Scholarlink

<p>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&#xa0;°C). Additionally, time-series analysis highlighted the more pronounced reduction in LST during summer daytime (by ~ 5&#xa0;°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.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Evaluating functional traits of urban green spaces in mitigating land surface temperature in megacities

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年4月2日

查看全文
  • Manjari Upreti,
  • Amit Kumar

摘要

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.