Evaluating functional traits of urban green spaces in mitigating land surface temperature in megacities
Abstract Urban green spaces (UGS), along with their quality and geographical distribution across urban landscapes, are increasingly recognized for their vital role in mitigating socio-environmental challenges. Therefore, the present study illustrates a methodological framework to comprehensively eva...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Springer
2025-04-01
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| Series: | Discover Cities |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s44327-025-00074-2 |
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| Summary: | Abstract Urban green spaces (UGS), along with their quality and geographical distribution across urban landscapes, are increasingly recognized for their vital role in mitigating socio-environmental challenges. Therefore, the present study illustrates a methodological framework to comprehensively evaluate the UGS quality and its dynamics in a metropolitan city region (Delhi-NCR), integrating key biochemical and biophysical parameters. The long-term Mann Kendall trend and Sen’s slope (2002–2022) exhibited significant positive trends in LAI, FAPAR, and NDVI, underscoring enhanced vegetation productivity, particularly in winter. The high-resolution Sentinel 2A-based Radiative Transfer Model (RTM) and Light-Use Efficiency (LUE) models exhibited seasonal variations in biophysical properties, quality, and productivity of green spaces in the urban and peri-urban regions during 2016–2022. The core urban areas recorded a decline in GPP (-31.81%) in summer during 2022, while an increase (36.36%) was observed in winter in the peri-urban region primarily across the Aravalli ridge. The study highlighted the high carbon sequestration potential of UGS that leads to a reduction in daytime summer LST (~ 0.4 °C). Additionally, time-series analysis highlighted the more pronounced reduction in LST during summer daytime (by ~ 5 °C) contributing to their critical role in urban cooling. The principal component analysis (PCA) based quality assessment of UGS quantified the hotspots of degraded UGSs. This research provides a novel framework for understanding the critical role of UGS quality in improving urban resilience, offering a strategic pathway for enhancing sustainability in rapidly urbanizing megacities. |
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| ISSN: | 3004-8311 |