Remote sensing image time series analysis at a pixel level. The temperature trend in Friuli Venezia Giulia from a Landsat database (1987-2016)

This paper is a study on the temperature trend in Friuli-Venezia Giulia (North-East of Italy), based on a Landsat remote sensing image time series from 1987 to 2016. The thermal bands of the Landsat carried sensors were transformed into Celsius degrees. Each image was masked in order to exclude clouds and cloud shadow effects. A regression analysis was then carried out on the image time series. The result was a thematic map showing the distribution of the temperature trend in the study area. The built model showed a certain temperature increase trend (given by the values of the slope parameter of each built regression line), especially in the urban and suburban areas of the study area, plus in the Alpine region and in the North of the Marano lagoon area.