HR: 1340h
AN: B43D-1580    [Abstracts]
TI: Investigation of the Spatial Heterogeneity and Fluxes of Carbon Dioxide Using a Lagrangian Approach From an Aircraft
AU: * Martins, D K
EM: dmarti18@purdue.edu
AF: Purdue University, 560 Oval Dr., Lafayette, IN 47907, United States
AU: Sweeney, C
EM: colm.sweeney@noaa.gov
AF: National Oceanic and Atmospheric Administration, 325 Broadway Ave., Boulder, CO 80301, United States
AU: Stirm, B H
EM: bstirm@purdue.edu
AF: Purdue University, 560 Oval Dr., Lafayette, IN 47907, United States
AU: Shepson, P B
EM: pshepson@purdue.edu
AF: Purdue University, 560 Oval Dr., Lafayette, IN 47907, United States
AB: Aircraft measurements of CO₂, sensible heat, and 3-dimensional winds were conducted as part of the Mid- Continent Intensive campaign of the North American Carbon Program, in June of 2007. These "top-down" atmospheric budget observations were used to assess the horizontal and vertical spatial heterogeneity of CO₂ concentrations throughout the boundary layer and the lower free troposphere and to compare with observed "bottom-up" budgets as measured by a network of tall towers surrounding a predominately agricultural landscape in Iowa (USA). Regional aircraft-based CO₂ fluxes were estimated using a Lagrangian approach by measuring a net drawdown of mixed-layer averages of CO₂ concentration from mid-morning to late afternoon due to primary productivity in the region. The results from over 53hrs of flights spanning 11 days in June 2007 are presented. A statistical analysis of the spatial variance of CO₂ mixing ratios and the application to ecosystem exchange and transport models are discussed.
UR: http://ring2.psu.edu/
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0426 Biosphere/atmosphere interactions (0315)
DE: 0428 Carbon cycling (4806)
DE: 1626 Global climate models (3337, 4928)
DE: 1631 Land/atmosphere interactions (1218, 1843, 3322)
SC: Biogeosciences [B]
MN: 2007 Fall Meeting