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Influences of Summertime Arctic Dipole Atmospheric Circulation on Sea Ice Concentration Variations in the Pacific Sector of the Arctic during Different Pacific Decadal Oscillation Phases

文献类型：期刊论文

作者Bi, Haibo3,4,5; Wang, Yunhe3,4,5; Liang, Yu3,4,5; Sun, Weifu2; Liang, Xi6; Yu, Qinglong6; Zhang, Zehua1; Xu, Xiuli1
刊名JOURNAL OF CLIMATE
出版日期2021-04-01
卷号34期号:8页码:3003-3019
关键词Arctic Sea ice Atmosphere-ocean interaction Atmospheric circulation Satellite observations
ISSN号0894-8755
DOI10.1175/JCLI-D-19-0843.1
通讯作者Liang, Yu(liangyu17@mails.ucas.ac.cn) ; Sun, Weifu(sunweifu@fio.org.cn)
英文摘要Atmospheric circulation associated with the Arctic dipole (AD) pattern plays a crucial role in modulating the variations of summertime sea ice concentration (SIC) within the Pacific Arctic sector (PAS). Based on reanalysis data and satellite observations, we found that the impacts of atmospheric circulation associated with a positive AD (AD+) on SIC change over different regions of the PAS [including the East Siberian Sea (ESS), Beaufort and Chukchi Seas (BCS), and Canadian Arctic Archipelago (CAA)] are dependent on the phase shifts of Pacific decadal oscillation (PDO). Satellite observations reveal that SIC anomalies, influenced by AD+ during PDO- relative to that during PDO+, varies significantly in summer by 4.9%, -7.3%, and -6.4% over ESS, BCS, and CAA, respectively. Overall, the atmospheric anomalies over CAA and BCS in terms of specific humidity, air temperature, and thereby downward longwave radiation (DLR), are enhanced (weakened) in the atmospheric conditions associated with AD+ during PDO- (PDO+). In these two regions, the larger (smaller) increases in specific humidity and air temperature, associated with AD+ during PDO- (PDO+), are connected to the increased (decreased) poleward moisture flux, strengthened (weakened) convergence of moisture and heat flux, and in part to adiabatic heating. As a consequence, the DLR and surface net energy flux anomalies over the two regions are reinforced in the atmospheric scenarios associated with AD+ during PDO- compared with that during PDO+. Therefore, smaller SIC anomalies are identified over CAA and BCS in the cases related to AD+ during PDO- than during PDO+. Essentially, the changes of the DLR anomaly in CAA and BCS are in alignment with geopotential height anomalies, which are modulated by the anticyclonic circulation pattern in association with AD+ during varying PDO phases. In contrast, the SIC changes over ESS is primarily attributed to the variations in mechanical wind forcing and sea surface temperature (SST) anomalies. The cloud fraction anomalies associated with AD+ during different PDO phases are found not to be a significant contributor to the variations of sea ice anomaly in the studied regions. Given the oscillatory nature of PDO, we speculate that the recent shift to the PDO+ phase may temporarily slow the observed significant decline trend of the summertime SIC within PAS of the Arctic.
资助项目National Key Research and Development Program of China[2016YFA0600102] ; National Key Research and Development Program of China[2017YFC1405106] ; National Key Research and Development Program of China[2016YFC1402707] ; National Key Research and Development Program of China[2019YFE0114800] ; National Natural Science Foundation of China[41406215] ; National Natural Science Foundation of China[41706194] ; Key Deployment Project of Centre for Ocean Mega-Research of Science, CAS[COMS2020Q12] ; Open Funds for the Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences[MGE2020KG04] ; Qingdao National Laboratory for Marine Science and Technology ; NSFC-Shandong Joint Fund for Marine Science Research Centers[U1606401]
WOS研究方向Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:000644147200011
出版者AMER METEOROLOGICAL SOC
源URL[http://ir.qdio.ac.cn/handle/337002/170922]  
专题海洋研究所_海洋地质与环境重点实验室
通讯作者Liang, Yu; Sun, Weifu
作者单位1.Univ Chinese Acad Sci, Beijing, Peoples R China
2.Minist Nat Resources, Inst Oceanog 1, Qingdao, Peoples R China
3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China
4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China
5.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China
6.Natl Marine Environm Forecasting Ctr, Marine Hazard Forecasting Ctr, Key Lab Res, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Bi, Haibo,Wang, Yunhe,Liang, Yu,et al. Influences of Summertime Arctic Dipole Atmospheric Circulation on Sea Ice Concentration Variations in the Pacific Sector of the Arctic during Different Pacific Decadal Oscillation Phases[J]. JOURNAL OF CLIMATE,2021,34(8):3003-3019.
APA Bi, Haibo.,Wang, Yunhe.,Liang, Yu.,Sun, Weifu.,Liang, Xi.,...&Xu, Xiuli.(2021).Influences of Summertime Arctic Dipole Atmospheric Circulation on Sea Ice Concentration Variations in the Pacific Sector of the Arctic during Different Pacific Decadal Oscillation Phases.JOURNAL OF CLIMATE,34(8),3003-3019.
MLA Bi, Haibo,et al."Influences of Summertime Arctic Dipole Atmospheric Circulation on Sea Ice Concentration Variations in the Pacific Sector of the Arctic during Different Pacific Decadal Oscillation Phases".JOURNAL OF CLIMATE 34.8(2021):3003-3019.

入库方式： OAI收割

来源：海洋研究所

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