2026-04-14T14:44:39Z
http://dmoai.cloud.dkrz.de/oai/provider
oai:wdcc.dkrz.de:iso_5285584
2026-04-13T23:09:44Z
iso-wdcc-doi
wdc-climate.de:5285584
eng; USA
collection
WINTER_HAM_MitrasModEx
Dr. David Grawe
University of Hamburg
http://www.mi.uni-hamburg.de/
pointOfContact
2025-04-07T10:20:21
ISO 19115
ISO 19115-2:2009
Simulations for assessing model extensions using the obstacle-resolving model MITRAS
2025-04-22
publication
1
WINTER_HAM_MitrasModEx
doi:10.26050/WDCC/WINTER_HAM_MitrasModEx
Dr. David Grawe
University of Hamburg
http://www.mi.uni-hamburg.de/
Email: david.grawe@uni-hamburg.de
principalInvestigator
Karolin S. Samsel
Climate Service Center Germany
http://www.climate-service-center.de
Email: karolin.samsel@hereon.de
author
Dr. Marita Boettcher
University of Hamburg
http://www.mi.uni-hamburg.de/
Email: marita.boettcher@uni-hamburg.de
author
Dr. David Grawe
University of Hamburg
http://www.mi.uni-hamburg.de/
Email: david.grawe@uni-hamburg.de
author
Prof. Dr. K. Heinke Schlünzen
University of Hamburg
http://www.mi.uni-hamburg.de/
Email: heinke.schluenzen@uni-hamburg.de
author
Dr. Kevin Sieck
Climate Service Center Germany
http://www.climate-service-center.de
Email: kevin.sieck@hzg.de
author
WDCC
publisher
This dataset contains the results of nine simulations performed for the validation of the snow cover and precipitation scheme used in the microscale, obstacle-resolving model MITRAS v3.0 (Salim et al., 2013; Schluenzen et al., 2018), v3.1 (Ferner et al. 2023), and v3.3 (Samsel et al. 2025, in review). The model domain extends 240 m x 210 m horizontally and includes orography, slanted roofs, obstacle corners and different surface cover classes. The simulations were performed using different model versions, initial temperatures, precipitation and processing modes. The simulations cover 62 minutes model time, starting at 7:30 am model time, with a temporal resolution of 5 seconds or 5 minutes. This dataset contains a selection of output variables, control variables are not included.
The file names of the data sets are composed as follows.
{temperature}_{intensity}_{model version}_{comment}_{case ID}.nc
There are 3 intensities for temperature: low, medium, high
Associated values are:
T_low = 272 K, T_medium = 280 K, T_high = 288 K
Three versions are considered: v3p0 = MITRAS v3.0 (initial version), v3p1 = MITRAS v3.1 (inclusion of warm rain scheme), v3p3 = MITRAS v3.3 (inclusion of winter parameterisation scheme)
Special cases are 'noparallel', where the simulation was performed with the parallelisation mode switched off, and 'noprecip', where no precipitation is initialised.
Example:
T_high_v3p1_Hwr.nc
Dr. David Grawe
University of Hamburg
http://www.mi.uni-hamburg.de/
pointOfContact
NetCDF
ATMODAT
EASYDAB
FOS: Earth and related environmental science
Precipitation
atmos
atmosphere
atmospheric model
atmospheric precipitation
obstacle-resolving model
urban
urban canopy effects
wind field
CC-BY-4.0: Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/
eng; USA
10.0003
10.0037
53.5475
53.5492
Local Solar Time in arbitrary year
2000-01-21
2000-01-21
terminal_velocity_snow
not filled; unit: m s-1
lwe_thickness_of_surface_snow_amount
The surface called "surface" means the lower boundary of the atmosphere. "lwe" means liquid water equivalent. "Amount" means mass per unit area. The construction lwe_thickness_of_X_amount or _content means the vertical extent of a layer of liquid water having the same mass per unit area. Surface amount refers to the amount on the ground, excluding that on the plant or vegetation canopy.[CF-Standard Name]; unit: m
total_rain_water_content
not filled; unit: kg kg-1
total_cloud_water_content
not filled; unit: kg kg-1
surface_snow_density
[CF-Standard Name]; unit: kg m-3
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
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
surface_altitude
The surface called "surface" means the lower boundary of the atmosphere. Altitude is the (geometric) height above the geoid, which is the reference geopotential surface. The geoid is similar to mean sea level.[CF-Standard Name]; unit: m
air_temperature
Air temperature is the bulk temperature of the air, not the surface (skin) temperature. [CF-Standard Name]; unit: degC
sum_hourly_rainfall_at_surface
not filled; unit: mm
surface_albedo
The surface called "surface" means the lower boundary of the atmosphere.[CF-Standard Name]; unit: 1
x_wind
"x" indicates a vector component along the grid x-axis, when this is not true longitude, positive with increasing x. 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
air_pressure
air_pressure [CF-Standard Name]; unit: Pa
total_snow_water_content
not filled; unit: kg kg-1
sum_hourly_snowfall_amount_at_building_surface_roofs
not filled; unit: mm
y_wind
"y" indicates a vector component along the grid y-axis, when this is not true latitude, positive with increasing y. 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_net_downward_longwave_flux
The surface called "surface" means the lower boundary of the atmosphere. "longwave" means longwave radiation. "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). In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics.[CF-Standard Name]; unit: W m-2
sum_hourly_snowfall_amount_at_surface
not filled; unit: mm
area_fraction
"Area fraction" means the fraction of horizontal area. To specify which area is quantified by a variable of "area_fraction", provide a coordinate variable or scalar coordinate variable of "area_type". Alternatively, if one is defined, use a more specific standard name of "X_area_fraction" for the fraction of horizontal area occupied by X. [CF-Standard Name]; unit: 1
air_density
[CF-Standard Name]; unit: kg m-3
sum_hourly_rainfall_amount_at_building_surface_roofs
not filled; unit: mm
vertical_exchange_coefficient_for_scalar_quantities
not filled; unit: m2 s-1
surface_roughness_length
The surface called "surface" means the lower boundary of the atmosphere.[CF-Standard Name]; unit: m
relative_humidity
relative_humidity [CF-Standard Name]; unit: 1
terminal_velocity
not filled; unit: m s-1
surface_net_downward_shortwave_flux
The surface called "surface" means the lower boundary of the atmosphere. "shortwave" means shortwave radiation. "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). In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics.[CF-Standard Name]; unit: W m-2
horizontal_exchange_coefficient_for_scalar_quantities
not filled; unit: m2 s-1
height
Height is the vertical distance above the surface. [CF-Standard Name]; unit: m
NetCDF
1504
https://www.wdc-climate.de/ui/entry?acronym=WINTER_HAM_MitrasModEx
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