Utilization of MODIS AOD data for PM2.5 monitoring

Authors: Zhiming Yang*, North Carolina Central University, Harris Williams, North Carolina Central University
Topics: Remote Sensing, Environmental Science, Geographic Information Science and Systems
Keywords: AOD-PM2.5, correlation, spatial, temporal
Session Type: Paper
Day: 4/14/2018
Start / End Time: 8:00 AM / 9:40 AM
Room: Bayside A, Sheraton, 4th Floor
Presentation File: No File Uploaded

Current air particular matter (PM)2.5 monitoring in U.S. is limited in spatial resolution due to high operation and maintenance costs. There were numerous studies on the use of Moderate Resolution Imaging Spectroradiometer (MODIS) AOD for PM2.5 monitoring. These attempts were often hampered due to a poor spatial AOD-PM2.5 correlation. The purpose of this study was to develop a new approach to employ MODIS AOD data for PM2.5 monitoring in NC. In this study, Terra MODIS AOD data (Collection 6) collected at 3km and 10km level in 2011 to 2012 were ordered and downloaded from the Unites States Geological Survey (USGS) web site. A new AOD product with 1km spatial resolution retrieved by the multi-angle implementation of atmospheric correction (MAIAC) was downloaded from the NASA web site. Hourly PM2.5 data for each PM2.5 station in NC was requested from the U.S EPA AirNow web site. A temporal AOD-PM2.5 correlation was examined for each AirNow PM2.5 station in NC at 1km, 3km and 10km level respectively in 2011 and 2012. The significance of all correlations was tested at 95% confidence level for each station in each year. It was found that the temporal correlation between MODIS AOD value and ground PM2.5 concentration was statistically significant for majority of PM2.5 monitoring stations at 1km, 3km and 10km level in both 2011 and 2012. This suggests that it is possible to use MODIS AOD data to understand a spatial pattern of PM2.5 at both city and state level.

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