TY - GEN
T1 - Spatial and seasonal variations of MODIS aerosol optical depth in East China during 2000-2012
AU - Zhai, Tianyong
AU - Zhao, Qing
AU - Shi, Runhe
AU - Gao, Wei
PY - 2013
Y1 - 2013
N2 - This study compares the aerosol optical depth (AOD) at 0.55 um derived from the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the National Aeronautics and Space Administration (NASA) Terra satellite with the Level 2.0 AOD (Quality Assured) from the Aerosol Robotic Network (AERONET) at four different locations over East China, including Hefei, Shouxian, Taihu, and Hangzhou-ZFU. The evaluation results indicate that most MODIS data from all sites fall into the expected error ranges (± 0.05 ± 0.15), with over a 66% probability that the NASA design requirements have been met. The Taihu station is an exception, accounting for only 41% of expected errors due to its lake area location and tendency to underestimate surface reflectance, thereby increasing the AOD values. Overall, the MODIS data show a good consistency and thus, are applicable for this analysis over the study area. The MODIS/Terra derived AOD at 0.55 um from 2000 to 2012 are used to analyze the spatio-temporal variation of AOD in East China. Results indicate that AODs are significantly affected by the topographic distribution. The AODs are relativity low over mountainous areas and high over plains and basins. Human activities also have a certain impact on the distribution of AOD. In addition, AODs exhibit clear seasonal variations; generally high in spring and summer, but low in autumn and winter. Combined with Ångström exponent, aerosol particles are mainly coarse in spring and winter, but fine during summer and autumn.
AB - This study compares the aerosol optical depth (AOD) at 0.55 um derived from the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the National Aeronautics and Space Administration (NASA) Terra satellite with the Level 2.0 AOD (Quality Assured) from the Aerosol Robotic Network (AERONET) at four different locations over East China, including Hefei, Shouxian, Taihu, and Hangzhou-ZFU. The evaluation results indicate that most MODIS data from all sites fall into the expected error ranges (± 0.05 ± 0.15), with over a 66% probability that the NASA design requirements have been met. The Taihu station is an exception, accounting for only 41% of expected errors due to its lake area location and tendency to underestimate surface reflectance, thereby increasing the AOD values. Overall, the MODIS data show a good consistency and thus, are applicable for this analysis over the study area. The MODIS/Terra derived AOD at 0.55 um from 2000 to 2012 are used to analyze the spatio-temporal variation of AOD in East China. Results indicate that AODs are significantly affected by the topographic distribution. The AODs are relativity low over mountainous areas and high over plains and basins. Human activities also have a certain impact on the distribution of AOD. In addition, AODs exhibit clear seasonal variations; generally high in spring and summer, but low in autumn and winter. Combined with Ångström exponent, aerosol particles are mainly coarse in spring and winter, but fine during summer and autumn.
KW - AERONET
KW - Aerosol optical depth
KW - East China
KW - MODIS/Terra
KW - Ångström
UR - https://www.scopus.com/pages/publications/84887867259
U2 - 10.1117/12.2021853
DO - 10.1117/12.2021853
M3 - 会议稿件
AN - SCOPUS:84887867259
SN - 9780819497192
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Remote Sensing and Modeling of Ecosystems for Sustainability X
PB - SPIE
T2 - Remote Sensing and Modeling of Ecosystems for Sustainability X
Y2 - 26 August 2013 through 29 August 2013
ER -