气候变化领域集成服务门户(CCPortal): Impact of Arctic sea ice variations on winter temperature anomalies in northern hemispheric land areas

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DOI	10.1007/s00382-018-4305-1
	Impact of Arctic sea ice variations on winter temperature anomalies in northern hemispheric land areas
	Koenigk T.; Gao Y.; Gastineau G.; Keenlyside N.; Nakamura T.; Ogawa F.; Orsolini Y.; Semenov V.; Suo L.; Tian T.; Wang T.; Wettstein J.J.; Yang S.
发表日期	2019
ISSN	0930-7575
起始页码	3111
结束页码	3137
卷号	52 期号:2020-05-06
英文摘要	Coordinated numerical ensemble experiments with six different state-of-the-art atmosphere models have been used in order to evaluate the respective impact of the observed Arctic sea ice and sea surface temperature (SST) variations on air temperature variations in mid and high latitude land areas. Two sets of experiments have been designed; in the first set (EXP1), observed daily sea ice concentration and SST variations are used as lower boundary forcing over 1982–2014 while in the second set (EXP2) the SST variations are replaced by the daily SST climatology. The observed winter 2 m air temperature (T2m) variations are relatively well reproduced in a number of mid and high latitude land areas in EXP1, with best agreement in southwestern North America and northern Europe. Sea ice variations are important for the interannual T2m variations in northern Europe but have limited impact on all other mid and high latitude land regions. In particular, sea ice variations do not contribute to the observed opposite variations in the Arctic and mid latitude in our model experiments. The spread across ensemble members is large and many ensemble members are required to reproduce the observed T2m variations over northern Europe in our models. The amplitude of T2m anomalies in the coldest observed winters over northern Europe is not reproduced by our multi-model ensemble means. However, the sea ice conditions in these respective winters and mainly the thermodynamic response to the ice anomalies lead to an enhanced likelihood for occurrence of colder than normal winters and extremely cold winters. Still, the main reason for the observed extreme cold winters is internal atmospheric dynamics. The coldest simulated northern European winters in EXP1 and EXP2 between 1982 and 2014 show the same large scale T2m and atmospheric circulation anomaly patterns as the observed coldest winters, indicating that the models are well able to reproduce the processes, which cause these cold anomalies. The results are robust across all six models used in this study. © 2018, The Author(s).
语种	英语
scopus关键词	air temperature; atmosphere-ice-ocean system; atmospheric modeling; boundary layer; climate modeling; Northern Hemisphere; sea ice; sea surface temperature; temperature anomaly; thermodynamics; weather forecasting; winter; Arctic Ocean; North America; Northern Europe
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146442
作者单位	Swedish Meteorological and Hydrological Institute, Norrköping, Sweden; Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden; Nansen Environmental and Remote Sensing Center, Bergen, Norway; Bjerknes Centre for Climate Research, Bergen, Norway; Nansen-Zhu International Research Center, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; UPMC/CNRS/IRD/MNHN, LOCEAN/IPSL, Sorbonne Universités, Paris, France; Geophysical Institute, University of Bergen, Bergen, Norway; Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Japan; NILU, Norwegian Institute for Air Research, Kjeller, Norway; A.M. Obukhov Institute of Atmospheric Physics RAS, Moscow, Russian Federation; Institute of Geography RAS, Moscow, Russian Federation; Danish Meteorological Institute, Copenhagen, Denmark; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, United States
推荐引用方式 GB/T 7714	Koenigk T.,Gao Y.,Gastineau G.,et al. Impact of Arctic sea ice variations on winter temperature anomalies in northern hemispheric land areas[J],2019,52(2020-05-06).
APA	Koenigk T..,Gao Y..,Gastineau G..,Keenlyside N..,Nakamura T..,...&Yang S..(2019).Impact of Arctic sea ice variations on winter temperature anomalies in northern hemispheric land areas.Climate Dynamics,52(2020-05-06).
MLA	Koenigk T.,et al."Impact of Arctic sea ice variations on winter temperature anomalies in northern hemispheric land areas".Climate Dynamics 52.2020-05-06(2019).