gov.noaa.ncdc:C00363 National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce Unknown tabular digital data http://www.ncdc.noaa.gov http://www4.ncdc.noaa.gov/ol/documentlibrary/datasets.html#TD3273 http DSI-3273 Documentation NCDC Dataset Documentation for DSI-3273 information CMDL Hourly Average Surface Carbon Dioxide is historical data set DSI-3273, archived at the National Climatic Data Center (NCDC). Data were provided by the Climate Monitoring and Diagnostics Laboratory (CMDL), which is currently a part of the Office of Oceanic and Atmospheric Research (OAR) of the US National Oceanic and Atmospheric Administration (NOAA). The four observatories that provided data were maintained and operated by CMDL in locations where pollution and anthropogenic influences are frequently non-existent. The stations and periods of record were: Point Barrow, Alaska, USA Jul 1973-Dec 1992 Mauna Loa Observatory, Hawaii, USA May 1974-Dec 1992 Cape Matutula, American Samoa Jan 1976-Dec 1992 Amundsen-Scott (South Pole), Antarctica Mar 1975-Dec 1992 Station identifier, hourly average mixing ratio in parts per million (ppm), and date and time of observation were the major parameters of this data set. This historical data set is archived at NCDC in an element type format that is typical of the NCDC DS-32xx family of data sets. CMDL uses a distinctly different format for its own archival of this data. This data set is supplemented by DSI-3274, Meteorological Data from Four NOAA/OAR/CMDL Observatories. To make a wide range of climatic data available to researchers and the public. data set C00363 FLASKS CMDL > NOAA Climate Monitoring Diagnostics Laboratory Stations CMDL > Climate Monitoring and Diagnostics Laboratory (NOAA) National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce http://www4.ncdc.noaa.gov/ol/documentlibrary/datasets.html#TD3273 19730701 19921231 Ground Condition Complete As Needed -180.0 -150.0 75.0 -90.0 ISO 19115 Topic Category climatologyMeteorologyAtmosphere 004 environment 007 DIF Discipline Keyword Thesaurus Earth Sciences > Atmosphere > Meteorology Earth Sciences > Atmosphere > Climatology Earth Sciences > Atmosphere > Weather GCMD Sciences Keyword Valids EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > TRACE GASES EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY/CARBON AND HYDROCARBON COMPOUNDS > CARBON DIOXIDE GCMD Location Valids POLAR MID-LATITUDE EQUATORIAL NORTH AMERICA UNITED STATES OF AMERICA HAWAIIAN ISLANDS AMERICAN SAMOA ANTARCTICA GCMD Location Valids LAND SURFACE TROPOSPHERE CMDL > Climate Monitoring and Diagnostics Laboratory (NOAA) NOAA Climate Monitoring Diagnostics Laboratory Stations CMDL FLASKS 1 None None Not provided Unknown Completeness information not available. Not derived from another source. Unknown Positions 1-3: RECORD-TYPE - The type of data stored in this record. Value is "HLY". Each record contains one day of hourly values. Positions 4-11: STATION-ID - Contains the WBAN Station Number. (Assigned by NCDC.) Range of values: 21511 (MLO), 27514 (BRW), 61707 (SMO), 90002 (SPO). Eight digit station numbers are always right justified, zero filled. Positions 12-15: ELEMENT-TYPE - The type of data element stored in this record. CO2H - (Carbon Dioxide Hourly Averages) Positions 16-17: ELEMENT-UNITS - The units and decimal position of the data value for this record. The element units used for this data record is PM - Parts per million in hundredths. Positions 18-21: YEAR - This is the year of the record. Range of Value is 1973 - current year processed. Positions 22-23: MONTH - This is the month of the record. Range of value is 01-12. Position 24: SOURCE-CODE-1 - Contains a code that indicates the instrument type used in taking the data. (blank) - Source code not used at this time. Position 25: SOURCE-CODE-2 - Contains a code that indicates the back-up instrument type used in taking the data. (blank) - Source code not used at this time. Positions 26-27: DAY - Contains the day of the record. Range of value is 01-31. Positions 28-30: NUM-VALUES - This notates the actual number of values reported. Range of values is 001-024. NOTE: All positions after 30 are the data section. The number of data values in the data section is NUM-VALUES. Each data value is a block consisting of 12 characters. Positions 31-42, which comprise the first 12-character data value block, are described below. The same description applies to all blocks. Positions 31-34: TIME-OF-VALUE - Range 0100-2400 contains the hour of the hourly element value. Times are expressed in Greenwich Mean Time (GMT). Position 35: SIGN-OF-METEOROLOGICAL-VALUE - This is the 'SIGN' of the meteorological data value (Tape Field 013). A blank represents a positive value or a minus sign represents a negative value. The sign is always blank. Positions 36-40: DATA-VALUE - Actual data value. This field is a five digit integer. Units and decimal position are indicated in the ELEMENT-UNITS field. Missing values which contain a flag other than blank (see Flag-1 and Flag-2 fields) are assigned 99999. Missing Values which contain blank flag fields (ie., no observation made) are not included in the variable length record structure. Position 41: FLAG-1 - The data Flag (part 1). See Table A for an explanation. Position 42: FLAG-2 - The data Flag (part 2). See Table A for an explanation. TABLE A: EXPLANATION OF CARBON DIOXIDE FLAGS 1 AND 2 These are flag used to distinguish between background concentrations and concentrations contaminated due to local sources and sinks of CO2, as well as to indicate other peculiarities about the value. Flag-1 and Flag-2 are treated as one flag field consisting of two characters. NUMBER OF OCCURRENCES (BY STATION): (data through 1990) FLAG DESCRIPTION BRW MLO SMO SPO (blank) no flag assigned 98713 69666 71508 115462 C Weekly Calibration (not data) 5603 5449 4766 4319 I Instrmt Malfunction (no data) 8329 5519 7448 6090 V Large hourly Co2 Variability 11897 18636 12292 337 D Hour to Hour Diff. greater than 0.25 ppm 8501 16027 4714 480 A Based upon spline curve 11258 8604 609 11 N 0 0 0 11 U 500 38 254 71 T 821 43 1840 33 LC 81 70 4 524 NC No analog strip chart 3008 1169 943 1267 DN Rejected, diurnal 0 16972 0 0 R 25 246 16 0 E 0 689 0 0 WD 0 0 13855 0 WS 0 660 3478 0 PF 403 998 828 269 TF 50 16 653 0 SI 417 299 265 61 GA 9 0 53 0 RV 0 19 39 0 WA 0 0 0 0 VA 0 0 875 0 VV 0 70 553 0 PO 36 198 90 40 AC 3 0 6124 22 AL 2256 12 3 2423 VW 844 0 261 0 VO 0 138 0 0 MA 0 29 1 71 SW 0 116 0 0 LD 4 166 11 1 H 0 65 0 0 HV 0 60 0 0 SV 0 45 0 0 ST 12 0 0 0 F 13 1 0 1 S 1 3 0 0 Y 0 1 0 0 L 0 1 0 0 W 0 0 2 0 ES 0 1 0 0 SC 0 0 3 0 TOTAL: 152870 146136 131496 131496 None National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce Customer Services Branch Mailing and physical

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