Impacto do desmatamento de uma área de mangue no albedo superficial

Abstract

Mangroves are peculiar ecosystem and it is found at tropical regions. The degradation of mangroves changes the surface radiation balance, consequently, the albedo. To evaluate and compare albedo data two micrometeorological steal towers was installed in the Marechal Deodoro city, Alagoas, Brazil from October 2004 to October 2005. On the native mangrove tower (9° 42' 18"S; 35o 48' 32" W) two pyranometers were fixed above the canopy to collected incident and reflected solar radiation, and in October 2005, a third pyranometer was installed inside of the mangrove area. On the deforested area (9° 36' 38" S; 35° 46' 03" W) radiation sensors were installed at a higher 2m above the surface. The results had shown that in average the albedo above mangrove forest is 5% higher than over others kind of tropical forest, as an example, Amazonian rain forest. The maximum registered internal albedo was 13% and it was reached when canopy albedo was at lowest ≈ 20%, evidencing the tilde influence. Moreover, at the deforested area albedo was, in average 35%, which implies an increase of 49 % when the natural area is deforested.