edu.ucar.opensky::articles:27208 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T18:49:36.797807 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d77p93mx https://doi.org/10.14291/TCCON.GGG2020 https Related Dataset #1 2020 TCCON Data Release https://doi.org/10.14291/TCCON.GGG2020.ATM.R0 https Related Dataset #2 Atmospheric Voigt Line List for the TCCON 2020 Data Release https://doi.org/10.14291/tccon.ggg2020.jpl02.R0 https Related Dataset #3 TCCON data from Jet Propulsion Laboratory (US), 2011, Release GGG2020.R0 https://doi.org/10.14291/tccon.ggg2020.lauder03.R0 https Related Dataset #4 TCCON data from Lauder (NZ), Release GGG2020.R0 https://doi.org/10.14291/tccon.ggg2020.nyalesund01.R0 https Related Dataset #5 TCCON data from Ny-Ålesund, Svalbard (NO), Release GGG2020.R0 https://doi.org/10.14291/tccon.ggg2020.orleans01.R0 https Related Dataset #6 TCCON data from Orléans (FR), Release GGG2020.R0 https://doi.org/10.14291/tccon.ggg2020.tsukuba02.R0 https Related Dataset #7 TCCON data from Tsukuba (JP), 125HR, Release GGG2020.R0 https://doi.org/10.14291/tccon.ggg2020.xianghe01.R0 https Related Dataset #8 TCCON data from Xianghe, China, Release GGG2020.R0 https://doi.org/10.15138/6AV0-MY81 https Related Dataset #9 NOAA AirCore atmospheric sampling system profiles https://doi.org/10.15138/9N0H-ZH07 https Related Dataset #10 Trends in globally-averaged CO2 determined from NOAA Global Monitoring Laboratory measurements. https://doi.org/10.15138/GMZ7-2Q16 https Related Dataset #11 Nitrous Oxide (N2O) hemispheric and global monthly means from the NOAA/GML halocarbons program. https://doi.org/10.15138/wkgj-f215 https Related Dataset #12 Earth System Research Laboratory Carbon Cycle and Greenhouse Gases Group Flask-Air Sample Measurements of CO2 at Global and Regional Background Sites, 1967-Present https://doi.org/10.25925/20190812 https Related Dataset #13 Multi-laboratory compilation of atmospheric carbon dioxide data for the period 1957-2018; obspack_co2_1_GLOBALVIEWplus_v5.0_2019_08_12 https://doi.org/10.25925/20200424 https Related Dataset #14 Multi-laboratory compilation of atmospheric carbon dioxide data for the period 1957-2018; obspack_ch4_1_GLOBALVIEWplus_v2.0_2020_04_24 https://doi.org/10.25925/20210801 https Related Dataset #15 Multi-laboratory compilation of atmospheric carbon dioxide data for the period 1957-2020; obspack_co2_1_GLOBALVIEWplus_v7.0_2021-08-18 https://doi.org/10.7289/V5N58JMF https Related Dataset #16 Earth System Research Laboratory Carbon Cycle and Greenhouse Gases Group Flask-Air Sample Measurements of CO2, CH4, CO, N2O, H2, and SF6 from the Aircraft Program, 1992-Present https://doi.org/10.14291/tccon.ggg2020.stable.R0 https Related Software #1 TCCON/GGG – GGG2020 The Total Carbon Column Observing Network's GGG2020 data version 2024-05-06T00:00:00Z publication https://n2t.org/ark:/85065/d77p93mx https://doi.org/10.5194/essd-16-2197-2024 Laughner, J. L. author Toon, G. C. author Mendonca, J. author Petri, C. author Roche, S. author Wunch, D. author Blavier, J. author Griffith, D. W. T. author Heikkinen, P. author Keeling, R. F. author Kiel, M. author Kivi, R. author Roehl, C. M. author Stephens, Britton author Baier, B. C. author Chen, H. author Choi, Y. author Deutscher, N. M. author DiGangi, J. P. author Gross, J. author Herkommer, B. author Jeseck, P. author Laemmel, T. author Lan, X. author McGee, E. author McKain, K. author Miller, J. author Morino, I. author Notholt, J. author Ohyama, H. author Pollard, D. F. author Rettinger, M. author Riris, H. author Rousogenous, C. author Sha, M. K. author Shiomi, K. author Strong, K. author Sussmann, R. author Té, Y. author Velazco, V. A. author Wofsy, S. C. author Zhou, M. author Wennberg, P. O. author UCAR/NCAR - Library publisher The Total Carbon Column Observing Network (TCCON) measures column-average mole fractions of several greenhouse gases (GHGs), beginning in 2004, from over 30 current or past measurement sites around the world using solar absorption spectroscopy in the near-infrared (near-IR) region. TCCON GHG data have been used extensively for multiple purposes, including in studies of the carbon cycle and anthropogenic emissions, as well as to validate and improve observations from space-based sensors. Here, we describe an update to the retrieval algorithm used to process the TCCON near-IR solar spectra and to generate the associated data products. This version, called GGG2020, was initially released in April 2022. It includes updates and improvements to all steps of the retrieval, including but not limited to the conversion of the original interferograms into spectra, the spectroscopic information used in the column retrieval, post hoc air mass dependence correction, and scaling to align with the calibration scales of in situ GHG measurements. All TCCON data are available through https://tccondata.org/ (last access: 22 April 2024) and are hosted on CaltechDATA (https://data.caltech.edu/, last access: 22 April 2024). Each TCCON site has a unique DOI for its data record. An archive of all the sites' data is also available with the DOI 10.14291/TCCON.GGG2020 . The hosted files are updated approximately monthly, and TCCON sites are required to deliver data to the archive no later than 1 year after acquisition. Full details of data locations are provided in the "Code and data availability" section. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation