The Quelccaya ice Cap, the largest body of ice in the tropics, feeds the streams and rivers of the valleys below.

凯尔·卡亚冰帽是热带地区最大的冰川体，它为下游山谷的溪湾和河流提供了水源。

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He said that further warming could trigger polar ice cap melting.

他说进一步的变暖可能触发极地冰帽融化。

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A small ice cap on top of Eyjafjallajokull has promoted such shenanigans.

艾雅法拉火山顶的小冰帽促成了这些恶作剧。

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Increased evaporation from the exposed sea should also mean more snowfall to compensate for the ice cap's losses (though together with rapid erosion at the margins this could increase the gradient of the ice cap, making it less stable.) But this is small consolation for another big fear: rapid thawing of the Arctic permafrost.

ECONOMIST: The science

They spend most of their time on sea ice, this cap of ice that is floating around on the surface of the Arctic Ocean.

CNN: Polar bear now listed as 'threatened' species

But the volume of the Martian north polar cap is less than half that of the Greenland ice cap, and about four percent of the Antarctic ice sheet.

BBC: By BBC News Online Science Editor Dr David Whitehouse