| MODIS气溶胶产品在池州市能见度估算中的应用 |
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| 引用本文： | 孙卉,吴语燕,张明明,等..MODIS气溶胶产品在池州市能见度估算中的应用[J].气象与环境科学,2018,41(4):29-35. |
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| 作者姓名： | 孙卉 吴语燕 张明明 等. |
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| 摘 要： | 能见度可以直观反映空气污染程度,通过卫星反演获取能见度可以实现大面积同步观测,弥补地面观测在此方面的不足。基于安徽省池州市2015年Terra/MODIS的气溶胶产品(AOD)和池州市一区三县4个国家观测站的能见度观测资料,分析研究MODIS气溶胶产品与能见度的关系。通过拟合池州市四季气溶胶标高,建立不同季节能见度回归模型,并利用标高数据和AOD的季节分布,反演出池州能见度的季节变化,研究了近地层大气气溶胶与地面能见度的关系,最终获取了池州市2015年四季能见度时空分布并对其特征进行分析。结果表明:池州市夏季气溶胶标高最高,冬季的最低;能见度模型估算值与观测值整体较为一致,季节平均值相对误差为18. 15%;池州市2015年四季平均能见度为13. 8 km,整体呈从东南向西北逐渐减小的趋势,空间分布不均;季节平均能见度夏季最高,为19. 3 km,冬季最低,为9. 9 km,其中石台县各季能见度均明显好于其他地区的,且四季变化小而平稳;月平均能见度7月的最好,2月、5月和9月的较差;经济社会发展状况、生态环境和气候状况是影响池州市能见度分布时空变化的主要因素。
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| 关 键 词： | 能见度 AOD MODIS 卫星遥感 池州市 |
Application of MODIS Aerosol Product to Visibility Estimating in Chizhou |
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| Sun Hui,Wu Yuyan,Zhang Mingming,et al..Application of MODIS Aerosol Product to Visibility Estimating in Chizhou[J].Meteorological and Environmental Sciences,2018,41(4):29-35. |
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| Authors: | Sun Hui Wu Yuyan Zhang Mingming |
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| Abstract: | Visibility can directly reflect the degree of air pollution, and it can be realized to observe visibility synchronously in a larger area by satellite retrieval, filling the gap in ground observation. Based on the Terra/MODIS aerosol products (AOD) information and the ground observation data from four national meteorological stations in 2015 in Chizhou Anhui province, the relationship between the MODIS aerosol products and visibility was studied. Visibility regression model in different seasons was built by fitting the aerosol scale height. Using the seasonal models and scale height data, seasonal visibility change was retrieved and the relationship between surface visual range and aerosol loading was studied. Finally, the visibility distribution of Chizhou in 2015 was mapped and its spatio temporal characteristics was analyzed. The results showed that the aerosol in summer was the highest and that in winter the lowest; the visibility values came from the model were consistent with ground observation data overall, seasonal average relative error was 18.15%; annual average visibility in 2015 was 13.8 km, presenting a gradually decreasing trend from the southeast to the northwest and obviously seasonal variation feature; with the highest value of 19.3 km in summer and the lowest value of 9.9 km in winter. The visibility of Shitai county in every season was significantly better than other areas and its seasonal change was little and steady; as for monthly average visibility, July was best, February, May and September were poor. Economic and social development, ecological environment and climate conditions might be the main factors that affect the temporal and spatial variation of the visibility distribution in Chizhou. |
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| Keywords: | atmospheric particulate matter meteorological factor relative humidity wind direction Zhengzhou city |
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