Cooperative Institute for Research in Environmental Sciences, 216 UCB, Boulder, CO 80309-0216 United States; NOAA Climate Monitoring and Diagnostics Laboratory, Mailcode R/CMDL-1, 325 Broadway, Boulder, CO 80305-3328 United States
NOAA Climate Monitoring and Diagnostics Laboratory, Mailcode R/CMDL-1, 325 Broadway, Boulder, CO 80305-3328 United States
NOAA Climate Monitoring and Diagnostics Laboratory, Mailcode R/CMDL-1, 325 Broadway, Boulder, CO 80305-3328 United States
NOAA Climate Monitoring and Diagnostics Laboratory, Mailcode R/CMDL-1, 325 Broadway, Boulder, CO 80305-3328 United States
Cooperative Institute for Research in Environmental Sciences, 216 UCB, Boulder, CO 80309-0216 United States; NOAA Climate Monitoring and Diagnostics Laboratory, Mailcode R/CMDL-1, 325 Broadway, Boulder, CO 80305-3328 United States
NOAA Climate Monitoring and Diagnostics Laboratory, Mailcode R/CMDL-1, 325 Broadway, Boulder, CO 80305-3328 United States