| 兰州春季沙尘过程PM10输送路径及其潜在源区 |
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| 引用本文： | 刘娜,余晔,陈晋北,何建军,赵素平.兰州春季沙尘过程PM10输送路径及其潜在源区[J].南京气象学院学报,2012,35(4):477-486. |
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| 作者姓名： | 刘娜 余晔 陈晋北 何建军 赵素平 |
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| 作者单位： | 1. 中国科学院寒区旱区环境与工程研究所寒旱区陆面过程与气候变化重点实验室,甘肃兰州730000 中国科学院研究生院,北京100039
2. 中国科学院寒区旱区环境与工程研究所寒旱区陆面过程与气候变化重点实验室,甘肃兰州,730000 |
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| 基金项目： | 中国科学院“百人计划”项目 |
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| 摘 要： | 将2001-2008年分为沙尘天气相对多年和相对少年，计算兰州市春季逐日4个时次的4d气团后向轨迹。通过聚类分析得到春季到达兰州市区的主要气团轨迹组，结合可吸入颗粒物PM10日均质量浓度资料，通过计算潜在源贡献因子PSCF（potential source contribution function）和浓度权重轨迹CWT（concentration-weighted trajectory），得到影响兰州市春季PMlo质量浓度的潜在源区以及不同源区对兰州市春季PM10质量浓度贡献的差异。结果表明，在沙尘天气相对多年，西路径和西北路径发生比例最高，分别占总轨迹的33％和19．4％，其中有50％以上为污染轨迹，是造成兰州市春季高质量浓度PM10污染的主要输送路径。沙尘天气相对少年的主要输送路径是西路径，其次是北路径，分别占23．6％和18％。影响兰州市春季大气PM10质量浓度的潜在源区分布在新疆塔里木盆地、吐鲁番盆地、青海柴达木盆地、甘肃河西走廊、内蒙古中部和西部的沙漠戈壁地区。
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| 关 键 词： | HYSPLIT轨迹模式 PM10 后向轨迹 传输路径 潜在源区 |
A study on potential sources and transportation pathways of PM10 in spring in Lanzhou |
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| LIU Na,YU Ye,CHEN Jin-bei,HE Jian-un,ZHAO Su-ping.A study on potential sources and transportation pathways of PM10 in spring in Lanzhou[J].Journal of Nanjing Institute of Meteorology,2012,35(4):477-486. |
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| Authors: | LIU Na YU Ye CHEN Jin-bei HE Jian-un ZHAO Su-ping |
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| Institution: | 1. Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China 2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China) |
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| Abstract: | Three-dimensional 4-day backward trajectories arriving in Lanzhou at 500m high were calcu- lated every 6 h by using HYSPLIT-4 trajectory model in spring of 2001 to 2008. The 8 years were di-vided 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 concentra- tion-weighted trajectory （CWT） method were used to evaluate the transportation pathways and poten-tial source regions of Lanzhou PM10 pollution in spring. Results indicate that the western and northwest-ern pathways, respectively accounting for 33% and 19.4% of all trajectories, were major pathways leading to high springtime PM10 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 PM10concen-tration 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. |
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| Keywords: | HYSPLIT model PMlo back-trajectories transportation pathways potential sources |
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