Laura Riihimaki^1,2, Larry K Berg³, Joseph Sedlar^2,4, Ying Liu⁵ and Kathleen O Lantz^1,2, (1)Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States, (2)NOAA, ESRL Global Monitoring Division, Boulder, CO, United States, (3)Pacific Northwest National Laboratory, Atmospheric Sciences & Global Change Division, Richland, WA, United States, (4)CIRES, University of Colorado Boulder, Boulder, CO, United States, (5)Pacific Northwest National Laboratory, Richland, WA, United States