HR: 1340h
AN: B43D-1595 [Abstracts]
TI: Regional Carbon Fluxes and Atmospheric Carbon Dynamics in the Southern Great Plains during the 2007 CLASIC intensive
AU: * Biraud, S C
EM: SCBiraud@lbl.gov
AF: Lawrence Berkeley National Laboratory, Earth Science Division
1, Cyclotron Rd., Berkeley, CA 94720, United States
AU: Torn, M S
EM: MSTorn@lbl.gov
AF: Lawrence Berkeley National Laboratory, Earth Science Division
1, Cyclotron Rd., Berkeley, CA 94720, United States
AU: Riley, W J
EM: WJRiley@lbl.gov
AF: Lawrence Berkeley National Laboratory, Earth Science Division
1, Cyclotron Rd., Berkeley, CA 94720, United States
AU: Fischer, M L
EM: MLFischer@lbl.gov
AF: Lawrence Berkeley National Laboratory, Earth Science Division
1, Cyclotron Rd., Berkeley, CA 94720, United States
AU: Billesbach, D P
EM: dbillesbach1@unl.edu
AF: University of Nebraska-Lincoln, 25 L. W. Chase Hall
Biological Systems Engineering Department, Lincoln, NE 68588, United States
AU: Avissar, R
EM: avissar@duke.edu
AF: Duke University, Department of Civil and Environmental Engineering
Box 90287 Hudson Hall, Durham, NC 27708, United States
AU: Berry, J A
EM: joeberry@catalase.stanford.edu
AF: Stanford University, Department of Plant Biology
Carnegie Institution of Washington
260, Panama Street, Stanford, CA 94305, United States
AU: Hirsch, A
EM: Adam.Hirsch@noaa.gov
AF: NOAA/ESRL, Room # GD115
325 Broadway, Boulder, CO 80305, United States
AU: Loewenstein, M
EM: Max.Loewenstein-1@nasa.gov
AF: NASA-Ames Research Center, Argus Instrument Group
Mailstop 245-5, Moffett Field, CA 94035, United States
AU: Lopez, J
EM: jlopez@mail.arc.nasa.gov
AF: NASA-Ames Research Center, Argus Instrument Group
Mailstop 245-5, Moffett Field, CA 94035, United States
AB:
In June 2007, a regional campaign took place in the Southern Great Plains (SGP) to estimate land-atmosphere
exchanges of CO2, water, and energy at 1 to 100 km scales. The primary goals of this campaign were to evaluate
top-down and bottom-up estimates of regional fluxes and to understand the influence of moisture gradients,
surface heterogeneity, and atmospheric transport patterns on these fluxes (and their estimation). The work was
integrated with the Cloud and Land Surface Interaction Campaign (CLASIC), centered on the US DOE
Atmospheric Radiation Measurement (ARM) Program SGP region.
CO2 concentration data were collected from tower and airborne platforms. Eddy flux towers were deployed in the
four major land cover types, distributed over the region's SE to NW precipitation gradient. In
addition, CO2, water, and energy fluxes were observed with the Duke Helicopter Observation Platform (HOP) at
various heights in the boundary layer, including in the surface layer (the few meters near the surface). One aircraft
carried precise CO2, CO, and CH4 continuous measurement systems, and 14C, radon, and NOAA 12-flask
(carbon cycle gases and isotopes) packages. Continuous CO2, CO, and radon concentrations, NOAA 2-flask
package, and isotope diel flasks (14C, 13C, and 18O) were also collected from a centrally located 60 m tower.
Flights were planned to constrain simple boundary layer budget models and to conduct Lagrangian air mass
following experiments.
We present these data in the context of characterizing surface carbon exchanges via bottom-up and top-down
approaches. We also describe results from forward (using MM5-LSM) and inverse (using STILT) modeling to
estimate regional surface carbon and energy fluxes. In addition to characterizing the influence of the land surface
on the atmosphere, the aircraft data (in combination with observations of atmospheric dynamics) provides a very
well characterized southern boundary condition to the NACP Mid-Continent Intensive.
UR: http://esd.lbl.gov/ARMCarbon/
DE: 0402 Agricultural systems
DE: 0428 Carbon cycling (4806)
DE: 0434 Data sets
DE: 0466 Modeling
DE: 0490 Trace gases
SC: Biogeosciences [B]
MN: 2007 Fall Meeting