气候变化领域集成服务门户(CCPortal): Ozone depletion events in the Arctic spring of 2019: a new modeling approach to bromine emissions

CCPortal

DOI	10.5194/acp-22-13495-2022
	Ozone depletion events in the Arctic spring of 2019: a new modeling approach to bromine emissions
	Herrmann, Maximilian; Schoene, Moritz; Borger, Christian; Warnach, Simon; Wagner, Thomas; Platt, Ulrich; Gutheil, Eva
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	13495
结束页码	13526
卷号	22 期号:20 页码:32
英文摘要	Ozone depletion events (ODEs) are a common occurrence in the boundary layer during Arctic spring. Ozone is depleted by bromine species, which are most likely emitted from snow, sea ice, or aerosols in an autocatalytic reaction cycle. Previous three-dimensional modeling studies of ODEs assumed an infinite bromine source at the ground. In the present study, an alternative emission scheme is presented in which a finite amount of bromide in the snow is tracked over time. For this purpose, a modified version of the Weather Research and Forecasting model coupled with Chemistry (WRF-Chem) is used to study ODEs in the Arctic from February to May 2019. The model data are compared to in situ measurements, ozone sonde flights, and satellite data. A simulation of the ODEs in the Arctic spring of 2009 using the infinite-bromide assumption on first-year (FY) ice is transferred to the spring of 2019, which achieves good agreement with the observations; however, there is some disagreement in April 2009 and 2019 with respect to an overestimation concerning both the magnitude and the number of ODEs. New simulations using the finite-bromide assumption greatly improve agreement with in situ observations at Utqiagvik, Alaska, Zeppelin Mountain, Svalbard, and Pallas, Finland, in April 2019, suggesting that bromide on the sea ice is depleted to an extent that reduces the bromine release. The new simulations also slightly improve the agreement with observations at these sites in February and March. A comparison to measurements near Eureka, Canada, and Station Nord, Greenland, shows that multi-year ice and possibly snow-covered land may be significant bromine sources. However, assuming higher releasable bromide near Eureka does not remove all disagreement with the observations. The numerical results are also compared to tropospheric-BrO vertical column densities generated with a new retrieval method from TROPOspheric Monitoring Instrument (TROPOMI) observations. BrO vertical column densities (VCDs) above 5x10(13) molec. cm(-2) observed by the satellite agree well with the model results. However, the model also predicts BrO VCDs of around 3x10(13) molec. cm(-2) throughout the Arctic and patches of BrO VCDs of around 10(14) molec. cm(-2) not observed by the satellite, especially near Hudson Bay. This suggests that snow at Hudson Bay may be a weaker bromine source in late spring compared to snow in the north.
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:000869702500001
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/273847
作者单位	Ruprecht Karls University Heidelberg; Max Planck Society; Ruprecht Karls University Heidelberg; Ruprecht Karls University Heidelberg
推荐引用方式 GB/T 7714	Herrmann, Maximilian,Schoene, Moritz,Borger, Christian,et al. Ozone depletion events in the Arctic spring of 2019: a new modeling approach to bromine emissions[J],2022,22(20):32.
APA	Herrmann, Maximilian.,Schoene, Moritz.,Borger, Christian.,Warnach, Simon.,Wagner, Thomas.,...&Gutheil, Eva.(2022).Ozone depletion events in the Arctic spring of 2019: a new modeling approach to bromine emissions.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(20),32.
MLA	Herrmann, Maximilian,et al."Ozone depletion events in the Arctic spring of 2019: a new modeling approach to bromine emissions".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.20(2022):32.