Construção de campos de temperatura da superfície de rios para inserção em modelos de mesoescala

Abstract

The present work aims to propose three methods for the construction of spatial fields of surface temperature of rivers (SRT), from remote and interdisciplinary information. situ, for insertion into mesoscale models. Remote information comes from of the AQUA and TERRA satellites that have irregular temporal frequency (01:30, 10:30 ,13:30 and 22:30 local time). In situ data, on the other hand, come from a station meteorological station, installed on the banks of the Rio Negro, with regular temporal frequency. To construct the TSR fields with a regular time frequency of 1/1h (method 1 and 2), remote and local information was combined using a weighting factor calculated as a function of the observed RRT diurnal cycle. The observed data allowed the increase in satellite data frequency and the construction of TSR fields in high temporal resolution (1/1h). One of the methods developed for creating fields of TSR, uses only information from satellites (method 3), targeting places where it is not there is in situ surface temperature information. Despite the limitations, the methods applied in the construction of the TSR fields were able to represent the characteristics of rivers and temperature behavior within the diurnal cycle. Although it presents limitations related to the temporal variation of temperature, method 2 was the method that produced TSR fields with behavior closer to the observations, both in in relation to the curve of the diurnal cycle in terms of temperature values.