Work package P2: Evaluation of human thermal comfort/stress and planning Adaptation possibilities in urban Areas


Contact information

Principal investigators: Prof. Dr. Andreas Matzarakis mail.gif

Institution: Research Center Human Biometeorology, Deutscher Wetterdienst (http://www.dwd.de)

Goals of WP-P2

The variability of thermal comfort and heat stress in urban micro climate depends on the factors affecting human energy balance and the modification of the meteorological conditions in micro scale, mainly air temperature, wind speed, wind direction, air humidity, as well as short- and longwave radiation fluxes. Urban structures, with their specific morphology, surface characteristics and physical properties, modify the background conditions and generate an urban climate. The human-biometeorological micro scale conditions in urban areas have to be quantified in different temporal and spatial contexts. This requires the knowledge of urban morphology, surface characteristics and properties, as well as their effect on micro climate. The meteorological information have to be available at the height of the human gravity center (1.1 m) to allow for an adequate assessment focusing on humans in cities and specific places. For this approach the human energy balance can be applied. Consequently, equivalent temperatures can be used, which are able to describe the integral thermal environment of the human body. The equivalent temperatures describe the overall assessment of the thermal environment by transferring outdoor conditions and the related energy fluxes to an indoor environment with the same thermal perception. Well-known equivalent temperatures are physiologically equivalent temperature (PET), perceived temperature (PT) and Universal Thermal Climate Index (UTCI) which are broadly used and applied for different purposes.


Work program

WP-P2.1: Development of Human Thermal Comfort Module (HTCM)

WP-P2.1 deals with the development of a module for the calculation of factors affecting micro climate based on the RayMan and SkyHelios models. Additionally required input data such as sky view factors will be provided by PALM-4U. Moreover, the wind conditions for humans as well as mean radiant temperatures provided by other modules will be considered. A sensitivity study will be performed for the different resolution of factors influencing thermal indices. A first test version (Euler + MAM) will be provided after 18 months. The model and the methods used will be documented.

WP-P2.2: Climate maps and sensitivity studies of HTCM

Visualization products (climate maps etc.) will be developed based on existing climate mapping tools, for the HTCM in close cooperation with WP-D2. Moreover, uncertainty and sensitivity analyses will be performed regarding thermal indices, resolutions, and model parameters. Reduction possibilities will be assessed. The HTCM output data will be compared and validated with existing measurements. A tested version will be provided after two years.

WP-P2.3: Application of HTCM

HTCM will be tested for the demo cities for the selected scenarios from the previously defined catalog. A key objective will be the identification of deficiencies of the HTCM and to provide a final and validated version. Moreover, interpretation aids and practical applications will be developed. A final documentation will be prepared.

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