edu.ucar.opensky::articles:23329 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T15:12:43.179069 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7z89g17 https://doi.org/10.22033/ESGF/input4MIPs.1117 https Related Dataset #1 Biomass Burning emissions for CMIP6 (v1.2) https://doi.org/10.22033/ESGF/input4MIPs.1241 https Related Dataset #2 Historical Emissions (1750 - 2014) - CEDS - v2017-05-18 https://doi.org/10.22033/ESGF/CMIP6.10071 https Related Dataset #3 NCAR CESM2-WACCM model output prepared for CMIP6 CMIP historical https://doi.org/10.22033/ESGF/CMIP6.10041 https Related Dataset #4 NCAR CESM2-WACCM model output prepared for CMIP6 CMIP amip https://doi.org/10.3334/CDIAC/ATG.002 https Related Dataset #5 Methane, Nonmethane Hydrocarbons, Alkyl Nitrates, and Chlorinated Carbon Compounds including 3 Chlorofluorocarbons (CFC-11, CFC-12, and CFC-113) in Whole-air Samples (April 1979 – December 2012) The chemistry mechanism in the Community Earth System Model Version 2 (CESM2) 2020-04-01T00:00:00Z publication https://n2t.org/ark:/85065/d7z89g17 https://doi.org/10.1029/2019MS001882 Emmons, Louisa K. author Schwantes, Rebecca H. author Orlando, John J. author Tyndall, Geoffrey S. author Kinnison, Douglas E. author Lamarque, Jean-François author Marsh, Daniel author Mills, Michael J. author Tilmes, Simone author Bardeen, Charles author Buchholz, Rebecca author Conley, Andrew J. author Gettelman, Andrew author García, Rolando R. author Simpson, I. author Blake, D. R. author Meinardi, S. author Pétron, G. author UCAR/NCAR - Library publisher The Community Earth System Model version 2 (CESM2) includes a detailed representation of chemistry throughout the atmosphere in the Community Atmosphere Model with chemistry and Whole Atmosphere Community Climate Model configurations. These model configurations use the Model for Ozone and Related chemical Tracers (MOZART) family of chemical mechanisms, covering the troposphere, stratosphere, mesosphere, and lower thermosphere. The new MOZART tropospheric chemistry scheme (T1) has a number of updates over the previous version (MOZART-4) in CESM, including improvements to the oxidation of isoprene and terpenes, organic nitrate speciation, and aromatic speciation and oxidation and thus improved representation of ozone and secondary organic aerosol precursors. An evaluation of the present-day simulations of CESM2 being provided for Climate Model Intercomparison Project round 6 (CMIP6) is presented. These simulations, using the anthropogenic and biomass burning emissions from the inventories specified for CMIP6, as well as online calculation of emissions of biogenic compounds, lightning NO, dust, and sea salt, indicate an underestimate of anthropogenic emissions of a variety of compounds, including carbon monoxide and hydrocarbons. The simulation of surface ozone in the southeast United States is improved over previous model versions, largely due to the improved representation of reactive nitrogen and organic nitrate compounds resulting in a lower ozone production rate than in CESM1 but still overestimates observations in summer. The simulation of tropospheric ozone agrees well with ozonesonde observations in many parts of the globe. The comparison of NOx and PAN to aircraft observations indicates the model simulates the nitrogen budget well. 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