Climate Change Data Portal
DOI | 10.5194/acp-21-16593-2021 |
Influence of springtime atmospheric circulation types on the distribution of air pollutants in the Arctic | |
Thomas M.A.; Devasthale A.; Nygärd T. | |
发表日期 | 2021 |
ISSN | 1680-7316 |
起始页码 | 16593 |
结束页码 | 16608 |
卷号 | 21期号:21 |
英文摘要 | The transport and distribution of short-lived climate forcers in the Arctic are influenced by the prevailing atmospheric circulation patterns. Understanding the coupling between pollutant distribution and dominant atmospheric circulation types is therefore important, not least to understand the processes governing the local processing of pollutants in the Arctic, but also to test the fidelity of chemistry transport models to simulate the transport from the southerly latitudes. Here, we use a combination of satellite-based and reanalysis datasets spanning over 12 years (2007-2018) and investigate the concentrations of NO2, O3, CO and aerosols and their co-variability during eight different atmospheric circulation types in the spring season (March, April and May) over the Arctic. We carried out a self-organizing map analysis of mean sea level pressure to derive these circulation types. Although almost all pollutants investigated here show statistically significant sensitivity to the circulation types, NO2 exhibits the strongest sensitivity among them. The circulation types with low-pressure systems located over the northeast Atlantic show a clear enhancement of NO2 and aerosol optical depths (AODs) in the European Arctic. The O3 concentrations are, however, decreased. The free tropospheric CO is increased over the Arctic during such events. The circulation types with atmospheric blocking over Greenland and northern Scandinavia show the opposite signal in which the NO2 concentrations are decreased and AODs are smaller than the climatological values. The O3 concentrations are, however, increased, and the free tropospheric CO is decreased during such events. The study provides the most comprehensive assessment so far of the sensitivity of springtime pollutant distribution to the atmospheric circulation types in the Arctic and also provides an observational basis for the evaluation of chemistry transport models. © 2021 Manu Anna Thomas et al. |
语种 | 英语 |
scopus关键词 | aerosol; aerosol property; atmospheric blocking; atmospheric circulation; atmospheric pollution; climatology; pollutant transport; satellite data; self organizing map; 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/246445 |
作者单位 | Research and Development, Swedish Meteorological and Hydrological Institute (SMHI), Folkborgsvägen 17, Norrköping, 60176, Sweden; Polar Meteorology and Climatology Group, Finnish Meteorological Institute (FMI), P.O. Box 503, Helsinki, 00101, Finland |
推荐引用方式 GB/T 7714 | Thomas M.A.,Devasthale A.,Nygärd T.. Influence of springtime atmospheric circulation types on the distribution of air pollutants in the Arctic[J],2021,21(21). |
APA | Thomas M.A.,Devasthale A.,&Nygärd T..(2021).Influence of springtime atmospheric circulation types on the distribution of air pollutants in the Arctic.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(21). |
MLA | Thomas M.A.,et al."Influence of springtime atmospheric circulation types on the distribution of air pollutants in the Arctic".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.21(2021). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。