Protocol for computation of surface boundary layer parameters used to determine soil moisture flux from meteorological data collected at LLNL, 1992--93
Starting May 1992, meteorological data is continuously collected for Environmental Restoration Division (ERD) at the LLNL weather-tower site. Mounted on a 2-meter mast are sensors for air temperature, wind speed and direction, relative humidity, net radiation flux, and ground heat flux. Table 1 lists the height of the sensors and the sensor accuracies. These sensors are sampled every second and 15-minute averages are saved by the data logger for retrieval. Average and standard deviation ({sigma}{sub {theta}}) of wind direction are computed by the Campbell logger (Campbell Scientific, Model CR-10) using polar coordinates as described in Yamartino (1984). This report describes the reduction of continuously monitored data from 15-minute averages to hourly averages. The bulk of this report is dedicated to describing the computation of parameters that characterize the surface boundary layer. The ultimate goal is to provide estimates of the amount of evaporation of water from the surface.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 10177264
- Report Number(s):
- UCRL-ID-113516; ON: DE93018906
- Resource Relation:
- Other Information: PBD: Mar 1993
- Country of Publication:
- United States
- Language:
- English
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