CEOP/EOP-1 NSA Hourly Surface Meteorology, Flux, and Radiation 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 Contacts
1.2.1 Surface meteorological data
Michael Ritsche
DOE/Argonne National Laboratory
9700 S Cass AVE
Argonne, IL 60439
Telephone: 630-252-1554
Facsimile: 630-252-5498
E-Mail Address: mtritsche@anl.gov
1.2.2 Radiation data
Chris Cornwall
National Oceanic and Atmospheric Administration
Air Resources Lab
325 Broadway, R/ARL
Boulder, CO 80305
Telephone: 303-497-7316
Facsimile: 303-497-6546
E-mail Address: Christopher.R.Cornwall@noaa.gov
Web: http://www.srrb.noaa.gov
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) North Slope Alaska (NSA) Hourly Surface Meteorology, Flux, and
Radiation Data Set. This data set contains hourly data from two 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
This data set is also available on-line in 30-minute native format at
http://www.joss.ucar.edu/ghp/ceopdm/ under the link "CEOP EOP-1 Reference
Site Data Sets"
3.1 NSA Algorithms
This hourly data set was formed by extracting the top of the hour observations
from the native format data. The U and V wind components were computed from
wind speed and direction.
More information regarding this site can be found under the CEOP Reference
Site Station Characteristics link on the UCAR/JOSS CEOP Data Management page
at http://www.joss.ucar.edu/ghp/ceopdm/.
More information on the ARM algorithms used to process the native format data
can be found at www.arm.gov/docs/sites/nsa/nsaaao.html.
3.2 Station Information
The following is a complete description of the station information provided
with this CEOP NSA data set. Table 1 details the station list parameters. NSA
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. [NSA]
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. [Other:NSA]
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
-------------------
hourly
3.3 Detailed Format Description
The CEOP EOP-1 NSA Hourly Surface Meteorology, Flux, and Radiation Data Set
contains 10 metadata parameters and 22 data parameters. The metadata
parameters describe the station location and time at which the data were
collected. 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 x details the data 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
Station Pressure Hectopascals (mb)
Dry Bulb Temperature Celsius
Dew Point Celsius
Relative Humidity Percent
Specific Humidity g/kg
Wind Speed m/s
Wind Direction Degrees
U Wind Component m/s
V Wind Component m/s
Total Precipitation mm
Snow Depth cm
Sensible Heat Flux W/m2
Latent Heat Flux W/m2
Incoming Shortwave Radiation W/m2
Outgoing Shortwave Radiation W/m2
Incoming Longwave Radiation W/m2
Outgoing Longwave Radiation W/m2
Net Radiation W/m2
Skin Temperature Celsius
CO2 Flux uMoles/m2/s
Incoming PAR uMoles/m2/s
Outgoing PAR uMoles/m2/s
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.
5.0 References
none