Microclimatic field measurements to support microclimatological modelling with ENVI-met for an urban study area in Cologne

Abstract. Cities are particularly affected by climate change impacts. Due to global warming, the frequency and intensity of summer heat events increases for many cities around globe. Urban climatological studies have shown significant positive trends in number hot days tropical nights. Heat stress is an important health as well economic risk. Thus, urban planning needs adapt change. This requires a sound scientific analysis different adaptation measures management options, which must be based on appropriate data, models scenarios assess their suitability efficacy. The goal this paper low cost weather station network consisting 33 NETATMO sensors ultrasonic anemometers measure air temperature, relative humidity, wind speed direction 16 ha study area Cologne with high temporal spatial resolution support microclimatological modelling. temperature humidity were calibrated against research grade reference sensor under laboratory conditions. In addition, meteorological (Campbell Sci.) was set up reference. placed identify local microclimatic effects due surface types, vegetation building structures. Using descriptive statistical analyses pairwise comparisons, differences conditions various sites found, can clearly attributed specific small scale microclimate factors. Significant identified comparing avenue narrow street backyard park area. proved provide data reliably suitable quality effects. choice lends itself citizen participation, needed facilitate adaptation. our further research, will used modelling ENVI-met investigating options mitigating