Due to the expected increase in global temperature together with a predicted further densification of cities leading to an exacerbation of the urban heat island effect, health consequences caused by heat stress will become a growing risk for urban dwellers. Therefore, climate change adaptation is of particular importance for future urban planning, utilizing technical and nature-based solutions. High-resolution microclimate modelling and scenario analyses are a promising approach to evaluate thermal effects of climate change adaptation measures in urban areas. Aiming to gain knowledge regarding the involvement of citizen science into high-resolution urban microclimate modelling on quarter-scale and investigating effects of urban acupuncture in the context of heat mitigation, a physically-based, 3D-gridded ENVI-met model is setup and parameterized based on field measurements for a 16-ha residential study area in Cologne/Germany. The model is validated using a quality-controlled, standardized and distributed citizen science network of 57 sensors within the heterogeneous study area. The establishment of the citizen science network combines the scientific requirement of high resolution and accuracy with the participation and activation of stakeholders needed for later implementation of climate change adaptation measures. The study presented here is unique with respect to integration of citizen science into numerical modelling and with regards to the holistic model validation approach on a city quarter-scale including a 20-year heat event in Cologne in July 2022. A mean Nash-Sutcliffe model efficiency of 0.89 up to 0.97 for simulated air temperature underlines the accurate fit of the model to citizen sensor measurements. Significant microclimatic patterns and mean differences of up to 4.8 Kelvin between spatial units like greened inner courtyards and ungreened street corridors were identified within the study area. In the context of urban acupuncture, this shows the heat mitigation potential of climate change adaptation measures which can enable cooling effects in a magnitude of global warming and being relevant for increasing thermal comfort and human wellbeing.
扫码关注我们
求助内容:
应助结果提醒方式:
