The June 2007 CLASIC and NACP Experiments Carbon fluxes, soil moisture, and land surface-atmosphere interaction
In June 2007, a regional campaign will take place in the U.S. Southern Great Plains (SGP) to estimate surface fluxes of CO2 , water, and energy at 1 to 100 km scales. The goal of this campaign is to understand the influence of land cover, moisture gradients, and atmospheric transport on these fluxes and their estimation. As part of the North American Carbon Program (NACP) we will focus on comparing top-down aand bottom-up flux estimates.
This project is part of the Cloud and Land Surface Interaction Campaign (CLASIC ) and NACP.
This web page describes the experiments planned during CLASIC, June 9-29, 2007. Click here for ongoing carbon cycle measurements.
Cessna 206
CIRPAS Twin Otter
Continuous CO2 and CO concentrations (CO and CH4 from NASA's Argus):
NOAA-ESRL 12-flask samplers
Flasks for high precision 14 CO2
Large volume samples for randon concentration
Land-based Measurements
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2 , Water, and Energy Fluxes and Surface Forcung for CLASIC ("Bottom up")
Land-surface fluxes of energy, water, and CO2 will be modeled at 250 m resolution and aggregated to 10 km using a land surface model (ISOLSM), MODIS data, and Mesonet meteorological forcing. Goal 1. Produce fine scale, tested, land surface forcing maps for CLASIC Goal 2. Produce regional CO2 flux estimates, to compare with top-down estimates based on boundary layer budgeting and inverse modeling.
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There will be three Super Sites with eddy flux towers in the major land cover types (winter wheat, pasture, oak forest, summer crops).
Duke HOP
The Duke Helicopter Observation Platform (HOP) will measure CO2 , water, and energy fluxes in the boundary and surface layers. layer, including the surface layer a few meters above the surface. PI: Roni Avissar.
Duke FACE
Soil Moisture will be studied with airborne observing systems, including PSR and MODIS Airborne Simulator and JPL Passive/Active L and S band (v2). The ER-2 is flying. [More info ]
NASA ER2
The NASA ER-2 will be equipped with downward looking cloud (95-GHz) and precipitation (3-cm) radars, as well as sensors to generate high resolution fields of soil moisture for the region.
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To improve models of cloud-induced fluxes and entrainment, airborne measurements of CO2 and related species in the boundary layer and free troposphere, made on days with fair weather cumulus, will be analyzed with tracer-transport and atmospheric dynamics models.
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2 Flux Estimation Using Lagrangian Flights
We will use atmospheric concentration data to estimate surface fluxes and understand atmospheric transport. Planned approaches include:
Forward modeling of regional meteorology and CO2 concentrations using mesocale models (MM5, SIB-RAMS) with embedded CO2 -tracers;
Boundary layer budget models of varying complexity; and
Inverse modeling using STILT
Fossil Fuel Emissions Southern Great Plains
A weekday in June 2002
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Margaret S. Torn, William J. Riley, Marc L. Fischer, Sébastien C. Biraud. Lawrence Berkeley National Laboratory
Tom J. Jackson. USDA/ARS Hydrology and Remote Sensing Laboratory
Ron Avissar. Duke University
Dave Billesbach. University of Nebraska,Lincoln
Colm Sweeney and Peter Tans. NOAA/ESRL Global Monitoring Division
Max Lowenstein and Jimena Lopez. NASA-Ames Research Center
Joe A. Berry. Carnegie Institution of Washington
Mark Miller. Brookhaven National Laboratory
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ARM web page
ARM CLASIC web page
ESD ARM Carbon web page
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This work was supported primarily by the Atmospheric Radiation Measurement program, Office of Science, U.S. Department of Energy, with additional support and collaboration from USDA, NASA, and NOAA.
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This work was supported primarily by the Atmospheric Radiation Measurement program, Office of Science, U.S. Department of Energy, with additional support and collaboration from USDA, NASA, and NOAA.
