Marcellus Aircraft campaign data, May - June 2015 Version: 2017-03-29 -------------------------------------------------------------------- CONTENTS 1. Data Source and Contacts 2. Use of Data 2.1 Citation 3. Reciprocity 4. Warnings 5. Update Notes 6. Introduction 7. DATA - Fields 8. References 9. Funding -------------------------------------------------------------------- 1. DATA SOURCES AND CONTACTS Correspondence concerning these data should be directed to: Aircraft campaign PI: Dr. Colm Sweeney NOAA ESRL Global Monitoring Division 325 Broadway, GMD-1 Boulder, CO 80305 U.S.A. email: Colm.Sweeney@noaa.gov Ethane measurement PI: Dr. Eric Kort University of Michigan Space Research Building, rm. 2553 2455 Hayward Street Ann Arbor, MI 48109 U.S.A. email: eakort@umich.edu Project PI: Dr. Thomas Lauvaux University of Pennsylvania 415 Walker Building Uiversity Park, PA 16802 U.S.A. tul5@psu.edu # -------------------------------------------------------------------- 2. USE OF DATA 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. The data providers rely on the ethics and integrity of the user toassure that providers receive fair credit for their work. If the data are obtained for potential use in a publication or presentation, the contacts listed above should be informed at the outset of the nature of this work. If the data are essential to the work, or if an important result or conclusion depends on the data, co-authorship may be appropriate. This should be discussed at an early stage in the work. Manuscripts using the data should be sent to the data providers for review before they are submitted for publication so we can insure that the quality and limitations of the data are accurately represented. 2.1 CITATION Please reference these data as Sweeney, C., A. Karion, E.A. Kort, M.L. Smith, T. Newberger, S. Schwietzke, S. Wolter, T. Lauvaux (2015), Airccraft Campaign Data over the Northeastern Marcellus Shale, May-June 2015, Version: 2017-03-29, Path: https://doi.org/10.15138/G35K54. -------------------------------------------------------------------- 3. 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 these 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. -------------------------------------------------------------------- 4. WARNINGS 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. -------------------------------------------------------------------- 5. UPDATE NOTES -------------------------------------------------------------------- 6. INTRODUCTION These data were collected aboard a NOAA Twin Otter aircraft based in Williamsport, Pennsylvania in May and June of 2015. Research flights covered the Marcellus Shale region in northeastern Pennsylvania. This dataset is comprised of continuous measurements of CH4, CO2, CH4, H2O mole fractions from a Picarro cavity ring-down spectromer operated by the NOAA ESRL group, and C2H6 mole fractions from an Aerodyne laser absorption spectromoter operated by the University of Michigan group. Other paramters reported in this dataset are GPS location, course over ground, ground elevation, wind speed and direction, and ambient temperature, pressure and relative humidity. All measurements are given to the nearest 1-second. # ------------------------------------------------------------------- 7. DATA Fields are defined as follows: Field 1: [Datetime] The sample collection date and time in UTC Field 2: [Lat] The GPS latitude where the sample was collected Field 3: [Lon] The GPS longitude where the sample was collected; negative numbers indicate samples collected in the western hemisphere Field 4: [Alt] The GPS altitude where the sample was collected in units of meters above sea level Field 5: [Elev] Ground elevation from a digital elevation model in units of meters above sea level Field 6: [COG] Course over ground of the aircraft in units of degrees Field 7: [T] Air temperature in units of degrees Celsius Field 8: [P] Air pressure in units of hectopascals Field 9: [RH] Relative humidity in units of percent Field 10: [Uwind] Zonal wind speed in units of meters per second Field 11: [Vwind] Meridional wind speed in units of meters per second Field 12: [CO2] carbon-dioxide dry air mole fraction, in units of parts per million (ppm) Field 13: [CH4] methane dry air mole fraction, in units of parts per billion (ppb) Field 14: [CO] carbon-monoxide dry air mole fraction, in units of parts per billion (ppb) Field 15: [H2O] water vapor mole fraction, in units of percent Field 16: [C2H6] ethane dry air mole fraction, in units of parts per billion (ppb) Fields in each line are comma delimited. Missing values are denoted by nan. ------------------------------------------------------------------- 8. REFERENCES Barkley Z.R., T. Lauvuax, K.J. Davis, D. Aijun, Y. Cao, C. Sweeney, D. Martins, N.L. Miles, S.J. Richardson, T. Murphy, G. Cervone, A. Karion, S. Schwietzke, M.L. Smith, E.A. Kort, J.D. Maasakkers, Quantifying methane emissions from natural gas prodution in northeastern Pennsylvania, Atmos. Chem. Phys. Discuss., 2017, doi::10.5194/acp-2017-200. Karion A., C. Sweeney, S. Wolter, T. Newberger, H. Chen, A. Andrews, J. Kofler, D. Neff, P. Tans, Long-term greenhouse gas measurements from aircraft, Atmos. Meas. Tech., 6, 511-526, 2013, doi:10.5194/amt-6-511-2013. Peischl J., A. Karion, C. Sweeney, E.A. Kort, M.L. Smith, A.R. Brandt, T. Yeskoo, K.C. Aikin, S. A. Conley, A. Gvakharia, M. Trainer, S. Wolter, T.B. Ryerson, Quantifying atmospheric methane emissions from oil and natural gas production in the Bakken shale region of North Dakota, J. Geophys. Res. Atmos., 121, 6101-6111, 2016, doi:10.1002/2015JD024631. Smith M.L, E.A. Kort, A. Karion, C. Sweeney, S.C. Herndon, T.I. Yacovitch, Airborne ethane observations in the Barnett Shale: Quantification of ethaneflux and attribution of methane emissions, Environ. Sci. Technol., 49, 8158-8166, 2015, doi:10.1021/acs.est.5b00219. More information about the overall project goals and findings can be found at: http://sites.psu.edu/marcellus/ www.netl.doe.gov/research/oil-and-gas/project-summaries/natural-gas-resources/fe0013590-PSU ------------------------------------------------------------------- 9. FUNDING Funding for this project was provided by: Department of Energy (DOE) National Energy Technology Laboratory (NETL), award number DE-FE0013590. -------------------------------------------------------------------