气候变化领域集成服务门户(CCPortal): A 22-Year Evaluation of Convection Reaching the Stratosphere Over the United States

CCPortal

DOI	10.1029/2021JD034808
	A 22-Year Evaluation of Convection Reaching the Stratosphere Over the United States
	Homeyer C.R.; Bowman K.P.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:13
英文摘要	Stratosphere-reaching moist convection can significantly alter the dynamics, chemistry, and climate of the Earth system. This study seeks to add to the emerging understanding of the frequency, depth, and stratospheric impact of such events using 22 years (1996–2017) of ground-based radar observations in the contiguous United States. While most prior studies identify such storms using the temperature lapse-rate tropopause (LRT) as a troposphere-stratosphere boundary, this study is the first to identify convection that reaches into stratospheric air below the LRT (tropopause depressions, excluding folds) as well. It is found that tropopause depression (TD) overshooting and LRT overshooting occur at similar frequency over the United States, with TD overshooting being more episodic in nature than LRT overshooting. TD overshooting is also found more often throughout the cooler months of the year, while LRT overshooting dominates all overshooting in the summer months. Stratospheric residence of overshoot material, as estimated using trajectory calculations driven by large-scale winds, suggests that the vast majority of TD overshoot material does not remain in the stratosphere within 5 days downstream and rarely impacts altitudes more than 1 km above the LRT. Conversely, the majority of LRT overshoot material remains in the stratosphere downstream and routinely impacts altitudes >1 and >2 km above the tropopause. © 2021. American Geophysical Union. All Rights Reserved.
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/237155
作者单位	School of Meteorology, University of Oklahoma, Norman, OK, United States; Department of Atmospheric Sciences, Texas A&M University, College Station, TX, United States
推荐引用方式 GB/T 7714	Homeyer C.R.,Bowman K.P.. A 22-Year Evaluation of Convection Reaching the Stratosphere Over the United States[J],2021,126(13).
APA	Homeyer C.R.,&Bowman K.P..(2021).A 22-Year Evaluation of Convection Reaching the Stratosphere Over the United States.Journal of Geophysical Research: Atmospheres,126(13).
MLA	Homeyer C.R.,et al."A 22-Year Evaluation of Convection Reaching the Stratosphere Over the United States".Journal of Geophysical Research: Atmospheres 126.13(2021).