<tt id="6hsgl"><pre id="6hsgl"><pre id="6hsgl"></pre></pre></tt>
          <nav id="6hsgl"><th id="6hsgl"></th></nav>
          国产免费网站看v片元遮挡,一亚洲一区二区中文字幕,波多野结衣一区二区免费视频,天天色综网,久久综合给合久久狠狠狠,男人的天堂av一二三区,午夜福利看片在线观看,亚洲中文字幕在线无码一区二区

          Science and Health

          Iceberg move reveals secrets of marine life

          By Pauline Askin (China Daily)
          Updated: 2011-04-18 08:04
          Large Medium Small

          Iceberg move reveals secrets of marine life

          SYDNEY - An iceberg's crash into an Antarctic glacier last year cracked off a huge swathe of ice, bringing to light a vast span of the Southern Ocean and providing scientists with a chance to conduct experiments that may help understand climate change.

          The incident, in which the iceberg clipped the Mertz Glacier in East Antarctica and broke off nearly 78 kilometer of glacier tongue, exposed a section of ocean water previously covered in hundreds of meters of ice and brought to light marine life including sea stars as big as hubcaps.

          "Suddenly the geometry of Antarctica has changed," said Steve Rintoul, an oceanographer with the Antarctic Climate and Ecosystems Cooperative Research Centre at the Commonwealth Scientific and Industrial Research Organisation (CSIRO) in Tasmania.

          "It was a sort of natural experiment, where the calving of the glacier tongue was not caused by climate change. This is a natural event, so nature has done the experiment for us this time."

          A team of 40 Australian and international scientists, including Rintoul, visited the region during the Antarctic summer to study the impact of the calving.

          Among the unanticipated biological results was the release of about 10,000 square meters of ice into the ocean when it drifted off into warmer water.

          Its consequent melting decreased water salinity and sparked an intense bloom of phytoplankton. The plants need light and nutrients to grow, along with small amounts of iron, which usually comes as dust falling from the sky.

          "The old ice had accumulated decades of iron dust supply, and when it broke off and melted seems to have provided the phytoplankton with between 20 and 40 years' dose of iron in a single season," Rintoul said.

          Another side effect, combined with clearer water, was the exposure of sea animals including giant seastars, colorful sponges and feathery sea pens, revealed after decades in dark Antarctic waters.

          Overall, researchers ended up with an unprecedented chance to test theories of how the marine ecosystem might respond to such large-scale changes, a possible foretaste of what could lie ahead with climate change.

          "Some of the areas we sampled have been under ice for many decades so no ship has ever reached that area," Rintoul added.

          Reuters

          分享按鈕
          主站蜘蛛池模板: 日韩国产成人精品视频| 中文无码乱人伦中文视频在线| 国产肉丝袜在线观看| 中文字幕人妻无码一区二区三区| 97中文字幕在线观看| 久久精品人人做人人爽电影蜜月| 久久精品不卡一区二区| 一本一本久久a久久精品综合| 你懂的亚洲一区二区三区| 国产无遮挡吃胸膜奶免费看| 国产精品一起草在线观看| 国产亚洲国产精品二区| 国内自拍小视频在线看| 日日躁狠狠躁狠狠爱| www.一区二区三区在线 | 中国| 精品国偷自产在线视频99| 欧美牲交a免费| 亚洲精品日韩久久精品| 久草热8精品视频在线观看| 国产成人高清亚洲一区二区| 国产午夜精品理论大片| 午夜福利日本一区二区无码| 被黑人伦流澡到高潮HNP动漫| 夜色福利站WWW国产在线视频| 日韩欧美不卡一卡二卡3卡四卡2021免费 | 国产精品色一区二区三区| 久久精品国产亚洲av成人| 亚洲精品乱码在线观看| 欧美黑人巨大videos精品| 涩欲国产一区二区三区四区| 亚洲国产中文字幕在线视频综合| 国产精品女在线观看| 久久不卡精品| 少妇高潮喷潮久久久影院| 欧美一区二区三区在线可观看| 国产边摸边吃奶边叫做激情视频| 无码人妻一区二区三区av| 日韩精品亚洲专在线电影| 色偷偷久久一区二区三区| 四虎在线成人免费观看| 亚洲中文在线视频|