气候变化领域集成服务门户(CCPortal): Direct inversion of circulation from tracer measurements-Part 2: Sensitivity studies and model recovery tests

CCPortal

DOI	10.5194/acp-21-2509-2021
	Direct inversion of circulation from tracer measurements-Part 2: Sensitivity studies and model recovery tests
	Von Clarmann T.; Grabowski U.
发表日期	2021
ISSN	1680-7316
起始页码	2509
结束页码	2526
卷号	21 期号:4
英文摘要	The direct inversion of the 2D continuity equation allows for the inference of the effective meridional transport of trace gases in the middle stratosphere. This method exploits the information given by both the displacement of patterns in measured trace gas distributions and the approximate balance between sinks and horizontal as well as vertical advection. Model recovery tests show that with the current setup of the algorithm, this method reliably reproduces the circulation patterns in the entire analysis domain from 6 to 66 km altitude. Due to the regularization of the inversion, velocities above about 30 km are more likely under-than overestimated. This is explained by the fact that the measured trace gas distributions at higher altitudes generally contain less information and that the regularization of the inversion pushes results towards 0. Weaker regularization would in some cases allow a more accurate recovery of the velocity fields, but there is a price to pay in that the risk of convergence failure increases. No instance was found where the algorithm generated artificial patterns not present in the reference fields. Most information on effective velocities above 50 km is included in measurements of CH4, CO, H2O, and N2O, while CFC-11, HCFC-22, and CFC-12 constrain the inversion most efficiently in the middle stratosphere. H2O is a particularly important tracer in the upper troposphere or lower stratosphere. SF6 and CCl4 generally contain less information but still contribute to the reduction in the estimated uncertainties. With these tests, the reliability of the method has been established. © 2021 Association for Computing Machinery. All rights reserved.
语种	英语
scopus关键词	algorithm; atmospheric chemistry; data inversion; equation; model test; sensitivity analysis; stratosphere; trace gas; tracer
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247130
作者单位	Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany
推荐引用方式 GB/T 7714	Von Clarmann T.,Grabowski U.. Direct inversion of circulation from tracer measurements-Part 2: Sensitivity studies and model recovery tests[J],2021,21(4).
APA	Von Clarmann T.,&Grabowski U..(2021).Direct inversion of circulation from tracer measurements-Part 2: Sensitivity studies and model recovery tests.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(4).
MLA	Von Clarmann T.,et al."Direct inversion of circulation from tracer measurements-Part 2: Sensitivity studies and model recovery tests".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.4(2021).