A study on potential sources and transportation pathways of PM_10 in spring in Lanzhou
A study on potential sources and transportation pathways of PM_10 in spring in Lanzhou
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发表时间：
2012
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通讯作者：
Z. Su-ping
中科院分区：
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作者：
Z. Su-ping
Three-dimensional 4-day backward trajectories arriving in Lanzhou at 500m high were calculated every 6 h by using HYSPLIT-4 trajectory model in spring of 2001 to 2008.The 8 years were divided into two categories:high dust year(2001,2002,2004 and 2006) and low dust year(2003,2005,2007 and 2008).Cluster analysis,potential source contribution function(PSCF) model,and concentration-weighted trajectory(CWT) method were used to evaluate the transportation pathways and potential source regions of Lanzhou PM_10 pollution in spring.Results indicate that the western and northwestern pathways,respectively accounting for 33% and 19.4% of all trajectories,were major pathways leading to high springtime PM_10 loadings in Lanzhou in 2001,2002,2004 and 2006.However,the major pathways were the western and the northern pathways in 2003,2005,2007 and 2008,accounting for 23.6% and 18%,respectively.There were six potential source regions that had effect on PM_10 concentration in Lanzhou,including Tarim Basin and Turpan Basin in Xinjiang,Qaidam Basin in Qinghai,Hexi Corridor in Gansu Province,the desert and gobi area in central and western Inner Mongolia.
