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The impact of future climate change on urban microclimate: micro-scale simulations in the city of Athens

Samiou, Athina and Lannon, Simon 2014. The impact of future climate change on urban microclimate: micro-scale simulations in the city of Athens. Presented at: Adaptation Strategies to Global Environmental Change in the Mediterranean City and the Role of Global Earth Observations, Athens, Greece, 10-11 June 2014.

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Cities are the centres of human activities, where half of the world's population lives. Due to their artificial landscapes, urban areas appear different climatic conditions from neighbouring rural areas, mostly ex-pressed through elevated temperature levels, known as “Heat Islands”. Urbanized areas are also significant contributors to global warming and direct receivers of its negative effects. Estimating the effects of global warming on local urban microclimates in the future and ways to mitigate them is a crucial field of open scientific research. The present Thesis deals with the case of Athens, capital of Greece. It focuses on the scale of an existing neighbourhood in the city’s core. It aimed to study and model the likely impacts of a changing climate on its microclimatic conditions until the end of the 21st century (for 2020, 2050 and 2080) under two extreme IPCC emissions scenarios (B1 and A2). An additional goal was to estimate the contribution of Vegetation as a mitigation strategy to an improved outdoor environment for the specific neighbourhood within the same timeframe and emissions scenarios. With the help of Mete-onorm V.07 Weather Generator, future weather files for both scenarios were produced, which were then used for microclimatic simulations with the software ENVI-met V.3.1, of the coldest, a midseason and the hottest day of the year under clear sky conditions. A preliminary set of trial simulations revealed inconsistent results for overcast days. Air temperature levels for almost all examined days appeared uplifting trends. Vegetative covering offered a cooling effect for the hottest days with the highest temperatures, unfolding its positive contribution to the neighbourhood’s future microclimatic conditions. Simulation results showed reduced temperatures for these days with higher wind speed levels. Overall, the project mirrors the need to take measures within densely parts of the city in order to maintain its future liveability.

Item Type: Conference or Workshop Item (Poster)
Status: Published
Schools: Architecture
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
N Fine Arts > NA Architecture
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Last Modified: 04 Jun 2017 06:29

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