wdc-climate.de:5285862 eng; USA collection UAICON_GW_C Sina Mehrdad Leipzig Institute for Meteorology https://www.physgeo.uni-leipzig.de/institut-fuer-meteorologie/ pointOfContact Prof. Christoph Jacobi Leipzig Institute for Meteorology https://www.physgeo.uni-leipzig.de/institut-fuer-meteorologie/ pointOfContact 2026-03-09T08:28:16 ISO 19115 ISO 19115-2:2009 UA-ICON Current-Climate Simulation: Control Run (C) 2025-06-27 publication 1 UAICON_GW_C doi:10.26050/WDCC/UAICON_GW_C Sina Mehrdad Leipzig Institute for Meteorology https://www.physgeo.uni-leipzig.de/institut-fuer-meteorologie/ Email: sina.mehrdad@uni-leipzig.de principalInvestigator Sina Mehrdad Leipzig Institute for Meteorology https://www.physgeo.uni-leipzig.de/institut-fuer-meteorologie/ Email: sina.mehrdad@uni-leipzig.de author Sajedeh Marjani Leipzig Institute for Meteorology https://www.physgeo.uni-leipzig.de/institut-fuer-meteorologie/ Email: sajedeh.marjani@uni-leipzig.de author Prof. Christoph Jacobi Leipzig Institute for Meteorology https://www.physgeo.uni-leipzig.de/institut-fuer-meteorologie/ Email: jacobi@rz.uni-leipzig.de author WDCC publisher This experiment provides output from a six-member ensemble simulation using the UA-ICON (Upper Atmosphere ICON) general circulation model, version 2.6.6. The model setup uses a high-top configuration with 120 vertical levels extending to ~150 km altitude and a horizontal resolution of ICON R2B4 (~160 km), allowing detailed representation of processes in the troposphere, stratosphere, mesosphere, and lower thermosphere. The experiment uses a time step of 360 seconds and includes a comprehensive physics package (ICON numerical weather prediction, NWP, package), notably gravity wave (GW) parameterizations for both subgrid-scale orographic (SSO) and non-orographic (NO) sources. Radiative transfer is handled via the ecRad radiation scheme. The experiment includes six ensemble members to account for internal atmospheric variability. Initial conditions are based on ERA5 climatology (1979–2022). Ensemble 1 uses the mean January 1 state from ERA5 data (1979–2022), while ensembles 2–6 each exclude one year (1984, 1992, 2000, 2008, or 2016) to introduce slight variations in the initial conditions. Each ensemble simulation spans 30 years, with the first year treated as spin-up and excluded from output, resulting in a data range from 1991-01-01 to 2019-12-31 (arbitrarily numbered dates). All simulations are conducted under seasonally repeating boundary conditions to represent a stationary present-day climate. Sea surface temperature and sea ice are based on ERA5 climatology (1979–2022), greenhouse gas concentrations follow CMIP6 historical means (1979–2020), and ozone climatology is derived from MACC and GEMS datasets. The control simulation (C) was designed with no transient external forcing, serving as a reference dataset for analyzing current-climate circulation patterns and variability, especially in the middle and upper atmosphere. It also provides a foundation for sensitivity experiments targeting the role of regional orographic and non-orographic gravity wave forcing. Daily-mean atmospheric fields are stored as monthly NetCDF files over the global domain on model levels. Variables include 3D fields (temperature, winds, pressure, vertical velocity), GW drag tendencies (SSO and NO), and surface values such as 2-meter temperature and surface pressure. Sina Mehrdad Leipzig Institute for Meteorology https://www.physgeo.uni-leipzig.de/institut-fuer-meteorologie/ pointOfContact Prof. Christoph Jacobi Leipzig Institute for Meteorology https://www.physgeo.uni-leipzig.de/institut-fuer-meteorologie/ pointOfContact NetCDF UA-ICON climate dynamics current climate gravity waves middle atmosphere CC-BY-4.0: Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ eng; USA 0.0 360.0 -90.0 90.0 calendrical, arbitrary numbered years 1991-01-01 2019-12-31 info:eu-repo/grantAgreement/DFG//268020496 – TRR 172/DE//Transregional Collaborative Research Center “ArctiC Amplification: Climate Relevant Atmospheric and Surface Processes, and Feedback Mechanisms (AC)³” info:eu-repo/grantAgreement/DFG//KA 5835%2F3-1/DE//ThE causes and consequences of exceptioNally strong stRatospherIc ArCtic polar vortices and the associated ozone Holes (ENRICH) tendency_of_eastward_wind_due_to_orographic_gravity_wave_drag Eastward Acceleration Due to Orographic Gravity Wave Drag Comment: Tendency of the eastward wind by parameterized orographic gravity waves. Used for mip era 'CMIP6' in CMOR MIP table(s): Table EdayZ; Table Emon, provided in frequency(s): day; mon, and for Realm(s): atmos; land. Codelist created on 2019-02-01 from https://github.com/PCMDI/cmip6-cmor-tables (CMOR Version=3.4; table_date(s):14 December 2018) [CF-Standard Name]; unit: m s-2 air_temperature-at2m Air temperature is the bulk temperature of the air, not the surface (skin) temperature. [CF-Standard Name-vertical_coordinate]; unit: K geopotential Geopotential is the sum of the specific gravitational potential energy relative to the geoid and the specific centripetal potential energy.[CF-Standard Name]; unit: m2 s-2 eastward_wind "Eastward" indicates a vector component which is positive when directed eastward (negative westward). Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward_air_velocity.) [CF-Standard Name]; unit: m s-1 upward_air_velocity vertical wind velocity A velocity is a vector quantity. "Upward" indicates a vector component which is positive when directed upward (negative downward). Upward air velocity is the vertical component of the 3D air velocity vector. [CF-Standard Name]; unit: m s-1 tendency_of_air_temperature_due_to_dissipation_of_orographic_and_nonorographic_gravity_waves not filled; unit: K s-1 air_pressure air_pressure [CF-Standard Name]; unit: Pa air_temperature Air temperature is the bulk temperature of the air, not the surface (skin) temperature. [CF-Standard Name]; unit: K tendency_of_northward_wind_due_to_orographic_gravity_wave_drag Northward Acceleration Due to Orographic Gravity Wave Drag Comment: Tendency of the northward wind by parameterized orographic gravity waves. (Note that CF name tables only have a general northward tendency for all gravity waves, and we need it separated by type.) Used for mip era 'CMIP6' in CMOR MIP table(s): Table Emon, provided in frequency(s): mon, and for Realm(s): atmos; land. Codelist created on 2019-02-01 from https://github.com/PCMDI/cmip6-cmor-tables (CMOR Version=3.4; table_date(s):14 December 2018) [CF-Standard Name]; unit: m s-2 tendency_of_northward_wind_due_to_nonorographic_gravity_wave_drag Northward Acceleration Due to Non-Orographic Gravity Wave Drag Comment: Tendency of the northward wind by parameterized nonorographic gravity waves. (Note that CF name tables only have a general northward tendency for all gravity waves, and we need it separated by type.) Used for mip era 'CMIP6' in CMOR MIP table(s): Table EmonZ, provided in frequency(s): mon, and for Realm(s): atmos; land. Codelist created on 2019-02-01 from https://github.com/PCMDI/cmip6-cmor-tables (CMOR Version=3.4; table_date(s):14 December 2018) [CF-Standard Name]; unit: m s-2 tendency_of_eastward_wind_due_to_nonorographic_gravity_wave_drag Eastward Acceleration Due to Non-Orographic Gravity Wave Drag Comment: Tendency of the eastward wind by parameterized nonorographic gravity waves. Used for mip era 'CMIP6' in CMOR MIP table(s): Table EdayZ; Table Emon; Table EmonZ, provided in frequency(s): day; mon, and for Realm(s): atmos; land. Codelist created on 2019-02-01 from https://github.com/PCMDI/cmip6-cmor-tables (CMOR Version=3.4; table_date(s):14 December 2018) [CF-Standard Name]; unit: m s-2 height Height is the vertical distance above the surface. [CF-Standard Name]; unit: m northward_wind "Northward" indicates a vector component which is positive when directed northward (negative southward). Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward_air_velocity.) [CF-Standard Name]; unit: m s-1 surface_air_pressure The surface called "surface" means the lower boundary of the atmosphere.[CF-Standard Name]; unit: Pa NetCDF 9714835 https://www.wdc-climate.de/ui/entry?acronym=UAICON_GW_C information collection