, they are also spreading into new areas, impacting land that previously did not burn. “Projected changes in climate, fuel and ignitions suggest that we’ll see more and larger fires in the future. Our analyses show that those changes are already happening,” said Virginia Iglesias, a research scientist with CU Boulder’s Earth Lab and lead author of the paper...

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Fast-melting alpine permafrost may contribute to rising global temperatures

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March 15, 2022234 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....

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Climate crisis is making endangered mountain gorillas more thirsty

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March 12, 2022718 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...

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Caribbean coral reefs have been warming for at least 100 years

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March 10, 2022819 Views

Data also reveals increase in amount and length of reef-disrupting abnormal heatwave events A new analysis outlines 150 years of sea-surface temperature history throughout the Greater Caribbean region, highlighting significant warming trends that have disrupted coral reef ecosystems. Colleen Bove of the University of North Carolina at Chapel Hill and colleagues present these findings in the open-access journal PLOS Climate on March 9. In addition to heating the atmosphere, climate change caused by human activity heats the world’s oceans, disrupting marine ecosystems. Previous research has documented dramatic warming-induced changes to coral reef ecosystems worldwide—and in the Caribbean in particular—identifying such effects as mass coral mortality through coral bleaching and loss o...