This dataset accompanies the publication below. Here we provide the results of the analysis, including gridded estimates of methane emissions for the Washington/Baltimore area at 0.01 degrees resolution and monthly from 2017 through 2021. All files available for unrestricted public use with citation of this data set *except* the Observations_XX files. Observations are for non-commercial use only, as they are purchased from a private data provider (AEM, Inc. via Earth Networks, Inc.).Methane Emissions Show Recent Decline but Strong Seasonality in Two US Northeastern CitiesAnna Karion, Subhomoy Ghosh, Israel Lopez-Coto, Kimberly Mueller, Sharon Gourdji, Joseph Pitt, and James WhetstoneEnvironmental Science & Technology 2023 57 (48), 19565-19574 DOI: 10.1021/acs.est.3c05050

Data regarding landfill methane emissions for the manuscript "Investigation of US landfill GHG reporting program methane emission models". This dataset is associated with the following publication: Stark, B., K. Tian, and M. Krause. Investigation of U.S. landfill GHG reporting program methane emission models. WASTE MANAGEMENT. Elsevier Science Ltd, New York, NY, USA, 186: 86-93, (2024).

this is the landfill gas flow, methane flow and carbon dioxide flow. This dataset is associated with the following publication: Jain, P., J. Wally, T. Townsend, M. Krause, and T. Tolaymat. Greenhouse gas reporting data improves understanding of regional climate impact on landfill methane production and collection. PLOS ONE. Public Library of Science, San Francisco, CA, USA, 16(2): e0246334, (2021).

this is the landfill gas flow, methane flow and carbon dioxide flow. This dataset is associated with the following publication: Jain, P., J. Wally, T. Townsend, M. Krause, and T. Tolaymat. Greenhouse gas reporting data improves understanding of regional climate impact on landfill methane production and collection. PLOS ONE. Public Library of Science, San Francisco, CA, USA, 16(2): e0246334, (2021).

Hourly methane mole fraction data collected from four tower sites in the Washington DC and Baltimore MD region as part of NIST's Northeast Corridor project. Dataset accompanying publication "Seasonally resolved excess urban methane emissions from the Baltimore/Washington, DC metropolitan region" by Huang, Y., Kort, E. A., Gourdji, S., Karion, A., Mueller, K., and Ware, J.: Seasonally Resolved Excess Urban Methane Emissions from the Baltimore/Washington, DC Metropolitan Region, Environ. Sci. Technol., 10.1021/acs.est.9b02782, 2019. Data is described further in the publication and readme document.

Hourly methane mole fraction data collected from four tower sites in the Washington DC and Baltimore MD region as part of NIST's Northeast Corridor project. Dataset accompanying publication "Seasonally resolved excess urban methane emissions from the Baltimore/Washington, DC metropolitan region" by Huang, Y., Kort, E. A., Gourdji, S., Karion, A., Mueller, K., and Ware, J.: Seasonally Resolved Excess Urban Methane Emissions from the Baltimore/Washington, DC Metropolitan Region, Environ. Sci. Technol., 10.1021/acs.est.9b02782, 2019. Data is described further in the publication and readme document.

Methane (CH4) mole fraction data collected from three tower sites in the Washington DC area: Bucktown, MD (BUC, ghg01), Stafford, VA (SFD, ghg65), and Thurmont, MD (TMD, ghg61), as part of NIST's Northeast Corridor Urban Testbed project, presented as 1-minute averages. This data is published for research academic and related non-commercial purposes consistent with NIST?s mandate to further the science and the promulgation of appropriate standards. This dataset was used in the following publication and this archive represents the static archive of the data used in the publication and is not updated or modified: Sahu, S., Ahn, D., Loughner, C., and Dickerson, R., "Influence of synoptic weather patterns on methane mixing ratios in the Baltimore/Washington region", Atmospheric Environment, Volume 334, 2024, 120675, ISSN 1352-2310,https://doi.org/10.1016/j.atmosenv.2024.120675.Data is described further in the Readme document and references cited within.

Methane (CH4) mole fraction data collected from three tower sites in the Washington DC area: Bucktown, MD (BUC, ghg01), Stafford, VA (SFD, ghg65), and Thurmont, MD (TMD, ghg61), as part of NIST's Northeast Corridor Urban Testbed project, presented as 1-minute averages. This data is published for research academic and related non-commercial purposes consistent with NIST’s mandate to further the science and the promulgation of appropriate standards. This dataset was used in the following publication and this archive represents the static archive of the data used in the publication and is not updated or modified: Sahu, S., Ahn, D., Loughner, C., and Dickerson, R., "Influence of synoptic weather patterns on methane mixing ratios in the Baltimore/Washington region", Atmospheric Environment, Volume 334, 2024, 120675, ISSN 1352-2310,https://doi.org/10.1016/j.atmosenv.2024.120675.Data is described further in the Readme document and references cited within.

These files contain the publicly available data from the GHG Reporting Program for 2010. This data includes non-confidential data reported by facilities that directly emit GHGs. The files also contain non-confidential information reported by suppliers of fossil fuels and industrial gases. The files include data in both HTML (human readable) and XML format. For more information on the GHG Reporting Program and this data, please visit http://epa.gov/ghgreporting