Can canopy temperature acquired from an airborne level be a tree health indicator in an urban environment?

• DOI: 10.1016/j.ufug.2022.127807
• Publication Date: 2022-11-30T07:40:16Z
• Authors: Agata Zakrzewska; Dominik Kopeć; Adrian Ochtyra; Markéta Potůčková
• Keywords: Microclimate; Urban Heat Island; Tree health; Tree canopy; Tilia

Nowadays, gathering information about tree health conditions in cities is necessary. Trees are essential regulating urban microclimate and mitigating the heat island effect. Therefore, their status should be crucial vegetation monitoring. The growing number of new cameras, sensors research methods allows for a broader application thermal data remote sensing studies. This aimed to evaluate whether it possible use infrared assess condition selected species deciduous trees an environment. More specifically, must have 3.6–4.9 µm spectral range, obtained during day night. For this purpose, was carried out city center Warsaw (Poland) 2020. During airborne acquisition, data, laser scanning RGB images were collected. Synchronously with 617 ground references different classes (healthy, slightly poor condition, dying) five species: Acer platanoides, pseudoplatanus, Aesculus hippocastanum, Tilia cordata × euchlora. results as follows: (i) healthy cooler than dying both daytime nighttime; (ii) difference canopy temperatures between 1.06 °C mean value on nighttime 3.28 data; (iii) all significantly differ from each other data. aerial can considered alternative hyperspectral Thermal represents another method assessing environment – especially day, which differentiate better at based fusion could quick efficient solution identifying health.