CEOP/EOP-1 LBA Caxiuana 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 LBA Contact Jose Marengo CPTEC/INPE Rodovia Presidente Dutra, km 39 12630-000 Cachoeira Paulista Sao Paulo, Brazil Telephone: +55 12 560 8464 Facsimile: +55 12 560 8542 E-mail: marengo@cptec.inpe.br 2.0 General Description This data set contains the Coordinated Enhanced Observing Period (CEOP) Enhanced Observing Period 1 (EOP-1) Large Scale Biosphere-Atmosphere Experiment in Amazonia (LBA) Caxiuana Hourly Surface Meteorology, Flux, and Radiation Data Set. This data set contains hourly data from a single station 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 3.1 LBA Caxiuana Algorithms The algorithms used to produce the LBA Caxiuana native format data are not currently available. The Caxiuana site surface type is "Para Forest". This data set is also available on-line in 30 minute Automated Weather Station Data and Hourly Flux Data native format at http://www.joss.ucar.edu/ghp/ceopdm/ under the link "CEOP EOP-1 Reference Site Data Sets". This hourly data set was formed by extracting the top of the hour observations from either the 30 minute or hourly native format data. The data were provided in local time which was shifted to UTC in this final dataset. The U and V wind components were computed from wind speed and direction. The hourly precipitation was formed by summing the previous bottom of the hour and current top of the hour 30 minute values. 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/ . 3.2 Station Information The following is a complete description of the station information provided with this CEOP LBA Caxiuana data set. Table 1 details the station list parameters. LBA Caxiuana 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. [Caxiuana] Identification Type Internal ID number type. [53] Latitude Station Latitude. [-1.71972] Longitude Station Longitude. [-51.45889] Occurrence Station occurrence. [0] Lat/Lon Accuracy Number of digits accuracy in lat/lon values. [2] Name Expanded station name. [LBA:Caxiuana: Caxiuana:Para Forest Site] 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). [20010802] End Period of Coverage End date of period of coverage (YYYYMMDD). [20011101] Country Country in which station is located. [BR] State State code. [??] 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. [hourly] Elevation Station elevation. [-9999.9] 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 LBA Caxiuana 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 http://www.joss.ucar.edu/ghp/ceopdm/ under the link CEOP EOP-1 Reference Site Data Sets. Upon confirmation from the data source, the Latent Heat Flux, Soil Temperature at 5 cm, Incoming Longwave, and Outgoing Longwave were determined to be bad and were not included in this final dataset. The following notes were provided in the raw LBA Caxiuana Automated Weather Station Data (30 min) file on the local dates and times shown. Local Date/Time Note ------------------------------------------------------- 16/8/2001 12:30 New water bottle was put 16/8/2001 13:00 Twet sounds good 16/8/2001 13:30 without fan 22/8/2001 2:00 average between two values 23/8/2001 23:30 average between two values 30/8/2001 9:30 Datalogger 30/8/2001 10:00 got burned 1/9/2001 0:00 datalogger still burned 26/9/2001 12:00 New Fan installed 26/9/2001 12:30 New datalogger installed (from cptec) 26/9/2001 13:00 Test at rain gauge 26/9/2001 13:30 Tar sensor with problem 26/9/2001 14:00 now Twet represents Tdry 1/10/2001 0:00 Twet is Tdry 5/10/2001 8:30 too much time to make 5/10/2001 9:00 the next download : data lost 25/10/2001 10:00 datalogger from cptec was taken out 25/10/2001 10:30 New datalogger installed again 25/10/2001 11:00 overtime to make download 25/10/2001 11.30 "after changing the logger 25/10/2001 12:00 "got problem 26/10/2001 18:00 "Sin and Lin - no signal" 26/10/2001 18:30 Sin calculated from PAR 26/10/2001 19:00 Lin calculated from Lout The following notes were provided in the raw LBA Caxiuana Flux Data (Hourly) file on the local dates and times shown. Local Date/Time Note ------------------------------------------------------- 1/9/2001 0:00 H2O is not good 10/9/2001 11:00 only 22 minutes 11/9/2001 10:00 only 54 minutes 11/9/2001 12:00 start of data 1/10/2001 0:00 H20 1/10/2001 1:00 fluxes are 1/10/2001 2:00 not good 4/10/2001 10:00 only 5 minutes 4/10/2001 11:00 Start of data 5/10/2001 9:00 Start of data 21/10/2001 18:00 starting Bad H 24/10/2001 11:00 No H2O flux 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.