VIC Global Hydrologic Simulations

2-Degree Resolution, Published in 2001


Mean Seasonal
	     Evapotranspiration (uncalibrated)


Background

The Variable Infiltration Capacity (VIC) model was used to simulate the global land surface hydrological cycle from 1980-1993. The modeling study was done at a daily time step and at a spatial resolution of 2 x 2 degrees. Details can be found in three journal articles in the Journal of Climate and Climatic Change that resulted from this study. Most of the data sets are described in the first two papers in the series:
  1. Bart Nijssen, Reiner Schnur, and Dennis P. Lettenmaier, 2001: Global retrospective estimation of soil moisture using the Variable Infiltration Capacity land surface model, 1980-93, Journal of Climate, 14(8), 1790-1808, doi: 10.1175/1520-0442(2001)014<1790:GREOSM>2.0.CO;2.

  2. Bart Nijssen, Greg O'Donnell, Dennis P. Lettenmaier, Dag Lohmann, and Eric F. Wood, 2001: Predicting the discharge of global rivers, Journal of Climate, 14(15), 3307-3323, doi: 10.1175/1520-0442(2001)014<3307:PTDOGR>2.0.CO;2.

  3. Bart Nijssen, Greg M. O'Donnell, Alan F. Hamlet, and Dennis P. Lettenmaier, 2001: Hydrologic sensitivity of global rivers to climate change, Climatic Change, 50(1-2), 143-175, doi: 10.1023/A:1010616428763.

This web site provides access to the data sets developed as part of this study, in particular:

Data Sets

All data are archived in NetCDF format. The NetCDF home page provides information regarding the data format and links to software that can be used to read and write NetCDF files.

Variable Descriptions

For a full explanation and background of the study, the user is referred to the published papers. This section provides only a very brief description of each of the variables in the data sets distributed through this web site.

Model Forcing Data, 1979-1993

Year Meteorological Variable
Precipitation Minimum Temperature Maximum Temperature Wind Speed Vapor Pressure Downward Shortwave Net Longwave
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
Monthly 1979-1993

Model Derived Variables, 1980-1993 (uncalibrated, see paper 1)

Year Derived Variable
Evapotranspiration Runoff Snow Water Equivalent Soil Moisture Storage Total Storage
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
Monthly 1980-1993

Model Derived Variables, 1980-1993 (calibrated, see paper 2)

Year Derived Variable
Evapotranspiration Runoff Snow Water Equivalent Soil Moisture Storage Total Storage
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
Monthly 1980-1993

Miscellaneous Data

Data set Download
Land-sea mask
Depth of the top two soil layers (uncalibrated - paper 1)
Storage capacity of the top two soil layers (uncalibrated - paper 1)
Depth of the top two soil layers (calibrated - paper 2)
Storage capacity of the top two soil layers (calibrated - paper 2)

References

Bras, R. A., 1990: Hydrology: An introduction to hydrologic science. Addison-Wesley, 643 pp.

Kimball, J. S., S. W. Running, and R. R. Nemani, 1997: An improved method for estimating surface humidity from daily minimum temperature. Agric. For. Meteor., 85, 87-89.

Thornton, P. E. and S. W. Running, 1999: An improved algorithm for estimating incident daily solar radiation from measurements of temperature, humidity, and precipitation. Agric. For. Meteor., 93, 211-228.


Bart Nijssen
Last modified: Tue Apr 2 14:11:03 2013