气候变化领域集成服务门户(CCPortal): Variability in QBO temperature anomalies on annual and decadal time scales

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DOI	10.1175/JCLI-D-20-0287.1
	Variability in QBO temperature anomalies on annual and decadal time scales
	Martin Z.; Sobel A.; Butler A.; Wang S.
发表日期	2021
ISSN	0894-8755
起始页码	589
结束页码	605
卷号	34 期号:2
英文摘要	The stratospheric quasi-biennial oscillation (QBO) induces temperature anomalies in the lower stratosphere and tropical tropopause layer (TTL) that are cold when lower-stratospheric winds are easterly and warm when winds are westerly. Recent literature has indicated that these QBO temperature anomalies are potentially important in influencing the tropical troposphere, and particularly in explaining the relationship between the QBO and the Madden-Julian oscillation (MJO). The authors examine the variability of QBO temperature anomalies across several time scales using reanalysis and observational datasets. The authors find that, in boreal winter relative to other seasons, QBO temperature anomalies are significantly stronger (i.e., colder in the easterly phase of the QBO and warmer in the westerly phase of the QBO) on the equator, but weaker off the equator. The equatorial and subtropical changes compensate such that meridional temperature gradients and thus (by thermal wind balance) equatorial zonal wind anomalies do not vary in amplitude as the temperature anomalies do. The same pattern of stronger on-equatorial and weaker off-equatorial QBO temperature anomalies is found on decadal time scales: stronger anomalies are seen for 1999-2019 compared to 1979-99. The causes of these changes to QBO temperature anomalies, as well as their possible relevance to the MJO-QBO relationship, are not known. © 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	Time measurement; Tropics; Lower stratosphere; Madden-Julian oscillation; Meridional temperature gradient; Quasi-biennial oscillation; Stratospheric winds; Temperature anomaly; Tropical tropopause layers; Tropical troposphere; Climatology; annual variation; decadal variation; Madden-Julian oscillation; quasi-biennial oscillation; seasonal variation; seasonality; stratosphere-troposphere interaction; temperature anomaly
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/170945
作者单位	Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States; Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States; NOAA/Chemical Sciences Laboratory, Boulder, CO, United States
推荐引用方式 GB/T 7714	Martin Z.,Sobel A.,Butler A.,et al. Variability in QBO temperature anomalies on annual and decadal time scales[J],2021,34(2).
APA	Martin Z.,Sobel A.,Butler A.,&Wang S..(2021).Variability in QBO temperature anomalies on annual and decadal time scales.Journal of Climate,34(2).
MLA	Martin Z.,et al."Variability in QBO temperature anomalies on annual and decadal time scales".Journal of Climate 34.2(2021).