# header_lines : 157 # # ------------------------------------------------------------->>>> # DATA SET NAME # # dataset_name: h2_stm_surface-flask_1_ccgg_event # # ------------------------------------------------------------->>>> # DESCRIPTION # # dataset_description: Atmospheric Hydrogen Dry Air Mole Fractions from the NOAA GML Carbon Cycle Cooperative Global Air Sampling Network, 2009-2021 # # ------------------------------------------------------------->>>> # CITATION # # dataset_citation: Petron, G., Crotwell, A., Crotwell, M., Kitzis, D., Madronich, M., Mefford, T., Moglia, E., Mund, J., Neff, D., Thoning, K., & Wolter, S. (2023). Atmospheric Hydrogen Dry Air Mole Fractions from the NOAA GML Carbon Cycle Cooperative Global Air Sampling Network, 2009-2021 [Data set]. NOAA GML CCGG Division. Version: 2023-07-05, https://doi.org/10.15138/WP0W-EZ08 # # ------------------------------------------------------------->>>> # FAIR USE POLICY # # dataset_fair_use: These data are made freely available to the public and the scientific community in the belief that their wide dissemination will lead to greater understanding and new scientific insights. The availability of these data does not constitute publication of the data. NOAA relies on the ethics and integrity of the user to ensure that GML receives fair credit for their work. If the data are obtained for potential use in a publication or presentation, GML should be informed at the outset of the nature of this work. If the GML data are essential to the work, or if an important result or conclusion depends on the GML data, co-authorship may be appropriate. This should be discussed at an early stage in the work. Manuscripts using the GML data should be sent to GML for review before they are submitted for publication so we can ensure that the quality and limitations of the data are accurately represented. # # ------------------------------------------------------------->>>> # WARNING # # dataset_warning: Every effort is made to produce the most accurate and precise measurements possible. However, we reserve the right to make corrections to the data based on recalibration of standard gases or for other reasons deemed scientifically justified. We are not responsible for results and conclusions based on use of these data without regard to this warning. # # ------------------------------------------------------------->>>> # GLOBAL ATTRIBUTES # # site_code : STM # site_name : Ocean Station M # site_country : Norway # site_country_flag : https://gml.noaa.gov/webdata/ccgg/ObsPack/images/flags/NORW0001.GIF # site_latitude : 66.0 # site_longitude : 2.0 # site_elevation : 0.0 # site_elevation_unit : masl # site_position_comment : This is the nominal location of the site. The sampling location at many sites has changed over time, and we report here the most recent nominal location. The actual sampling location for each observation is not necessarily the site location. The sampling locations for each observation are reported in the latitude, longitude, and altitude variables. # site_utc2lst : 0.0 # site_utc2lst_comment : Add 'site_utc2lst' hours to convert a time stamp in UTC (Coordinated Universal Time) to LST (Local Standard Time). # dataset_creation_date : 2023-07-05T13:00:15.051725 # dataset_num : 56 # dataset_name : h2_stm_surface-flask_1_ccgg_event # dataset_parameter : h2 # dataset_parameter_name : Molecular Hydrogen # dataset_parameter_industrial_name : Molecular Hydrogen # dataset_project : surface-flask # dataset_platform : fixed # dataset_selection : event # dataset_selection_tag : event # dataset_comment : For more information about these data, please see https://gml.noaa.gov/aftp/data/trace_gases/h2/flask/README_h2_surface-flask_ccgg.html # dataset_calibration_scale : H2_X2009 # dataset_start_date : 2009-10-09T14:10:00Z # dataset_stop_date : 2009-11-27T13:05:00Z # dataset_reciprocity : Use of these data implies an agreement to reciprocate. Laboratories making similar measurements agree to make their own data available to the general public and to the scientific community in an equally complete and easily accessible form. Modelers are encouraged to make available to the community, upon request, their own tools used in the interpretation of the GML data, namely well documented model code, transport fields, and additional information necessary for other scientists to repeat the work and to run modified versions. Model availability includes collaborative support for new users of the models. # dataset_usage_description : Please cite the product's citation when using data from this dataset. Relevant literature references for this dataset are listed below for convenience. # dataset_reference_total_listed : 2 # dataset_reference_1_name : Novelli, P.C., K.A. Masarie, and P.M. Lang, Molecular hydrogen in the troposhere: Global distributions and budget, J. Geophys Res., 104, 30,427-30,444, 1999. # dataset_reference_2_name : Novelli, P.C., Crotwell, A.M., and Hall, B.D, Application of Gas Chromatography with a Pulsed Discharge Helium Ionization Detector for Measurements of Molecular Hydrogen in the Atmosphere, Environ. Sci. Technol. 2009, 43, 2431-2436. # dataset_contribution : These data are provided by NOAA. Principal investigators include Gabrielle Petron (NOAA). Key partners include Norwegian Meteorological Institute (MET Norway). # lab_total_listed : 1 # lab_1_number : 1 # lab_1_abbr : NOAA # lab_1_name : NOAA Global Monitoring Laboratory # lab_1_address1 : 325 Broadway # lab_1_address2 : NOAA R/GML-1 # lab_1_address3 : Boulder, CO 80305-3328 # lab_1_country : United States # lab_1_url : https://gml.noaa.gov/ccgg/ # lab_1_parameter : Lab has contributed measurements for: h2 # lab_1_country_flag : https://gml.noaa.gov/webdata/ccgg/ObsPack/images/flags/UNST0001.GIF # lab_1_logo : https://gml.noaa.gov/webdata/ccgg/ObsPack/images/logos/noaa_medium.png # lab_1_ongoing_atmospheric_air_comparison : T # provider_total_listed : 1 # provider_1_name : Gabrielle Petron # provider_1_address1 : NOAA GML # provider_1_address2 : 325 Broadway R/GML-1 # provider_1_address3 : Boulder, CO 80305-3328 # provider_1_country : United States # provider_1_affiliation : National Oceanic and Atmospheric Administration # provider_1_email : Gabrielle.Petron@noaa.gov # provider_1_tel : (720) 295-0145 # provider_1_parameter : Provider has contributed measurements for: h2 # partner_total_listed : 1 # partner_1_name : Norwegian Meteorological Institute # partner_1_abbr : MET Norway # partner_1_country : Norway # partner_1_url : http://met.no # partner_1_parameter : Lab has contributed measurements for: h2 # partner_1_country_flag : https://gml.noaa.gov/webdata/ccgg/ObsPack/images/flags/NORW0001.GIF # ------------------------------------------------------------->>>> # VARIABLE ATTRIBUTES # # site_code:long_name : site_name_abbreviation. # site_code:comment : Site code is an abbreviation for the sampling site name. # time_components:_FillValue : -9 # time_components:long_name : integer_components_of_UTC_date/time # time_components:order : year, month, day, hour, minute, second # time_components:comment : Calendar time components as integers. Times and dates are UTC. Time-averaged values are reported at the start of the averaging interval. # datetime:long_name : air_sample_date_and_time_in_UTC # datetime:comment : Air sample date and time in UTC ISO 8601 format. Time-averaged values are reported at the start of the averaging interval. # time_decimal:_FillValue : -999.999 # time_decimal:long_name : sample_decimal_year_in_UTC # time_decimal:comment : decimal year in UTC. Time-averaged values are reported at the start of the averaging interval. # air_sample_container_id:long_name : Air_Sample_Container_ID # air_sample_container_id:comment : ID of air sample container. See provider_comment if available. # value:_FillValue : -999.999 # value:long_name : measured_mole_fraction_of_trace_gas_in_dry_air # value:units : nanomol mol-1 # value:comment : Mole fraction reported in units of nanomol mol-1 (10-9 mol per mol of dry air); abbreviated as ppb (parts per billion). # value:scale_comment : H2_X2009 # value_unc:_FillValue : -999.999 # value_unc:long_name : estimated_uncertainty_in_reported_value # value_unc:units : nanomol mol-1 # value_unc:comment : This is the estimated uncertainty of the reported value. See provider_comment if available. # latitude:_FillValue : -999.999 # latitude:standard_name : latitude # latitude:long_name : sample_latitude_in_decimal_degrees # latitude:units : degrees_north # latitude:comment : Latitude at which air sample was collected. # longitude:_FillValue : -999.999 # longitude:standard_name : longitude # longitude:long_name : sample_longitude_in_decimal_degrees # longitude:units : degrees_east # longitude:comment : Longitude at which air sample was collected using a range of -180 degrees to +180 degrees. # altitude:_FillValue : -999.999 # altitude:standard_name : altitude # altitude:long_name : sample_altitude_in_meters_above_sea_level # altitude:units : m # altitude:comment : Altitude (in meters above sea level). See provider_comment if available. # altitude:provider_comment : Altitude for this dataset is the sum of surface elevation (masl) and sample intake height (magl). # elevation:_FillValue : -999.999 # elevation:standard_name : elevation # elevation:long_name : surface_elevation_in_meters_above_sea_level # elevation:units : m # elevation:comment : Surface elevation in meters above sea level. See provider_comment if available. # intake_height:_FillValue : -999.999 # intake_height:long_name : sample_intake_height_in_meters_above_ground_level # intake_height:units : m # intake_height:comment : Sample intake height in meters above ground level (magl). See provider_comment if available. # method:long_name : air_sample_collection_method # method:comment : Air sample collection method. See provider_comment if available. # method:provider_comment : A single-character code is used to identify the sample collection method. The codes are: P - Sample collected using a portable, battery powered pumping unit. Two flasks are connected in series, flushed with air, and then pressurized to 1.2 - 1.5 times ambient pressure. D - Similar to P but the air passes through a condenser cooled to about 5 deg C to partially dry the sample. G - Similar to D but with a gold-plated condenser. T - Evacuated flask filled by opening an O-ring sealed stopcock. S - Flasks filled at NOAA GML observatories by sampling air from the in situ CO2 measurement air intake system. N - Before 1981, flasks filled using a hand-held aspirator bulb. After 1981, flasks filled using a pump different from those used in method P, D, or G. F - Five liter evacuated flasks filled by opening a ground glass, greased stopcock # event_number:long_name : Unique_Air_Sample_Event_Number # event_number:comment : Identifies each discrete air sample collected at some time and location with a unique sample event number. The event number (reported as a string) can be used to relate measurements of different trace gases and isotopes from the same sample. # instrument:long_name : instrument_ID_to_detect_atmospheric_parameter # instrument:comment : Instrument ID used to detect atmospheric parameter. See provider_comment if available. # analysis_datetime:long_name : air_sample_measurement_date_and_time_in_LT # analysis_datetime:comment : Air sample measurement date and time in LT. See provider_comment if available. # qcflag:long_name : quality_control_flag # qcflag:comment : This quality control flag is provided by the contributing PIs. See provider_comment if available. # qcflag:provider_comment : This is the NOAA 3-character quality control flag. Column 1 is the REJECTION flag. An alphanumeric other than a period (.) in the FIRST column indicates a sample with obvious problems during collection or analysis. This measurement should not be interpreted. Column 2 is the SELECTION flag. An alphanumeric other than a period (.) in the SECOND column indicates a sample that is likely valid but does not meet selection criteria determined by the goals of a particular investigation. For example, it might not have been obtained during 'background' conditions. Column 3 is the INFORMATION flag. An alphanumeric other than a period (.) in the THIRD column provides additional information about the collection or analysis of the sample. A P in the 3rd column of the QC flag indicates the measurement result is preliminary and has not yet been carefully examined by the PI. The P flag is removed once the quality of the measurement has been determined. # # VARIABLE ORDER # site_code year month day hour minute second datetime time_decimal air_sample_container_id value value_unc latitude longitude altitude elevation intake_height method event_number instrument analysis_datetime qcflag STM 2009 10 9 14 10 0 2009-10-09T14:10:00Z 2009.7714802130897 1129-99 478.0 1.985 66.0 2.0 5.0 0.0 5.0 G 286670 H8 2009-11-17T10:05:00 ... STM 2009 10 9 14 10 0 2009-10-09T14:10:00Z 2009.7714802130897 4404-99 477.86 1.985 66.0 2.0 5.0 0.0 5.0 G 286671 H8 2009-11-17T10:20:00 ... STM 2009 10 13 14 37 0 2009-10-13T14:37:00Z 2009.7824904870624 1458-99 471.45 1.985 66.0 2.0 5.0 0.0 5.0 G 286668 H8 2009-11-17T09:34:00 ... STM 2009 10 13 14 37 0 2009-10-13T14:37:00Z 2009.7824904870624 1700-99 470.62 1.985 66.0 2.0 5.0 0.0 5.0 G 286669 H8 2009-11-17T09:49:00 ... STM 2009 10 16 14 20 0 2009-10-16T14:20:00Z 2009.7906773211569 1073-99 483.61 1.985 66.0 2.0 5.0 0.0 5.0 G 286663 H8 2009-12-02T10:15:00 ... STM 2009 10 16 14 20 0 2009-10-16T14:20:00Z 2009.7906773211569 4193-99 483.27 1.985 66.0 2.0 5.0 0.0 5.0 G 286662 H8 2009-12-02T10:00:00 ... STM 2009 10 20 14 15 0 2009-10-20T14:15:00Z 2009.8016267123287 2881-99 477.72 1.985 66.0 2.0 5.0 0.0 5.0 G 286660 H8 2009-12-02T09:29:00 ... STM 2009 10 20 14 15 0 2009-10-20T14:15:00Z 2009.8016267123287 786-99 477.25 1.985 66.0 2.0 5.0 0.0 5.0 G 286661 H8 2009-12-02T09:45:00 ... STM 2009 10 22 14 35 0 2009-10-22T14:35:00Z 2009.807144216134 46-99 479.55 1.985 66.0 2.0 5.0 0.0 5.0 G 286664 H8 2009-12-02T15:08:00 ... STM 2009 10 22 14 35 0 2009-10-22T14:35:00Z 2009.807144216134 953-99 479.98 1.985 66.0 2.0 5.0 0.0 5.0 G 286665 H8 2009-12-02T15:24:00 ... STM 2009 10 25 14 30 0 2009-10-25T14:30:00Z 2009.8153538812785 3673-99 484.75 1.985 66.0 2.0 5.0 0.0 5.0 G 286666 H8 2009-12-02T15:55:00 ... STM 2009 10 25 14 30 0 2009-10-25T14:30:00Z 2009.8153538812785 609-99 484.25 1.985 66.0 2.0 5.0 0.0 5.0 G 286667 H8 2009-12-02T15:39:00 ... STM 2009 10 28 14 10 0 2009-10-28T14:10:00Z 2009.8235350076104 1042-99 484.83 1.985 66.0 2.0 5.0 0.0 5.0 G 286642 H8 2009-11-30T14:01:00 ... STM 2009 10 28 14 10 0 2009-10-28T14:10:00Z 2009.8235350076104 1460-99 485.37 1.985 66.0 2.0 5.0 0.0 5.0 G 286643 H8 2009-11-30T13:46:00 ... STM 2009 11 1 14 15 0 2009-11-01T14:15:00Z 2009.8345034246574 3715-99 493.27 1.985 66.0 2.0 5.0 0.0 5.0 G 286641 H8 2009-11-30T15:34:00 ... STM 2009 11 1 14 15 0 2009-11-01T14:15:00Z 2009.8345034246574 4006-99 494.0 1.985 66.0 2.0 5.0 0.0 5.0 G 286640 H8 2009-11-30T15:19:00 ... STM 2009 11 5 13 15 0 2009-11-05T13:15:00Z 2009.845348173516 1576-99 486.57 1.985 66.0 2.0 5.0 0.0 5.0 G 288877 H8 2010-01-21T16:11:00 ... STM 2009 11 5 13 15 0 2009-11-05T13:15:00Z 2009.845348173516 3681-99 486.05 1.985 66.0 2.0 5.0 0.0 5.0 G 288876 H8 2010-01-21T15:56:00 ... STM 2009 11 7 0 55 0 2009-11-07T00:55:00Z 2009.8494197108066 2799-99 483.92 1.985 66.0 2.0 5.0 0.0 5.0 G 288874 H8 2010-01-21T16:27:00 ... STM 2009 11 7 0 55 0 2009-11-07T00:55:00Z 2009.8494197108066 3812-99 484.26 1.985 66.0 2.0 5.0 0.0 5.0 G 288875 H8 2010-01-21T16:42:00 ... STM 2009 11 11 13 25 0 2009-11-11T13:25:00Z 2009.8618055555555 4590-99 493.86 1.985 66.0 2.0 5.0 0.0 5.0 G 288879 H8 2010-01-21T17:43:00 ... STM 2009 11 11 13 25 0 2009-11-11T13:25:00Z 2009.8618055555555 638-99 494.18 1.985 66.0 2.0 5.0 0.0 5.0 G 288878 H8 2010-01-21T17:28:00 ... STM 2009 11 14 13 15 0 2009-11-14T13:15:00Z 2009.8700057077626 1366-99 486.72 1.985 66.0 2.0 5.0 0.0 5.0 G 288881 H8 2010-01-21T17:12:00 ... STM 2009 11 14 13 15 0 2009-11-14T13:15:00Z 2009.8700057077626 951-99 486.81 1.985 66.0 2.0 5.0 0.0 5.0 G 288880 H8 2010-01-21T16:57:00 ... STM 2009 11 19 1 40 0 2009-11-19T01:40:00Z 2009.8823820395737 4220-99 491.97 1.985 66.0 2.0 5.0 0.0 5.0 G 288891 H8 2010-01-25T11:55:00 ... STM 2009 11 19 1 40 0 2009-11-19T01:40:00Z 2009.8823820395737 458-99 491.93 1.985 66.0 2.0 5.0 0.0 5.0 G 288890 H8 2010-01-25T11:39:00 ... STM 2009 11 21 1 10 0 2009-11-21T01:10:00Z 2009.887804414003 2719-99 494.38 1.985 66.0 2.0 5.0 0.0 5.0 G 288892 H8 2010-01-25T11:09:00 ... STM 2009 11 21 1 10 0 2009-11-21T01:10:00Z 2009.887804414003 3859-99 493.72 1.985 66.0 2.0 5.0 0.0 5.0 G 288893 H8 2010-01-25T11:24:00 ... STM 2009 11 24 2 45 0 2009-11-24T02:45:00Z 2009.8962043378995 4313-99 490.68 1.985 66.0 2.0 5.0 0.0 5.0 G 288888 H8 2010-01-25T16:46:00 ... STM 2009 11 24 2 45 0 2009-11-24T02:45:00Z 2009.8962043378995 4996-99 490.11 1.985 66.0 2.0 5.0 0.0 5.0 G 288889 H8 2010-01-25T17:01:00 ... STM 2009 11 27 13 5 0 2009-11-27T13:05:00Z 2009.9056031202435 1146-99 488.85 1.985 66.0 2.0 5.0 0.0 5.0 G 288887 H8 2010-01-25T16:30:00 ... STM 2009 11 27 13 5 0 2009-11-27T13:05:00Z 2009.9056031202435 2829-99 488.73 1.985 66.0 2.0 5.0 0.0 5.0 G 288886 H8 2010-01-25T16:15:00 ...