气候变化领域集成服务门户(CCPortal): Combined influences on north American winter air temperature variability from north pacific blocking and the north atlantic oscillation: Subseasonal and interannual time scales

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DOI	10.1175/JCLI-D-19-0327.1
	Combined influences on north American winter air temperature variability from north pacific blocking and the north atlantic oscillation: Subseasonal and interannual time scales
	LUO B.; LUO D.; DAI A.; Simmonds I.; WU L.
发表日期	2020
ISSN	0894-8755
起始页码	7101
结束页码	7123
卷号	33 期号:16
英文摘要	Winter surface air temperature (SAT) over North America exhibits pronounced variability on subseasonal, interannual, decadal, and interdecadal time scales. Here, reanalysis data from 1950-2017 are analyzed to investigate the atmospheric and surface ocean conditions associated with its subseasonal to interannual variability. Detrended daily SAT data reveal a known warm west/cold east (WWCE) dipole over midlatitude North America and a cold north/warm south (CNWS) dipole over eastern North America. It is found that while the North Pacific blocking (PB) is important for the WWCE and CNWS dipoles, they also depend on the phase of the North Atlantic Oscillation (NAO). When a negative-phase NAO (NAO2) coincides with PB, the WWCE dipole is enhanced (compared with the PB alone case) and it also leads to a warm north/cold south dipole anomaly in eastern North America; but when PB occurs with a positive-phase NAO (NAO1), the WWCE dipole weakens and the CNWS dipole is enhanced. The PB events concurrent with the NAO2 (NAO1) and SAT WWCE (CNWS) dipole are favored by the Pacific El Niño-like (La Niña-like) sea surface temperature mode and the positive (negative) North Pacific mode. The PB-NAO1 has a larger component projecting onto the SAT WWCE dipole during the La Niña winter than during the El Niño winter because a more zonal wave train is formed. Strong North American SAT WWCE dipoles and enhanced projections of PB-NAO1 events onto the SAT WWCE dipole component are also readily seen for the positive North Pacific mode. The North Pacific mode seems to play a bigger role in the North American SAT variability than ENSO. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Atmospheric pressure; Atmospheric temperature; Oceanography; Surface waters; Dipole component; Eastern north america; Interannual time scale; Interannual variability; North Atlantic oscillations; Sea surface temperature (SST); Surface air temperatures; Surface ocean conditions; Climatology; air temperature; air-sea interaction; annual variation; El Nino; El Nino-Southern Oscillation; North Atlantic Oscillation; sea surface temperature; Pacific Ocean; Pacific Ocean (North)
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171187
作者单位	Key Laboratory of Physical Oceanography, Institute for Advanced Ocean Studies, Ocean University of China, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; CAS, Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing, China; Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York, Albany, NY, United States; School of Earth Sciences, University of MelbourneVIC, Australia; Key Laboratory of Physical Oceanography, Institute for Advanced Ocean Studies, Ocean University of China, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
推荐引用方式 GB/T 7714	LUO B.,LUO D.,DAI A.,et al. Combined influences on north American winter air temperature variability from north pacific blocking and the north atlantic oscillation: Subseasonal and interannual time scales[J],2020,33(16).
APA	LUO B.,LUO D.,DAI A.,Simmonds I.,&WU L..(2020).Combined influences on north American winter air temperature variability from north pacific blocking and the north atlantic oscillation: Subseasonal and interannual time scales.Journal of Climate,33(16).
MLA	LUO B.,et al."Combined influences on north American winter air temperature variability from north pacific blocking and the north atlantic oscillation: Subseasonal and interannual time scales".Journal of Climate 33.16(2020).