THE AMUNDSEN SEA LOW Variability, Change, and Impact on Antarctic Climate
THE AMUNDSEN SEA LOW Variability, Change, and Impact on Antarctic Climate
复制标题
DOI：
10.1175/bams-d-14-00018.1
复制
发表时间：
2016-01-01
影响因子：
8
通讯作者：
Hobbs, W. R.
中科院分区：
文献类型：
--
作者：
Raphael, M. N.;Marshall, G. J.;Hobbs, W. R.
阿蒙森海低压（ASL）是一个对西南极气候有重要影响的气候低压中心。它有可能解释最近南极气候的重要变化，例如温度和海冰范围的变化，这意味着它已成为越来越多研究的重点。在这里，作者总结了目前对ASL的理解，使用再分析数据集分析最近的变化和趋势，以及冰芯化学和气候模型预测，分别检查ASL的过去和未来变化。近几十年来，ASL加深，通过影响区域纬向风场影响气候，该风场控制着进入大陆的水汽和热量的平流。春季ASL加深与观测到的西南极变暖和罗斯海海冰范围扩大相一致。近几十年的气候模式模拟表明，这种加深是由热带变率介导的，而气候模式对21世纪世纪的预测表明，在某些季节，由于温室气体浓度的增加，ASL将加深。
The Amundsen Sea low (ASL) is a climatological low pressure center that exerts considerable influence on the climate of West Antarctica. Its potential to explain important recent changes in Antarctic climate, for example, in temperature and sea ice extent, means that it has become the focus of an increasing number of studies. Here, the authors summarize the current understanding of the ASL, using reanalysis datasets to analyze recent variability and trends, as well as ice-core chemistry and climate model projections, to examine past and future changes in the ASL, respectively. The ASL has deepened in recent decades, affecting the climate through its influence on the regional meridional wind field, which controls the advection of moisture and heat into the continent. Deepening of the ASL in spring is consistent with observed West Antarctic warming and greater sea ice extent in the Ross Sea. Climate model simulations for recent decades indicate that this deepening is mediated by tropical variability while climate model projections through the twenty-first century suggest that the ASL will deepen in some seasons in response to greenhouse gas concentration increases.