ArticleBiology2026
Greening and Land Surface Temperature in Newly Expanded and Old Built-Up Areas Across Urban Development Stages in the Yangtze River Delta.
Article in Biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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5 authors.
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Abstract
Vegetation greenness helps cool cities, but how its cooling effect changes over time in newly expanded and existing old built-up areas (BUAs) across different urban development stages remains poorly understood. This study investigated the spatiotemporal trends of the Normalized Difference Vegetation Index (NDVI) and land surface temperature (LST) within newly expanded and old BUAs across cities of different development stages from 1992 to 2020. Utilizing the ESA CCI dataset for BUA delineation and Landsat-derived NDVI and LST, we applied the Mann-Kendall test and Sen's slope estimator to analyze 26 core cities. City sizes were classified into five categories from small cities to super megacities based on their status, and then assigned to urban development stages ranging from Stage 4 (least developed) to Stage 1 (most developed). The results revealed a significant decrease in NDVI across all areas in both new BUA (average significant slope = -0.0009,
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