Set as Homepage - Add to Favorites

日韩欧美成人一区二区三区免费-日韩欧美成人免费中文字幕-日韩欧美成人免费观看-日韩欧美成人免-日韩欧美不卡一区-日韩欧美爱情中文字幕在线

【?? ??? ??】Scientists just excavated an unprecedented specimen from Antarctica

At an extremely remote Antarctic outpost,?? ??? ?? scientists have unearthed a pristine sample of our planet's history.

It's an ice core 2,800 meters, or some 1.7 miles, long. But it's not just the length that's so significant. The ice contains preserved pockets of Earth's air from some 1.2 million years ago, if not more. Previous ice cores provided direct evidence of our planet's climate and environment from up to 800,000 years ago.

So, this is a giant leap. The team drilled so deep they reached the continent's bedrock.


You May Also Like

"We have marked a historic moment for climate and environmental science," Carlo Barbante, a polar scientist and coordinator of the ice core campaign called "Beyond EPICA - Oldest Ice," said in a statement.

SEE ALSO: If a scary asteroid will actually strike Earth, here's how you'll know

An international group of researchers excavated the ice at Little Dome C Field Camp in Antarctica, located 10,607 feet (3,233 meters) above sea level. They beamed radar down into the subsurface and used computer modeling of the ice flow to determine where this ancient ice was likely to be. And they were right.

Mashable Light Speed Want more out-of-this world tech, space and science stories? Sign up for Mashable's weekly Light Speed newsletter. By clicking Sign Me Up, you confirm you are 16+ and agree to our Terms of Use and Privacy Policy. Thanks for signing up!

This was no easy feat. Atop the Antarctic plateau, summers average minus-35 degrees Celsius, or minus-31 degrees Fahrenheit.

The location of Little Dome C research base in Antarctica.The location of Little Dome C research base in Antarctica. Credit: Beyond EPICA / EU Ice core drilled from the recent Beyond EPICA - Oldest Ice expedition. Ice core drilled from the recent Beyond EPICA - Oldest Ice expedition. Credit: Scoto © PNRA / IPEV

Although paleoclimatologists, who research Earth's past climate, have reliable methods of indirectly gauging our planet's deep past — with proxies such as fossilized shells and compounds produced by algae — direct evidence, via direct air, is scientifically invaluable. For example, past ice cores have revealed that the heat-trapping carbon dioxide levels in Earth's atmosphere today have skyrocketed — they're the highest they've been in some 800,000 years. It's incontrovertible evidence of Earth's past.

Scientists expect this even older ice core, however, will reveal secrets about a period called the Mid-Pleistocene Transition, lasting some 900,000 to 1.2 million years ago. Mysteriously, the intervals between glacial cycles — wherein ice sheets expanded over much of the continents and then retreated — slowed down markedly, from 41,000 years to 100,000 years.

"The reasons behind this shift remain one of climate science's enduring mysteries, which this project aims to unravel," the drilling campaign, which was coordinated by the Institute of Polar Sciences of the National Research Council of Italy, said in a statement.

Now, the drilling is over. But the campaign to safely transport the ice back to laboratories, and then scrutinize this over-million-year-old atmosphere, has begun.

"The precious ice cores extracted during this campaign will be transported back to Europe on board the icebreaker Laura Bassi, maintaining the minus-50 degrees Celsius cold chain, a significant challenge for the logistics of the project," explained Gianluca Bianchi Fasani, the head of ENEA (National Agency for New Technologies, Energy, and Sustainable Economic Development) logistics for the Beyond EPICA expedition.

These historic ice cores will travel in "specialized cold containers" as they ship across the globe, far from the depths of their Antarctic home.

0.1675s , 9829.1875 kb

Copyright © 2025 Powered by 【?? ??? ??】Scientists just excavated an unprecedented specimen from Antarctica,Public Opinion Flash  

Sitemap

Top 主站蜘蛛池模板: 国产欧美动漫日韩在线一区二区三区 | 中文字幕乱码人妻无码久久 | av片在线播放免费 | 欧洲无人区天空码头IV在哪在线 | 99色色蝌蚪 | 国产美女裸舞一区二区 | 久久人妻熟女中文字幕AV蜜芽 | 欧洲亚洲国产成人综合色婷婷 | 久久久久久久精品伊人影院 | 欧美三级不卡在线观看视频 | 欧洲国产成人精品91软件 | 国产又黄又硬又湿又黄的A片小说 | 麻豆精品久久久久久久99蜜桃 | 波多野办公室激情A片 | 国产精品无码一区二区三区免费 | 精品欧美一区二区三区在线观看 | 免费三级网站 | 日韩精品少妇视频网 | 国产成人av一区二区三区在 | A片女女女女女女BBBB | 无码人妻精品一区二区三区不卡 | 国产aⅴ激情无码久久久无码 | 日韩精品无码人妻免费视频 | 日韩国产精品人妻无码久久久 | 久久这里只精品国产免费9 久久这里只精品热在线99 | 美女裸身照(无内衣)动态图 | 人妻制服丝袜有码中文字幕 | 97色婷婷 | 国产精品欧美一区二区三区不卡 | 卡一卡二卡三专区免费 | 波多野结衣高清av | 粉嫩小泬丝袜无套内射久久久 | 极品少妇xxxx精品少妇 | 精品人妻少妇人成在线 | 日韩在线1 | 亚洲国产精品久久精品成人网站 | 国产中文字幕在线观 | 久久精品国产亚洲av三区 | 少妇内射高潮福利炮 | 国产swag在线观看 | 国产精品一区二区69 |