The Site Averaged Gravimetric Soil Moisture Data: 1987-1989 (Betts) data set contains the site-averaged product data collected during the 1987-1989 FIFE experiment. Samples were averaged for each site, then averaged for each day. This data set includes data from May 20, 1987, through August 12, 1989.
SITE AVERAGED GRAVIMETRIC SOIL MOISTURE: 1987-1989 (BETTS).
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Heat flux, soil heat budget, and soil heat flux.
Samples were averaged for each site, then each site was interpolated to give a value for each day. Then the sites were averaged for each day. The soil moisture site averages values are at 2.5 cm for the 0-5 cm layer, and 7.5 cm for the 5-10 cm layer.
Multiplying them by a mean bulk density of 1.1 gives representative volumetric soil moisture. Note that in papers prior to Betts and Ball 1997 (see Appendix) (Betts et al 1993, Betts and Ball 1995), an incorrect volumetric conversion was used.
The values in this data set are a profile down to 200 cm if the tube went that deep (i.e., no rock). This data was retrieved directly from the Oak Ridge DAAC. All the originating data, however, should correspond to that on CD-ROM Volume 1, dated May 22, 1994, in directory soilmstr\sm_grav.
Alan K. Betts and John H. Ball
Atmospheric Research
Telephone: (802) 483-2087
Fax: (802) 483-6167
Email: akbetts@aol.com
FIFE Follow-On.
ORNL DAAC User Services Office
Oak Ridge National Laboratory
Telephone: 1-(865)-241-3952
Fax: 1-(865)-574-4665
Email: ornldaac@ornl.gov
You may use these files freely. Please send Alan Betts (akbetts@aol.com) an e-mail if you do, so he can notify you of any updates. Please notify both Alan Betts and the ORNL DAAC of any errors you find.
This data processing was supported by NASA under Contract NAS5-32356 to Alan Betts, and an acknowledgment of the years of work that went into the production of these files would be appreciated in publications based substantially on them.
The FIFE CD-ROM can be cited as D. E. Strebel, D. R. Landis, K. F. Huemmrich, and B. W. Meeson (1994), Collected Data of The First ISLSCP Field Experiment, Vol. 1: Surface Observations and Non-Image Data Sets.
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Ground-based.
Field Investigation.
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The center of the FIFE 15x15 km site is close to 39.05þN, 96.53þW.
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These are point data.
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Table 1. contains a summary of the variables in this data set.
Table 1. Variable Description Variable Name Long Name SAS Type Description
1 Jul_Date 8 "Julian date (day of year 1-366)" 2 SM25 8 "Average % soil moisture at 0-5 cm depth" 3 SM25_k 8 "Number of sites included in average soil moisture at 0-5 cm depth (SM25)" 4 SM25_sum 8 "Sum of soil moisture measurements at 0-5 cm depth" 5 SM75 8 "Average % soil moisture at 5-10 cm depth" 6 SM75_k 8 "Number of sites included in average soil moisture at 5-10 cm depth (SM25)" 7 SM75_sum 8 "Sum of soil moisture measurements at 5-10 cm depth" 8 obs_date 8 "Observation date (mm/dd/yyyy)" 9 year 8 "Year"
Refer to Table 1.
Meteorological Station.
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Jul_Date, SM25, SM25_k, SM25_sum, SM75, SM75_k, SM75_sum, obs_date, year
140, 28.1, 20, 44, 26.02, 20, 44, 05/20/1987, 1987 141, 29.01, 20, ., 26.22, 20, ., 05/21/1987, 1987 142, 29.91, 20, ., 26.43, 20, ., 05/22/1987, 1987 143, 30.82, 20, ., 26.63, 20, ., 05/23/1987, 1987 . . . 102, 44.87, 3, 14, 35.19, 3, 14, 04/11/1988, 1988 103, 39.65, 8, 24, 32.89, 8, 21, 04/12/1988, 1988 104, 39.1, 8, ., 32.65, 8, ., 04/13/1988, 1988 105, 38.55, 8, ., 32.42, 8, ., 04/14/1988, 1988 . . . 200, 27.57, 13, 65, 21.63, 13, 64, 07/19/1989, 1989 201, 24.07, 13, 65, 20.41, 13, 63, 07/20/1989, 1989 202, 20, 13, 64, 18.2, 13, 64, 07/21/1989, 1989 203, 17.48, 13, 64, 17.45, 13, 64, 07/22/1989, 1989
File names size (bytes) ffogrv.dat 17000
This data set is a time series of daily values for the period between May 20, 1987 - August 12, 1989.
The data fields are as follows:
Day, SM25, SM25-k, SM25-sum, SM75, SM75-k, SM75-sum
Where SM25 and SM75 are gravimetric percent soil moisture for soil layers 0-5, 5-10 cm.
Samples were averaged for each site, and then each site was interpolated to give a value for each day. Then the sites were averaged for each day. Fields SM25-k, SM75-k is a count of the sites in the average. SM25-sum, SM75-sum is the sum of the total number of independent measurements on that day. Thus when SM25-sum is blank; there were no measurements on that day at all. The value is pure interpolation, and attention should be paid to the rainfall data before using.
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There are no plans to revisit this data; but let us know of errors.
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ORNL DAAC User Services
Oak Ridge National Laboratory
Telephone: (865) 241-3952
FAX: (865) 574-4665
Email: ornldaac@ornl.gov
ORNL Distributed Active Archive Center
Oak Ridge National Laboratory
Telephone: (865) 241-3952
FAX: (865) 574-4665
Email: ornldaac@ornl.gov
Users may place requests by telephone, electronic mail, or FAX. Data is also available via the World Wide Web at http://daac.ornl.gov.
FIFE data are available from the ORNL DAAC. Please contact the ORNL DAAC User Services Office for the most current information about these data.
This data set is available online via the World Wide Web at http://daac.ornl.gov/, or telnet ornlims.ornl.gov 6493 (128.219.24.108 6493), or eosims.ornl.gov 12345 (128.219.24.108 12345)
Betts and Ball, 1997: FIFE surface climate and site-average data set 1987-1989, J. Atmos. Sci. in press (3rd FIFE special issue)
Betts, A.K., J.H. Ball, and A.C.M. Beljaars, 1993: Comparison between the land surface response of the European Centre model and the FIFE-1987 data. Q.J.R.M.S., 119, 975-1001.
Betts, A.K. and J.H. Ball, 1994: Budget analysis of FIFE-1987 sonde data. J.G.R., 99, 3655-3666.
Betts, A.K. and J.H. Ball, 1995: The FIFE surface diurnal cycle climate. J.G.R. 100, 25679-25693.
Betts A. K. And J. H. Ball, 1997: FIFE surface climate and site-average dataset: 1987-1989. (FIFE special issue 3 J.Atmos. Sci. in press)
Strebel, D. E., D. R. Landis, K. F. Huemmrich, and B. W. Meeson, 1994: Collected data of the First ISLSCP Field Experiment, in Surface Observations and Non-Image Data Sets., Vol 1, CD-ROM, NASA GSFC, Greenbelt, MD 20771
The First FIFE special issue in JGR (November, 1992) contains many important refs by the PI's who collected this data
Contact the EOS Distributed Active Archive Center (DAAC) at Oak Ridge National Laboratory (ORNL), Oak Ridge, Tennessee (see the Data Center Identification Section). Documentation about using the archive and/or online access to the data at the ORNL DAAC is not available at this revision.
A general glossary for the DAAC is located at http://cdiac.esd.ornl.gov/cdiac/glossary.html.
A general list of acronyms for the DAAC is available at http://daac.ornl.gov/acronyms.html.
December 4, 1996 (citation revised on October 1, 2002).
May 16, 1997.
FIFE_FFO_GRV.
Cite this data set as follows (citation revised on October 1, 2002):
Betts, A. K. 1994. Site Averaged Gravimetric Soil Moisture: 1987-1989 (Betts). Data set. Available on-line [http://www.daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. doi:10.3334/ORNLDAAC/97.
DAAC Staff
ornldaac@ornl.gov