咸海地区粉尘气溶胶动态变化及潜在扩散特征

发布时间：2018-04-27 00:06

本文选题：气溶胶 + 沙尘　；参考：《中国沙漠》2016年05期

【摘要】：咸海水位不断下降导致湖滨荒漠化加剧,尘暴频发,区域环境恶化。利用臭氧观测仪(OMI)气溶胶数据和HYSPLIT(Hybrid Single Particle Lagrangian Integrated Trajectory Model)模型,对咸海地区近期粉尘气溶胶变化及其潜在扩散特征进行了研究。结果表明:2005年以来,咸海地区粉尘活动不断增强,OMI气溶胶指数年平均值、方差、中值和最大值均呈现快速增加趋势,2013年OMI气溶胶指数平均值已经上升至1.47;OMI气溶胶指数具有明显的季节变化特征,春季(3—5月)和秋末初冬(11月—次年1月)是两个气溶胶指数峰值区;在相同时间内,春季和冬季的粉尘潜在扩散范围最大,秋季次之,夏季最小,且粉尘潜在扩散表现出明显的经向和纬向扩散特征;受气流和地形影响,粉尘潜在扩散主要有东北和西南两个方向。
[Abstract]:The declining water level of the Aral Sea leads to the desertification of the lakeside, frequent dust storms and the deterioration of the regional environment. The recent dust aerosol variation and its potential diffusion characteristics in the Aral Sea region were studied by using the OMI aerosol data and the HYSPLIT(Hybrid Single Particle Lagrangian Integrated Trajectory Model) model. The results show that the dust activity in the Aral Sea area has been increasing since 2005, the annual mean value and variance of the OMI aerosol index, The mean value and maximum value of OMI aerosol index increased rapidly, and the average value of OMI aerosol index increased to 1.47 OMI aerosol index in 2013. The peak regions of aerosol index in spring and winter (November to January of the following year) are two aerosol index peaks, and the potential diffusion range of dust in spring and winter is the largest in spring and winter, followed by autumn and summer, in the same time, the peak value of aerosol index is the highest in spring and winter, and the lowest in summer. The potential diffusion of dust shows obvious characteristics of meridional and zonal diffusion, and the potential diffusion of dust is mainly in northeast and southwest due to the influence of air flow and topography.
【作者单位】：中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室;中国科学院中亚生态与环境研究中心;新疆师范大学生命科学学院;南京农业大学植物保护学院/农作物生物灾害综合治理教育部重点实验室;内蒙古大学环境与资源学院;
【基金】：国家自然科学基金项目(41471098)
【分类号】：P425.55;X513

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