159 Measurement of Energy and Gas Fluxes in Agricultural Systems

Oral Session
A03 Agroclimatology & Agronomic Modeling

The eddy covariance method is an important tool in measuring energy, carbon, and trace gas (ammonia and methane) fluxes in the surface boundary layer. Interest in this approach has increased in recent years due to the availability of equipment. The challenge is now to understand the proper use of these systems. The papers in this session will address aspects of measurement techniques, data processing, data corrections, flux footprint analysis, and ancillary data needed for the correct measurement of fluxes using eddy covariance technique in agricultural systems, along with results of specific studies.

Tuesday, November 2, 2010: 1:10 PM-3:30 PM
Long Beach Convention Center, Room 102C, First Floor

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Presiders:
Nithya Rajan and Gerald Flerchinger
1:10 PM
Introductory Remarks
1:15 PM
Latent Heat Sink in Soil Heat Flux Measurements.
Joshua L. Heitman, North Carolina State University; Robert Horton, Iowa State University; Thomas Sauer, USDA-ARS National Laboratory for Agriculture & the Environment; Tusheng Ren, China Agricultural University; Xinhua Xiao, Iowa State University; Pukhraj Deol, North Carolina State University
1:30 PM
Quantifying the Diffusion Leakages in a Li-6400 Gas Exchange System and Their Effects On the Parameterization of the Coupled Photosynthesis-Stomatal Conductance-Transpiration Model.
Qingguo Wang, University of Maryland; David Fleisher, USDA-ARS Crop Systems and Global Change Laboratory; Vangimalla Reddy, USDA-ARS Crop Systems and Global Change Laboratory; Dennis Timlin, USDA-ARS; Jong Ahn Chun, USDA-ARS Crop Systems and Global Change Laboratory
1:45 PM
Carbon Fluxes From Continuous Cotton and Pasture for Grazing in the Texas High Plains.
Nithya Rajan, Texas AgriLife Research adn Extension Center; Stephan Maas, Texas Tech University; James C. Kathilankal, Oregon State University
2:15 PM
2:00 PM
Break
2:30 PM
Closure of Surface Energy Balance for Agricultural Fields Determined From Eddy Covariance Measurements.
Stephan Maas, Texas Tech University; Nithya Rajan, Texas AgriLife Research and Extension Center; James C. Kathilankal, Oregon State University
2:45 PM
Measurement and Modeling of Surface Energy Fluxes within Rangeland Ecosystems.
Gerald Flerchinger, USDA-ARS; Danny Marks, USDA-ARS; Michele Reba, USDA-ARS
3:00 PM
Discussion
3:15 PM
Adjourn