A holistic microclimate model

====== Output Files: Atmosphere data (_AT_) ====== <WRAP box left 80%> <WRAP box left 40%> ^ Dimension ^ Nr Variables ^ Format ^ | 3D | 43 (with Spray) | Binary (EDX/EDT) | </WRAP> **Atmosphere Data** Contains the general model state of the 3D atmospheric ENVI-met model from the first level above ground to the top of the 3D model. </WRAP> <WRAP clear></WRAP> The Atmosphere data files are produced each main output interval (default: 60 min) and represent the general state of the atmosphere at the given model time. These files contain a broad selection of different items from simple meteorological data such as wind speed and air temperature up to detailed information such as plant CO2 fluxes. Using the _AT_ files, most of the processes in the atmosphere can be analysed. However, there are further files concerning the atmosphere dealing with more specific topics such as radiation or pollutant dispersions. Note, that the surface data are not part of the atmosphere data, but of the surface and flux (_FX_) files. <WRAP box left 80%> ==== Variable list ==== <fs x-small>This list represents the general variable structure. The actual sequence of the variables might differ but the same information is stored in total.</fs> | |**Variable** |**Unit** |**Description** | | |Objects| -| Single object IDs to visualize the model domain. Meaning of the different IDs is stored in LEONARDO Special Layer Definition Files | | |Flow u | m/s | Wind speed. Vector component along the West-East axis (+: East, -: West) | | |Flow v | m/s | Wind speed. Vector component along the North-South axis (+: South, -: North) | | |Flow w | m/s | Wind speed. Vector component along the vertical axis (+: up, -: down) | | |Wind Speed | m/s | Wind speed. Vector sum over all 3 axis | | |Wind Speed Change | % | Wind speed change in percent referring to the undisturbed inflow profile at the same height level.| | |Wind Direction | deg | Wind direction of horizontal component in geographic reference (0: N..90:E..180:S etc) | | |Pressure Perturbation | Pa | Dynamic pressure as a result of the wind field calculation. Pressure values will add up over time, use spatial difference values only if required| | | Air Temperature | °C | Potential air temperature at reference (and model default) pressure. For the 3D model, it can be treated like the absolute air temperature| | | Air Temperature difference to Inflow | K| Difference between the local air temperature and the reference air temperature at inflow at the same height level | | | Air Temperature Change | K/h | Changes of air temperature compared to the last _AT_ output file | | | Specific Humidity | g/kg | Specific air humidity | | | Relative Humidity | % | Relative air humidity (Caution: Depends both on Specific air humidity and air temperature)| | | TKE | m²/m³ | Local Turbulent Kinetic Energy | | | TKE Dissipation | m³/m³ | Local dissipation rate of Turbulent Kinetic Energy| | | Mean Radiant Temperature | °C | The composed radiative fluxes and air temperature for a standing person| | | Vertical Exchange Coefficient Impulse | m²/s | Calculated vertical exchange coefficient for impulse| | | Horizontal Exchange Coefficient Impulse | m²/s | Calculated horizontal exchange coefficient for impulse (At the moment for microscale assumed to be equal to the vertical exchange coefficient) | | | Direct Shortwave Radiation | W/m²| Available direct solar radiation referring to a reference surface perpendicular to the incoming sun rays (maximum value before applying Lamberts' law) | | | Diffuse Shortwave Radiation | W/m² | Available diffuse solar radiation referring to a horizontal reference surface | | | Reflected Shortwave Radiation | W/m² | Availablereflected solar radiation from the environment referring to a horizontal reference surface | | | Air Temperature Change through LW Cooling | K/h | Effect of longwave radiation divergence on air temperature per time | === Vegetation Data === | | Vegetation LAD | m²/m³ | One-sided Leaf Area Density (Surface of leaf area per m³ air) | | | Leaf Temperature | °C | Temperature of the leaf | | | Temperature Flux at Leaf | K*m/s | Temperature Flux in K from leaf to atmosphere | | | Stomata Resistance | s/m | Actual resistance of stomata to vapour transfer| | | Vapour Flux at Leaf | g/kg*m/s | Evaportation and transpiration flux on leaf per leaf area unit| | | Water on Leaf | g/ m² | Liquid water on leaf per leaf area| === CO2 === | | CO2 |mg/m³ | Atmospheric CO2 | | | CO2 | ppm | Atmospheric CO2| | | CO2 Flux at Leaf | mg/kg*m/s | CO2 Flux at leaf per leaf area unit| === Water Spray (only if active) === | | Spray source |g/s | Actual emission rate of water spray at source | | | Spray concentration | g/m³ | Mass of water spray in the air | | | Spray evaporation | g/(m³s) | Local evaporation rate of water spray| | | Spray Cooling | K/s | Local cooling rate of air due to water spray evaporation| === Other Data === | | Local Mixing Length | m | Local mixing length calculated from TKE model| | | TKE normalised with 1D model | - | Local TKE normlized to 1 with 1D reference model | | | Dissipation normalised with 1D model | - | Local TKE dissiplation normlized to 1 with 1D reference model | | | Km normalised with 1D model | - | Local Km normlized to 1 with 1D reference model | | | TKE Mechanical Turbulence Production | ( ) | Local TKE mechnical production normlized to 1 with 1D reference model | | | Div Rlw Temp change | K/h | Radiative cooling/heating rate of air due to longwave radiation divergence | | | Building Number | - | Internal Building Number | </WRAP> <WRAP clear></WRAP>

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