जलवायु परिवर्तन – Page 19 – आवारा मुसाफिर

Polar bears scavenge on garbage to cope with climate change

July 20, 2022310 Views

Hungry polar bears are turning to garbage dumps to fill their stomachs as their icy habitat disappears. On Wednesday, a team of Canadian and U.S. scientists warned that trash poses an emerging threat to already-vulnerable polar bear populations as the animals become more reliant on landfills near northern communities. This is leading to deadly conflicts with people, the report published in the journal Oryx said. Polar bears scavenge for food at a dump in Churchill, Canada, in this handout image dated circa 2003. In 2005, the community permanently closed its dump and now stores garbage in a secure facility. Dan Guravich/Polar Bears International/Handout via REUTERS "Bears and garbage are a bad association," said co-author Andrew Derocher, a biologist at the University of Alberta. ...

क्यूबाजलवायु परिवर्तन

Cuban sea turtles can’t escape climate change, even on these far-flung beaches

AWARA MUSAFIR BUREAU

July 13, 2022961 Views

On Cuba's far-flung Guanahacabibes peninsula, park guard Roberto Varela watches as a green sea turtle lumbers ashore and a ritual as old as the dinosaurs unfolds. "To see them lay their eggs and to know their nests will be protected, you get the sense you are making a difference," said Varela, who helps oversee turtle research in a national park that spans much of the peninsula. So far, efforts by Varela and fellow researchers at the park and University of Havana have been a success. Turtle nesting here, once threatened by poaching, has stabilized and increased in some cases, published studies show, even as it has fallen off elsewhere in the tropics. A green sea turtle returns to the sea after laying eggs on the beach in Guanahacabibes Peninsula, Cuba, June 28, 2022. REUTERS/Alex...

जलवायु परिवर्तन

Arctic temperatures are increasing four times faster than global warming

AWARA MUSAFIR BUREAU

July 6, 2022599 Views

Analysis of observed temperatures finds two jumps over the past 50 years that were missed by most climate models A new analysis of observed temperatures shows the Arctic is heating up more than four times faster than the rate of global warming. The trend has stepped upward steeply twice in the last 50 years, a finding missed by all but four of 39 climate models. “Thirty years is considered the minimum to represent climate change,” said Petr Chylek, a physicist and climate researcher at Los Alamos National Laboratory and lead author of the study in Geophysical Research Letters. “We decreased the time interval to 21 years. At that smaller time scale and, contrary to previous investigations that found the Arctic amplification index increases in a smooth way, we observed two distinct st...

जलवायु परिवर्तन

Top predators could ‘trap’ themselves trying to adapt to climate change, study shows

AWARA MUSAFIR BUREAU

June 29, 2022216 Views

As climate change alters environments across the globe, scientists have discovered that in response, many species are shifting the timing of major life events, such as reproduction. With an earlier spring thaw, for example, some flowers bloom sooner. But scientists don’t know whether making these significant changes in life history will ultimately help a species survive or lead to bigger problems. A study published the week of June 27 in the Proceedings of the National Academy of Sciences shows for the first time that a species of large carnivore has made a major change to its life history in response to a changing climate — and may be worse off for it. An African wild dog mother and pup. Photo: Bobby-Jo Vial A team led by researchers at the University of Washington, in collabora...

जलवायु परिवर्तन

Climate change is driving 2022 extreme heat and flooding

AWARA MUSAFIR BUREAU

June 28, 2022797 Views

Extreme weather events – from scorching heatwaves to unusually heavy downpours – have caused widespread upheaval across the globe this year, with thousands of people killed and millions more displaced. In the last three months, monsoon rains unleashed disastrous flooding in Bangladesh, and brutal heatwaves seared parts of South Asia and Europe. Meanwhile, prolonged drought has left millions on the brink of famine in East Africa. Much of this, scientists say, is what's expected from climate change. Trees burn as flames and smoke engulf the top of a hill in a forest fire in Artazu, northern Spain in the early hours of Sunday, June 19, 2022. (AP Photo/Miguel Oses) On Tuesday, a team of climate scientists published a study in the journal Environmental Research: Climate. The resear...

जलवायु परिवर्तन

Climate change is turning more of Central Asia into desert

AWARA MUSAFIR BUREAU

June 22, 2022349 Views

The rapid expansion will have significant impacts on ecosystems and the people and animals who rely on them As global temperatures rise, desert climates have spread north by up to 100 kilometres in parts of Central Asia since the 1980s, a climate assessment reveals1. The study, published on 27 May in Geophysical Research Letters, also found that over the past 35 years, temperatures have increased across all of Central Asia, which includes parts of China, Uzbekistan and Kyrgyzstan. In the same period, mountain regions have become hotter and wetter — which might have accelerated the retreat of some major glaciers. Such changes threaten ecosystems and those who rely on them, says Jeffrey Dukes, an ecologist at the Carnegie Institution for Science’s Department of Global Ecology in St...

जलवायु परिवर्तनफ्रांस

Scientists probe link between ‘snow blood’ and climate change

AWARA MUSAFIR BUREAU

June 21, 2022909 Views

Standing on a snowy mountainside about 2,500 metres above sea level, Eric Marechal holds up a crimson test-tube. Inside is an algae sample known as "snow blood," a phenomenon that accelerates Alpine thaw and that scientists worry is spreading. "These algae are green. But when it's in the snow, it accumulates a little pigment like sunscreen to protect itself," said Marechal, research director at Grenoble's Scientific Research National Center, who was collecting laboratory samples on Le Brevent mountain with teammates. Alberto Amato, Ludovic Gielly and Jade Ezzedine of the Cell and Plant Physiology Laboratory of Grenoble take samples of the Sanguina nivaloides algae, also known as "snow blood" and which presence accelerates snowmelt at the Brevent in Chamonix, France, June 14, 2022. R...

जलवायु परिवर्तन

Isolated Greenland polar bear population adapts to climate change

AWARA MUSAFIR BUREAU

June 18, 2022344 Views

An isolated population of polar bears in Greenland has made a clever adaptation to the decline in the sea ice they depend upon as a platform for hunting seals, offering a ray of hope for this species in at least some locales in the warming Arctic. This population of several hundred bears, inhabiting part of Greenland's southeast coast on the Denmark Strait, has survived with only abbreviated access to ice formed from frozen seawater by hunting instead from chunks of freshwater ice breaking off from the huge Greenland Ice Sheet, researchers said on Thursday. Three adult polar bears in southeast Greenland using the sea ice during the limited time when it is available in this region in this handout photograph taken in April 2015. Kristin Laidre/University of Washington/Handout via REUT...

चिलीजलवायु परिवर्तन

Now a Chilean lake turns to desert

AWARA MUSAFIR BUREAU

June 14, 2022505 Views

Locals beg God for water, sounding climate change alarm The Penuelas reservoir in central Chile was until twenty years ago the main source of water for the city of Valparaiso, holding enough water for 38,000 Olympic-size swimming pools. Water for only two pools now remains. A huge expanse of dried and cracked earth that was once the lake bed is littered with fish skeletons and desperate animals searching for water. A general view of the former Penuelas lake in Valparaiso, Chile April 19, 2022. A huge expanse of dried and cracked earth that was once the lake bed is littered with fish skeletons and desperate animals searching for water. Picture taken with drone. REUTERS/Ivan Alvarado Amid an historic 13-year drought, rainfall levels have slumped in this South American nation tha...

इराकजलवायु परिवर्तन

Iraq’s ‘pearl of the south’ Lake Sawa dry amid water crisis

AWARA MUSAFIR BUREAU

June 13, 20221069 Views

Hussam al-Aqouli remembers the exact spot along southern Iraq’s Lake Sawa where his two daughters once dipped their feet into clear waters. Now he stands there two years on and the barren earth cracks beneath him. This year, for the first time in its centuries-long history, the lake dried up. A combination of mismanagement by local investors, government neglect and climate change has ground down its azure shores to chunks of salt. Lake Sawa is only the latest casualty in this broad country-wide struggle with water shortages that experts say is induced by climate change, including record low rainfall and back-to-back drought. The stress on water resources is driving up competition for the precious resource among businessmen, farmers and herders, with the poorest Iraqis counting among...