气候变化领域集成服务门户(CCPortal): Seasonal Variation of the Quasi-Biennial Oscillation Descent

CCPortal

DOI	10.1029/2020JD033077
	Seasonal Variation of the Quasi-Biennial Oscillation Descent
	Coy L.; Newman P.A.; Strahan S.; Pawson S.
发表日期	2020
ISSN	2169897X
卷号	125 期号:18
英文摘要	This study examines variations through the year in the rate of descent of the quasi-biennial oscillation (QBO) wind in the tropical lower stratosphere. The work is based on the Modern-Era Retrospective analysis for Research and Applications, Version 2 (MERRA-2) multiyear global reanalysis. A 10-member ensemble of free-running atmospheric simulations using the Global Earth Observing System (GEOS) atmospheric general circulation model is also examined. The QBO winds are decomposed into two orthogonal modes that describe amplitude and phase propagation. This reveals a semiannual signal in descent rate, with slow descent at times of large middle-latitude planetary wave activity, suggesting that this wave activity influences equatorial vertical velocity. This result also explains the suppression of QBO wind transitions during active wave times. Results also show a variation in descent speed when plotted against QBO phase. These results provide a baseline of QBO behavior for future QBO modeling. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	quasi-biennial oscillation; stratospheric dynamics; tropical dynamics
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185757
作者单位	Science Systems and Applications Inc., Lanham, MD, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Universities Space Research Association, Columbia, MD, United States
推荐引用方式 GB/T 7714	Coy L.,Newman P.A.,Strahan S.,et al. Seasonal Variation of the Quasi-Biennial Oscillation Descent[J],2020,125(18).
APA	Coy L.,Newman P.A.,Strahan S.,&Pawson S..(2020).Seasonal Variation of the Quasi-Biennial Oscillation Descent.Journal of Geophysical Research: Atmospheres,125(18).
MLA	Coy L.,et al."Seasonal Variation of the Quasi-Biennial Oscillation Descent".Journal of Geophysical Research: Atmospheres 125.18(2020).