Smoke and Aerosols Over North America (IMAGE) NASA/Goddard Space Flight Center Caption In North America, Suomi NPP's OMPS detected smoke and aerosols from fires over Canada's Yukon Territories. Aerosol concentrations were very high over the Yukon fires due to a pyrocumulus event that occurred on 11 September. In the image, there is also light brown area of smoke that looks like a letter "C" on its side. The image also shows a low pressure system (the area of spiraled clouds) off the coast of western Canada. Credit Credit: NASA/NOAA, Colin Seftor Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.