The Site Averaged Neutron Soil Moisture: 1988 (Betts) data set contains the site-averaged product data of the neutron probe soil moisture collected during the 1987-1989 FIFE experiment. Samples were averaged for each site, then averaged for each day. This data set includes only 1988 data.
SITE AVERAGED NEUTRON SOIL MOISTURE: 1988 (BETTS).
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Heat flux, soil heat budget, and soil heat flux.
The Soil Moisture Site averages contain neutron probe data, converted by FIS to a volumetric value, using individual sample density. These values are a profile down to 200 cm if the tube went that deep (i.e., no rock).
Samples were averaged for each site (which often had 5 tubes), and then each site was interpolated to give a value for each day (and to fill in missing days). Then the sites were averaged for each day. Data levels are 200, 180, 160, 140, 120, 100, 80, 60, 50, 40, 30, and 20 cm and the 2 volumetric values for 2.5 and 7.5 cm converted from gravimetric measurements. For 20 and 100 cm the count (k) of sites has been included along with a sum of the actual number of measurements to indicate data density on that day. A blank value means no actual observations; Value is all interpolation.
The 20 cm level data is suspect. The range of neutron probe exceeds 20 cm in dry soil. The 20 cm data has different characteristics in 1987 to 1988; it is inconsistent with the profile in 1987 but not in 1988. A change of measurement protocol is suspected, but the documents show nothing so it is only hearsay.
The 1989 neutron data is so infrequently sampled that the average should be used with caution.
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_neut.
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 SM200 8 "Average % soil moisture at depth of 200 cm" 3 SM180 8 "Average % soil moisture at depth of 180 cm" 4 SM160 8 "Average % soil moisture at depth of 160 cm" 5 SM140 8 "Average % soil moisture at depth of 140 cm" 6 SM120 8 "Average % soil moisture at depth of 120 cm" 7 SM100 8 "Average % soil moisture at depth of 100 cm" 8 SM100_k 8 "Number of sites included in average soil moisture at depth of 100 cm (SM100)" 9 SM100sum 8 "Sum of soil moisture measurements at depth of 100 cm" 10 SM80 8 "Average % soil moisture at depth of 80 cm" 11 SM60 8 "Average % soil moisture at depth of 60 cm" 12 SM50 8 "Average % soil moisture at depth of 50 cm" 13 SM40 8 "Average % soil moisture at depth of 40 cm" 14 SM30 8 "Average % soil moisture at depth of 30 cm" 15 SM20 8 "Average % soil moisture at depth of 20 cm" 16 SM20_k 8 "Number of sites included in average soil moisture at depth of 20 cm (SM20)" 17 SM20sum 8 "Sum of soil moisture measurements at depth of 20 cm" 18 SM7_5v 8 "Volumetric soil moisture for depth of 7.5 cm converted from gravimetric measurements" 19 SM2_5v 8 "Volumetric soil moisture for depth of 2.5 cm converted from gravimetric measurements" 20 SM2_5vk 8 "Number of gravimetric measurements at 2.5 cm included in volumetric conversion" 21 obs_date 8 "Observation date (mm/dd/yyyy)"
Refer to Table 1.
Meteorological Station.
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Jul_Date, SM200, SM180, SM160, SM140, SM120, SM100, SM100_k, SM100sum, SM80, SM60, SM50, SM40, SM30, SM20, SM20_k, SM20sum, SM7_5v, SM2_5v, SM2_5vk, obs_date, year
102, 39, 39, 39, 39, 39, 39, 1, 0, 39, 41, 42, 43, 43, 42, 1, 0, 40, 40, 1, 04/11/1988 103, 38.77, 38.63, 38.6, 38.62, 38.64, 38.43, 2, 1, 38.41, 40.95, 43.1, 44.68, 44.11, 44.38, 2, 1, 40.38, 41.63, 2, 04/12/1988 104, 38.55, 38.26, 38.2, 38.24, 38.28, 37.88, 2, ., 38.12, 40.72, 42.82, 44.29, 43.64, 43.22, 2, ., 40.2, 40.63, 2, 04/13/1988
File names size (bytes) ffoneut88.dat 19000
Data levels are 200, 180, 160, 140, 120, 100, 80, 60, 50, 40, 30, and 20 cm. The 2 volumetric values for 2.5 and 7.5 cm are converted from gravimetric measurements. A count (k) of sites along with a sum of the actual number of measurements to indicate data density on that day is included for the 20 and 100 cm levels.
A blank value indicates no actual observations; value is all interpolation.
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The 1989 neutron data is so fragmentary that it is still being considered.
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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 19, 1997.
FIFE_FFONEU88.
Cite this data set as follows (citation revised on October 1, 2002):
Betts, A. K. 1994. Site Averaged Neutron Soil Moisture: 1988 (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/102.
DAAC Staff
ornldaac@ornl.gov