The field campaign is officially over. Maria flew back to Seattle yesterday. She sent about 320 samples back to Seattle (see the image below of the box of samples that arrived today, evidence of her hard work). We will be measuring the isotopic composition of the nitrate in the snow and aerosol samples, and the light absorption on the filters. These measurements are probably a couple of months worth of work, so there is still a lot to be done. We will post lab notes describing the laboratory work after we get started. Thanks again for helping to make this all possible!