Seasonal changes in TC and WSOC and their 13C isotope ratios in Northeast Asian aerosols:Land surface-biosphere-atmosphere interactions
In order to understand the relative importance of anthropogenic and biological sources of carbonaceous aerosols in Northeast Asia,we measured total carbon(TC)and water-soluble organic carbon(WSOC)and their stable carbon isotope ratios(?13C)in total suspended particulates(TSP)collected from Sapporo,northern Japan(43.07°N,141.36°E)over a one-year period(2 September 2009 and 5 October 2010).Temporal variations of TC showed a gradual decrease from mid-autumn to winter followed by a gradual increase to growing season with a peak in early summer.Both ?13CTC and ?13CWSOC showed very similar temporal trends with a gradual enrichment of 13C from mid-autumn to winter followed by a depletion in the 13C to early summer and thereafter it remained stable,except for few cases.Based on the results obtained together with the air mass trajectories,we found that biogenic emissions including biological particles(e.g.,pollen)and secondary organic aerosol(SOA)formation from biogenic volatile organic compounds(BVOCs)are the important sources carbonaceous aerosols in spring/summer whereas fungal spores from soil and biomass burning and enhanced fossil fuel combustion contribute significantly in autumn/winter and in winter,respectively,in Northeast Asia..
Carbonaceous aerosols Stable carbon isotope ratios Sources Northeast Asia
Chandra Mouli Pavuluri Kimitaka Kawamura
Institute of Surface-Earth System Science,Tianjin University,Tianjin 300072,China;Institute of Low T Institute of Low Temperature Science,Hokkaido University,Sapporo 060-0819,Japan;Now at Chubu Institu
国际会议
The 11th International Symposium on Geochemistry of the Earths Surface(GES-11)(第十一届地球表层地球化学国际研讨会)
贵阳
英文
1-4
2017-06-11（万方平台首次上网日期，不代表论文的发表时间）