जलवायु परिवर्तन – Page 13 – आवारा मुसाफिर

New cause of melting Antarctic ice shelves identified

December 23, 2022428 Views

Existing conservation efforts insufficient to protect Antarctic ecosystems Researchers have discovered a process that can contribute to the melting of ice shelves in the Antarctic. An international team of scientists found that adjacent ice shelves play a role in causing instability in others downstream. The study, led by the University of East Anglia in the UK, also identified that a small ocean gyre - a system of circulating ocean currents - next to the Thwaites Ice Shelf can impact the amount of glacial-meltwater flowing beneath it. When that gyre is weaker, more warm water can access the areas beneath the ice shelf, causing it to melt. Meanwhile, another study says that existing conservation efforts are insufficient to protect Antarctic ecosystems, and population declines are...

जलवायु परिवर्तन

Palau’s Rock Islands harbor heat-resistant corals

AWARA MUSAFIR BUREAU

December 23, 2022534 Views

Finding could help reef managers to develop new defenses against ocean warming Ocean warming is driving an increase in the frequency and severity of marine heatwaves, causing untold damage to coral reefs. Tropical corals, which live in symbiosis with tiny single celled algae, are sensitive to high temperatures, and exhibit a stress response called bleaching when the ocean gets too hot. In the last 4 decades, marine heatwaves have caused widespread bleaching, and killed millions of corals. Because of this, a global search is underway for reefs that can withstand the heat stress, survive future warming, and act as sources of heat-tolerant coral larvae to replenish affected areas both naturally and through restoration. Now, scientists studying reefs in Palau, an archipelago in th...

खबरनामाघटनाएंजलवायु परिवर्तन

Rainforest-rich nations ensure COP15 deal on nature sticks

AWARA MUSAFIR BUREAU

December 20, 2022471 Views

Target to protect 30% of nature on Earth by 2030 A United Nations summit approved on Monday a landmark global deal to protect nature and direct billions of dollars toward conservation but objections from key African nations, home to large tracts of tropical rainforest, held up its final passage. The Kunming-Montreal Global Biodiversity Framework, reflecting the joint leadership of China and Canada, is the culmination of four years of work toward creating an agreement to guide global conservation efforts through 2030. There was widespread support for the final text put forward after two weeks of UN biodiversity negotiations to agree this decade’s targets for protecting nature, which included protecting 30% of the planet for nature by the end of the decade, reforming $500bn (£410bn...

आस्ट्रेलियाखबरनामाघटनाएंजलवायु परिवर्तन

Scientists freeze Great Barrier Reef coral in world-first trial

AWARA MUSAFIR BUREAU

December 19, 2022910 Views

Scientists working on Australia's Great Barrier Reef have successfully trialled a new method for freezing and storing coral larvae they say could eventually help rewild reefs threatened by climate change. Scientists are scrambling to protect coral reefs as rising ocean temperatures destabilise delicate ecosystems. The Great Barrier Reef has suffered four bleaching events in the last seven years including the first ever bleach during a La Nina phenomenon, which typically brings cooler temperatures. FILE PHOTO: Reef fish swim above recovering coral colonies on the Great Barrier Reef off the coast of Cairns, Australia October 25, 2019. REUTERS/Lucas Jackson Cryogenically frozen coral can be stored and later reintroduced to the wild but the current process requires sophisticated equi...

जलवायु परिवर्तन

Glacier melting linked to shifting westerlies and likely to accelerate

AWARA MUSAFIR BUREAU

December 15, 2022831 Views

The combination of global atmospheric warming and westerly winds shifting toward the poles will likely speed up the recession of mountain glaciers in both hemispheres, according to a UMaine study. Mountain glaciers freeze and gain mass when the climate cools, and melt and lose mass when the climate warms. The extent to which the fluctuations in mountain glaciers are reflective of local, regional and even hemispheric climate variations, however, is less clear, which has made it more difficult for scientists to use glacial data to interpret past climate dynamics and make predictions for the future. A team of researchers from the University of Maine conducted a National Science Foundation-funded study evaluating how atmospheric conditions are reflected in the mass fluctuations of m...

जलवायु परिवर्तनलद्दाख

Ladakh herders endeavor to save future on climate frontier

AWARA MUSAFIR BUREAU

December 14, 2022989 Views

Nomad Tsering Angchuk vows to stay put in his remote village in India’s Ladakh region. His two sons and most of his fellow villagers have migrated to a nearby urban settlement but Angchuk is determined to herd his flock of fine cashmere-producing goats in the treeless Kharnak village, a hauntingly beautiful but unforgiving, cold mountainous desert. Dolma Angmo, wife of nomad Tsering Angchuk, attends her hardy Himalayan goats that produce cashmere in the remote Kharnak village in the cold desert region of Ladakh, India, Sunday, Sept. 17, 2022. (AP Photo/Mukhtar Khan) The 47-year-old herds 800 sheep and goats and a flock of 50 Himalayan yaks in Kharnak. In 2013, he migrated to Kharnakling, an urban settlement in the outskirts of a regional town called Leh but returned a year later,...

जलवायु परिवर्तन

Limiting global warming now can preserve valuable freshwater resource

AWARA MUSAFIR BUREAU

November 29, 2022226 Views

Study highlights wide-scale carbon mitigation strategies to maintain snowpack throughout Americas Snowcapped mountains not only look majestic – They’re vital to a delicate ecosystem that has existed for tens of thousands of years. Mountain water runoff and snowmelt flows down to streams, rivers, lakes, and oceans – and today, around a quarter of the world depends on these natural “water towers” to replenish downstream reservoirs and groundwater aquifers for urban water supplies, agricultural irrigation, and ecosystem support. But this valuable freshwater resource is in danger of disappearing. The planet is now around 1.1 degrees Celsius (1.9 degrees Fahrenheit) warmer than pre-industrial levels, and mountain snowpacks are shrinking. Last year, a study co-led by Alan Rhoades and ...

जलवायु परिवर्तन

Few mangrove species likely to reduce and shift landward

AWARA MUSAFIR BUREAU

November 15, 2022428 Views

Decline in habitat to impact mangroves in east coast and west coast of India Certain mangrove species in Chilika and Sundarbans along the east coast and Dwarka and Porbandar along the west coast of India is likely to reduce and shift landward by 2070 due to decline in suitable habitats in response to precipitation and sea level changes, said a study based on a prediction model. The study can help identify highly suitable areas for conservation and management and develop conservation strategies for the future. Mangroves support numerous ecosystem services and help reduce coastal ecological risks, yet they are one of the severely endangered ecosystems declining rapidly due to climate change, sea level fluctuations, and human activities. A limited understanding of mangrove spatial ...

कनाडाजलवायु परिवर्तन

Climate reshapes life for tenacious gannets on Quebec isle

AWARA MUSAFIR BUREAU

November 13, 2022314 Views

On Quebec’s Bonaventure Island, the ghosts of human habitation from years past and the birds that breed there now in extraordinary numbers tell the same story: of lives lived hard in a place of fairy-tale beauty. You see this from the tender ages on the family gravestones of islanders who scratched out a living from the late 1700s to when Bonaventure went entirely to the birds a half century ago. A northern gannet flies above the colony on Bonaventure Island in the Gulf of St. Lawrence off the coast of Quebec, Canada's Gaspe Peninsula, Tuesday, Sept. 13, 2022. (AP Photo/Carolyn Kaster) You see it from the tenacious colony of 100,000-plus northern gannets as they plunge into the sea for prey, soar back to their nests and fight at the least provocation, sometimes to the death, for ...

जलवायु परिवर्तनमिस्र

Saving Egypt’s coral reefs is necessary to preserve oceans’ ecosystems

AWARA MUSAFIR BUREAU

November 12, 2022845 Views

Marine scientists’ letter in the journal Science urges preservation of one of the last coral refuges from climate change An international group of marine scientists led by Karine Kleinhaus, of Stony Brook University’s School of Marine and Atmospheric Sciences (SoMAS), has published a letter in Science that is a call to action for policy makers, government agencies and ocean conservation groups to take major steps to preserve Egypt’s 1800 km of coral reefs– a massive section of the Red Sea’s reef system. Egypt’s reefs generate billions of dollars annually from tourism and tourism-related commerce. The reefs of the northern Red Sea are especially valuable as they constitute one of the world’s few marine refuges from climate change. Almost the entire western coastline of this ref...