Increased export of grounded ice after the collapse of northern Larsen ice shelf, Antarctic Peninsula, observed by Envisat ASAR
Increased export of grounded ice after the collapse of northern Larsen ice shelf, Antarctic Peninsula, observed by Envisat ASAR
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Envisat ASAR 观测到南极半岛拉森冰架北部崩塌后接地冰出口增加
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
T. Nagler
中科院分区：
文献类型：
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作者：
H. Rott;W. Rack;T. Nagler
利用Envisat ASAR卫星雷达图像数据的时间序列研究了南极半岛拉森冰架北方冰架和冰川的退缩情况，直至2007年3月。在2002年3月的解体事件后，拉森B的小的剩余冰架部分的面积进一步减少。地面冰川的退缩也在继续。自2004年以来，拉森B以上的冰川速度进一步增加，但加速度小于2002年崩溃后的头两年。在冰川开始崩解直接流入海洋后，冰的出口迅速增加。由于冰架解体部分上方的地面冰的排放，海平面上升的贡献约占目前冰川和冰盖对海平面上升贡献的6%。
Time series of satellite radar image data of Envisat ASAR were used to study the retreat of ice shelves and glaciers at northern Larsen Ice Shelf,Antarctic Peninsula, up to March 2007. After the disintegration event in March 2002, the small remaining ice shelf section of Larsen B decreased further in area. The retreat of grounded glacier ice continued also. The glacier velocities above previous Larsen B increased further since 2004, but the acceleration has been smaller than in the first two years after the collapse in 2002. Ice export increased rapidly after the glaciers started to calve directly into the ocean. The sea level contribution due to discharge of grounded ice above the disintegrated ice shelf sections amounts to about 6% of the present glacier and ice sheet contribution to sea level rise.