研究报告
郑卓云,陈良富,郑君瑜,钟流举,刘启汉.高分辨率气溶胶光学厚度在珠三角及香港地区区域颗粒物监测中的应用研究[J].环境科学学报,2011,31(6):1154-1161
高分辨率气溶胶光学厚度在珠三角及香港地区区域颗粒物监测中的应用研究
- Application of retrieved high-resolution AOD in regional PM monitoring in the Pearl River Delta and Hong Kong region
- 基金项目：粤港联合科技创新平台(No.2009B050900005);"十一五"国家高技术研究发展计划(No.2006AA06A303)
- 作者
- 单位
- 郑卓云
- 华南理工大学环境科学与工程学院, 广州 510006
- 陈良富
- 中国科学院遥感应用研究所,遥感科学国家重点实验室, 北京 100101
- 郑君瑜
- 华南理工大学环境科学与工程学院, 广州 510006
- 钟流举
- 广东省环境监测中心, 广州 510045
- 刘启汉
- 香港科技大学环境研究所,香港
- 摘要：利用最新的MODIS(中分辨率成像光谱仪)气溶胶光学厚度(AOD)反演算法,反演珠江三角洲及香港地区2008年高分辨率(1km×1km) AOD分布,并与AERONET观测数据进行了验证(r=0.917).分析了2008年珠江三角洲及香港地区5个站点地面监测PM10质量浓度与反演的AOD数据相关性.结果表明:两者直接相关性较低(r=0.127~0.230).经过气溶胶季节标高垂直订正及相对湿度订正后,两者相关性显著提高(r=0.397~0.574).利用气溶胶消光系数建立PM10观测浓度与AOD线性回归模型,反演珠三角与香港地区地面PM10浓度的空间分布.结果表明该高分辨率AOD产品可用于区域大气污染分析,为评估区域空气质量提供一种有效途径.
- Abstract：Based on the newest aerosol retrieval algorithm for the Moderate Resolution Imaging Spectroradiometer (MODIS), 1 km×1 km aerosol optical depth (AOD) data over the Pearl River Delta region and Hong Kong was retrieved, and validated with the AERONET observations (r=0.917). Correlations between the retrieved AOD data and observed PM10 concentrations in 2008 at 5 monitoring stations in the Pearl River Delta region and Hong Kong were analyzed. The results indicated that initial correlations between AOD and PM10 concentrations are relatively low(r=0.127~0.230); however, the correlations were greatly improved after the vertical correction of seasonal aerosol scalar heights and the relative humidity (RH) correction on aerosol optical properties (r=0.397~0.574). A linear regression model of the observed PM10 concentrations vs AOD data was developed with the use of aerosol extinction coefficients to retrieve the surface PM10 concentration distributions. Our results suggest that the high-resolution AOD data can help analyze regional air pollution characteristics and provide an alternative approach for assessing regional air quality.
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