CEOP/EOP-1 GAPP SGP Hourly Soil Heat Flux, Moisture, and Temperature Data Set
1.0 Contact Information
1.1 UCAR/JOSS Contact
Steven F Williams
Data Specialist
UCAR/JOSS
P.O. BOX 3000
Boulder, CO, USA, 80307-3000
Telephone: 303-497-8987
Facsimile: 303-497-8158
E-Mail Address: sfw@ucar.edu
1.2 ARM EBBR Contact
David R. Cook
Argonne National Laboratory
9700 South Cass Avenue
Building 203
Argonne, IL 60439.
Phone: (630) 252-5840
FAX: (630) 252-5498
E-mail: drcook@anl.gov
1.3 ARM SWATS Contact
Chad Bahrmann
CIMMS
University of Oklahoma
100 E. Boyd St., Rm. 1110
Norman, OK 73019-1011
Phone: (405) 325-1855
Fax: (405) 325-7614
Email: cbahrmann@ou.edu
2.0 General Description
This data set contains the Coordinated Enhanced Observing Period (CEOP)
Enhanced Observing Period 1 (EOP-1) Global Energy and Water Cycle Experiment
(GEWEX) Americas Prediction Project (GAPP) Southern Great Plains (SGP)
Hourly Soil Heat Flux, Moisture, and Temperature Data Set. This data set contains
hourly soil heat flux (0, 5cm depth), soil temperature (5, 15, 25, 35, 60, 85, 125,
175cm depths), and soil moisture (5, 15, 25, 35, 60, 85, 125, 175cm depths)
data. This data set contains hourly data from 24 Department of
Energy (DOE) Atmospheric Radiation Measurement (ARM) Southern Great Plains
(SGP) stations for the CEOP EOP-1 time period (01 July 2001 to 30 September
2001). The University Corporation for Atmospheric Research/Joint Office for
Science Support (UCAR/JOSS) did not perform quality control processing on this
data set.
3.0 Detailed Data Description
The data comprising this data set are also available on-line in native format at
www.joss.ucar.edu/ghp/ceopdm/archive/eop1_data/index.html
under the heading CEOP EOP-1 "Native Format" Reference Site Data Sets, GAPP.
This composite data set is composed of data from two sources which report
data at different frequencies. It was developed by the merging of soil heat
flux data from the Energy Balance Bowen Ratio (EBBR), and soil temperature
and moisture data from the Soil Water and Temperature System (SWATS). These
stations are located at many of the ARM SGP Extended Facilities in southern
Kansas and northern Oklahoma.
3.1 SGP Algorithms
The algorithms used to produce the GAPP SGP native format data are not
currently available.
This hourly data set was formed by extracting the top of the hour observations
from the native format data. More information regarding the sites can be found
under the CEOP Reference Site Station Characteristics link on the UCAR/JOSS
CEOP Data Management page at www.joss.ucar.edu/ghp/ceopdm/.
3.2 Station Information
The following is a complete description of the station information provided
with this CEOP GAPP SGP data set. Table 1 details the station list parameters.
GAPP SGP values for each parameter are listed in brackets at the end of each
line. The beginning and ending dates for the period of coverage are in
Universal Time Coordinated (UTC). The Identification Type field is network
dependent and indicates the source of the Identification field. The Occurrence
field is an integer value used to indicate co-located stations. Note that when
a particular parameter is unknown for a station, either a blank, a question
mark, or all 9's will appear in that parameter's position. For a complete list
of Country, State, and County values, refer to the document in the references
(Section 5.0). Possible platform types and frequency values are listed in
Tables 2 and 3, respectively. Note that only those platform types present in
the CEOP EOP-1 data have been listed.
Table 1
Parameter Description
--------- -----------
Identification ID in data. [SGP]
Identification Type Internal ID number type. [32]
Latitude Station Latitude. [48.31000]
Longitude Station Longitude. [-105.10000]
Occurrence Station occurrence. [0]
Lat/Lon Accuracy Number of digits accuracy
in lat/lon values. [2]
Name Expanded station name. [GAPP:SGP]
Commissioned Flag `(C)' indicates commissioned station,
`(N)' indicates station which is NOT
commissioned. [(N)]
Begin Period of Coverage Beginning date of period of coverage
(YYYYMMDD). [20010701]
End Period of Coverage End date of period of coverage
(YYYYMMDD). [20010930]
Country Country in which station is located. [US]
State State code. [30]
County County code. [???]
UTC offset Hour Offset from UTC time. [0.00]
DST switch 'y' indicates station does switch to
Daylight Savings Time (DST). 'n' indicates
station does not switch to DST. [n]
Platform type Collection Platform. See Table 2. [264]
Reporting Frequency Frequency of data collection. [30min]
Elevation Station elevation. [634]
Fixed/Mobile flag Flag indicating if station has fixed
location. 'f' indicates a fixed station.
'm' indicates a mobile station. [f]
Table 2
Platform Type Description
------------- -----------
264 CEOP Reference Site Platform
Table 3
Reporting Frequency
-------------------
varies by site
3.3 Detailed Format Description
The CEOP EOP-1 GAPP SGP Hourly Soils Data Set contains 11 metadata
parameters followed by parameter values for 26 soils depths (i.e.,
0,2,3,4,5,6,7,8,10,15,16,20,25,30,32,35,40,45,50, 60,64,85,100,125,150,175
cm). The metadata parameters describe the station location and time at
which the data were collected and the record type. The record type
describes the type of data found on that record and is described in the
Table 4 below. The time of observation is reported both in Universal Time
Coordinated (UTC) Nominal and UTC actual time. Days begin at UTC 0100 and
end at UTC 0000 the following day. Note that missing parameter values are
indicated by "-999.99". The table below details the parameters in each
record.
Parameters Units
---------- -----
Date of Observation UTC Nominal
Time of Observation UTC Nominal
Date of Observation UTC Actual
Time of Observation UTC Actual
CSE Identifier Abbreviation of CSE name
Reference Site Identifier Abbreviation of Site name
Station Identifier Reference Site Dependent
Latitude Decimal degrees, South is negative
Longitude Decimal degrees, West is negative
Station Elevation Meters
Record Type Type of data in current record.
See Table 4.
Parameter Values Parameter Values for 26 depths.
Table 4
Record Type Description
------------- -----------
SoilHtFlux Soil heat flux in W/m2
SoilMoist Volumetric soil water content in percent
SoilTemp Soil temperature in Celsius
3.4 Data Remarks
This data set contains only the hourly observations for the CEOP EOP-1
time period. This data set is also available on-line in native format at
http://www.joss.ucar.edu/ghp/ceopdm/ under the link "CEOP EOP-1 Reference
Site Data Sets".
4.0 Quality Control Processing
UCAR/JOSS performed limited gross limit and visual checks on this data set.
No data values have been changed.
4.1 ARM Data Quality Reports
4.2 ARM EBBR Data Quality Reports
4.2.1 ARM_DQR_20010401_20010823.html
4.2.2 ARM_DQR_20010401_20011005.html
4.2.3 ARM_DQR_20010401_20010823.html
4.2.4 ARM_DQR_20010401_20010823.html
where
ARM_DQR is the type of file
20010401 is the start date of the earliest quality report
in the file
20010823 is the end date of the latest quality report in
the file
4.3 ARM SWATS Data Quality Reports
None.
5.0 References
Bolton, D., 1980: The computation of equivalent potential temperature.,
Mon. Wea. Rev., 108, pp 1046-1053.
Department of Commerce - National Institute of Standards and Technology
(NIST), 1985: Federal Information Processing Standards Publication)
10-3 Countries, Dependencies, & Areas of Special Sovereignty.
Department of Commerce - NIST, Washington, DC.
Energy Balance Bowen Ratio (EBBR),
www.arm.gov/docs/instruments/static/ebbr.html; September 6, 1999
FIFE Bowen Ratio Surface Flux: Smith Data Set Guide Document,
http://www-eosdis.ornl.gov/FIFE/Datasets/Surface_Flux/Bowen_Ratio_Smith.html;
September 8, 1999
Wexler, A., and W. A. Wildhack, 1963: Humidity and Moisture.
Vol. 3: Fundamentals and Standards. Reinhold Publ. Corp., 562 pp.