气候变暖背景下青藏高原多年冻土层中地下冰作为水“源”的可能性探讨

Discussion on the Possibility of Taking Ground Ice in Permafrost Regions as Water Sources under Climate Warming

多年冻土中含有大量地下冰,全球气候变暖势必导致多年冻土退化,地下冰融化,部分水分被释放并参与到区域水循环之中,改变了区域水文状况.冻土退化-释水的过程在监测上面临较大困难,无法提供直接证据,但其长期累计的效果在宏观水文过程中表现显著.为此,利用近年来青藏高原部分湖泊水位变化监测以及地区水文情势变化研究成果,探讨了在气候变暖背景下,多年冻土层中的地下冰作为一种潜在水"源"的可能性.结果表明:多年冻土退化较强烈地区,补给源头在多年冻土区的封闭湖泊水位上涨、地下水位上升,排除其它补给量增加的可能性后,多年冻土地下冰很可能是补给水量增加的原因之一.

Large amount of ground ice are borne in permafrost regions on the Tibetan Plateau.Inevitably,the degradation of permafrost due to climate warming have led,is leading and will lead to the thawing of permafrost and melting of ground ice,releasing part of soil moisture.This part of soil moisture from melting ground ice enters the hydrological cycle at various spatio-temporal scales,changing regional hydrological regimes to various degrees.Although the cumulative effects of this released soil moisture could be ...