DOI: 10.1002/2017JD028110
Scopus记录号: 2-s2.0-85043237666
论文题名: Toward Synchronous Evaluation of Source Apportionments for Atmospheric Concentration and Deposition of Sulfate Aerosol Over East Asia
作者: Itahashi S.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 5 起始页码: 2927
结束页码: 2953
语种: 英语
英文关键词: chemical transport model
; deposition
; source apportionments
; tagged tracer method
英文摘要: Source apportionments for atmospheric concentration, dry deposition, and wet deposition of sulfate aerosol (SO4 2−) were synchronously evaluated over East Asia, a main source of anthropogenic sulfur dioxide (SO2) emissions. Estimating dry deposition was difficult owing to the difficulty of measuring deposition velocity directly; therefore, sensitivity simulations using two dry deposition schemes were conducted. Moreover, sensitivity simulations for different emission inventories, the largest uncertainty source in the air quality model, were also conducted. In total, four experimental settings were used. Model performance was verified for atmospheric concentration and wet deposition using a ground-based observation network in China, Korea, and Japan, and all four model settings captured the observations. The underestimation of wet deposition over China was improved by an adjusted approach that linearly scaled the modeled precipitation values to observations. The synchronous evaluation of source apportionments for atmospheric concentration and dry and wet deposition showed the dominant contribution of anthropogenic emissions from China to the atmospheric concentration and deposition in Japan. The contributions of emissions from volcanoes were more important for wet deposition than for atmospheric concentration. Differences in the dry deposition scheme and emission inventory did not substantially influence the relative ratio of source apportionments over Japan. Because the dry deposition was more attributed to local factors, the differences in dry deposition may be an important determinant of the source contributions from China to Japan. Verification of these findings, including the dry deposition velocity, is necessary for better understanding of the behavior of sulfur compound in East Asia. ©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/114270
Appears in Collections: 气候减缓与适应
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作者单位: Environmental Science Research Laboratory, Central Research Institute of Electric Power Industry, Abiko, Chiba, Japan; Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC, United States
Recommended Citation:
Itahashi S.. Toward Synchronous Evaluation of Source Apportionments for Atmospheric Concentration and Deposition of Sulfate Aerosol Over East Asia[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(5)