气候变化领域集成服务门户(CCPortal): Deriving Tropospheric Transit Time Distributions Using Airborne Trace Gas Measurements: Uncertainty and Information Content

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DOI	10.1029/2020JD034358
	Deriving Tropospheric Transit Time Distributions Using Airborne Trace Gas Measurements: Uncertainty and Information Content
	Chelpon S.M.; Pan L.L.; Luo Z.J.; Atlas E.L.; Honomichl S.B.; Smith W.P.; Wang S.; Ullmann K.; Hall S.R.; Apel E.C.; Hornbrook R.S.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:17
英文摘要	This study investigates the use of airborne in situ measurements to derive transit time distributions (TTD) from the boundary layer (BL) to the upper troposphere (UT) over the highly convective tropical western Pacific (TWP). The feasibility of this method is demonstrated using 42 volatile organic compounds (VOCs) measured during the Convective Transport of Active Species in the Tropics (CONTRAST) experiment. Two important approximations necessary for the application are the constant chemical lifetimes for each compound and the representation of the BL source by the local CONTRAST data. To characterize uncertainties associated with the first approximation, we quantify the changes in derived TTDs when chemical lifetimes are estimated using conditions of the BL, UT, and tropospheric average. With the support of a trajectory model study in a companion paper, we characterize the BL source region contributing to the transport to the sampled UT. In addition to the TTDs derived using a regional average, we analyze the potential information content in locally averaged measurements to represent the dynamical variability of the region. Around 150 TTDs, derived using measurements on a ∼100 km spatial scale, show a distribution of mean and mode transit times consistent with the wide range of convective conditions encountered during the campaign. Two extreme cases, with the shortest and the near-longest TTD, are examined using the dynamical background of the measurements and back trajectory analyses. The result provides physical consistency supporting the hypothesis that sufficient information can be obtained from measurements to resolve dynamical variability of the region. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	chemical lifetimes; convective transport; transit time distribution; tropospheric chemistry
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/237035
作者单位	City University of New York Graduate Center, New York, NY, United States; Atmospheric Chemistry Observations and Modeling Laboratory, National Center for Atmospheric Research, Boulder, CO, United States; City University of New York City College, New York, NY, United States; Univeristy of Miami, Miami, FL, United States; Now at National Oceanic and Atmospheric Administration (NOAA) Chemical Sciences Laboratory (CSL), Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, CO, United States
推荐引用方式 GB/T 7714	Chelpon S.M.,Pan L.L.,Luo Z.J.,et al. Deriving Tropospheric Transit Time Distributions Using Airborne Trace Gas Measurements: Uncertainty and Information Content[J],2021,126(17).
APA	Chelpon S.M..,Pan L.L..,Luo Z.J..,Atlas E.L..,Honomichl S.B..,...&Hornbrook R.S..(2021).Deriving Tropospheric Transit Time Distributions Using Airborne Trace Gas Measurements: Uncertainty and Information Content.Journal of Geophysical Research: Atmospheres,126(17).
MLA	Chelpon S.M.,et al."Deriving Tropospheric Transit Time Distributions Using Airborne Trace Gas Measurements: Uncertainty and Information Content".Journal of Geophysical Research: Atmospheres 126.17(2021).