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Anthropogenic Heat Flux Estimation from Space: The URBANFLUXES Project

Chrysoulakis, Nektarios and Feigenwinter, Christian and Al Bitar, Ahmad and Esch, Thomas and Del Frate, Fabio and Gabey, Andy and Gastellu-Etchegorry, Jean-Philippe and Grimmond, Sue and Heldens, Wieke and Klostermann, Judith and Lindberg, Fredrik and Mitraka, Zina and Olofson, Frans and Parlow, Eberhard (2016) Anthropogenic Heat Flux Estimation from Space: The URBANFLUXES Project. AMS 22nd Symposium on Boundary Layers and Turbulence, 20 – 24 June, 2016, Salt Lake City, USA.

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The H2020 project URBANFLUXES (URBan ANthrpogenic heat FLUX from Earth observation Satellites) investigates the potential of Copernicus Sentinels to retrieve anthropogenic heat flux, as a key component of the Urban Energy Budget (UEB). Temperatures in cities are predicted to rise even more in the future, resulting in increased energy demand for cooling systems in low and mid-latitude cities, modifying UEB. A positive feedback cycle occurs in many urban areas, where higher temperatures result in more energy being used for cooling, which in turn adds to heat emissions and increases temperatures further during periods with increased heat wave risk. It is expected that without mitigation measures, energy demand will continue to increase during the warmest months. URBANFLUXES advances the current knowledge of the impacts of UEB fluxes on urban heat island and consequently on energy consumption in cities. This will lead to the development of tools and strategies to mitigate these effects, improving thermal comfort and energy efficiency. In URBANFLUXES, the anthropogenic heat flux is estimated as a residual of UEB. Therefore, the rest UEB components, namely, the net all-wave radiation, the net change in heat storage and the turbulent sensible and latent heat fluxes are independently estimated from Earth Observation (EO), whereas the advection term is included in the error of the anthropogenic heat flux estimation from the UEB closure. A dense network of conventional meteorological stations is used in each case study city: London, Basel and Heraklion. EO data is initially analyzed to map urban surface morphology and cover, whilst a new approach has been developed to define appropriate zones for energy partitioning. Using these zones as a framework, advanced EO-based methods are used to estimate UEB fluxes: a sophisticated radiative transfer model (Discrete Anisotropic Radiative Transfer) was employed to simulate the net all-wave radiation; the computation of the storage term was based on the Element Surface Temperature Method, supported by the auxiliary datasets; and the estimation of the turbulent heat fluxes was based on the Aerodynamic Resistance Method, supported by standard meteorological measurements. In-situ flux measurements (Eddy Covariance, scintillometry) and bottom-up approaches (inventories, building energy models) were used to evaluate URBANFLUXES outcomes, whereas uncertainties were specified and analyzed. The project exploits Sentinels observations, which provide improved data quality, coverage and revisit times and increase the value of EO data for scientific work and future emerging applications. These observations can reveal novel scientific insights for the detection and monitoring of the spatial distribution of the urban energy budget fluxes in cities, thereby generating new EO opportunities. URBANFLUXES thus exploits the European capacity for space-borne observations to enable the development of operational services in the field of urban environmental monitoring and energy efficiency in cities. It is therefore expected to prepare the ground for further innovative exploitation of European space data in scientific activities (climate variability studies at local and regional scales) and future and emerging applications (sustainable urban planning, mitigation technologies) to benefit climate change mitigation/adaptation and civil protection. More information on the project can be found at http://urbanfluxes.eu.

Item URL in elib:https://elib.dlr.de/108447/
Document Type:Conference or Workshop Item (Poster)
Title:Anthropogenic Heat Flux Estimation from Space: The URBANFLUXES Project
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Chrysoulakis, Nektariosfoundation for research and technology - hellas (forth), heraklion, crete, greeceUNSPECIFIED
Feigenwinter, Christianuniversity of basel, basel, switzerlandUNSPECIFIED
Al Bitar, AhmadcesbioUNSPECIFIED
Esch, ThomasThomas.Esch (at) dlr.deUNSPECIFIED
Del Frate, Fabiogeo-kUNSPECIFIED
Gabey, Andyuniversity of readingUNSPECIFIED
Gastellu-Etchegorry, Jean-PhilippecesbioUNSPECIFIED
Grimmond, Sueuniversity of readingUNSPECIFIED
Heldens, WiekeWieke.Heldens (at) dlr.deUNSPECIFIED
Klostermann, Judithwageningen universityUNSPECIFIED
Lindberg, Fredrikgötheborg universityUNSPECIFIED
Mitraka, ZinaforthUNSPECIFIED
Olofson, Fransgötheborg universityUNSPECIFIED
Parlow, Eberharduniversity of basel, basel, switzerlandUNSPECIFIED
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:p. 1
Keywords:Sentinels; urban climate; urban energy budget
Event Title:AMS 22nd Symposium on Boundary Layers and Turbulence
Event Location:Salt Lake City, USA
Event Type:international Conference
Event Dates:20 – 24 June, 2016
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Vorhaben Fernerkundung der Landoberfläche (old)
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Land Surface
Deposited By: Heldens, Dr Wieke
Deposited On:28 Nov 2016 11:57
Last Modified:20 Jun 2021 15:48

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