OHD/HL/DMIP - Observed Energy Field

These hourly meteorological data for 8 basins in the DMIP domains are derived from the 1/8 degree gridded data files developed at the University of Washington. These files are named xxxxxxxx.dat, where xxxxxxxx are the 8-digit USGS basin ID. The correspondence between basin names and USGS ID are as follows:

  03069500  CHEAT RIVER NEAR PARSONS, WV
  07194800  ILLINOIS RIVER AT SAVOY, ARK.
  07195500  ILLINOIS RIVER NEAR WATTS, OK
  07196000  FLINT CREEK NEAR KANSAS, OK
  07196500  ILLINOIS RIVER NEAR TAHLEQUAH
  07196973  PEACHEATER CREEK AT CHRISTIE, OK (no data for this basins) 
  07197000  BARON FORK AT ELDON, OK
  07189000  ELK RIVER NEAR TIFF CITY, MO
  07332500  BLUE RIVER NEAR BLUE, OK

The data are hourly (one row for each hour) beginning January 1, 1992, and continuing through July 31, 2000.

Each file contains 9 columns of data:

    1) date and hour (in yyyymmddhh format)
    2) precipitation (mm) (see note below)
    3) air temperature  (C)
    4) incoming shortwave radiation (W/m^2)
    5) incoming longwave radiation (W/m^2)
    6) atmospheric density (kg/m^3)
    7) atmospheric pressure (kPa)
    8) atmospheric vapor pressure (kPa)
    9) wind speed (m/s)

Note: The precipitation data provided here are different from the NEXRAD data. It is recommended that NEXRAD data be used for DMIP.

For a more complete description of the source of these data, please see:
http://www.hydro.washington.edu/SurfaceWaterGroup/Data/gridded/index.html

Brief descriptions of the data:
2) NCDC Cooperative Observer station data, gridded to the grid cell centers. Each daily precipitation total, for this dataset, is simply divided into 24 equal increments.

3) Maximum and minimum air temperature is also from NCDC Cooperative Observer stations, with an asymmetric hermite polynomial fitted through these to estimate hourly temperature.

4) Incoming shortwave is parameterized from the daily max/min temperatures and dew point, following Thornton and Running (1999)

5) Incoming longwave is calculated following Bras (1990), using air temperature, humidity, and atmospheric transmissivity (produced in 3).

6) Atmospheric density is estimated according to Shuttleworth (1993)

7) Atmospheric pressure is assumed constant here.

8) Vapor pressure is estimated iteratively using Kimball (1997) and Thornton and Running (1999).

9) Wind speed is the average daily 10m wind speed from NCEP/NCAR Reanalysis (resultant of u- and v-wind components), interpolated to the 1/8 degree cell centers.
 
 
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