A247-06
The GGG2020 TCCON Data Product
Wednesday, 16 December 2020: 20:50
Virtual
Joshua Laughner1, Geoffrey C Toon2, Debra Wunch3, Sébastien Roche3, Joseph Mendonca4, Matthäus Kiel2, Coleen Marie Roehl1, Paul Wennberg1, Young Suk Oh Sr5, Dietrich G Feist6,7, Isamu Morino8, Voltaire A Velazco9, David W T Griffith9, Nicholas Michael Deutscher9, Laura T Iraci10, James Robert Podolske10, Kimberly Strong3, Ralf Sussmann11, Benedikt Herkommer12, Jochen Gross12, Omaira E García13, Dave Pollard14, John Robinson14, Christof Petri15, Thorsten Warneke15, Yao V Te16, Pascal Jeseck16, Manvendra Krishna Dubey17, Martine De Maziere18, Mahesh Kumar Sha18, Markus Rettinger19, Kei Shiomi20 and Rigel Kivi21, (1)California Institute of Technology, Pasadena, CA, United States, (2)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (3)University of Toronto, Department of Physics, Toronto, ON, Canada, (4)Environment and Climate Change Canada, Gatineau, ON, Canada, (5)Global Atmosphere Watch Team, Innovative Meteorological Research Department, National Institute of Meteorological Sciences, Jeju-Do, South Korea, (6)Ludwig-Maximilians-Universität München, Lehrstuhl für Physik der Atmosphäre, Munich, Germany, (7)Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany, (8)National Institute for Environmental Studies, Tsukuba, Japan, (9)University of Wollongong, Centre for Atmospheric Chemistry, School of Earth, Atmospheric and Life Sciences, Wollongong, NSW, Australia, (10)NASA Ames Research Center, Moffett Field, CA, United States, (11)Karlsruhe Institute of Technology, IMK-IFU, Garmisch, Germany, (12)Karlsruhe Institute of Technology, Karlsruhe, Germany, (13)Meteorological State Agency of Spain, AEMET, Santa Cruz de Tenerife, Spain, (14)National Institute of Water and Atmospheric Research, Wellington, New Zealand, (15)University of Bremen, Institute of Environmental Physics, Bremen, Germany, (16)Laboratoire d'Etudes du Rayonnement et de la Matière en Astrophysique et Atmosphères (LERMA) - Sorbonne Université, Paris, France, (17)Los Alamos National Laboratory, Los Alamos, NM, United States, (18)Royal Belgian Institute for Space Aeronomy, Brussels, Belgium, (19)Karlsruhe Institute of Technology, IMK-IFU, Karlsruhe, Germany, (20)Japan Aerospace Exploration Agency, Tsukuba, Japan, (21)Finnish Meteorological Institute, Helsinki, Finland
Abstract:
The TCCON (Total Carbon Column Observing Network) uses the GGG software to retrieve column-averaged mixing ratios of several climate-relevant gases, including CO2, N2O, CH4, and CO, from ground-based solar absorption spectra. This year, we released a new data version processed with the latest version of this software (GGG2020) that has several key improvements over its predecessor, GGG2014. These improvements include changes to the spectroscopic database, prior profiles, spectral fitting, and post processing. A major goal of this update was to diagnose and reduce site-to-site biases. Here, we will give a brief overview of the changes introduced in GGG2020 and examine differences in the retrieved mixing ratios between GGG2014 and GGG2020.
