CEOP/EOP-1 CAMP Northern South China Sea - Southern Japan Hourly Surface Meteorology, Flux, and Radiation Data Set

1.0 Contact Information

1.1 UCAR/JOSS Contact

   Steven F Williams
   Data Specialist
   P.O. BOX 3000
   Boulder, CO, USA, 80307-3000

   Telephone: 303-497-8987
   Facsimile: 303-497-8158
   E-Mail Address:

1.2 Northern South China Sea - Southern Japan Contact

   Tsing-Chang Chen
   Department of Geological and Atmospheric Sciences
   3010 Agronomy Hall
   Iowa State University 
   Ames, IA  USA, 50010

   Phone: (515) 294-9874
   Fax:   (515) 294-2619

2.0 General Description
This data set contains the Coordinated Enhanced Observing Period (CEOP)
Enhanced Observing Period 1 (EOP-1) CEOP Asian-Australia Monsoon Experiment
(CAMP) Northern South China Sea - Southern Japan Hourly Surface Meteorology,
Flux, and Radiation Data Set. This data set contains hourly data from 25
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

3.0  Detailed Data Description

3.1 CAMP Northern South China Sea - Southern Japan Algorithms

3.1.1 Native format data

This data set is also available on-line in hourly native format at
under the heading CEOP EOP-1 "Native Format" Reference Site Data Sets,
CAMP. For a document describing the native format data, see the
Documentation provided at the same site.

3.1.2 CEOP/EOP-1 Hourly Surface Meteorology, Flux, and Radiation format data

This CEOP/EOP-1 CAMP N. South China Sea - Southern Japan Hourly Surface
Meteorology, Flux, and Radiation data set was formed by reformatting the
hourly observations from the native format data. The data are in UTC time. 
The U and V wind components were computed from wind speed and direction. The
dew point was computed from the temperature and relative humidity (Bolton,
1980). Specific humidity was computed from the surface pressure and
calculated dew point using formulas from Wexler and Wildhack (1963). 

More information regarding this site can be found under the CEOP Reference 
Site Station Characteristics link on the UCAR/JOSS CEOP Data Management page. 

3.2 Station Information

The following is a complete description of the station information provided 
with this CEOP CAMP N. South China Sea - Southern Japan data set.  The actual
station information is delivered with the data. Table 1 details the
station list parameters. 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
Identification Type      Internal ID number type
Latitude                 Station Latitude
Longitude                Station Longitude
Occurrence               Station occurrence
Lat/Lon Accuracy         Number of digits accuracy 
                         in lat/lon values
Name                     Expanded station name
Commissioned Flag        `(C)' indicates commissioned station,
                         `(N)' indicates station which is NOT
Begin Period of Coverage Beginning date of period of coverage
End Period of Coverage   End date of period of coverage
Country                  Country in which station is located
State                    State code
County                   County code
UTC offset               Hour Offset from UTC time
DST switch               'y' indicates station does switch to
                         Daylight Savings Time (DST). 'n' indicates 
                         station does not switch to DST
Platform type            Collection Platform. See Table 2
Reporting Frequency      Frequency of data collection
Elevation                Station elevation
Fixed/Mobile flag        Flag indicating if station has fixed
                         location. 'f' indicates a fixed station.
                         'm' indicates a mobile station

Table 2

Platform Type  Description
-------------  -----------
264            CEOP Reference Site Platform

Table 3                                            
Reporting Frequency

3.3  Detailed Format Description
The CEOP EOP-1 CAMP N. South China Sea - Southern Japan 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  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 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
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.

Wexler, A., and W. A. Wildhack, 1963:  Humidity and Moisture.
   Vol. 3: Fundamentals and Standards.  Reinhold Publ. Corp., 562 pp.