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Effects of Spatial Pattern of GreenSpace on Land Surface Temperature: A case study on Oasis City Aksu, northwest China
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Resumo(s)
The urban heat island (UHI) refers to the phenomenon of higher atmospheric and
surface temperatures occurring in urban areas than in the surrounding rural areas.
Numerous studies have shown that increased percent cover of greenspace (PLAND)
can significantly decrease land surface temperatures (LST). Fewer studies, however,
have investigated the effects of configuration of greenspace on LST. This thesis aims
to fill this gap using oasis city Aksu, northwest China as a case study. PLAND along
with two configuration metrics were used to measure the composition and
configuration of greenspace. The metrics were calculated by moving window method
based on a greenspace map derived from Landsat Thematic Mapper (TM) imagery,
and LST data were retrieved from Landsat TM thermal band. Normalized mutual
information measure was employed to investigate the relationship between LST and
the spatial pattern of greenspace. The results showed that PLAND was the most
important predictor of LST. Configuration of greenspace also significantly affected
LST. In addition, the variance of LST was largely explained by both composition and
configuration of greenspace. Results from this study can expand our understanding of
the relationship between LST and vegetation, and provide insights for improving
urban greenspace planning and management.
Descrição
Dissertation submitted in partial fulfillment of the requirements for the Degree of Master of Science in Geospatial Technologies.
Palavras-chave
Urban heat island Urban greenspace Landscape metrics Configuration Thermal infrared remote sensing Normalized mutual information measure