气候变化领域集成服务门户(CCPortal): Stratospheric influences on the MJO-induced Rossby wave train: Effects on intraseasonal climate

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DOI	10.1175/JCLI-D-18-0811.1
	Stratospheric influences on the MJO-induced Rossby wave train: Effects on intraseasonal climate
	Hood L.L.; Redman M.A.; Johnson W.L.; Galarneau T.J.; Jr.
发表日期	2020
ISSN	0894-8755
起始页码	365
结束页码	389
卷号	33 期号:1
英文摘要	The tropical Madden-Julian oscillation (MJO) excites a northward propagating Rossby wave train that largely determines the extratropical surface weather consequences of the MJO. Previous work has demonstrated a significant influence of the tropospheric El Niño-Southern Oscillation (ENSO) on the characteristics of this wave train. Here, composite analyses of ERA-Interim sea level pressure (SLP) and surface air temperature (SAT) data during the extended northern winter season are performed to investigate the additional role of stratospheric forcings [the quasi-biennial oscillation (QBO) and the 11-yr solar cycle] in modifying the wave train and its consequences. MJO phase composites of 20-100-day filtered data for the two QBO phases show that, similar to the cool phase of ENSO, the easterly phase of the QBO (QBOE) produces a stronger wave train and associated modulation of SLP and SAT anomalies. In particular, during MJO phases 5-7, positive SLP and negative SAT anomalies in the North Atlantic/Eurasian sector are enhanced during QBOE relative to the westerly phase of the QBO (QBOW). The opposite occurs during the earliest MJO phases. SAT anomalies over eastern North America are also more strongly modulated during QBOE. Although less certain because of the short data record, there is some evidence that the minimum phase of the solar cycle (SMIN) produces a similar increased modulation of SLP and SAT anomalies. The strongest modulations of SLP and SAT anomalies are produced when two or more of the forcings are superposed (e.g., QBOE/cool ENSO, SMIN/QBOE, etc.). © 2019 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; Mechanical waves; Modulation; Sea level; Solar energy; Composite analysis; Eastern north america; Madden-Julian oscillation; Quasi-biennial oscillation; Sea level pressure; Short data records; Southern oscillation; Surface air temperatures; Climatology; air temperature; air-sea interaction; climate forcing; El Nino-Southern Oscillation; extratropical environment; Madden-Julian oscillation; quasi-biennial oscillation; Rossby wave; sea level pressure; sea surface temperature; seasonal variation; stratosphere; temperature anomaly; wave propagation; Atlantic Ocean; Atlantic Ocean (North); Eurasia
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/171565
作者单位	Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, United States; Department of Earth and Climate Science, San Francisco State University, San Francisco, CA, United States; Cooperative Institute for Mesoscale Meteorological Studies, University of Oklahoma, NOAA, OAR, National Severe Storms Laboratory, Norman, OK, United States
推荐引用方式 GB/T 7714	Hood L.L.,Redman M.A.,Johnson W.L.,et al. Stratospheric influences on the MJO-induced Rossby wave train: Effects on intraseasonal climate[J],2020,33(1).
APA	Hood L.L.,Redman M.A.,Johnson W.L.,Galarneau T.J.,&Jr..(2020).Stratospheric influences on the MJO-induced Rossby wave train: Effects on intraseasonal climate.Journal of Climate,33(1).
MLA	Hood L.L.,et al."Stratospheric influences on the MJO-induced Rossby wave train: Effects on intraseasonal climate".Journal of Climate 33.1(2020).