Laura Riihimaki¹, R. Michael Reynolds², Charles N. Long¹, Jim Wendell³, Emiel Hall¹ and Erol Cromwell⁴, (1)Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States, (2)RMR Co., Seattle, WA, United States, (3)Global Monitoring Division, NOAA Earth System Research Laboratory, Boulder, CO, United States, (4)Pacific Northwest National Laboratory, Richland, WA, United States