气候变化领域集成服务门户(CCPortal): Role of oceanic ozone deposition in explaining temporal variability in surface ozone at High Arctic sites

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DOI	10.5194/acp-21-10229-2021
	Role of oceanic ozone deposition in explaining temporal variability in surface ozone at High Arctic sites
	Barten J.G.M.; Ganzeveld L.N.; Steeneveld G.-J.; Krol M.C.
发表日期	2021
ISSN	1680-7316
起始页码	10229
结束页码	10248
卷号	21 期号:13
英文摘要	Dry deposition is an important removal mechanism for tropospheric ozone (O3). Currently, O3 deposition to oceans in atmospheric chemistry and transport models (ACTMs) is generally represented using constant surface uptake resistances. This occurs despite the role of solubility, waterside turbulence and O3 reacting with ocean water reactants such as iodide resulting in substantial spatiotemporal variability in O3 deposition and concentrations in marine boundary layers. We hypothesize that O3 deposition to the Arctic Ocean, having a relatively low reactivity, is overestimated in current models with consequences for the tropospheric concentrations, lifetime and long-range transport of O3. We investigate the impact of the representation of oceanic O3 deposition to the simulated magnitude and spatiotemporal variability in Arctic surface O3. We have integrated the Coupled Ocean-Atmosphere Response Experiment Gas transfer algorithm (COAREG) into the mesoscale meteorology and atmospheric chemistry model Polar-WRF-Chem (WRF) which introduces a dependence of O3 deposition on physical and biogeochemical drivers of oceanic O3 deposition. Also, we reduced the O3 deposition to sea ice and snow. Here, we evaluate WRF and CAMS reanalysis data against hourly averaged surface O3 observations at 25 sites (latitudes > 60° N). This is the first time such a coupled modeling system has been evaluated against hourly observations at pan-Arctic sites to study the sensitivity of the magnitude and temporal variability in Arctic surface O3 on the deposition scheme. We find that it is important to nudge WRF to the ECMWF ERA5 reanalysis data to ensure adequate meteorological conditions to evaluate surface O3. We show that the mechanistic representation of O3 deposition over oceans and reduced snow/ice deposition improves simulated Arctic O3 mixing ratios both in magnitude and temporal variability compared to the constant resistance approach. Using COAREG, O3 deposition velocities are in the order of 0.01 cm s-1 compared to ∼ 0.05 cm s-1 in the constant resistance approach. The simulated monthly mean spatial variability in the mechanistic approach (0.01 to 0.018 cm s-1) expresses the sensitivity to chemical enhancement with dissolved iodide, whereas the temporal variability (up to ±20 % around the mean) expresses mainly differences in waterside turbulent transport. The mean bias for six sites above 70° N reduced from-3.8 to 0.3 ppb with the revision to ocean and snow/ice deposition. Our study confirms that O3 deposition to high-latitude oceans and snow/ice is generally overestimated in ACTMs. We recommend that a mechanistic representation of oceanic O3 deposition is preferred in ACTMs to improve the modeled Arctic surface O3 concentrations in terms of magnitude and temporal variability. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	atmospheric chemistry; boundary layer; concentration (composition); dry deposition; marine atmosphere; ozone; spatial variation; temporal variation; troposphere; Arctic
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/246752
作者单位	Meteorology and Air Quality Section, Wageningen University, Wageningen, Netherlands; Institute for Marine and Atmospheric Research Utrecht, Utrecht University, Utrecht, Netherlands
推荐引用方式 GB/T 7714	Barten J.G.M.,Ganzeveld L.N.,Steeneveld G.-J.,et al. Role of oceanic ozone deposition in explaining temporal variability in surface ozone at High Arctic sites[J],2021,21(13).
APA	Barten J.G.M.,Ganzeveld L.N.,Steeneveld G.-J.,&Krol M.C..(2021).Role of oceanic ozone deposition in explaining temporal variability in surface ozone at High Arctic sites.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(13).
MLA	Barten J.G.M.,et al."Role of oceanic ozone deposition in explaining temporal variability in surface ozone at High Arctic sites".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.13(2021).