Full Column Greenhouse Gas Profiles Measured with AirCore at the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) Site
M.L. Fischer1, C. Sweeney2, A. Karion2, J. Higgs3, T. Newberger2, S. Wolter2, S. Biraud1, R. Chadwick4, P. Wennberg5, D. Wunch5 and P. Tans4
1Lawrence Berkeley National Laboratory, Berkeley, CA 94720; 510-486-5539, E-mail: email@example.com
2Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309
3Science and Technology Corporation, Boulder, CO 80305
4NOAA Earth System Research Laboratory, Boulder, CO 80305
5California Institute of Technology, Pasadena, CA 91125
The vertical distributions of CO2, CH4, and other greenhouse gases (GHGs) provide important constraints for the determination of terrestrial and ocean sources and sinks of carbon and other biogeochemical processes in the Earth system. In situ measurements of vertical profiles of GHGs also have high value for evaluating accuracy and clear-sky bias of remote sensing from ground-based and satellite-borne platforms. Here, we report results from a collaborative measurement campaign between the Department of Energy (DOE) Biological and Environmental Research Program, and the NOAA Earth System Research Laboratory to quantify the vertically resolved distribution of atmospheric carbon-cycle gases (CO2, CH4, and CO) throughout 99% of the atmospheric column. To accomplish these measurements, a long coiled tube (or Aircore) is lofted to the stratosphere (~ 30km) on a weather balloon, and then collects a vertically resolved sample of air on descent. In 2012, we conducted 6 successful Aircore flights from the DOE/ARM Southern Great Plains Facility near Lamont, Oklahoma. Comparisons show good agreement collocated profiles obtained with ARM aircraft in the lower half of the atmospheric column, and with column-averaged mixing ratios from ground-based Total Carbon Ccolumn Observing Network remote-sensing. In the coming year, we plan to continue observations and begin a transition from research-mode to operational balloon-borne sampling including semi-automated recovery and on-site gas analysis at ARM-SGP.