HUANG Aonan,SONG Chentao,CHEN Keyi,et al.Tropical Atlantic Warming Induced Winter Sea Ice Changes around the West Antarctica in Recent Three Decades[J].Journal of Chengdu University of Information Technology,2021,36(02):190-197.[doi:10.16836/j.cnki.jcuit.2021.02.011]
近三十年以来热带大西洋增温对南极西部冬季海冰变化的影响
- Title:
- Tropical Atlantic Warming Induced Winter Sea Ice Changes around the West Antarctica in Recent Three Decades
- 文章编号:
- 2096-1618(2021)02-0190-08
- Keywords:
- meteorology; Polar climate change; Antarctic sea ice; sea surface temperature; tropical-Antarctic teleconnection
- 分类号:
- P461+.2
- 文献标志码:
- A
- 摘要:
- 1979-2015年,南极西部冬季海冰存在明显的长期趋势,主要表现为罗斯海海冰增多,而阿蒙森海和别林高斯晋海海冰减少。为了研究造成海冰再分布过程的影响原因,采用了一组不同复杂程度的大气模式以及地球系统模式,模拟热带大西洋升温对南半球大气环流的影响,并结合观测数据统计分析结果,最后使用耦合模式直接模拟了热带大西洋的增温趋势对南极西部海冰的强迫作用。研究结果显示两者具有因果关系。热带大西洋升温会激发大尺度准定常罗斯贝波影响南半球大气环流,加深阿蒙森低压。阿蒙森低压的加深通过影响表面风场进一步造成南极西部地区海冰的偶极型变化。鉴于南极海冰对于深海环流的驱动至关重要,此研究将有助于加深并完善当前对于全球气候变化及年代际变率机制的理解。
- Abstract:
- From 1979 to 2015, there was a redistribution of winter sea ice in the Antarctic. The sea ice increased in the Ross Sea and decreased in the Amundsen and Bellinsgauzen Seas. In order to study the cause of the sea ice redistribution process, a set of atmospheric models and earth system models with different degrees of complexity were used to simulate the effect of tropical Atlantic warming on the southern hemisphere atmospheric circulation. Combined with the statistical analysis results of observation data, The coupled model was finally used directly to simulate the forcing effect of the warming trend of the tropical Atlantic Ocean on sea ice in the western Antarctic. The research results show that the two have a causal relationship. The warming of the tropical Atlantic will stimulate large-scale quasi-stationary Rossby waves to affect the atmospheric circulation in the southern hemisphere and deepen the Amundsen low pressure. The deepening of the Amundsen low pressure further caused the dipole change of sea ice in the western Antarctic by affecting the surface wind field. Given that Antarctic sea ice is essential for driving the deep ocean circulation, this study will help deepen and improve the current understanding of global climate change and interdecadal variability mechanisms.
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备注/Memo
收稿日期:2020-03-31基金项目:国家自然科学基金资助项目(41676190)