HR: 10:20h
AN: B32A-01 INVITED [Abstracts]
TI: The Nature of Clouds and Their Effects on the Surface Radiative Energy Budget
AU: * Long, C
EM: chuck.long@pnl.gov
AF: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352
United States
AU: Ackerman, T P
EM: ackerman@pnl.gov
AF: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352
United States
AU: Gaustad, K
EM: krista.gaustad@pnl.gov
AF: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352
United States
AU: Barnard, J
EM: james.barnard@pnl.gov
AF: Pacific Northwest National Laboratory, PO Box 999, Richland, WA 99352
United States
AU: Turner, D
EM: dturner@ssec.wisc.edu
AF: University of Wisconsin, 1225 W. Dayton St
, Madison, WI 53706
United States
AB:
Recently significant progress has been made in inferring cloud effects and cloud macrophysical properties using surface
measurements of broadband irradiance and basic meteorological variables. These "Flux Analysis" methodologies build on the
original work by Long and Ackerman (2000), who show that these techniques include a high degree of repeatability since both
the clear-sky and all-sky values include the same measuring instrument characteristics.
Examples of the Flux Analysis methodology applied to measurements from various ARM and BSRN sites spanning the years of
available data will be presented. These results include analyses of shortwave (SW) and longwave (LW) all-sky and clear-sky
climatology; SW, LW, and net cloud effects; total (daylight) and LW effective (24 hour) fractional sky cover; cloud
transmissivity and visible optical thickness; and estimates of cloud field effective radiating temperature and radiating
surface height. Preliminary results of the upwelling components of clear-sky and cloud effect will also be presented, and
used to infer the total net surface radiative cloud forcing. Through these examples, the nature of cloudiness and the
resultant influence on the surface radiative energy budget will be described.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0400 BIOGEOSCIENCES
DE: 1615 Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 4805, 4912)
DE: 1878 Water/energy interactions (0495)
SC: Biogeosciences [B]
MN: Fall Meeting 2005