DH-GAP04 borehole hydraulic head, 2011 to 2018, Greenland

The 650 m long proglacial bedrock borehole DH-GAP04 is angled under the Greenland Ice Sheet and is the only bedrock borehole in the Arctic providing deep groundwater information...总长650米的冰前基岩钻孔（proglacial bedrock borehole）DH-GAP04以倾斜角度布设于格陵兰冰盖下方，是北极地区唯一可提供深层地下水信息的基岩钻孔……