जलवायु परिवर्तन – Page 12 – आवारा मुसाफिर

Record low sea ice cover in the Antarctic

February 11, 2023931 Views

Sea ice extent in the Southern Ocean now the lowest since the beginning of satellite observation forty years ago There is currently less sea ice in the Antarctic than at any time in the forty years since the beginning of satellite observation: in early February 2023, only 2.20 million square kilometres of the Southern Ocean were covered with sea ice. Researchers from the Alfred Wegener Institute and the University of Bremen analyse the situation for the Sea Ice Portal. January 2023 had already set a new record for its monthly mean extent (3.22 million square kilometres), even though the melting phase in the Southern Hemisphere continues until the end of February. The current expedition team on board RV Polarstern has just reported virtually ice-free conditions in its current research...

जलवायु परिवर्तन

New ice core analysis shows sharp Greenland warming spike

AWARA MUSAFIR BUREAU

January 20, 20231057 Views

A sharp spike in Greenland temperatures since 1995 showed the giant northern island 2.7 degrees (1.5 degrees Celsius) hotter than its 20th-century average, the warmest in more than 1,000 years, according to new ice core data. Until now Greenland ice cores -- a glimpse into long-running temperatures before thermometers -- hadn’t shown much of a clear signal of global warming on the remotest north central part of the island, at least compared to the rest of the world. But the ice cores also hadn’t been updated since 1995. Newly analyzed cores, drilled in 2011, show a dramatic rise in temperature in the previous 15 years, according to a study in Wednesday’s journal Nature. “We keep on (seeing) rising temperatures between 1990s and 2011,” said study lead author Maria Hoerhold, a glaciol...

जलवायु परिवर्तन

Moving species emerges as last resort as climate warms

AWARA MUSAFIR BUREAU

January 20, 2023755 Views

In a desperate effort to save a seabird species in Hawaii from rising ocean waters, scientists are moving chicks to a new island hundreds of miles away. Moving species to save them — once considered taboo — is quickly gaining traction as climate change upends habitats. Similar relocations are being suggested for birds, lizards, butterflies and even flowers. Concerns persist that the novel practice could cause unintended harm the same way invasive plants and animals have wreaked havoc on native species. In this photo provided by the Pacific Rim Conservation, wildlife workers relocate Tristram’s storm petrels on Hawaii’s Tern Island, on March 29, 2022. (L. Young/Pacific Rim Conservation via AP) But for the Tristram’s storm petrels on northeastern Hawaii’s Tern Island, which is j...

जलवायु परिवर्तनब्राजील

Climate change likely to uproot more Amazon trees

AWARA MUSAFIR BUREAU

January 18, 20231123 Views

New study connecting extreme thunderstorms and tree deaths suggests the tropics will see more major blowdown events in a warming world Tropical forests are crucial for sucking up carbon dioxide from the atmosphere. But they’re also subject to intense storms that can cause “windthrow” – the uprooting or breaking of trees. These downed trees decompose, potentially turning a forest from a carbon sink into a carbon source. Members of NGEE-Tropics visit what they named “Blowdown Gardens,” an area that experienced windthrow near one of their field sites in the Amazon. Photo Credit: Jeff Chambers/Berkeley Lab A new study finds that more extreme thunderstorms from climate change will likely cause a greater number of large windthrow events in the Amazon rainforest. This is one of the fe...

जलवायु परिवर्तन

Last year tied as world’s fifth-warmest on record, scientists say

AWARA MUSAFIR BUREAU

January 14, 2023736 Views

Last year was the world's joint fifth-warmest on record and the last nine years were the nine warmest since pre-industrial times, putting the 2015 Paris Agreement's goal to limit global warming to 1.5C in serious jeopardy, U.S. scientists have said. Last year tied with 2015 as the fifth-warmest year since record-keeping began in 1880, NASA said. That was despite the presence of the La Nina weather pattern in the Pacific Ocean, which generally lowers global temperatures slightly. The world's average global temperature is now 1.1C to 1.2C higher than in pre-industrial times. FILE PHOTO: The sun rises behind the London skyline as a second heatwave is predicted for parts of the country, Richmond Park, London, Britain, August 8, 2022. REUTERS/Toby Melville The U.S. National Oceanic...

जलवायु परिवर्तन

Vulnerability, resilience, and hopeful potential in world’s tallest trees

AWARA MUSAFIR BUREAU

January 12, 20231045 Views

Redwoods and Climate Change Scientists from Cal Poly Humboldt conducted a rangewide analysis of coast redwood (Sequoia sempervirens) to examine growth trends and understand how these trees are responding to recent environmental changes. They found that redwoods have varying sensitivity to drought, and that rising temperatures may affect tree performance in unexpected ways—results that are both concerning and hopeful. Coastal fog helps alleviate drought stress. Nighttime fog, in particular, is one of the best predictors of redwood growth efficiency. Phot Credit: (Courtesy of Steve Sillett) The study, published in Forest Ecology and Management, was led by Cal Poly Humboldt Forestry Professor Stephen C. Sillett, the Kenneth L. Fisher Chair in Redwood Forest Ecology. Sillett’s team w...

जलवायु परिवर्तन

‘Feels like summer’: Warm winter breaks temperature records in Europe

AWARA MUSAFIR BUREAU

January 5, 2023147 Views

Record-high winter temperatures swept across parts of Europe over the new year, bringing calls from activists for faster action against climate change while offering short-term respite to governments struggling with high gas prices. Hundreds of sites have seen temperature records smashed in the past days, from Switzerland to Poland to Hungary, which registered its warmest Christmas Eve in Budapest and saw temperatures climb to 18.9 degrees Celsius (66.02°F) on Jan. 1. In France, where the night of Dec. 30-31 was the warmest since records began, temperatures climbed to nearly 25C in the southwest on New Year's Day while normally bustling European ski resorts were deserted due to a lack of snow. A cable car is seen on mountain Jahorina in Sarajevo, Bosnia and Herzegovina January 4,...

जलवायु परिवर्तनस्विट्जरलैंड

Skiing over Christmas holidays no longer guaranteed – even with snow guns

AWARA MUSAFIR BUREAU

December 29, 2022773 Views

For many people, holidays in the snow are as much a part of the end of the year as Christmas trees and fireworks. As global warming progresses, however, white slopes are becoming increasingly rare. Researchers at the University of Basel have calculated how well one of Switzerland’s largest ski resorts will remain snow reliable with technical snowmaking by the year 2100, and how much water this snow will consume. The future for ski sports in Switzerland looks anything but rosy – or rather white. Current climate models predict that there will be more precipitation in winter in the coming decades, but that it will fall as rain instead of snow. Despite this, one investor recently spent several million Swiss francs on expanding the Andermatt-Sedrun-Disentis ski resort. A short-sighted decis...

चीनजलवायु परिवर्तन

Uneven wetting affecting Tibetan Plateau

AWARA MUSAFIR BUREAU

December 27, 2022843 Views

Climate change is causing diverse variations in the thawing of frozen ground The Tibetan Plateau has experienced prominent warming and wetting since the mid-1990s that has altered the thermal and hydrological properties of its frozen ground. In a new study, published in Advances in Atmospheric Sciences, scientists used the Community Land Surface Model to uncover that the dual effect of this wetting and the projected increase in precipitation over the Tibetan Plateau in the future is becoming a critical factor in determining the thermodynamics of the frozen ground. The lead author of the study, Dr Xuewei Fang from the School of Atmospheric Sciences at Chengdu University of Information Technology in China, explains that “In the face of the greatest increase in the occurrence frequ...

जलवायु परिवर्तनमोरक्को

Climate change threatens centuries-old oases in Morocco

AWARA MUSAFIR BUREAU

December 26, 2022917 Views

Residents of the oasis of Alnif say they can’t remember a drought this bad: The land is dry. Some wells are empty. Palm groves that date back more than 100 years are barren. Home to centuries-old oases that have been a trademark of Morocco, this region about 170 miles southeast of Marrakesh is reeling from the effects of climate change, which has created an emergency for the kingdom’s agriculture. Nomadic herders guide their sheep in search for food to graze near Tinghir, Morocco, Monday, Nov. 28, 2022. (AP Photo/Mosa'ab Elshamy) Among those affected is Hammou Ben Ady, a nomad in the Tinghir region who leads his flock of sheep and goats in search of grazing grass. The drought forced him to rely on government handouts of fodder. November is usually a cold, wet month in Alnif, b...