Did the Antarctic ice sheets expand during the early Pliocene
Did the Antarctic ice sheets expand during the early Pliocene
复制标题
上新世早期南极冰盖是否扩张
DOI：
--
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
P. Bart
中科院分区：
文献类型：
--
作者：
P. Bart
地震资料表明，冰川不整合面位于南极大陆架的下上新世地层中。冰川不整合非常重要，因为它们提供了直接证据，表明尽管上新世早期大部分时间气候普遍变暖，海平面上升，但南极冰盖仍在前进。高峰低洼和18o富集的大小表明，南极洲的冰量可能超过今天的冰量约18%，这表明在上新世早期，冰架上的冰盖接地事件可能与2至3次比现在更大的冰量有关。
Seismic data show that glacial unconformities are located within lower Pliocene strata on the Antarctic continental shelves. The glacial unconformities are significant because they provide direct evidence that the Antarctic ice sheets advanced despite the generally warmer climates and elevated sea levels that characterized most of the early Pliocene. The magnitudes of peak eustatic lowstands and 18 O enrichments indicate that the ice volume on Antarctica may have exceeded today9s ice volume by approximately 18%, which suggests that the ice-sheet grounding events on the shelves probably were associated with larger than present ice volumes on two to three occasions during the early Pliocene.