The difference with this scenario is that no additional bacterial action is needed, only warming of the sea environment, as the methane is already present in it's frozen, clathrate form.

这种情况的不同之处是，由于甲烷目前是以冷冻，包合物的形式存在，不需要有额外的细菌作用，只要海洋环境变暖就可释放出来。

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Add to this the estimated tens of millions of cubic meters of frozen methane sequestered beneath (warming) Arctic sea beds, and you can begin to see why all the renewed concern.

如果再加上北极海床下面(升温中)被隔离的大约数千万立方米冻结甲烷，你就可以明白为什么人们重新关注甲烷。

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Russia, Canada and Denmark, prompted in part by years of warming and the ice retreat this year, ratcheted up rhetoric and actions aimed at securing sea routes and seabed resources.

俄罗斯、加拿大和丹麦，促使部分今年年的变暖，冰撤退，加大言辞和行动旨在保障海上航线和海底资源。

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Climate researchers say this decrease in sea ice a symptom of a warming climate, caused largely by the combustion of carbon-rich fossil fuels.

CNN: Ice floe halts Shell's new Arctic well

This warming is causing glaciers and ice shelves to melt, releasing large volumes of fresh water into the oceans which not only raises sea level, but also influences regional climate change.

BBC: Polar expedition to study Antarctica's climate history