SOUZA, B. S.; http://lattes.cnpq.br/1609608664991027; SOUZA, Bárbara Silva.
Abstract:
Changes in land use and cover 3 LUCCs, have the potential to cause significant changes
in the radiation and energy balances in the soil-plant-atmosphere system. Understanding
the transformations and consequences of LUCCs in components of the radiation balance
is essential to devise strategies that seek to mitigate the undesirable effects of the changes
caused by these changes. The present study aims to estimate the surface radiation balance
3 Rn, evaluate the impacts of atmospheric correction on surface temperature 3 Tsup,
longwave radiation emitted by the surface 3 Remi and instantaneous radiation balance 3
Rn, by different methods. For this, data developed on the Google Earth Engine (GEE)
platform was used in the Caatinga area, located in the sub-middle region of the São
Franscisco River, whose area is characterized by an intense expansion of irrigated
agriculture. It was also analyzed to analyze the changes in the patterns of the Tsup, Remi
and Rn radiation balance components with the LUCCs. For this purpose, images from the
OLI (Operational Land Image) and TIRS (Thermal Infrared Sensor) sensors on board the
Landsat 8 satellite were used for the period from January 2013 to December 2023.
Meteorological data from ECMWF's ERA5-Land were introduced to spatially
characterize the shortwave and longwave components incident on the study area. The
results obtained show that the use of Tsup without atmospheric correction results in
underestimates of this important component, by more than 5 °C, with significant impacts
on Remi and Rn.
