ABoVE: Atmospheric Profiles of CO, CO2 and CH4 Concentrations from Arctic-CAP, 2017

Sweeney, C.; K. McKain

This dataset provides in situ airborne measurements of atmospheric carbon monoxide (CO), carbon dioxide (CO2), methane (CH4), and water vapor concentrations, plus air temperature, pressure, relative humidity, and wind speed values over Alaska and the Yukon and Northwest Territories of Canada during the Arctic Carbon Aircraft Profile (Arctic-CAP) monthly sampling campaigns from April-November 2017. Observations have been averaged to a 10-second interval and are reported with the number of samples (N) and standard deviation. During each of the six monthly campaigns, flights over the Arctic-Boreal Vulnerability Experiment (ABoVE) domain included 25 vertical profiles, from the surface up to 6 km altitude, at locations selected to complement regular long-term vertical profiles, remote sensing data, and ground-based flux tower measurements.

Citation

In order to use these data, you must cite this data set with the following citation:

Sweeney, C., and K. McKain. 2019. ABoVE: Atmospheric Profiles of CO, CO2 and CH4 Concentrations from Arctic-CAP, 2017. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1658

This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use Policy.

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Данни и ресурси

Допълнителна информация

Поле Стойност
Identifier DOI: 10.3334/ORNLDAAC/1658
Project(s) The Arctic-Boreal Vulnerability Experiment (ABoVE)
Institute NOAA Earth System Research Laboratory (ESRL) Global Monitoring Division
Източник https://doi.org/10.3334/ORNLDAAC/1658
Publication Date 2019-05-02
Версия 1.0
Product Atmospheric Profiles of CO, CO2 and CH4 Concentrations
Sensor Picarro G2401
Files
  1. ABoVE_2017_insitu_10sec.nc
Variables [Units]
  1. altitude: Sample altitude (GPS altitude) in meters above sea level [m a.s.l.]
  2. flight_id: A unique number identifying each flight. The format is the date in YYYYMMDD on which the flight began. See Table 1.
  3. CH4: Mole fraction of methane in dry air. Average of all measurements made in the time interval. Mole fraction reported in units of nanomole per mol (1e-9 mol per mol of dry air); equivalent to ppb (parts per billion). Fill value: -9999 [nmol per mol]
  4. CH4_nvalue: Number of individual measurements used to compute reported value. Fill value: -9
  5. CH4_stdv: Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. The mole fraction reported in units of nanomole per mol (1e-9 mol per mol of dry air). Fill value: -9999 [nmol per mol]
  6. CH4_unc: Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. The mole fraction reported in units of nanomole per mol (1e-9 mol per mol of dry air). Fill value: -9999 [nmol per mol]
  7. CO2: Mole fraction of carbon dioxide in dry air; average of all measurements made in the time interval. Mole fraction reported in units of micromole per mole (1e-6 mol per mol of dry air); equivalent to ppm (parts per million). Fill value: -9999 [nmol per mol]
  8. CO2_nvalue: Number of individual measurements used to compute reported value. Fill value: -9
  9. CO2_stdv: Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. The mole fraction reported in units of micromole per mole (1e-6 mol per mol of dry air); equivalent to ppm (parts per million). Fill value: -9999 [nmol per mol]
  10. CO2_unc: Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. The mole fraction reported in units of micromole per mole (1e-6 mol per mol of dry air); equivalent to ppm (parts per million).Fill value: -9999 [nmol per mol]
  11. CO: Mole fraction of carbon monoxide in dry air; average of all measurements made in the time interval. Mole fraction reported in units of nanomole per mol (1e-9 mol per mol of dry air); equivalent to ppb (parts per billion). [nmol per mol]
  12. CO_nvalue: Number of individual measurements used to compute reported value. Fill value: -9
  13. CO_stdv: Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. The mole fraction reported in units of nanomole per mol (1e-9 mol per mol of dry air). Fill value: -9999 [nmol per mol]
  14. CO_unc: Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. The mole fraction reported in units of nanomole per mol (1e-9 mol per mol of dry air). Fill value: -9999 [nmol per mol]
  15. H2O: Water vapor; Average of all measurements made in the time interval. Fill value: -9999 [%]
  16. H20_nvalue: Number of individual measurements used to compute reported value. Fill value: -9
  17. H20_stdv: Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. Fill value: -9999 [%]
  18. H2O_unc: Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset [%]
  19. Latitude: [°N]
  20. Longitude: [°E]
  21. T: Temperature: Air temperature from the Vaisala instrument; average of all measurements made in the time interval. Not calibrated [°K]
  22. T_nvalue: Number of individual measurements used to compute reported value. Fill value: -9
  23. T_stdv: Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1 [°K]
  24. T_unc: Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. Fill value: -9999 [°K]
  25. P: Air pressure; average of all measurements made in the time interval. Not calibrated. Measuring instrument: Picarro G2401 [Pa]
  26. P_nvalue: Number of individual measurements used to compute reported value. Fill value: -9
  27. P_stdv: Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. Fill value: -9999 [Pa]
  28. P_unc: Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. Fill value: -9999 [Pa]
  29. profile_id: A unique integer greater than 0 for each profile on each flight number; a value of 0 means that those data are not part of a profile
  30. RH: Relative humidity; average of all measurements made in the time interval. Not calibrated [%]
  31. RH_nvalue: Number of individual measurements used to compute reported value. Fill value: -9 [%]
  32. RH_stdv: Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. Fill value: -9999 [%]
  33. RH_unc: Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. Fill value: -9999 [%]
  34. time: Number of seconds since January 1, 1970 in UTC. Time-averaged values are reported at the beginning of the averaging interval
  35. time_components: Calendar time components as integers. Times and dates are UTC. Time-averaged values are reported at the beginning of the averaging interval. Provided in the order: year, month, day, hour, minute, second [YMDHMS]
  36. time_decimal: Decimal year in UTC. Time-averaged values are reported at the beginning of the averaging interval
  37. u: Eastward wind (Aspen instrument); Average of all measurements made in the time interval. Aircraft calibrated. Fill value: -9999 [m/s]
  38. u_nvalue: Number of individual measurements used to compute reported value. Fill value: -9 [m/s]
  39. u_stdv: Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. Fill value: -9999 [m/s]
  40. u_unc: Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. Fill value: -9999 [m/s]
  41. v: Northward wind (Aspen instrument); Average of all measurements made in the time interval. Aircraft calibrated. Fill value: -9999 [m/s]
  42. v_nvalue: Number of individual measurements used to compute reported value. Fill value: -9 [m/s]
  43. v_stdv: Standard deviation of all measurements made in the time interval. A value of 0 occurs when nvalue is equal to 1. Fill value: -9999 [m/s]
  44. v_unc: Estimated uncertainty of the reported value. May be a single average uncertainty value for the whole dataset. Fill value: -9999 [m/s]
Region Alaska and Yukon and Northwest Territories of Canada
Spatial Reference
Spatial Resolution Point locations. At aircraft speed of 170 knots (87.5 m/s), one 10-s averaging interval covers a distance of ~875 m. Profiles cover a vertical range from the surface up to 6 km altitude.
Spatial Coverage Latitude 40.0387 to 71.287399, Longitude -166.04539 to -104.1124
Temporal Coverage 2017-04-26 to 2017-11-05
Temporal Resolution Data were collected in approximately monthly campaigns with 7-8 flight days for each campaign. Measurement data have been averaged to 10-second intervals.
Формат netCDF
Is Supplement To
Related to

Oechel, W., and A. Kalhori. 2018. ABoVE: CO2 and CH4 Fluxes and Meteorology at Flux Tower Sites, Alaska, 2015-2017. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1562

Wofsy, S.C., et al. 2018. ATom: Merged Atmospheric Chemistry, Trace Gases, and Aerosols. ORNL DAAC, Oak Ridge, Tennessee, USA. https://doi.org/10.3334/ORNLDAAC/1581

Dataset extent