National Snow and Ice Data Center (NSIDC), Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado (CU), 449 UCB, Boulder, CO 80309 United States
National Center for Atmospheric Research, PO BOX 3000, Boulder, CO 80307 United States
National Snow and Ice Data Center (NSIDC), Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado (CU), 449 UCB, Boulder, CO 80309 United States