极地研究

极地研究 ›› 2015, Vol. 27 ›› Issue (3): 229-236.DOI: 10.13679/j.jdyj.2015.3.229

• 研究论文 •    下一篇

PISM冰盖模式对Amery冰架流速场模拟的适用性

季青原1 王帮兵1 孙波2   

  1. 1 浙江大学地球科学系，浙江 杭州 310027； 2 中国极地研究中心，上海 200136
  • 收稿日期:2014-02-25 修回日期:2014-04-24 出版日期:2015-09-30 发布日期:2015-09-30
  • 通讯作者: 王帮兵
  • 基金资助:

    国家自然科学基金;国家863项目;国家973项目

APPLICABILITY PISM FOR VELOCITY ANALYSIS OF THE AMERY ICE SHELF, EAST ANTARCTICA

Ji Qingyuan1, Wang Bangbing1, Sun Bo2   

  1. 1 Department of Earth Science, Zhejiang University, Hangzhou 310027, China; 2 Polar Researth Institute of China, Shanghai 200136, China
  • Received:2014-02-25 Revised:2014-04-24 Online:2015-09-30 Published:2015-09-30

PDF (PC)

1021

被引次数

1

摘要： 在全球气候变暖的背景下，冰架系统是监视和预测冰盖稳定性的理想研究区域。然而传统的冰架观测与调查方法只能从某一侧面揭示冰架的运动状态和演化信息，也无法预测其未来变化；冰盖模式作为非常有潜力的数值计算方法，成为研究和预测冰盖/冰架演化的热点领域。Lambert冰川—Amery冰架系统是东南极冰盖最大的冰川系统，对于研究东南极冰盖的物质平衡和冰盖稳定性具有重要意义。使用PISM冰盖模式，对该冰川系统的流动过程进行模拟，得到冰表面流速场数据。并将模拟流速场与实测数据进行对比，发现两者在大部分区域吻合较好，但在冰架前缘处呈现出一些差异。进一步讨论了差异可能的来源以及模拟可以改进的地方。

关键词: Amery冰架, 有限差分模型, PISM模式, 流速场分析

Abstract: In the context of global climate change, ice shelf systems have become critically important for accessing ice sheet stability. Conventionally, measurement-based approaches are limited in addressing ice sheet motion and evolution. Ice sheet modeling provides a valuable and effective tool to study the dynamics and evolution of ice shelves. The Lambert-Amery ice shelf system, the largest glacier system in East Antarctica, and a vital part in researching the mass balance and stability of East Antarctica Ice Sheet, is studied with the PISM ice sheet model. We simulate the surface ice velocity field of this glacier system and compare the model result with actual measurement by remote sensing. The comparison indicates that the model performs well in predicting the velocity field across the Amery Ice Shelf. We further discuss the prospect of applying ice sheet model in research on the evolution of ice sheets and ice caps.

Key words: Amery Ice Shelf, finite difference model, PISM, velocity field analysis