
A swath of Antarctica's sea ice larger than four times the size of France has melted since 2014, AFP reported Tuesday.
The rapid decline, revealed in a study of satellite data published by the Proceedings of the National Academy of Sciences, marks a stunning reversal for the South Pole: Between 1979 and 2014, its sea ice was actually expanding. Then, it lost 2.1 million square kilometers (approximately 810,815 square miles) in three years, falling from 12.8 million square kilometers (approximately 4.9 million square miles) to 10.7 million square kilometers (approximately 4.1 million square miles).
"It went from its 40-year high in 2014, all the way down in 2017 to its 40-year low," study author and NASA Goddard Space Flight Center climatologist Claire Parkinson told AFP.
That also means that Antarctica rapidly caught up with the fast-melting Arctic. In four years, it lost as much sea ice as the Arctic lost in 34, The Guardian reported.
“The plunge in the average annual extent means Antarctica lost as much sea ice in four years as the Arctic lost in 34 years.”
— Greta Thunberg (@GretaThunberg) July 1, 2019
#ClimateBreakdown #ClimateEmergency https://t.co/tMiTCkKURO
Scientists are still uncertain if the melting trend will continue or reverse again, and whether the climate crisis is to blame.
Parkinson told New Scientist that there was a similar rapid melt period in the 1970s followed by an expansion of ice, and the ice did begin to increase again between 2017 and 2018 before dipping to a new low record low for this time of year.
Sea ice in the Antarctic responds to more than just global temperature, as British Antarctic Survey sea ice expert Kaitlin Naughten told The Guardian.
"Westerly winds which surround the continent mean that Antarctic sea ice doesn't respond directly to global warming averaged over the whole planet," Naughten explained. "Climate change is affecting the winds, but so is the ozone hole and short-term cycles like El Niño. The sea ice is also affected by meltwater running off from the Antarctic ice sheet. Until 2014, the total effect of all these factors was for Antarctic sea ice to expand. But in 2014, something flipped, and the sea ice has since declined dramatically. Now scientists are trying to figure out exactly why this happened."
New study reveals sharp decline in #Antarctic #seaice since 2014. BAS researcher @kaitlinnaughten comments in today's @guardian https://t.co/cFgDSuOl2v @dpcarrington pic.twitter.com/W45AkkzDr7
— Antarctic Survey (@BAS_News) July 2, 2019
But even if the melting isn't caused by climate change, it could make it worse. That's because the bright white of sea ice reflects 50 to 70 percent of sunlight back into space, Parkinson told CNN. Dark ocean water, on the other hand, absorbs 90 percent of that light.
"The rapid decline has caught us by surprise and changes the picture completely. Now sea ice is retreating in both hemispheres and that presents a challenge because it could mean further warming." Leeds University professor Andrew Shepherd told The Guardian.
Sea ice loss does not contribute directly to sea level rise, but it does displace the wildlife that depends on the ice.
"Sea ice also affects the polar ecosystem, including penguins and whales and seals, petrels and albatrosses, krill, and a whole range of additional animals and marine plant life," Parkinson told CNN.
#Antarctic Melting Increased 6x in the Past 40 Years https://t.co/kFsO8bY8mZ @ClimateReality @350
— EcoWatch (@EcoWatch) January 16, 2019
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By Brett Wilkins
Accusing California regulators of "reckless disregard" for public "health and safety," the environmental advocacy group Center for Biological Diversity on Wednesday sued the administration of Gov. Gavin Newsom for approving thousands of oil and gas drilling and fracking projects without the required environmental review.
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By Kate Whiting
From Greta Thunberg to Sir David Attenborough, the headline-grabbing climate change activists and environmentalists of today are predominantly white. But like many areas of society, those whose voices are heard most often are not necessarily representative of the whole.
1. Wangari Maathai
<p>In 2004, Professor Maathai made history as the <a href="https://www.nobelpeaceprize.org/Prize-winners/Prizewinner-documentation/Wangari-Maathai" target="_blank" rel="noopener noreferrer">first African woman to be awarded the Nobel Peace Prize</a> for her dedication to sustainable development, democracy and peace. She started the <a href="http://www.greenbeltmovement.org/" target="_blank" rel="noopener noreferrer">Green Belt Movement</a>, a community-based tree planting initiative that aims to reduce poverty and encourage conservation, in 1977. More than 51 million trees have been planted helping build climate resilience and empower communities, especially women and girls. Her environmental work is celebrated every year on <a href="http://www.greenbeltmovement.org/node/955" target="_blank" rel="noopener noreferrer">Wangari Maathai Day on 3 March</a>.</p>2. Robert Bullard
<p>Known as the 'father of environmental justice,' Dr Bullard has <a href="https://www.unep.org/championsofearth/laureates/2020/robert-bullard" target="_blank">campaigned against harmful waste</a> being dumped in predominantly Black neighborhoods in the southern states of the U.S. since the 1970s. His first book, Dumping in Dixie, highlighted the link between systemic racism and environmental oppression, showing how the descendants of slaves were exposed to higher-than-average levels of pollutants. In 1994, his work led to the signing of the <a href="https://www.nrdc.org/experts/albert-huang/20th-anniversary-president-clintons-executive-order-12898-environmental-justice" target="_blank">Executive Order on Environmental Justice</a>, which the <a href="https://www.whitehouse.gov/briefing-room/presidential-actions/2021/01/27/executive-order-on-tackling-the-climate-crisis-at-home-and-abroad/" target="_blank">Biden administration is building on</a>.<br></p><span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="7983f54726debdd824f97f9ad3bdbb87"><iframe lazy-loadable="true" src="https://www.youtube.com/embed/T_VjSGk8s18?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
Pollution has a race problem. Elizabethwarren.com
3. John Francis
<p>Helping the clean-up operation after an oil spill in San Francisco Bay in January 1971 inspired Francis to <a href="https://planetwalk.org/about-john/" target="_blank" rel="noopener noreferrer">stop taking motorized transport</a>. Instead, for 22 years, he walked everywhere. He also took a vow of silence that lasted 17 years, so he could listen to others. He has walked the width of the U.S. and sailed and walked through South America, earning the nickname "Planetwalker," and raising awareness of how interconnected people are with the environment.</p><span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="09b968e0e9964e31406954dcea45981d"><iframe lazy-loadable="true" src="https://www.youtube.com/embed/vgQjL23_FoU?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
4. Dr. Warren Washington
<p>A meteorology and climate pioneer, Dr. Washington was one of the first people to develop atmospheric computer models in the 1960s, which have helped scientists understand climate change. These models now also incorporate the oceans and sea ice, surface water and vegetation. In 2007, the <a href="https://www.cgd.ucar.edu/pcm/" target="_blank" rel="noopener noreferrer">Parallel Climate Model (PCM)</a> and <a href="https://www.cesm.ucar.edu/" target="_blank" rel="noopener noreferrer">Community Earth System Model (CESM)</a>, earned Dr. Washington and his colleagues the <a href="https://www.nobelprize.org/prizes/peace/2007/summary/" target="_blank" rel="noopener noreferrer">Nobel Peace Prize</a>, as part of the <a href="https://www.ipcc.ch/" target="_blank" rel="noopener noreferrer">Intergovernmental Panel on Climate Change</a>.</p><span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="09fbf6dc37f275f438a0d53ec0fe1874"><iframe lazy-loadable="true" src="https://www.youtube.com/embed/bvJ4jTy2mTk?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
5. Angelou Ezeilo
<p>Huge trees and hikes to pick berries during her childhood in upstate New York inspired Ezeilo to become an environmentalist and set up the <a href="https://gyfoundation.org/staff/Angelou-Ezeilo" target="_blank" rel="noopener noreferrer">Greening Youth Foundation</a>, to educate future generations about the importance of preservation. Through its schools program and Youth Conservation Corps, the social enterprise provides access to nature to disadvantaged children and young people in the U.S. and West Africa. In 2019, Ezeilo published her book <em>Engage, Connect, Protect: Empowering Diverse Youth as Environmental Leaders</em>, co-written by her Pulitzer Prize-winning brother Nick Chiles.</p><span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="ce4547d4e5c0b9ad2927f19fd75bf4ab"><iframe lazy-loadable="true" src="https://www.youtube.com/embed/YojKMfUvJMs?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
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