Water-insoluble and refractory carbon at Mt.Wa Liguan:mass concentration and source characteristics implied by 13C and 14C and 210Pb.
- 作者：Zheng XiangdongShen ChengdeWan GuojiangTang JieLiu Kexin
- 会议时间：2012-09-01
- 关键词：water-insoluble and refractory carbon (WIRC) ; mass concentration ; 13δC ; 14C ; Mt. Waliguan
- 作者单位：Zheng Xiangdong(Chinese Academy of Meteorological Sciences,Beijing,100081,P.R.China)Shen Chengde(State Key Laboratory of Isotope Geochronology and Geochemistry,Guanzhou Institute of Geochemistry,Chinese Academy of Sciences,Guanzhou 510640,P.R.China3)Wan Guojiang(State Key Laboratory of Environment Geochemistry,Institute of Geochemistry,ChineseAcademy of Sciences,Guiyang,550002;P.R.China)Tang Jie(Center of Meteorological sounding,Chinese Meteorological Administration,Beijing,100081)Liu Kexin(State Key laboratory of Nuclear Physics and Technology & Institute of Heavy Ion Physics,Peking University,Beijing 100871,China)
- 母体文献：第29届中国气象学会年会论文集
- 会议名称：第29届中国气象学会年会
- 会议地点：沈阳
- 主办单位：中国气象学会
- 语种：chi
摘要
Mass concentration,13C PDB (13δC) of water-insoluble and refractory carbon (WIRC) as the proxy for black carbon (BC) chemically extracted from total suspended particles (TSP) samples collected from December 2002 to January 2004 (50 samples) and from October 2005 to May 2006 (29 samples) at Waliguan (36.287oN 100.898oE,3810 m) are presented.The concentration of WIRC was 1183 ± 120 ng/m3,with the highest values in spring-winter,and its variation was in agreement with the optical BC concentration measured by aethalometer- but WIRC have higher values,especially in winter-spring with factor of 1~2.The seasonal mass concentration difference between WIRC and optical BC perhaps indicates that water soluble / insoluble carbon aerosols dominate the fraction of summer-autumn/winter-spring carbonaceous aerosols at the site.Mean 13δC of -25.3 ± 0.8‰ revealed that C3 plant burning was the major source of the WIRC.14C PMC for the later 29 samples revealed that the overall mean fraction of contemporary-derived carbon (fC) of BC was 67.2 ± 7.7% (n = 29).The fC and BC concentration was strongly associated with air parcel transports.Lower fC accompanying moist air-parcels were transported from eastern Waliguan in autumn and early winter,but the continuous fossil combustion heating in the region decreased fC in late winter and spring.Dust-storm transport through the remote areas of western may have caused high fC even though mass concentrations of TSP and BC were abnormally high.Week-to-week variations of 210Pb activity concentration in TSP and percentage of fossil–derived carbon (ff ) were in agreement,providing some evidence that coal combustion was the dominant fossil source of BC at Waliguan.