Dear Colleagues,

Cities have been considered a herald for future environmental and climate change, as they are experiencing changes such as higher levels of light at night, higher carbon dioxide emissions, greater levels of pollution, increased ambient temperatures, enhanced nutrient deposition, and altered precipitation patterns. In the meantime, more than 50% of the global population already lives in cities, and that number is projected to be ~70% by 2050. As the urban environment continues growing and encroaching into natural environments, it is necessary to understand how urban environmental and climatic changes impact plant physiological functions that are critical to the provision of ecosystem services. These topics are also important for understanding and managing the fluxes of heat, water, carbon, and nutrients that can help cities develop livable, sustainable, and resilient plans to adapt to future global climate change.

While plants are an integral part of most nature-based solutions to environmental and societal challenges, studies in eco-physiological functions are limited to individual plants. As remotely sensed images at both high spatial and temporal resolutions are available, there is a chance to scale up our understanding from leaf to individual plants and to the landscape level. Thus, in this Special Issue, we seek contributions leveraging remote sensing and/or other types of datasets and techniques that can help elucidate changes in the plant eco-physiological functions associated with various environmental alterations in cities. These topics can include, but are not limited to:

• Urban green space and its function;
• Urban plant phenology and productivity;
• Light pollution/impacts on vegetation;
• Urban extreme climates such as drought and heat waves on plants;
• Plant evapotranspiration;
• Plant diversity and invasive species in cities;
• The relationship between building environment and vegetation structure;
• Carbon, nutrient, and water fluxes using eddy covariance and remote sensing;
• Airborne/satellite solar-induced fluorescence for characterizing urban vegetation.

Dr. Peng Fu
Dr. Xiaonan Tai
Prof. Dr. Xiang Zhang
Guest Editors

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