DOI: 10.1029/2017JD028172
Scopus记录号: 2-s2.0-85050394038
论文题名: Impacts of Synoptic Weather Patterns and their Persistency on Free Tropospheric Carbon Monoxide Concentrations and Outflow in Eastern China
作者: Han H. ; Liu J. ; Yuan H. ; Jiang F. ; Zhu Y. ; Wu Y. ; Wang T. ; Zhuang B.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 13 起始页码: 7024
结束页码: 7046
语种: 英语
英文关键词: AIRS CO
; carbon monoxide
; China
; CO outflow
; CO-weather relationship
; weather pattern classification
Scopus关键词: AIRS
; anticyclone
; atmospheric pollution
; concentration (composition)
; hydrocarbon migration
; outflow
; persistence
; synoptic meteorology
; temperature anomaly
; troposphere
; weather
; zonal wind
; China
英文摘要: The relationship between synoptic weather patterns (SWPs) and variability of air pollution has not been fully understood. In this study, we assess the sensitivity of carbon monoxide (CO) concentrations and outflow in the free troposphere over eastern China to SWPs and their persistency, using daily CO data from the spaceborne Atmospheric Infrared Sounder (AIRS) instrument from 2003 to 2015. The SWPs over eastern China are classified into eight patterns following the Kirchhofer approach. On a regional average over the 13 years, distinct differences are observed in CO distributions and outflows among the eight SWPs. CO concentrations tend to increase under three SWPs that are characterized with anticyclonic circulations and downdrafts in all or part of eastern China. In contrast, three SWPs related to the East Asian summer monsoon (EASM) tend to reduce CO concentrations. The remaining two SWPs, dominant in winter and autumn, respectively, tend to bring more clean episodes. CO outflow from eastern China is sensitive to the influence of the SWPs on zonal winds. CO outflow is enhanced under two SWPs that prevail in winter and spring. Under the other SWPs, CO outflow decreases or changes only slightly. CO concentrations either increase or decrease by 5–15% under the persistent control of a SWP for two to seven days. In most cases, the anomalies of CO concentrations and CO outflow tend to be amplified if a SWP persists for several days. This study statistically illustrates the synoptic influences on the regional distribution and transport of air pollutants. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113522
Appears in Collections: 气候减缓与适应
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作者单位: School of Atmospheric Sciences, Nanjing University, Nanjing, China; Department of Geography and Planning, University of Toronto, Toronto, ON, Canada; Key Laboratory of Mesoscale Severe Weather/Ministry of Education, Nanjing University, Nanjing, China; International Institute for Earth System Science, Nanjing University, Nanjing, China; Shanghai Public Meteorological Service Centre, Shanghai, China
Recommended Citation:
Han H.,Liu J.,Yuan H.,et al. Impacts of Synoptic Weather Patterns and their Persistency on Free Tropospheric Carbon Monoxide Concentrations and Outflow in Eastern China[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(13)