Atmospheric Forcing Datasets Products

To access these data, click on the DOI: 10.7924/G8RN35S6

Report:
The Integrated Precipitation and Hydrology Experiment - Hydrologic Applications for the Southeast US (IPHEx-H4SE) Part II: Atmospheric Forcing and Topographic Corrections

The atmospheric forcing data are extracted from the North American Regional Reanalysis (NARR) products originally at 32-km spatial resolution and 3-hour temporal resolution. Atmospheric forcing datasets include air temperature, air pressure, specific humidity, wind velocity at 10m above ground, and downward shortwave and longwave radiation at surface. Elevation adjustments and corrections to near-surface variables are applied between NARR envelope terrain and local terrain at every time-step based on predicted atmospheric conditions (e.g. using dynamic lapse rates). Special bias corrections for downward shortwave radiation are applied through dynamical adjustment, accounting for localized elevation and topographic effects. The temporal interpolation for shortwave radiation is integrated in the topographic correction to capture the local diurnal solar cycle based on solar zenith angle.

Table - Summary of the Atmospheric Forcing Datasets

Data Source

Input Fields

Variable Name

SIZE

FORMAT

Unit

NARR

Specific humidity at 10m ABG

SpecHumi_10m.bin

N×M×T

BIN

kg/kg

Air temperature at 10m ABG

AirTemp_10m.bin

N×M×T

BIN

K

Air pressure at 10m ABG

AirPressure_10m.bin

N×M×T

BIN

mb

Wind velocity at 10m ABG

WindSpeed_10m.bin

N×M×T

BIN

m/s

Incoming longwave radiation at surface

DLWR_surf.bin

N×M×T

BIN

W/m 2

Incoming shortwave radiation at surface

DSWR_surf.bin

N×M×T

BIN

W/m 2

  • Elevation Correction to Air Temperature, Air Pressure, Specific Humidity at 10m above ground, and Downward Longwave Radiation

Flowchart of Elevation Correction to Atmospheric Forcing Datasets

Flowchart of Elevation Correction to NARR Fields

  • Topographic Correction to Downward Shortwave Radiation at surface

Radiation Flowchart
Flowchart of Elevation Correction to NARR Shortwave Radiation