Seasonal Analysis of Biophysical Parameters using the MODIS Sensor for the State OF Alagoas

Abstract

The monitoring of the biophysical parameters of a given region is of paramount importance for its population, in view of the impacts caused by large-scale climatic factors and the seasonality of the meteorological systems that affect the region. Therefore, the objective of the study is analyzing the seasonality of the biophysical parameters Index of Vegetation by Normalized Difference (IVDN) and Land surface temperature (LST) as well, TST interaction with rainfall in the State of Alagoas for the years 2001 and 2016 rises under the influence of La Niña. IVDN and TST product TST from the MODIS sensor, TERRA satellite, were processed using the Qgis 2.18.3 software. Initially, calculations were performed with the adjustment factors in the IVDN and TST images, and later the thematic maps were prepared for the analyzes. The result TST obtained show an increase in the last quarter of 2016 in the classes of thin vegetation and exposed soil and a decrease in dense vegetation compared to 2001, in the other classes there is a seasonal variability of the vegetation cover. TST maps have direct influence with IVDN, showing an inversely proportional relationship between the parameters. In precipitation, TST direct influence on the response of IVDN and TST was verified, due to the type of vegetation found in the region.

Keywords:
remote sensing; meteorological systems; vegetation indexes