The intraseasonal variability of winter semester surface air temperature in Antarctica

Polar research

Mingyu Zhou¹  Hsiaoming Hsu²  Zhanhai Zhang³  Lejiang Yu⁴  Zhiqiu Gao⁵  Junmei Ban⁶  Shiyuan Zhong⁷  Huiding Wu⁷  Bo Sun⁸ 

[1] Polar Research Institute of China 451 Jinqiao RoadPu Dong200136ShanghaiPeople's Republic of China Correspondence;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences100029BeijingPeople's Republic of China;Technology 219 Ningliu Road, Nanjing210044JiangsuPeople's Republic of China;Applied Hydrometeorological Research Institute, Nanjing University of Information Science &Michigan State University 208 Geography BuildingEast LansingMI48824USA;National Center for Atmospheric Research PO Box 3000BoulderCO 80307-3000USA;Polar Research Institute of China 451 Jinqiao RoadPu Dong200136ShanghaiPeople's Republic of China;Polar Research Institute of China 451 Jinqiao RoadPu Dong200136ShanghaiPeople's Republic of China;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences100029BeijingPeople's Republic of China

关键词: Antarctic climate;    surface air temperature;    intraseasonal variability;    Antarctic Oscillation;   

DOI  :  10.3402/polar.v30i0.6039

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

This study investigates systematically the intraseasonal variability of surface air temperature over Antarctica by applying empirical orthogonal function (EOF) analysis to the National Centers for Environmental Prediction, US Department of Energy, Reanalysis 2 data set for the period of 1979 through 2007. The results reveal the existence of two major intraseasonal oscillations of surface temperature with periods of 26–30 days and 14 days during the Antarctic winter season in the region south of 60°S. The first EOF mode shows a nearly uniform spatial pattern in Antarctica and the Southern Ocean associated with the Antarctic Oscillation. The mode-1 intraseasonal variability of the surface temperature leads that of upper atmosphere by one day with the largest correlation at 300-hPa level geopotential heights. The intraseasonal variability of the mode-1 EOF is closely related to the variations of surface net longwave radiation the total cloud cover over Antarctica. The other major EOF modes reveal the existen...

【 授权许可】

CC BY-NC