Abstract
Global warming-induced climate change evolved to be one of the most important research topics in Earth System Sciences, where remote sensing-based methods have shown great potential for detecting spatial temperature changes. This study utilized a time series of Landsat images to investigate the Land Surface Temperature (LST) of dry seasons between 1989 and 2019 in the Bac Binh district, Binh Thuan province, Vietnam. Our study aims to monitor LST change, and its relationship to land-cover change during the last 30 years. The results for the study area show that the share of Green Vegetation coverage has decreased rapidly for the dry season in recent years. The area covered by vegetation shrank between 1989 and 2019 by 29.44%. Our findings show that the LST increase and decrease trend is clearly related to the change of the main land-cover classes, namely Bare Land and Green Vegetation. For the same period, we find an average increase of absolute mean LST of 0.03 °C per year for over thirty years across all land-cover classes. For the dry season in 2005, the LST was extraordinarily high and the area with a LST exceeding 40 °C covered 64.10% of the total area. We expect that methodological approach and the findings can be applied to study change in LST, land-cover, and can contribute to climate change monitoring and forecasting of impacts in comparable regions.
Highlights
According to the Intergovernmental Panel on Climate Change (IPCC) 2018 “Special Report GlobalWarming of 1.5 ◦ C”, climate change is occurring at a faster rate in recent years [1]
Four land-cover types were derived for the Bac Binh study area, (1) Bare Land, (2) Green Vegetation, (3) Water Bodies and (4) Built-up Area
The results proved the suitability of monitoring Land Surface Temperature (LST) using Landsat multi-temporal satellite images
Summary
According to the Intergovernmental Panel on Climate Change (IPCC) 2018 “Special Report GlobalWarming of 1.5 ◦ C”, climate change is occurring at a faster rate in recent years [1]. Binh district is a region in Vietnam, which is undergoing urbanization processes, accompanied by increasing tourism and socio-economic development These trends come along with land-cover changes and land-use conflicts, resulting in a reduction of natural vegetation and the increase land used for infrastructure, settlement and industry, as well as agriculture and aquaculture. Along with urbanization, causes severe impacts in Vietnam, like the intensification and durations of floods and droughts. These heat-related changes put ecosystems under stress and affect the wellbeing of the local population with extreme heat events [2,3,4,5,6]
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