Helsinki Microclimate Simulation Demonstration

This analysis has a simulated microclimate for one block in Punavuori, Helsinki. Urban microclimate is the climate of any urban area that differs from its surrounding area. A thermal island is a microclimate created when an urban area becomes warmer than the surrounding area. The aim of the simulation of the microclimate of cities is to study urban heat island phenomena and to understand the cause and effect of the built environment and heat island phenomenon. The analysis was carried out with Solene-microclimat software. The software simulates a 3D model of microclimate components, such as air temperature, sun exposure and wind speed in a given area. The above simulation results are available in the following formats for each hour of the day on July 15th. SHP format files can be visualised in spatial data software. Environmental variables are presented in CSV format, which can be attached to 3D format files on the basis of their common variable ‘cell_ID’. VTU format files can be visualised using Paraview software. Each simulated class has its own VTU file. **The simulation results include:** — Surface temperature in degrees Celsius (°C) as a net (2D) for all surfaces of the simulation area. — Air temperature in degrees Celsius (°C), net (2D) and triangular network (3D) for all surfaces in and above the simulation area and 3D mode. The air temperature of a 2D network representing tree surfaces represents the surface temperatures of the tree leaves. — The overall thermal comfort index in degrees Celsius (°C) as a network (2D) for the area of the simulation area that does not include walls, roofs and trees of buildings. — Relative humidity in % x 100 as net (2D) on all surfaces of the simulation area. — Wind speed and direction (m/s), as triangular network (3D), for 3D mode above the simulation area. — Evaporation (mm/s) as a net (2D) on surfaces representing green areas and water bodies. Coordinate system used: ETRS-GK25 (EPSG:3879) **Vector levels:** — Air_point_SHP — Surface_trinagle — Surface_point **Other files:** — air_data_2021_07_15.csv — surface_data_2021_07_15.csv — 2D-meshes (VTU) — 3D-tetrahydron (VTU) **Atributes of vector levels and their descriptions:** — ‘Tair’: Air Temperature — ‘Tsurf’: Surface Temperature — ‘ET’: Evapotranspiration — ‘RelatHumid’: Relative Humidity — ‘UTCI’: Universal Thermal Climate Index — ‘Time’: Timestep **Other data sources:** — [3D building data] (https://hri.fi/data/fi/dataset/helsingin-3d-kaupunkimalli) — [Register] (https://hri.fi/data/fi/dataset/helsingin-kaupungin-puurekisteri) — [Register of Common Territories] (https://hri.fi/data/fi/dataset/helsingin-kaupungin-yleisten-alueiden-rekisteri) — [Helsinki surface model] (https://hri.fi/data/fi/dataset/helsingin-pintamalli) — [national surface model] (https://www.maanmittauslaitos.fi/tutkimus/teematietoa/korkeusmallit) — [target] (https://ilmatieteenlaitos.fi/) — [coverage material] (https://kartta.hel.fi/) — [Helsinki building register] (https://hri.fi/data/fi/dataset/helsingin-rakennukset) The analysis was carried out by Ecoten – Urban Comfort.