I have been using the Sentinel 2A Aerosol Optical Depth band to follow particulate emissions but only for relative differences in the landscape. I am a retired research plant physiologist from the USDA and recognize I am far afield from my agricultural background. I would like to have quantitative values of PM 2.5 and/or PM10 calculated for each pixel. The 10m resolution of Sentinel 2 AOD is just what I need if it can be calibrated to ground-based PM2.5. Unfortunately there is a very weak correlation between AOD and ground-based PM2.5 using Sentinel 2a images. I have searched all the Sentinel toolboxes as well as tutorials without success. I realize this is processing after image collection. There are ample peer-reviewed articles modeling ground-level PM2.5 using various satellite platforms but well beyond this ‘citizen scientist’ skills.
By comparison, the MODIS satellite imagery has at least 2 websites that provide calculated PM2.5:
I have demonstrated that the MODIS data of PM2.5 ug/m3 is highly correlated to ground-based PM2.5 when there are continuous winds during the day for my region of the mid-Atlantic USA.
Unfortunately, the MODIS spatial resolution is in kilometers and not capable of identifying point-sources of PM emission–my particular interest.
I cannot find a source of such a sponsored model for the ESA and Sentinel 2 data. The MODIS sites make clear they are calculated values and the user takes all responsibility for interpretation, which is fine for my use.
Are there websites that I could access for the calculation of particulate concentration (PM2.5, PM10 or aerosol in general) using Sentinel 2 imagery?
Thank you very much for taking time to respond to my naïve question.
D. Michael Glenn PhD
Retired Plant Physiologist USDA-ARS