气候变化领域集成服务门户(CCPortal): SABER Observations of Gravity Wave Responses to the Madden-Julian Oscillation From the Stratosphere to the Lower Thermosphere in Tropics and Extratropics

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DOI	10.1029/2020GL091014
	SABER Observations of Gravity Wave Responses to the Madden-Julian Oscillation From the Stratosphere to the Lower Thermosphere in Tropics and Extratropics
	Li J.; Lu X.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:23
英文摘要	The 17-year SABER-observed gravity wave (GW) temperature variances reveal significant responses of GWs to the Madden-Julian Oscillation (MJO) over the middle atmosphere (30–100 km) in tropics and extratropics (45°S to 45°N) for boreal winter. The responses vary significantly with latitude but barely with altitude. From 20°S to 45°N, strong positive anomalies are found for MJO Phases 3–5, while negative anomalies for Phases 7–8. From 45–20°S, these patterns are reversed. The peak-to-peak differences (positive-to-negative anomalies) are ~6–16% relative to the seasonal mean. Comparison with MJO modulations on tropical convection and polar vortex suggests that GW responses in tropics may result from the modulation of GW source, while responses in northern extratropics may result from the modulation of polar vortex, which in turn modulates GW activities. These results highlight the importance of GWs to imprint the tropical MJO signals vertically to the middle atmosphere and horizontally to extratropical regions. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Gravity waves; Ionosphere; Modulation; Tropics; Vortex flow; Boreal winters; Lower thermosphere; Madden-Julian oscillation; Middle atmosphere; Seasonal mean; Temperature variance; Tropical convection; Wave response; Climatology; convection; extratropical environment; gravity wave; Madden-Julian oscillation; middle atmosphere; polar vortex; seasonality; stratosphere; thermosphere
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/169316
作者单位	Department of Physics and Astronomy, Clemson University, Clemson, SC, United States
推荐引用方式 GB/T 7714	Li J.,Lu X.. SABER Observations of Gravity Wave Responses to the Madden-Julian Oscillation From the Stratosphere to the Lower Thermosphere in Tropics and Extratropics[J],2020,47(23).
APA	Li J.,&Lu X..(2020).SABER Observations of Gravity Wave Responses to the Madden-Julian Oscillation From the Stratosphere to the Lower Thermosphere in Tropics and Extratropics.Geophysical Research Letters,47(23).
MLA	Li J.,et al."SABER Observations of Gravity Wave Responses to the Madden-Julian Oscillation From the Stratosphere to the Lower Thermosphere in Tropics and Extratropics".Geophysical Research Letters 47.23(2020).