globalchange  > 影响、适应和脆弱性
DOI: 10.1002/jgrd.503172013
论文题名:
Seasonal variations of black carbon observed at the remote mountain site Happo in Japan
作者: Liu X.; Kondo Y.; Ram K.; Matsui H.; Nakagomi K.; Ikeda T.; Oshima N.; Verma R.L.; Takegawa N.; Koike M.; Kajino M.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期:9
起始页码: 3709
结束页码: 3722
语种: 英语
Scopus关键词: Accurate measurement ; Asian continent ; Biomass-burning ; Long range transport ; Mass concentration ; Monitoring system ; Seasonal variation ; Trajectory analysis ; atmospheric pollution ; black carbon ; concentration (composition) ; height ; long range transport ; monitoring ; mountain region ; observational method ; remote sensing ; seasonal variation ; Pacific Ocean ; Pacific Ocean (West)
英文摘要: The emission of black carbon (BC) from East Asia and its long-range transport strongly influence the mass concentration of BC (MBC) over the western Pacific. However, reliable and long-term BC data are still limited in this region, especially at elevated altitudes. In this study, we present accurate measurements of MBC using a continuous soot monitoring system at Happo, a remote mountain site at an altitude of about 1.8 km in Japan, from August 2007 to August 2009. The annual average MBC at Happo was about 0.260.18 (1s) mgm3. The monthly average MBC values exhibited similar seasonal variations during both years, with minimum values in winter. Around 40% of the air sampled at the site was of free tropospheric (FT) origin, with about 10% originating in North China (NC) origin, respectively. The MBC values for FT (0.24 mgm3) and NC (0.23 mgm3) air were representative of the MBC values (0.26 mgm3) at 1.8 km height in the western Pacific, which are strongly influenced by BC emissions in North China. The MBC values calculated using a regional-scale model reproduced well the MBC observed at Happo. The model predicted that BC transported from northern China alone contributed ~53% to the measured MBC, consistent with trajectory analysis. The comparison of model-calculated and observed MBC values indicates that the minimum values of MBC in winter were caused by the suppressed upward transport of BC over the Asian continent. Biomass burning in Siberia substantially increased MBC in the spring of 2008. © 2013. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63458
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: Department of Earth and Planetary Science, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan; Now at the School of Mathematics and Physics, Changzhou University, Changzhou, China; School of Earth, Ocean and Climate Sciences, Indian Institute of Technology, Bhubaneswar, India; Nagano Environmental Conservation Research Institute, Nagano, Japan; Meteorological Research Institute, Tsukuba, Japan; Regional Resources Center for Asia and the Pacific, Asian Institute of Technology, Klong Luang, Thailand; Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan

Recommended Citation:
Liu X.,Kondo Y.,Ram K.,et al. Seasonal variations of black carbon observed at the remote mountain site Happo in Japan[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(9)
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