RUSWET-GRASS-6STA-FREEZING

RUSWET-GRASS-6STA-FREEZING

DEPTH OF FROZEN SOIL LAYER FROM THE

SIX RUSSIAN STATIONS USED IN THE ROBOCK ET AL. (1995) STUDY

Alan Robock
Department of Environmental Sciences,
Rutgers, The State University of New Jersey

Konstantin Vinnikov
Department of Meteorology, University of Maryland

C. Adam Schlosser
Center for Ocean-Land-Atmosphere Studies

Nina A. Speranskaya
State Hydrological Institute, St. Petersburg, Russia

February 14, 1997

Robock et al. (1995) used 6 stations from the Vinnikov and Yeserkepova (1991) 50-station archive (also in the 130-station archive) to demonstrate that land surface models, when forced with actual meteorological and actinometric data, can be evaluated by comparison with actual soil moisture, snow depth, albedo, and net radiation observations. The depth of frozen soil layers data are described here. The forcing and other validation data and a subset of the soil moisture data are also available. These data have been used by a number of land surface groups to exercise their models, and we encourage further use of these data by others.

There are six files of data, each corresponding to one particular station:

Yersh.frz = Yershov
Tulun.frz = Tulun
Uralsk.frz = Uralsk
Kost.frz = Kostroma
Khab.frz = Khabarovsk
Ogurt.frz = Ogurtsovo

The data are arranged as follows: A 24-line block consists of a year's worth of soil freezing and melting data. One line of data represents a month's worth of measurements. Both freezing and melting measurements are taken on the 5th, 10th, 15th, 20th, 25th, and the last day of each month (as far as the EXACT time of the day, I don't know but you could probably assume it near the middle of the day). To read in ONE MONTH'S worth of soil freezing/melting data, use the following format in FORTRAN: 
      read (unit#,15) freezedepth
      read (unit#,15) meltdepth
15    format(6f4.0)

A two-line block of data represents one month of data with the top line the freezing data and the bottom line the melting data. Units of depth are in CENTIMETERS.

For the MELTING DATA, a value of '200' is used to denote that the soil is COMPETELY melted.

Missing data or measurement not taken are denoted by a value of '9999'.

REFERENCES

Robock, Alan, Konstantin Ya. Vinnikov, C. Adam Schlosser, Nina A. Speranskaya, and Yongkang Xue, 1995: Use of midlatitude soil moisture and meteorological observations to validate soil moisture simulations with biosphere and bucket models. J. Climate, 8, 15-35. ABSTRACT

Vinnikov, K. Ya. and I. B. Yeserkepova, 1991: Soil moisture: empirical data and model results. J. Climate, 4, 66-79.

For additional information, please contact:

C. Adam Schlosser
Center for Ocean-Land-Atmosphere Studies
4041 Powder Mill Rd., Suite 302
Calverton, MD 20705
Phone:(301) 595-7000
E-mail: adam@cola.iges.org

OR
Dr. Konstantin Ya. Vinnikov OR Prof. Alan Robock
Department of Meteorology Department of Environmental Sciences
University of Maryland Rutgers, The State University of New Jersey
College Park, Maryland 20742 USA New Brunswick, New Jersey 08901 USA
Phone: (301) 405-5382 Phone: (732) 932-9478
Fax: (301) 314-9482Fax: (732) 932-8644
E-mail: kostya@atmos.umd.edu E-mail: robock@envsci.rutgers.edu


TO DOWNLOAD THE DATA, get the complete contents of:

 http://climate.envsci.rutgers.edu/soil_moisture/DOWNLOAD/RUSWET-GRASS-6STA/freez ing

Prepared by Alan Robock (robock@envsci.rutgers.edu) and Govindarajalu Srinivasan (srini@envsci.rutgers.edu)
Last updated on February 9, 1999