For the second time in the last three weeks a storm is dumping over six inches of snow along the east coast of the United States. Clouds hindered AOD retrievals across this region as shown in the MODIS Aqua image below. Regarding air quality, Moderate AQI PM 2.5 levels were experienced mainly across the eastern US, due to the very cold temperatures and strong temperature inversions. The early temperature inversions allow for elevated fine particulate (PM2.5) levels to occur during the overnight and morning hours.
Bottom images show smoke from fires burning in Australia that are being transported over the Tasman Sea towards New Zealand. The weather conditions over Australia are favorable for producing pyrocb events. The RGB image, captured two days ago, is from the MODIS sensor in NASA's Aqua satellite. The right image is the Aerosol Index (AI) product from NASA's Ozone Mapping and Profiler Suite,OMPS, revealing the high aerosol levels associaited with these events. Thanks to Colin Seftor for providing the latest AI results from OMPS.