Cities and urban environments become increasingly important in both scientific and socio-economic perspectives. As urbanization processes continue across the world, its representation, impact, and understanding need to be further studied in order to fully comprehend the extent of their impact on weather and/or climate and their extremes. Key challenges to this task are the level of complexity and multi-scale dimension of diverse urban environments.

Urban environment, in general, includes industrial zones which are on one hand limited by existing climate but on the other hand they make an impact on the surrounding environment including climate. Further to the air and water quality issues connected with industrial production water consumption, energy production and low level of resilience to climate extremes increase the general risks in industrialized urban areas. Climate change impacts are obvious and adaptation strategies have to include explicit recognition between climate issues and industrialization. All this makes an issue regarding the urban climate in terms of living conditions.

This session presents and explores aspects of cities and urban environments within the Earth system. We welcome modeling and observational studies that aim to investigate different aspects of urbanization (e.g. urban heat island, population vulnerability, urban/peri-urban agriculture) and their feedback on the climate system and extremes. Novel methods that aim to assess urban representation and/or to bridge the different scales of representation within numerical models are encouraged. The impact of cities on weather, climate and/or their extremes (e.g. drought, precipitation), as well as on climate change and on population and adaptation will also be discussed in this session.

Topics may include:
• new urban parameterizations, methods to derive urban parameters for numeric models
• implementation of climate mitigations, adaptation strategies and self-government policies in cities and urban context
• impact of the different urban parameterizations on the atmosphere dynamics and on the different scales
• the impact of the urbanization including estate industrial on weather and/or climate extremes
• field measurements of urban climate, e.g. urban heat island
• impact of different surfaces (green areas, impermeable outer surfaces etc.) on climate and/or its extremes in build-up areas
• population vulnerability to urban climate and climate change
• extreme events (e.g. drought, rainfall events) impacts on town agglomeration
• urban and peri-urban agriculture