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

【ポルノ 映画 館 痴漢】Why the "imminent" Brunt iceberg hasn't cracked off yet

Back in February,ポルノ 映画 館 痴漢 the digital media feasted on the Brunt Ice Shelf, touting that a massive slab of ice — some two times the size of New York City — was supposedly poised to snap off into Antarctic waters.

An informative NASA press release with perhaps an overly-eager headline (noting a "countdown" to the event) no doubt stoked excitement among news sites about the ice shelf, which is the end or tongue of a glacier that floats over the ocean.

Yet, some nine months later, Brunt has still yet to calve, or break off, the looming iceberg. The event wasn't so imminent after all — as in impending in the approaching weeks or months. But no one need worry, for the potentially 615-square-mile iceberg will indeed crack off, eventually.


You May Also Like

"It's imminent on a glaciological time scale, how about that?" said Anna Hogg, a polar researcher specializing in satellite observations at the Institute for Atmospheric and Climate Science at the University of Leeds.

It's hard, if not impossible, to predict when an ice shelf will snap off and spawn an iceberg. Each ice shelf is different, as are the geologic features around and beneath it, as are local atmospheric and oceanic conditions.

"Predicting ice cracks on an ice shelf is almost like predicting when an earthquake is going to occur," said Hogg. Earthquakes can't be predicted.

You must know what's happening under the snow-blanketed surface to grasp how a crack is advancing, or not. "That's the $64,000 question," said Christopher Shuman, a glaciologist at the University of Maryland-Baltimore County and scientist at the NASA Goddard Space Flight Center, referencing the popular 1950s American game show The $64,000 Question.

Original image replaced with Mashable logoOriginal image has been replaced. Credit: Mashable

Satellites, using ground-penetrating radar, could eventually be used to see under the snow and look at how the crack is evolving, he said. For now, Shuman estimates that a big rift, dubbed "Chasm 1," has about 4 kilometers (2.5 miles) to go before connecting with another zone of cracks. Then, snap.

Clearly, it's getting close. And this crack is certainly capable of...quickly cracking. Between October 2018 and October 2019, Shuman estimates the rift advanced around 4.5 kilometers, or around 2.8 miles.

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!

For those rooting for the potentially Oklahoma City-sized iceberg, good news lies ahead. The Antarctic winter is over. Even with summer, the frigid landmass — whose lofty mountains are buried in ice up to their neckswill still be terribly cold. But, the added warmth may be enough to edge the crack onwards.

"That's the $64,000 question."

There are a lot of natural cards at play. Who knows what will happen. "It might hang on for another 20 years," Hogg mused, noting that it took some 20 years for the "loose tooth" on Antarctica's Amery Ice Shelf to finally bite the dust.

But for us humans, the real weighty question isn't whenmight the Brunt finally shed this iceberg, but what does it all mean?

As scientists have understood since the 1800s, carbon dioxide is a potent heat-trapping gas capable of heating the planet. Unfortunately, CO2 is now amassing in the atmosphere at historically and geologicallyunprecedented rates, meaning relentless, and ongoing, warming. Antarctica is still damn cold, but this warming has critical implications for the continent's ice sheets.

Original image replaced with Mashable logoOriginal image has been replaced. Credit: Mashable

Specifically, as the planet warms, wind patterns are changing around Antarctica. And these winds, called the polar westerlies, are now pushing warmer ocean waters into Antarctica's ice shelves. These relatively warm ocean waters are melting and eating awaythe ice from below. 

The consequences are significant. Overall, recent research suggests the ice-clad continent is losing more than six times as much icethan it was in the 1980s. Between 2009 and 2017, Antarctica lost 2.5 trillionmetric tons of ice. This means accumulating sea level rise.

The shedding of icebergs has been especially pronounced at the Pine Island Glacier in West Antarctica. "It's almost constant now," Shuman told me earlier this year, noting significant calving there in 2001, 2007, 2013, 2015, 2017, and 2018. Pine Island might spawn another berg before the year's through.

SEE ALSO: Worst reasons for Trump to quit the Paris climate pact, unranked

Prior to 2012, when this bout of large-scale cracking on Brunt began, the ice shelf had been stable since the 1950s, when The $64,000 Question was all the rage.Now, the ice shelf's stability is in question — at a time when other Antarctic ice shelves have increasingly calvedinto the ocean. It's possible this latest calving event is normal. Or, it could be yet another Antarctic area showing symptoms of instability.

It's too early to tell. "It remains to be seen," said Shuman.

When the new iceberg does break off of Brunt, it will definitely be large, yet not record-breaking. It probably won't crackthe top 20 largest-recorded Antarctic icebergs. 

But when it goes, scientists like Hogg and Shuman will be watching. There are a wealth of satellites now scouring the polar regions and Antarctica, a changing land that holds 90 percent of the planet's ice.

"It will be interesting to see what happens this [Antarctic] summer," said Hogg.

The looming southern summer, at least, is imminent.

0.1254s , 9865.828125 kb

Copyright © 2025 Powered by 【ポルノ 映画 館 痴漢】Why the "imminent" Brunt iceberg hasn't cracked off yet,Public Opinion Flash  

Sitemap

Top 主站蜘蛛池模板: 国产精品入口麻豆免费 | 国产成人无码精品一区二区三区 | A片免费观看一区二区三区 a片免费在线一区二区 | 2024国产高清最新资源 | 日韩人妻无码一本二本三本 | 亚洲精品久久久无码 | 久久夜色噜噜噜亚洲AV0000 | 高清不卡v免费费 | 红桃影院在线免费观看 | 亚洲成年人免费网站 | 伊人成综合网 | 精品无码一区专区国产 | 欧美变态另类z0z0禽交 | AV成人精品日韩一区 | 国产大陆亚洲精品国产 | 免费视频大片在线观看 | 片多多免费观看高清完整视频在线无码三区影院日本最新女 | 成人一区欧美高清夜夜片a 成人一区三区 | 日本无码人妻精品一区二区蜜桃 | 成人精品一区二区三区综合 | 亚洲中文字幕无码久久综合网 | 国产午夜精品在人线播放 | 2024国产麻豆剧传媒网站 | 亚洲日韩在线 | 色噜噜国产精品视频一区二区 | 伊人久久大香线蕉综合5g | 精品久久久久中文字幕一区 | 国内真实视频聊天一区 | 欧美日韩不卡合集视频 | 91免费视频在线观看欧美电影在线观看 | 中国另类丰满熟妇乱xxxxx | 黄色一级无码毛片高清视频 | 国产美女视频一区二区三区电影 | 国产91精品久久久天天 | 动漫成人无码精品一区二区三区 | 99久久国产综合精品五月天喷水 | 国产网曝门亚洲综合在线 | 国产午夜在线观看视频播放 | 日日艹夜夜艹 | 人妻aⅴ无码一区二区三区 人妻aⅴ无码中文字幕 | 久久国产一片免费观看 |