HR: 1340h
AN: H33E-0509    [Abstracts]
TI: Lidar Measurement of Boundary Layer Evolution to Determine Sensible Heat Fluxes
AU: * Nichols, J J
EM: jennifer-nichols@uiowa.edu
AF: IIHR - Hydroscience & Engineering, University of Iowa 3007 Sierra Court SW, Iowa City, IA 52240 United States
AU: Eichinger, W E
EM: william-eichinger@uiowa.edu
AF: IIHR - Hydroscience & Engineering, University of Iowa 3007 Sierra Court SW, Iowa City, IA 52240 United States
AU: Cooper, D I
EM: dcooper@lanl.gov
AF: Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545 United States
AU: Hipps, L E
EM: biomet@cc.usa.edu
AF: Department of Plants, Soils and Biometeorology, Utah State University, Logan, UT 84322 United States
AU: Holder, H E
EM: heidi.holder@duke.edu
AF: IIHR - Hydroscience & Engineering, University of Iowa 3007 Sierra Court SW, Iowa City, IA 52240 United States
AU: Kustas, W P
EM: bkustas@hydrolab.arsusda.gov
AF: U.S. Department of Agriculture, Hydrology and Remote Sensing Laboratory, Beltsville, MD 20705 United States
AU: Prueger, J H
EM: prueger@nstl.gov
AF: U.S. Department of Agriculture, National Soil Tilth Laboratory, Ames, IA 50011 United States
AB: The estimation of large scale fluxes of heat and water vapor is crucial for a number of reasons, including weather prediction, climate, agriculture, and water resources management. It is known that these fluxes are not uniform and that the distribution of the surface heat fluxes is a major factor in producing and modifying mesoscale atmospheric flows, turbulence and evaporation. Local variability in the values is the result of variations in soil type, moisture content, type of vegetative cover, and wind speed, among other factors. Obtaining high quality data requires expensive equipment that needs periodic maintenance and attention. So while point sensors cannot be extensively deployed because of cost, conventional measurements represent the surface fluxes over very limited areas. This work evaluates a method where, with a relatively simple, vertically staring lidar, larger scale estimates of the sensible heat flux can be inferred. The estimation of a spatially integrated sensible surface heat flux and the determination of regional heat fluxes over heterogeneous land surfaces is needed to address a number of problems concerning long-range and mesoscale transport models of pollutants and parameterizations in climate models.
DE: 1800 HYDROLOGY
DE: 1818 Evapotranspiration
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0315 Biosphere/atmosphere interactions
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting