[Data formats] Six types of data formats are used. The essentially required data items described below characterize each format. Actual data files may include associated meteorological data and flags in addition to data on these items. <> Hourly: {year, month, day, hour}, [concentration, certainty, number of data, standard deviation] Daily: {year, month, day}, [concentration, certainty, number of data, standard deviation] Monthly: {year, month}, [concentration, certainty, number of data, standard deviation] Fixed Event: {year, month, day, hour, minute}, [concentration] Mobile (2D) Event: {year, month, day, hour, minute, latitude, longitude}, [concentration] Mobile (3D) Event: {year, month, day, hour, minute, latitude, longitude, altitude}, [concentration] Icecore: {estimated air age, depth}, [concentration] Time and site data are indicated within { } brackets, and observed data for an element are indicated within [ ]brackets. If more than one element is involved (for example, as in CFC-11 and CFC-12), the set of observed data for each element are indicated in [ ]brackets, with the set of data for an element followed by that for another element. Each data file uses a text format with the "space" symbol used as the delimiter and a 25-line description is placed in its initial portion. ********************************************************************* REM01 EXPLANATORY 25-LINE FOR THE HOURLY DATA REM02 REM03 STATION: Ryori REM04 CATEGORY: Regional REM05 COUNTRY/TERRITORY: Japan REM06 SUBMITTED BY: JMA REM07 LATITUDE: 39 2' N REM08 LONGITUDE: 141 50' E REM09 ALTITUDE: 230 m REM10 REM11 PARAMETER: CO2 REM12 COVERING PERIOD: January 1987 - December 1987 REM13 UNIT: ppm REM14 ANALYSIS: NDIR REM15 TIME INTERVAL: Continuous REM16 CLASSIFICATION: Provisional REM17 CALIBRATION: WMO mole fraction scale REM18 REM19 CALCULATION: Station REM20 REGISTRATION: 2001/10/23 REM21 REM22 COMMENT: REM23 REM24 M DD hh CO2 V ND SD WD WS H AT F REM25 ppm 1987 01 01 01 -9999999 -99 0 -99999 338 16.1 56 2.7 0 1987 01 01 02 -9999999 -99 0 -99999 315 12.9 50 2.3 0 ********************************************************************* The first line indicates the data format used. Lines 2 through 23 describe meta-information on observation sites and the concentration-measuring method. Line 24 describes data items. The number of digits allocated for each data item is predetermined, and item names are right aligned. A "space" symbol is inserted between data items as the delimiter. Line 25 describes the concentration unit used. The unit is the same as that described on line 13. Units of the related meteorological data are not described on this line. Refer to the item name list described below for the units. Data on and after line 26 are right aligned. <> Item name: Number of digits: "No Data": Content: Supplementary explanation Time/site data First 4 : : Observation year : If the file is ICECORE, first 7 digits are Estimated Air Age M : 2 : : Calendar month : Two digits, even for originally single digit data, are always used. (ex, "01") DD : 2 : : Calendar day : Two digits, even for originally single digit data, are always used. (ex, "01") hh : 2 : : Hour (local time): Two digits, even for originally single digit data, are always used. (ex, "01") mm : 2 : : Minute : Two digits, even for originally single digit data, are always used. (ex, "01") Lat : 6 : : Latitude of sampling location (degrees and minutes) : The DD-MMN(orS) format is used. North of equator is "N". South of equator is "S". Lon : 7 : : Longitude of sampling location (degrees and minutes) : The DDD-MM format is used. East of the Meridian of Greenwich is "E". West of the Meridian of Greenwich is "W". Alt : 5 : : Altitude, sampling height/depth (m) : Height is positive (+). Depth is negative (-). Depth : 7 : "-999999" : Sampling depth of Icecore (m): Observed data for an element Parameter : 8 : "-9999999" : Concentration: 13 digits are used only for VOCs. V : 3 : "-99" : Validation: ND : 4 : "-999" : Number of data using in calculating value: SD : 6 : "-99999" : Standard deviation: Associated meteorological data WD : 3 : "-99" : Wind direction (degree): WS : 4 : "-999" : Wind speed (s/m): WF : 3 : "-99" : Wind steadiness factor: H : 3 : "-99" : Humidity (%): AP : 6 : "-99999" : Air pressure (hPa): AT : 5 : "-9999" : Air temperature (degree of Celsius, C): DT : 5 : "-9999" : Dew point temperature (degree of Celsius, C) : ST : 5 : "-9999" : Sea water temperature (degree of Celsius, C): SST : 5 : "-9999" : Sea surface water temperature (degree of Celsius, C): SS : 7 : "-999999" : Sea water salinity (psu): SSS : 7 : "-999999" : Sea surface water salinity (psu): RR : 5 : "-9999" : Precipitaion amount (mm): Acc : 6 : "-99999" : Acuracy: F : 3 : "-99" : Flag for data quality: Remark : Variable length