摘要
本文通过CAM6-Nor大气环流模式模拟实验研究热带海表温度在1979-2013年北极对流层增温中的贡献.分析结果表明热带海表温度变化可以解释历史模拟实验中的秋季和1月增温的30%-40%.这意味着热带海表温度可能是1979年至2013年间北极冬季对流层变暖的主要驱动因素之一.除了1月份850hPa以下的北极增温,热带海表温度的影响通常来自热带中东部太平洋,热带印度-西太平洋和热带大西洋的联合作用.对1月份850hPa以下的北极增温的影响主要来自热带印度-西太平洋.
The contribution of the tropical sea surface temperature in the Arctic tropospheric warming during 1979-2013 was studied through simulations using the CAM6-Nor atmospheric general circulation model.Results showed that the tropical sea surface temperature explained about 30%-40%of the autumn warming and the January warming in the historical simulation.This implies that the tropical sea surface temperature could have been one of the main drivers of Arctic winter tropospheric warming between 1979 and 2013.The tropical sea surface temperature impacts generally came from a combination of the effects of the tropical central-eastern Pacific,the tropical Indo-western Pacific,and the tropical Atlantic,except for the January warming below 850 hPa,which was dominated by the tropical Indo-western Pacific impacts.
基金
the Research Council of Norway through the project COMBINED[grant number 328935]
the contribution of Professor Yongqi Gao(1965-2021)to the design of the experiments
The CAM6-Nor simulations were performed on resources provided by UNINETT Sigma2—the National Infrastructure for High Performance Computing and Data Storage in Norway(nn2343k,NS9015K).
关键词
热带海表温度
北极气候变化
北极对流层变暖
遥相关
Tropical sea surface temperature
Arctic climate change
Arctic troposphericwarming
Teleconnections
