globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2016JD025475
论文题名:
A comparison of the two Arctic atmospheric winter states observed during N-ICE2015 and SHEBA
作者: Graham R.M.; Rinke A.; Cohen L.; Hudson S.R.; Walden V.P.; Granskog M.A.; Dorn W.; Kayser M.; Maturilli M.
刊名: Journal of Geophysical Research: Atmospheres
出版年: 2017
卷: 122, 期:11
起始页码: 5716
结束页码: 5737
语种: 英语
英文关键词: Arctic winter states ; ERA-Interim ; mixed-phase clouds ; N-ICE2015 ; regional climate model ; SHEBA
英文摘要: Winter time atmospheric observations from the 2015 Norwegian young sea-ICE campaign (N-ICE2015) are compared with data from the 1997–1998 Surface Heat Budget of the Arctic (SHEBA) campaign. Both data sets have a bimodal distribution of the net longwave radiative flux for January–February, with modal values of −40 W m−2 and 0 W m−2. These values correspond to the radiatively clear and opaquely cloudy states, respectively, and are likely to be representative of the wider Arctic. The new N-ICE2015 observations demonstrate that the two winter states operate in the Atlantic sector of the Arctic and regions of thin sea ice. We compare the N-ICE2015 and SHEBA data with ERA-Interim and output from the coupled Arctic regional climate model HIRHAM-NAOSIM. ERA-Interim simulates two Arctic winter states well and captures the timing of transitions from one state to the other, despite underestimating the cloud liquid water path. HIRHAM-NAOSIM has more cloud liquid water compared with ERA-Interim but simulates the two states poorly. Our results demonstrate that models must simulate realistic synoptic forcing and temperature profiles to accurately capture the two Arctic winter states, and not only the presence of mixed-phase clouds. Using ERA-Interim, we find a positive trend in the number of opaquely cloudy days in the western Atlantic sector of the Arctic, and a strong correlation with the mean winter temperature over much of the Arctic Basin. Hence, the two Arctic winter states are important for understanding interannual variability in the Arctic. The N-ICE2015 data set will help improve our understanding of these relationships. ©2016. American Geophysical Union. All Rights Reserved.
资助项目: "The authors thank three anonymous reviewers for their helpful comments on how to improve this study. This work has been supported by the Norwegian Polar Institute's Centre for Ice, Climate and Ecosystems (ICE) through the N-ICE project. A.R. and W.D. acknowledge the support by the SFB/TR 172 “ArctiC Amplification: Climate Relevant Atmospheric and SurfaCe Processes, and Feedback Mechanisms (AC)3” in Project D03 funded by the Deutsche Forschungsgemeinschaft (DFG). This work has been further supported by the Helmholtz Climate Initiative REKLIM. V.P. Walden acknowledges support from the U.S.-Norway Fulbright Distinguished Arctic Chair Program and Washington State University. The work of Ines Hebestadt in conducting the HIRHAM-NAOSIM model simulations and providing the model output and ERA-I reanalysis is kindly acknowledged. We also thank all members of the N-ICE2015 team and the crew from R/V Lance for their help collecting and producing the N-ICE2015 data set. The HIRHAM-NAOSIM simulations were performed at the German Climate Computing Center (DKRZ, Hamburg) ; for data access, please contact Annette.Rinke@awi.de. The SHEBA data are available at https://data.eol.ucar.edu/dataset/list?project=73. The N-ICE2015 data are available through the Norwegian Polar Institutes Data Centre https://data.npolar.no.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62662
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Norwegian Polar Institute, Fram Centre, Tromsø, Norway; Helmholtz Centre for Polar and Marine Research, Alfred Wegener Institute, Potsdam, Germany; Department of Civil and Environmental Engineering, Washington State University, Pullman, WA, United States

Recommended Citation:
Graham R.M.,Rinke A.,Cohen L.,et al. A comparison of the two Arctic atmospheric winter states observed during N-ICE2015 and SHEBA[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(11)
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