wdc-climate.de:3880928 eng; USA collection Narval2 Cathy Hohenegger Max Planck Institute for Meteorology http://www.mpimet.mpg.de/ pointOfContact Teacher-Researcher Nicolas Rochetin Institut Pierre-Simon Laplace / Ecole Normale Supérieure https://www.lmd.jussieu.fr/ pointOfContact 2020-09-24T15:58:05 ISO 19115 ISO 19115-2:2009 ICON NARVAL simulation over the tropical Atlantic for the AFR subdomain, the simulation day is 2016-08-01, extracted from NARVAL2 simulations 2021-01-14 publication 1 Narval2 doi:10.26050/WDCC/Narval2 Cathy Hohenegger Max Planck Institute for Meteorology http://www.mpimet.mpg.de/ Email: cathy.hohenegger@mpimet.mpg.de principalInvestigator Teacher-Researcher Nicolas Rochetin Max Planck Institute for Meteorology http://www.mpimet.mpg.de/ Email: nicolas.rochetin@lmd.ipsl.fr author WDC Climate at DKRZ publisher ICON 2.5 km simulations over the tropical Atlantic ([65W:15E],[10S:20N] for the months of December 2013 (NARVAL1 : 30 days) and August 2016 (NARVAL2 : 30 days). The grid spacing, computed as the square root of the triangular grid cells, amounts to 2.5 km. In the vertical, a stretched vertical coordinate is used with 75 layers, whereby 12 layers are located in the first kilometer. The simulations are conducted for the months of December 2013 and July 2016. They are started every day at 00 UTC from the analysis of the European Centre for Medium-Range Weather Forecasts (ECMWF) and integrated for 36 hours. Boundary data are taken from the ECMWF forecasts and updated every 3 hours. At the bottom boundary, the Sea Surface Temperature (SST) is taken from the ECMWF analysis. It is kept fixed at its initial value during the 36-h integration period. The simulations were conducted using the ICOsahedral Non-hydrostatic (ICON) model (Zängl et al., 2015). Given the horizontal grid spacing, no convective parameterization is employed and convection is explicitly resolved by the bulk microphysics scheme that predicts cloud water, rain, snow, ice and graupel (Baldauf et al., 2011). The parameterizations for gravity wave drag and subgrid-scale orography are also switched off, otherwise the model employs the same parameterizations as the operational model version in use at the German Weather Service (DWD), see Zängl et al. (2015) and Klocke et al. (2017) for further details. Teacher-Researcher Nicolas Rochetin Institut Pierre-Simon Laplace / Ecole Normale Supérieure https://www.lmd.jussieu.fr/ pointOfContact NetCDF CC-BY-4.0: Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ eng; USA -15.0 10.0 10.0 15.0 calendrical 2016-08-01 2016-08-01 cloud_ice_mixing_ratio Mixing ratio of a parcel of ice in air is the ratio of the mass of ice to the mass of dry air. [CF-Standard Name]; unit: kg kg-1 integral_of_surface_net_downward_shortwave_flux_wrt_time integral_of_Y_wrt_X" means int Y dX. The data variable should have an axis for X specifying the limits of the integral as bounds. "wrt" means with respect to. The surface called "surface" means the lower boundary of the atmosphere. "Downward" indicates a vector component which is positive when directed downward (negative upward). Net downward radiation is the difference between radiation from above (downwelling) and radiation from below (upwelling). "Shortwave" means shortwave radiation. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics.[CF-Standard Name]; unit: not filled 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 integral_of_surface_downward_latent_heat_flux_wrt_time "integral_of_Y_wrt_X" means int Y dX. The data variable should have an axis for X specifying the limits of the integral as bounds. "wrt" means with respect to. The surface called "surface" means the lower boundary of the atmosphere. "Downward" indicates a vector component which is positive when directed downward (negative upward). The surface latent heat flux is the exchange of heat between the surface and the air on account of evaporation (including sublimation). In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. [CF-Standard Name]; unit: not filled atmosphere_mass_content_of_cloud_ice Content" indicates a quantity per unit area. The "atmosphere content" of a quantity refers to the vertical integral from the surface to the top of the atmosphere. For the content between specified levels in the atmosphere, standard names including content_of_atmosphere_layer are used. [CF-Standard Name]; unit: kg m-2 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 integral_of_surface_net_downward_longwave_flux_wrt_time "integral_of_Y_wrt_X" means int Y dX. The data variable should have an axis for X specifying the limits of the integral as bounds. "wrt" means with respect to. The surface called "surface" means the lower boundary of the atmosphere. "Downward" indicates a vector component which is positive when directed downward (negative upward). Net downward radiation is the difference between radiation from above (downwelling) and radiation from below (upwelling). "Longwave" means longwave radiation. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. [CF-Standard Name]; unit: not filled 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 precipitation_amount "Amount" means mass per unit area. "Precipitation" in the earths atmosphere means precipitation of water in all phases. [CF-Standard Name]; unit: kg m-2 eastward_wind-at10m "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-vertical_coordinate]; unit: m s-1 specific_humidity "specific" means per unit mass. Specific humidity is the mass fraction of water vapor in (moist) air.[CF-Standard Name]; unit: kg kg-1 integral_of_surface_downward_sensible_heat_flux_wrt_time "integral_of_Y_wrt_X" means int Y dX. The data variable should have an axis for X specifying the limits of the integral as bounds. "wrt" means with respect to. The surface called "surface" means the lower boundary of the atmosphere. "Downward" indicates a vector component which is positive when directed downward (negative upward). The surface sensible heat flux, also called "turbulent" heat flux, is the exchange of heat between the surface and the air by motion of air. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. [CF-Standard Name]; unit: not filled air_pressure_at_mean_sea_level Air pressure at sea level is the quantity often abbreviated as MSLP or PMSL. Air pressure is the force per unit area which would be exerted when the moving gas molecules of which the air is composed strike a theoretical surface of any orientation. "Mean sea level" means the time mean of sea surface elevation at a given location over an arbitrary period sufficient to eliminate the tidal signals. [CF-Standard Name]; unit: Pa relative_humidity relative_humidity [CF-Standard Name]; unit: % relative_humidity-at2m relative_humidity-at2m [CF-Standard Name-vertical_coordinate]; unit: % northward_wind-at10m "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-vertical_coordinate]; unit: m s-1 mass_fraction_of_liquid_precipitation_in_air "Mass fraction" is used in the construction "mass_fraction_of_X_in_Y", where X is a material constituent of Y. It means the ratio of the mass of X to the mass of Y (including X). A chemical species or biological group denoted by X may be described by a single term such as "nitrogen" or a phrase such as "nox_expressed_as_nitrogen". "Liquid_precipitation" includes both "rain" and "drizzle". "Rain" means drops of water falling through the atmosphere that have a diameter greater than 0.5 mm. "Drizzle" means drops of water falling through the atmosphere that have a diameter typically in the range 0.2-0.5 mm. [CF-Standard Name]; unit: kg kg-1 altitude (geometric height on half levels) height (geometric height on half levels) [CF-Standard Name (cell_method)]; unit: m atmosphere_convective_available_potential_energy_wrt_surface Convective(ly) available potential energy (often abbreviated CAPE) is a stability measure calculated by integrating the positive temperature difference between the surrounding atmosphere and a parcel of air lifted adiabatically from the surface to its equilibrium level. CAPE exists under conditions of potential instability, and measures the potential energy per unit mass that would be released by the unstable parcel if it were able to convect upwards to equilibrium. [CF-Standard Name]; unit: J kg-1 surface_temperature The surface called "surface" means the lower boundary of the atmosphere. The surface temperature is the (skin) temperature at the interface, not the bulk temperature of the medium above or below. [CF-Standard Name]; unit: K integral_of_toa_net_downward_shortwave_flux_wrt_time "integral_of_Y_wrt_X" means int Y dX. The data variable should have an axis for X specifying the limits of the integral as bounds. "wrt" means with respect to. "toa" means top of atmosphere. "Downward" indicates a vector component which is positive when directed downward (negative upward). Net downward radiation is the difference between radiation from above (downwelling) and radiation from below (upwelling). "Shortwave" means shortwave radiation. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. [CF-Standard Name]; unit: not filled atmosphere_mass_content_of_water_vapor atmosphere_mass_content_of_water_vapor [CF-Standard Name]; unit: kg m-2 dew_point_temperature-at2m Dew point temperature is the temperature at which a parcel of air reaches saturation upon being cooled at constant pressure and specific humidity.[CF-Standard Name-vertical_coordinate]; unit: K atmosphere_mass_content_of_cloud_liquid_water "Content" indicates a quantity per unit area. The "atmosphere content" of a quantity refers to the vertical integral from the surface to the top of the atmosphere. For the content between specified levels in the atmosphere, standard names including content_of_atmosphere_layer are used. [CF-Standard Name]; unit: kg m-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 atmosphere_convective_inhibition_wrt_surface Convective inhibition is the amount of energy per unit mass required to overcome the negatively buoyant energy exerted by the environment on a parcel of air. Convective inhibition is often abbreviated as "CIN" or "CINH". It is calculated by integrating the negative temperature difference between the surrounding atmosphere and a parcel of air lifted adiabatically from the surface to its equilibrium level. [CF-Standard Name]; unit: J kg-1 cloud_area_fraction "X_area_fraction" means the fraction of horizontal area occupied by X. "X_area" means the horizontal area occupied by X within the grid cell. Cloud area fraction is also called "cloud amount" and "cloud cover". The cloud area fraction is for the whole atmosphere column, as seen from the surface or the top of the atmosphere. The cloud area fraction in a layer of the atmosphere has the standard name cloud_area_fraction_in_atmosphere_layer. [CF-Standard Name]; unit: % integral_of_toa_net_longwave_radiation_wrt_time TOA net thermal radiation acc.; unit: not filled atmosphere_mass_content_of_graupel "Content" indicates a quantity per unit area. The "atmosphere content" of a quantity refers to the vertical integral from the surface to the top of the atmosphere. For the content between specified levels in the atmosphere, standard names including "content_of_atmosphere_layer" are used. Graupel consists of heavily rimed snow particles, often called snow pellets; often indistinguishable from very small soft hail except when the size convention that hail must have a diameter greater than 5 mm is adopted. Reference: American Meteorological Society Glossary http://glossary.ametsoc.org/wiki/Graupel. There are also separate standard names for hail. Standard names for "graupel_and_hail" should be used to describe data produced by models that do not distinguish between hail and graupel. [CF-Standard Name]; unit: kg m-2 specific_humidity-at2m "specific" means per unit mass. Specific humidity is the mass fraction of water vapor in (moist) air.[CF-Standard Name-vertical_coordinate]; unit: kg kg-1 virtual_potential_temperature Virtual potential temperature; unit: K cloud_liquid_water_mixing_ratio Mixing ratio of a parcel of liquid water in air is the ratio of the mass of liquid water to the mass of dry air. [CF-Standard Name]; unit: kg kg-1 air_density [CF-Standard Name]; unit: kg m-3 lagrangian_tendency_of_air_pressure "tendency_of_X" means derivative of X with respect to time. The Lagrangian tendency of a quantity is its rate of change following the motion of the fluid, also called the "material derivative" or "convective derivative". The Lagrangian tendency of air pressure, often called "omega", plays the role of the upward component of air velocity when air pressure is being used as the vertical coordinate. If the vertical air velocity is upwards, it is negative when expressed as a tendency of air pressure; downwards is positive.[CF-Standard Name]; unit: Pa s-1 mass_fraction_of_snow_in_air specific snow content [CF-Standard Name]; unit: kg kg-1 integral_of_surface_moisture_flux_wrt_time acc. moisture flux at surface; unit: not filled NetCDF 19910 https://www.wdc-climate.de/ui/entry?acronym=Narval2 information collection n/a None