气候变化领域集成服务门户(CCPortal): From the middle stratosphere to the surface, using nitrous oxide to constrain the stratosphere-troposphere exchange of ozone

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DOI	10.5194/acp-22-2079-2022
	From the middle stratosphere to the surface, using nitrous oxide to constrain the stratosphere-troposphere exchange of ozone
	Ruiz, Daniel J.; Prather, Michael J.
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	2079
结束页码	2093
卷号	22 期号:3 页码:15
英文摘要	Stratosphere-troposphere exchange (STE) is an important source of tropospheric ozone, affecting all of atmospheric chemistry, climate, and air quality. The study of impacts needs STE fluxes to be resolved by latitude and month, and for this, we rely on global chemistry models, whose results diverge greatly. Overall, we lack guidance from model-measurement metrics that inform us about processes and patterns related to the STE flux of ozone (O-3). In this work, we use modeled tracers (N2O and CFCl3), whose distributions and budgets can be constrained by satellite and surface observations, allowing us to follow stratospheric signals across the tropopause. The satellite-derived photochemical loss of N2O on annual and quasi-biennial cycles can be matched by the models. The STE flux of N2O-depleted air in our chemistry transport model drives surface variability that closely matches observed fluctuations on both annual and quasi-biennial cycles, confirming the modeled flux. The observed tracer correlations between N2O and O-3 in the lowermost stratosphere provide a hemispheric scaling of the N2O STE flux to that of O-3. For N2O and CFCl3, we model greater southern hemispheric STE fluxes, a result supported by some metrics, but counter to the prevailing theory of wave-driven stratospheric circulation. The STE flux of O-3, however, is predominantly northern hemispheric, but evidence shows that this is caused by the Antarctic ozone hole reducing southern hemispheric O-3 STE by 14 %. Our best estimate of the current STE O-3 flux based on a range of constraints is 400 Tg(O-3) yr(-1), with a 1 sigma uncertainty of +/- 15 % and with a NH : SH ratio ranging from 50:50 to 60:40. We identify a range of observational metrics that can better constrain the modeled STE O-3 flux in future assessments.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000759323900001
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/273753
作者单位	University of California System; University of California Irvine
推荐引用方式 GB/T 7714	Ruiz, Daniel J.,Prather, Michael J.. From the middle stratosphere to the surface, using nitrous oxide to constrain the stratosphere-troposphere exchange of ozone[J],2022,22(3):15.
APA	Ruiz, Daniel J.,&Prather, Michael J..(2022).From the middle stratosphere to the surface, using nitrous oxide to constrain the stratosphere-troposphere exchange of ozone.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(3),15.
MLA	Ruiz, Daniel J.,et al."From the middle stratosphere to the surface, using nitrous oxide to constrain the stratosphere-troposphere exchange of ozone".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.3(2022):15.