气候变化领域集成服务门户(CCPortal): Zonal Asymmetry of the QBO Temperature Signal in the Tropical Tropopause Region

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DOI	10.1029/2020GL089533
	Zonal Asymmetry of the QBO Temperature Signal in the Tropical Tropopause Region
	Tegtmeier S.; Anstey J.; Davis S.; Ivanciu I.; Jia Y.; McPhee D.; Pilch Kedzierski R.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:24
英文摘要	The quasi-biennial oscillation (QBO) of the equatorial zonal wind leads to zonally symmetric temperature variations in the stratosphere that descend downward. Here we investigate the QBO-induced temperature anomalies in the tropical tropopause layer (TTL) and detect pronounced longitudinal variations of the signal. In addition, the QBO temperature anomalies show a strong seasonal variability. The magnitude of these seasonal and longitudinal QBO variations is comparable to the magnitude of the well-known zonal mean QBO signal in the TTL. At the cold point tropopause, the strongest QBO variations of around ±1.6 K are found over regions of active convection such as the West Pacific and Africa during boreal winter. The weakest QBO variations of ±0.25 K are detected over the East Pacific during boreal summer, while the zonal mean signal ranges around ±0.7 K. The longitudinal variations are associated with enhanced convective activity that occurs during QBO cold phases and locally enhances the cold anomalies. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Transistor transistor logic circuits; Tropics; Convective activity; Longitudinal variations; Quasi-biennial oscillation; Seasonal variability; Temperature anomaly; Temperature variation; Tropical tropopause; Tropical tropopause layers; Clouds; convection; longitudinal gradient; quasi-biennial oscillation; stratosphere; summer; tropopause; zonal wind; Africa; Pacific Ocean; Pacific Ocean (East); Pacific Ocean (West)
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169287
作者单位	Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, SK, Canada; Canadian Centre for Climate Modelling and Analysis, Environment and Climate Change Canada, Victoria, BC, Canada; NOAA Chemical Sciences Laboratory, Boulder, CO, United States; GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
推荐引用方式 GB/T 7714	Tegtmeier S.,Anstey J.,Davis S.,et al. Zonal Asymmetry of the QBO Temperature Signal in the Tropical Tropopause Region[J],2020,47(24).
APA	Tegtmeier S..,Anstey J..,Davis S..,Ivanciu I..,Jia Y..,...&Pilch Kedzierski R..(2020).Zonal Asymmetry of the QBO Temperature Signal in the Tropical Tropopause Region.Geophysical Research Letters,47(24).
MLA	Tegtmeier S.,et al."Zonal Asymmetry of the QBO Temperature Signal in the Tropical Tropopause Region".Geophysical Research Letters 47.24(2020).