sea ice – आवारा मुसाफिर

Antarctic ice levels undergo ‘massive decrease’, data shows

July 10, 2023690 Views

Antarctic sea ice levels reached record lows last month, the World Meteorological Organization (WMO) said on Monday, a development climate change experts described as worrisome. WMO said that Antarctic sea ice levels last month - the hottest June ever recorded -- were at their lowest since satellite observations began, at 17% below average. The Thwaites Glacier in Antarctica is seen in this undated NASA image. REUTERS/NASA/Handout via Reuters "We're used to seeing these big reductions in sea ice in the Arctic, but not in the Antarctic. This is a massive decrease," Michael Sparrow, Chief of World Climate Research Programme, told reporters in Geneva. Global sea surface temperatures were at record high for the time of the year in May and June, according to WMO, which warned that ...

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Record low sea ice cover in the Antarctic

AWARA MUSAFIR BUREAU

February 11, 2023811 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...

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Isolated Greenland polar bear population adapts to climate change

AWARA MUSAFIR BUREAU

June 18, 2022309 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...

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Solar energy explains fast yearly retreat of Antarctica’s sea ice

AWARA MUSAFIR BUREAU

March 29, 2022539 Views

In the Southern Hemisphere, the ice cover around Antarctica gradually expands from March to October each year. During this time the total ice area increases by 6 times to become larger than Russia. The sea ice then retreats at a faster pace, most dramatically around December, when Antarctica experiences constant daylight. New research led by the University of Washington explains why the ice retreats so quickly: Unlike other aspects of its behavior, Antarctic sea ice is just following simple rules of physics. The study was published March 28 in Nature Geoscience. A research vessel in Antarctica on June 3, 2017, the first day researchers saw the sun rise above the horizon after weeks of polar darkness. New research shows that solar radiation drives the relatively fast annual retrea...