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| Titel |
First characterization and comparison of TEB model simulations with in situ measurements regarding radiation balance in a single urban canyon at the BOKU site (Vienna) |
| VerfasserIn |
Sandro Oswald, Heidelinde Trimmel, Michael Revesz, Imran Nadeem, Valéry Masson, Philipp Weihs |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250143288
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| Publikation (Nr.) |
 EGU/EGU2017-6994.pdf |
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| Zusammenfassung |
| According to the World Health Organization more than half of the world population lives in a
city since 2010. Predictions foresee that by 2030 six out of ten people will live in an
urban area. As a result, many cities are expanding in size. Almost 10% of all urban
dwellers live in megacities (defined according to UN HABITAT as a city with a
population of more than 10 million). There are several effects in cities which strongly
influence human health. Visible influences like the severe emissions of air pollutants by
industry and traffic (e.g. Mayer H., 1999, Grimmond et al., 2010) are obvious to
people but thermal stress in urban areas is only recently recognized for its strong
devastating effect on human health. As a consequence, the urban environment virtually
influences all weather parameters that have an impact on human comfort and thermal
stress.
Within this study, we investigate effects of city growth and the development of outlying
districts on the local climate of Vienna. We focus particularly on the influence of urban
heat island and consequent the risk for heat related illnesses or thermal stress for
people. To quantify radiation balance and other important meteorological factors,
we performed an extensive field campaign with three types of net radiometer in
three different heights at BOKU site in August 2016. The first results indicated a
strong correlation (ρ=0.96) between the Town Energy Balance (TEB) model and
the measurements of the top net radiometer regarding radiation balance at roof
level, meanwhile the TEB results are slightly underestimated. Further check if the
measurements are reasonable, a comparison of the input values (global and direct solar
radiation) for the TEB simulation with Secondary Standard measurements of ARAD
site Wien Hohe Warte shows a deviation under 2% concerning interquartile range
on clear sky days. The next steps will enclose TEB simulations, coupled with the
mesoscale Weather Research and Forecasting (WRF) model, for whole Vienna including
outlying districts and will quantify a possible future urban climate scenario until
2030.
References:
Grimmond C.S.B., et al.: Climate and More Sustainable Cities: Climate Information for
Improved Planning and Management of Cities (Producers/Capabilities Perspective). Procedia
Environmental Sciences 1, 247-274, 2010.
Mayer H.: Air pollution in cities. Atmospheric Environment, 33, 4029 - 4037, 1999. |
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