Work Description

Title: Aircraft Data for Airborne Assessment of Methane Emissions from Offshore Platforms in the U.S. Gulf of Mexico Open Access Deposited

h
Attribute Value
Methodology
  • Data collected by Mooney aircraft in the U.S. Gulf of Mexico in January 2018. Measurements of methane (CH4), carbon dioxide (CO2), carbon monoxide (CO), and water vapor (H2O), are collected with the Picarro model 2301-f instrument with wavelength-scanned cavity ringdown spectrometry. Measurements were made at a frequency of 0.33 to 0.5 Hz with an uncertainty of 1.4 ppb CH4. Ozone (O3) was collected by the 2B 205 Dual Beam Ozone Monitor using two detection cells to simultaneously measure ozone scrubbed and non-scrubbed air. Samples were made at a frequency of 0.5 Hz with an average precision and accuracy of 1 ppb. GPS antennae, mounted on the Mooney aircraft, recorded latitude, longitude, altitude, aircraft heading, zonal speed, and meridional speed. Horizontal winds are calculated following Conley et al (2014) . Temperature (Co) and humidity (%) were collected with the Vaisala HMP60 probe. Aircraft speeds averaged around 70 meters per second.
Description
  • This data-set contains data used in the publication "Airborne Assessment of Methane Emissions from Offshore Platforms in the U.S. Gulf of Mexico" by Gorchov Negron et al. (2020). There are 46,032 rows and 45 columns in the data.

  • The aircraft sampled offshore facilities with two unique sampling strategies: facility-level samples and regional box samples. Gorchov Negron et al. used facility-level samples to calculate facility-level fluxes and regional box samples, in conjunction with vertical profiles, to calculate regional-level fluxes. Meteorological parameters in the data were evaluated to discern when assumptions for each method were met. The facility-level fluxes were used to generate a facility-level aerial measurement-based inventory that was scaled up for comparison with regional-level fluxes.
Creator
Depositor
  • agorchov@umich.edu
Contact information
Discipline
Funding agency
  • Other Funding Agency
Other Funding agency
  • Environmental Defense Fund

  • Climate and Clean Air Coalition (CCAC) Oil and Gas Methane Science Studies (MSS), hosted by the United Nations Environment Programme

  • European Commission

  • Oil and Gas Climate Initiative

  • Alfred P. Sloan Foundation
Keyword
Citations to related material
  • Alan M. Gorchov Negron, Eric A. Kort, Stephen A. Conley, Mackenzie L. Smith. "Airborne Assessment of Methane Emissions from Offshore Platforms in the U.S. Gulf of Mexico". Environ. Sci. Technol. 2020. http://dx.doi.org/10.1021/acs.est.0c00179
Resource type
Last modified
  • 11/18/2022
Published
  • 04/02/2020
Language
DOI
  • https://doi.org/10.7302/v559-6e13
License
To Cite this Work:
Gorchov Negron, A. M., Kort, E. A., Conley, S. A., Smith, M. L. (2020). Aircraft Data for Airborne Assessment of Methane Emissions from Offshore Platforms in the U.S. Gulf of Mexico [Data set], University of Michigan - Deep Blue Data. https://doi.org/10.7302/v559-6e13

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Files (Count: 3; Size: 359 MB)

Thumbnailthumbnail-column Title Original Upload Last Modified File Size Access Actions
OffMethaneGulf_README.txt 2020-04-02 2020-04-02 2.22 KB Open Access
allOffMethaneGulfFlights.txt 2020-03-20 2020-03-20 191 MB Open Access
allOffMethaneGulfFlights.csv 2020-03-20 2020-03-20 168 MB Open Access
This is the data as presented and described in Alan M. Gorchov Negron, Eric A. Kort, Stephen A. Conley, Mackenzie L. Smith. “Airborne Assessment of Methane Emissions from Offshore Platforms in the U.S. Gulf of Mexico”. Environ. Sci. Technol. 2020. http://dx.doi.org/10.1021/acs.est.0c00179 For questions or information, contact the PI Dr. E. A. Kort at eakort@umich.edu There are 46,032 rows and 45 columns in the data. Values of 999 represent NA values and should be excluded along with other extreme anomalous values due to instrument error. Column names: “flt” “box” “yr” “month” “day” “hr” “min” “sec” “timezone” “time” “gpstime” “lat” “lon” “gpsalt” “avialt” “picco2” “picch4” “picco” “pich2o” “wetco2” “wetch4” “picpress” “pictemp” “o3” “ozcell_t” “ozcell_p” “ozflow” “ambpress” “T” “RH” “avipress” “u_speed” “v_speed” “iaS” “tas” “oat” “rot” “vert_speed” “aviheading” “mag_var” “zspeed” “mspeed” “gpsheading” “pitch” “roll” Columns 1-11 are flight number, study site, and time data, ‘time’ column is UTC time in seconds since 12:00:00 1/1/1970 Columns 12-15 are location data for latitude (deg), longitude (deg), gps altitude (msl), avionics altitude (feet agl) Columns 16-23 are Picarro data for CO2 (ppm), CH4 (ppb), CO (ppb), H2O (%), wet molar fraction CO2 and CH4, cell pressure (Torr), and temperature (C). Note that some values need to be removed and viable CO data is limited. Columns 24-27 are Ozone data for O3 (ppb), cell temperature (C), pressure (mb), and flow (cc/min) Columns 28-30 are ambient parameters for pressure (mb), temperature (C), relative humidity (%) Columns 31-40 are Avionics data for pressure (mb), wind speed (m/s), in air speed (kts), true air speed (kts), outside temperature (K), rotation (deg), vertical speed (ft/sec), magnetic variation (deg) Columns 41-45 are GPS data for zonal speed (m/s), meridional speed (m/s), heading (deg), pitch (deg), and roll (deg); Citation for this dataset: Gorchov Negron, A., Kort, E., Conley, S., Smith, M. Aircraft Data for Airborne Assessment of Methane Emissions from Offshore Platforms in the U.S. Gulf of Mexico [Data set]. University of Michigan - Deep Blue. https://doi.org/10.7302/v559-6e13

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