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Direct measurement of energy balance and carbon dioxide exchange over a suburban area

Team: Matthias Roth, Erik Velasco and Christer Jansson

Urbanization strongly affects the surface partitioning of the incoming energy delivered by the sun into radiation, heat and mass fluxes. The nature of this partitioning defines the particular microclimate of a location. Behavioural patterns of people further affect the various fluxes through adding anthropogenic heat to the energy balance and the emission of carbon dioxide from human metabolism and fuel combustion. This project quantifies the energy and carbon dioxide exchange over a suburban neighborhood applying micrometeorological methods (eddy covariance approach), in combination with models to determine the precise nature of the urban surface influencing the measurements.

The overall aim of this project is to assess how land cover and built form affect climate variables important for the well-being of people living in Singapore. Climate data will be collected using a network of fixed wireless stations, and vertical sampling using an UAV at the fixed stations to provide a limited characterisation of the 3-D nature of the urban canopy layer (i.e. the lowest layer of the urban atmosphere). The observations will be integrated to demonstrate how air temperature, humidity and CO2 concentration are influenced by spatial variations of different types of land cover and utilization, and in the course of seasonal change of meteorological conditions.

Integrated, multi-dimensional measurements of temperature, humidity and carbon dioxide over different land uses

Team: Minghong Yu, Matthias Roth and Winson Chow

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