气候变化领域集成服务门户(CCPortal): Mechanisms Responsible for Stratosphere-to-Troposphere Transport Around a Mesoscale Convective System Anvil

CCPortal

DOI	10.1029/2019JD032016
	Mechanisms Responsible for Stratosphere-to-Troposphere Transport Around a Mesoscale Convective System Anvil
	Phoenix D.B.; Homeyer C.R.; Barth M.C.; Trier S.B.
发表日期	2020
ISSN	2169897X
卷号	125 期号:10
英文摘要	Recent observational studies have shown that stratospheric air rich in ozone (O3) is capable of being transported into the upper troposphere in association with tropopause-penetrating convection (anvil wrapping). This finding challenges the current understanding of upper tropospheric sources of O3, which is traditionally thought to come from thunderstorm outflows where lightning-generated nitrogen oxides facilitate O3 formation. Since tropospheric O3 is an important greenhouse gas and the frequency and strength of tropopause-penetrating storms may change in a changing climate, it is important to understand the mechanisms driving this transport process so that it can be better represented in chemistry-climate models. Simulations of a mesoscale convective system (MCS) around which this transport process was observed are performed using the Weather Research and Forecasting model coupled with Chemistry. The Weather Research and Forecasting model coupled with Chemistry model adequately simulates anvil wrapping of ozone-rich air. Possible mechanisms that influence the transport, including small-scale static and dynamic instabilities and MCS-induced mesoscale circulations, are evaluated. Model results suggest that anvil wrapping is a two-step transport process (1) compensating subsidence surrounding the MCS, which is driven by mass conservation as the MCS transports tropospheric air into the upper troposphere and lower stratosphere, followed by (2) differential advection beneath the core of the MCS upper-tropospheric outflow jet which wraps high O3 air around and under the MCS cloud anvil. Static and dynamic instabilities are not a leading contributor to this transport process. Continued fine-scale modeling of these events is needed to fully represent the stratosphere-to-troposphere transport process. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	convection; ozone; transport
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/186002
作者单位	Now at Department of Forest and Natural Resource Management, State University of New York College of Environmental Science and Forestry, Syracuse, NY, United States; School of Meteorology, University of Oklahoma, Norman, OK, United States; Atmospheric Chemistry Observations & Modeling, National Center for Atmospheric Research, Boulder, CO, United States; Mesoscale and Microscale Meteorology Laboratory, National Center for Atmospheric Research, Boulder, CO, United States
推荐引用方式 GB/T 7714	Phoenix D.B.,Homeyer C.R.,Barth M.C.,et al. Mechanisms Responsible for Stratosphere-to-Troposphere Transport Around a Mesoscale Convective System Anvil[J],2020,125(10).
APA	Phoenix D.B.,Homeyer C.R.,Barth M.C.,&Trier S.B..(2020).Mechanisms Responsible for Stratosphere-to-Troposphere Transport Around a Mesoscale Convective System Anvil.Journal of Geophysical Research: Atmospheres,125(10).
MLA	Phoenix D.B.,et al."Mechanisms Responsible for Stratosphere-to-Troposphere Transport Around a Mesoscale Convective System Anvil".Journal of Geophysical Research: Atmospheres 125.10(2020).