Affiliations: [a] Research Methodology, Department of Mathematics and Computer Science, Faculty of Science and Technology, Prince of Songkla University, Pattani Campus, Muang Pattani, 94000 Thailand | [b] Health Department, Faculty of Vocational Studies, Universitas Airlangga, Jl. Dharmawangsa Dalam Selatan No 68, Airlangga, Gubeng, Surabaya, East Java, Indonesia | [c] Statistics Department, Faculty of Mathematics and Science, Syiah Kuala University, Jl. Syech Abd. Rauf, Kopelma Darussalam, Banda Aceh, Aceh 23111, Indonesia
Abstract: Land surface temperature (LST) is one of the important factors in the physics of land surface processes to ensure the temperature change in the environment. Sumatra is one of the biggest islands in Indonesia that is suffering from deforestation. The objective of this study was to determine LST changes in Sumatra Island from 2000-2019. LST-day data for each region of Sumatra island were analyzed with cubic spline to see the seasonal pattern and get the LST changing value. The highest LST-day change was in the central region of Sumatra Island which was 0.3842 °C/decade (Z: 8.51, 95% CI: 0.296, 0.473). The lowest LST-day change was in the central north region of Sumatra Island which was –0.1574 °C/decade (Z: –3.022, 95% CI: –0.2596, –0.055). The overall LST-day change was 0.1621 °C/decade (Z: –3.022, 95% CI: –0.2596, –0.055).
Keywords: Land surface temperature, Sumatra, Climate change