Abstract
The understanding of microclimatic changes driven by urbanization is of crucial importance in the context of global warming and climate change. This study examines the land surface temperature (LST), the normalized difference vegetation index (NDVI) and changes to the land use types for 10 capital cities between 2001 and 2021. Using Modis satellite data, which were processed on the platform of Google Earth Engine (GE), the analysis focused on the median values, which in the difference between Differentiations and alcohols, as well as the differentiation of previous types and night types as well as on the dynamics of vegen in LSST and the dynamics and dynamics and dynamics in the day and night night, and the dynamics. The global mean -Lst trend from 2001 to 2021, which comes from the data from Terra Modis Mod11a2, was found by 0.025 ° C/year. The analysis of day and night and night (nightly) land surface temperature trends (LSt) in the ten cities examined in this study shows remarkable variations, with most cities have an increasing trend in the LST in urban mosaics. Airports showed an average daily surface temperature (LST), which was 2.5 ° C higher than the surrounding areas, while the industrial zones showed an even larger temperature differences with an average increase of 2.81 ° C. In contrast, cold spots, which are characterized by dense vegetation, showed a remarkable cooling effect, whereby LST differences reached –3.7 ° C. Similarly, the proximity to water reduction contributed to the temperature reduction, since areas near significant water sources caught lower LST differences a day at an average of –4.09 ° C. A strong negative correlation between NDVI and LST was found, which underlines the cooling effect of vegetation through evapotranspiration and shading. This study offers a comprehensive global perspective on the similarities of the dynamics of the city temperature in cities in various geographical regions and climate zones and contributes to a deeper understanding of the changes in urbanization and land use, which influence the surface temperatures and climate change.
This recently published article examines the land surface temperature, a vegetation index and changes in land use types for 10 capitals between 2001 and 2021. Most cities showed an increasing trend of surface temperatures.
Figure 3. Global LSt trend (Slope) from 2001 to 2021, accessed from the Dataset of Terra Modis Mod11a2. Click for a larger picture.
The temperatures at airports were 2.5 ° C higher than surrounding areas, and the industrial zones were 2.8 ° C higher than surrounding areas. Areas with dense vegetation showed a remarkable cooling effect with a temperature difference of -3.7 ° C. The green rooms of the Mexico city are up to 12.1 ° C cooler than its urban core. The results show that the reduction in vegetation and the water correlates consistently with an increase in daytime temperatures.
Newly urbanized areas reflected the thermal effects of the replacement of natural surfaces with impermissible materials, which led to remarkable heating trends in these regions. In Tokyo and Saopaulo, despite the lack of spatial urban expansion (1.0% and 0.9%), both daily and night heaters (UHI) have increased in the past 20 years.
H/t to friends of science
Like this:
Load…
Related
Do you discover more from watts?
Subscribe to the latest posts to your e -mail.
Comments are closed.