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United States Department of Agriculture

Agricultural Research Service

Title: An Overview of the Soil-Moisture-Atmospheric-Coupling-Experiment (Smacex) in Cental Iowa

Authors
item KUSTAS, WILLIAM
item PRUEGER, JOHN
item HATFIELD, JERRY
item Macpherson, Ian - NATL RES COUNCIL CANADA
item Wolde, Mengistu - NATL RES COUNCIL CANADA
item Neale, Chris - UTAH STATE UNIVERSITY
item Eichinger, William - UNIVERSITY OF IOWA
item Cooper, Dan - LOS ALAMOS NATL LAB
item Norman, John - UNIVERSITY OF WISCONSIN
item Anderson, Martha - UNIVERSITY OF WISCONSIN

Submitted to: Proceedings of the Hydrology Conference
Publication Type: Proceedings
Publication Acceptance Date: February 13, 2003
Publication Date: February 15, 2003
Citation: Anderson, M., Norman, J., Kustas, W.P., Prueger, J.H., Neale, C., Macpherson, I., Mecikalski, J., Diak, G. 2003. Comparison of aircraft-and tower-measured fluxes acquired during smacex with predictions from a regional atmosphere-land exchange model. In: Proceedings of the Hydrology Conference, Preprint CD-ROM American Meteorological Society Annual Meeting , February 9-13, 2003.

Interpretive Summary: The Soil Moisture-Atmospheric Coupling Experiment (SMACEX) was conducted in the Walnut Creek Watershed near Ames, Iowa over the period from June 15-July 8, 2002. The study area is representative of a much larger agricultural region in the upper Midwest involved primarily in corn and soybean production. SMACEX is an interdisciplinary investigation involving a diverse set of field measurements and modeling activities funded by the NASA Terrestrial Hydrology Program. Measurements of the coupled exchange of water, carbon and energy between the soil, vegetation and atmosphere included: tower and aircraft-based water, energy and carbon fluxes, atmospheric radiosoundings and acoustic sodar soundings, ground-based Lidar observations of atmospheric boundary layer water vapor densities and heights, and cloud cover, vegetation biomass and cover, remote sensing in the visible, near-IR, thermal and microwave wavelengths from aircraft and satellite platforms. The complementary scale inherent in these measurements will provide the necessary range to investigate local to regional scale impacts of landscape heterogeneity on water, carbon and energy exchanges.

Technical Abstract: The Soil Moisture-Atmospheric Coupling Experiment (SMACEX) was conducted in the Walnut Creek Watershed near Ames, Iowa over the period from June 15-July 8, 2002. The study area is representative of a much larger agricultural region in the upper Midwest involved primarily in corn and soybean production. SMACEX is an interdisciplinary investigation involving a diverse set of field measurements and modeling activities funded by the NASA Terrestrial Hydrology Program. Measurements of the coupled exchange of water, carbon and energy between the soil, vegetation and atmosphere included: tower and aircraft-based water, energy and carbon fluxes, atmospheric radiosoundings and acoustic sodar soundings, ground-based Lidar observations of atmospheric boundary layer water vapor densities and heights, and cloud cover, vegetation biomass and cover, remote sensing in the visible, near-IR, thermal and microwave wavelengths from aircraft and satellite platforms. The complementary scale inherent in these measurements will provide the necessary range to investigate local to regional scale impacts of landscape heterogeneity on water, carbon and energy exchanges.

Last Modified: 9/29/2014
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