Simulations for assessing model extensions using the obstacle-resolving model MITRAS

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

Simple

Date (Publication)
2025-04-22
Edition

1
Citation identifier
WINTER_HAM_MitrasModEx
Citation identifier
doi:10.26050/WDCC/WINTER_HAM_MitrasModEx
Principal investigator
  University of Hamburg - Dr. David Grawe
http://www.mi.uni-hamburg.de/
Author
  Climate Service Center Germany - Karolin S. Samsel
http://www.climate-service-center.de
Author
  University of Hamburg - Dr. Marita Boettcher
http://www.mi.uni-hamburg.de/
Author
  University of Hamburg - Dr. David Grawe
http://www.mi.uni-hamburg.de/
Author
  University of Hamburg - Prof. Dr. K. Heinke Schlünzen
http://www.mi.uni-hamburg.de/
Author
  Climate Service Center Germany - Dr. Kevin Sieck
http://www.climate-service-center.de
Publisher
  WDCC
Point of contact
  University of Hamburg - Dr. David Grawe
http://www.mi.uni-hamburg.de/
Name

NetCDF
Keywords

  • ATMODAT
Keywords

  • EASYDAB
Keywords

  • FOS: Earth and related environmental science
Keywords

  • Precipitation
Keywords

  • atmos
Keywords

  • atmosphere
Keywords

  • atmospheric model
Keywords

  • atmospheric precipitation
Keywords

  • obstacle-resolving model
Keywords

  • urban
Keywords

  • urban canopy effects
Keywords

  • wind field
Use limitation

CC-BY-4.0: Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/

Language

eng; USA
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Begin date
2000-01-21
End date
2000-01-21
Distribution format
  • NetCDF ()

Transfer size
1504
OnLine resource
https://www.wdc-climate.de/ui/entry?acronym=WINTER_HAM_MitrasModEx
Hierarchy level
collection
Attribute description
terminal_velocity_snow
Descriptor

not filled; unit: m s-1
Attribute description
lwe_thickness_of_surface_snow_amount
Descriptor

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
Attribute description
total_rain_water_content
Descriptor

not filled; unit: kg kg-1
Attribute description
total_cloud_water_content
Descriptor

not filled; unit: kg kg-1
Attribute description
surface_snow_density
Descriptor

[CF-Standard Name]; unit: kg m-3
Attribute description
upward_air_velocity
Descriptor

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
Attribute description
specific_humidity
Descriptor

"specific" means per unit mass. Specific humidity is the mass fraction of water vapor in (moist) air.[CF-Standard Name]; unit: kg kg-1
Attribute description
surface_altitude
Descriptor

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
Attribute description
air_temperature
Descriptor

Air temperature is the bulk temperature of the air, not the surface (skin) temperature. [CF-Standard Name]; unit: degC
Attribute description
sum_hourly_rainfall_at_surface
Descriptor

not filled; unit: mm
Attribute description
surface_albedo
Descriptor

The surface called "surface" means the lower boundary of the atmosphere.[CF-Standard Name]; unit: 1
Attribute description
x_wind
Descriptor

"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
Attribute description
air_pressure
Descriptor

air_pressure [CF-Standard Name]; unit: Pa
Attribute description
total_snow_water_content
Descriptor

not filled; unit: kg kg-1
Attribute description
sum_hourly_snowfall_amount_at_building_surface_roofs
Descriptor

not filled; unit: mm
Attribute description
y_wind
Descriptor

"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
Attribute description
surface_net_downward_longwave_flux
Descriptor

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
Attribute description
sum_hourly_snowfall_amount_at_surface
Descriptor

not filled; unit: mm
Attribute description
area_fraction
Descriptor

"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
Attribute description
air_density
Descriptor

[CF-Standard Name]; unit: kg m-3
Attribute description
sum_hourly_rainfall_amount_at_building_surface_roofs
Descriptor

not filled; unit: mm
Attribute description
vertical_exchange_coefficient_for_scalar_quantities
Descriptor

not filled; unit: m2 s-1
Attribute description
surface_roughness_length
Descriptor

The surface called "surface" means the lower boundary of the atmosphere.[CF-Standard Name]; unit: m
Attribute description
relative_humidity
Descriptor

relative_humidity [CF-Standard Name]; unit: 1
Attribute description
terminal_velocity
Descriptor

not filled; unit: m s-1
Attribute description
surface_net_downward_shortwave_flux
Descriptor

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
Attribute description
horizontal_exchange_coefficient_for_scalar_quantities
Descriptor

not filled; unit: m2 s-1
Attribute description
height
Descriptor

Height is the vertical distance above the surface. [CF-Standard Name]; unit: m
File identifier
wdc-climate.de:5285584 XML
Metadata language

eng; USA
Hierarchy level
collection
Hierarchy level name

WINTER_HAM_MitrasModEx
Date stamp
2025-04-07T10:20:21
Metadata standard name

ISO 19115
Metadata standard version

ISO 19115-2:2009
Point of contact
  University of Hamburg - Dr. David Grawe
http://www.mi.uni-hamburg.de/
 
 

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