Time-series analyses of land surface temperature changes with Google Earth Engine in a mountainous region

• Tipo: Artigo em Revista Científica Internacional
• Data: 2023

Autores

de Almeida, CR (Autor) Outra; Garcia, N (Autor) Outra; Campos, JC (Autor) Outra; Alirio, J (Autor) Outra; Arenas-Castro, S (Autor) Outra; Goncalves, A (Autor) Outra; sillero, n (Autor) FCUP; Ana Teodoro (Autor) FCUP

Revista

Título: Heliyon

Vol. 9

ISSN: 2405-8440

Editora: Elsevier

Indexação

ISI Web of Knowledge - 6 Citações

Scopus - 11 Citações

Outras Informações

ID Authenticus: P-00Y-T4N

DOI: 10.1016/j.heliyon.2023.e18846

Abstract (EN): Studying changes in temperature is fundamental for understanding its interactions with the environment and biodiversity. However, studies in mountainous areas are few, due to their complex formation and the difficulty of obtaining local data. We analysed changes in temperature over time in Montesinho Natural Park (MNP) (Braganca, Portugal), an important conservation area due to its high level of biodiversity. Specifically, we aimed to analyse: i) whether temper-ature increased in MNP over time, ii) what environmental factors influence the Land Surface Temperature (LST), and iii) whether vegetation is related to changes in temperature. We used annual summer and winter mean data acquired from the Moderate-Resolution Imaging Spec-troradiometer (MODIS) datasets/products (e.g. LST, gathered at four different times: 11am, 1pm, 10pm and 2am, Enhance vegetation index -EVI, and Evapotranspiration -ET), available on the cloud-based platform Google Earth Engine between 2003 and 2021). We analysed the dynamics of the temporal trend patterns between the LST and local thermal data (from a weather station) by correlations; the trends in LST over time with the Mann-Kendall trend test; and the stability of hot spots and cold spots of LST with Local Statistics of Spatial Association (LISA) tests. The temporal trend patterns between LST and Air Temperature (Tair) data were very similar (& rho; > 0.7). The temperature in the MNP remained stable over time during summer but increased during winter nights. The biophysical indices were strongly correlated with the summer LST at 11am and 1pm. The LISA results identified hot and cold zones that remained stable over time. The remote-sensed data proved to be efficient in measuring changes in temperature over time.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 18