Sensitivity and nonlinearity of Eurasian winter temperature response to recent Arctic sea ice loss

SUI Cuijuan; ZHANG Zhanhai; YU Lejiang; LI Yi; SONG Mirong

doi:10.1007/s13131-017-1018-y

欧亚大陆冬季温度对北极海冰减少的敏感性及非线性响应研究

doi: 10.1007/s13131-017-1018-y

1.
中国海洋大学海洋环境学院, 青岛, 266100, 中国;国家海洋环境预报中心, 北京, 100081, 中国
2.
中国海洋大学海洋环境学院, 青岛, 266100, 中国
3.
中国极地研究中心, 上海, 200129, China, 中国
4.
国家海洋环境预报中心, 北京, 100081, 中国
5.
中国科学院大气物理研究所, 北京, 100029, 中国

基金项目: The Chinese Polar Environment Comprehensive Investigation and Evaluation Programmes under contract No. CHINARE2016-04-04; the Public Science and Technology Research Funds Projects of Ocean under contract No. 201505013; the National Natural Science Foundation of China (NSFC) under contract No. 41576029.

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- 收稿日期: 2016-06-12

Sensitivity and nonlinearity of Eurasian winter temperature response to recent Arctic sea ice loss

1.
College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China;National Marine Environmental Forecasting Center, Beijing 100081, China
2.
College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China
3.
Polar Research Institute of China, Shanghai 200129, China
4.
National Marine Environmental Forecasting Center, Beijing 100081, China
5.
Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China

摘要

摘要: 近几年北极海冰快速融化，与之伴随的是欧洲冷冬频发。有研究表明北极海冰的减少会增加中高纬度冷冬或极端冷事件的发生，但模式在海冰减少的影响上却缺乏共识。利用CAM5（Community Atmosphere Model Version 5）模式，我们研究了欧亚大陆冷冬对大西洋扇区及太平洋扇区海冰融化的敏感性及非线性响应。结果表明：北极海冰减少可以通过增强西伯利亚高压、激发稳定Rossby波及减弱急流来影响大气环流，最终影响欧亚大陆降温。大西洋扇区冰融化可以引起1℃以上降温，太平洋扇区冰的融化引起的降温幅度小且位置更靠南。有趣的是如果大西洋扇区和太平洋扇区双侧融化在欧亚大陆并未引起明显降温，表明了大气对北极海冰减少的非线性响应。
- 冷冬 /
- CAM5 /
- 敏感性试验 /
- 急流
Abstract: The recent decline in the Arctic sea ice has coincided with more cold winters in Eurasia. It has been hypothesized that the Arctic sea ice loss is causing more mid-latitude cold extremes and cold winters, yet there is lack of consensus in modeling studies on the impact of Arctic sea ice loss. Here we conducted modeling experiments with Community Atmosphere Model Version 5 (CAM5) to investigate the sensitivity and linearity of Eurasian winter temperature response to the Atlantic sector and Pacific sector of the Arctic sea ice loss. Our experiments indicate that the Arctic sea ice reduction can significantly affect the atmospheric circulation by strengthening the Siberian High, exciting the stationary Rossby wave train, and weakening the polar jet stream, which in turn induce the cooling in Eurasia. The temperature decreases by more than 1℃ in response to the ice loss in the Atlantic sector and the cooling is less and more shifts southward in response to the ice loss in the Pacific sector. More interestingly, sea ice loss in the Atlantic and Pacific sectors together barely induces cold temperatures in Eurasia, suggesting the nonlinearity of the atmospheric response to the Arctic sea ice loss.
- cold winter /
- CAM5 /
- sensitivity experiment /
- jet stream

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参考文献(38)

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文章访问数: 937
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欧亚大陆冬季温度对北极海冰减少的敏感性及非线性响应研究

doi: 10.1007/s13131-017-1018-y

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Sensitivity and nonlinearity of Eurasian winter temperature response to recent Arctic sea ice loss

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