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

doi:10.1175/JCLI-D-19-0843.1

IOCAS-IR

	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
	Bi, Haibo 1,2,3; Wang, Yunhe 1,2,3; Liang, Yu 1,2,3; Sun, Weifu 4; Liang, Xi 5; Yu, Qinglong 5; Zhang, Zehua 6; Xu, Xiuli 6
	2021-04-01
发表期刊	JOURNAL OF CLIMATE
ISSN	0894-8755
卷号	34 期号:8 页码:3003-3019
通讯作者	Liang, Yu(liangyu17@mails.ucas.ac.cn) ; Sun, Weifu(sunweifu@fio.org.cn)
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.
关键词	Arctic Sea ice Atmosphere-ocean interaction Atmospheric circulation Satellite observations
DOI	10.1175/JCLI-D-19-0843.1
收录类别	SCI
语种	英语
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
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000644147200011
出版者	AMER METEOROLOGICAL SOC
WOS关键词	NORTH PACIFIC ; OCEAN ; VARIABILITY ; CLIMATE ; IMPACT ; RADIATION ; THICKNESS ; ATLANTIC ; COVER ; TIME
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/170921
通讯作者	Liang, Yu; Sun, Weifu
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China 4.Minist Nat Resources, Inst Oceanog 1, Qingdao, Peoples R China 5.Natl Marine Environm Forecasting Ctr, Marine Hazard Forecasting Ctr, Key Lab Res, Beijing, Peoples R China 6.Univ Chinese Acad Sci, 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.