THE IMPACT OF LAND COVER CHANGE ON NET RADIATION AND SOIL HEAT FLUX IN THE COASTAL TABLELANDS OF THE ALAGOAS STATE, BRAZIL
Abstract
The State of Alagoas dedicates 1o,95% of its area to the cultivation of sugar cane (Saccharums sp.). Soil heat flux (SHF) is a crucial component of net radiation (Rn), which also varies due to changes in vegetation cover. This experiment was carried out in an area of experimental sugar cane cultivation in the municipality of Rio Largo (09°28’03’’ S, 35°49’49’’ W) from November 2017 to November 2018. The aim was to characterize SHF and Rn under different degrees of soil vegetation cover in the Coastal Tablelands of the Alagoas state, Brazil. Net radiation components were measured using a Kipp and Zonen CNR1 net radiometer, whereas SHF was measured using three HFT-3 plates (REBS, Campbell Scientific Inc., USA), which were installed at a depth of 0.05 meters. The predominant atmospheric transmittance (Kt) classification was partly cloudy (54.70%). Precipitation, along with cloudiness, incident solar radiation, and land cover, influenced the seasonal cycle of net radiation (Rn) and soil heat flux (SHF). On average, the removal of vegetation cover had a negligible impact on Rn, whereas it led to a 437% increase in SHF during the day and a 240% increase during the night.
Downloads
Published
Issue
Section
License
Os autores mantém os direitos autorais e concedem à GEOGRAFIA o direito de primeira publicação, com os artigos simultaneamente licenciados sob a Creative Commons Attribution License, que permite o compartilhamento dos artigos com reconhecimento da autoria dos mesmos e publicação inicial nesta revista.
Geografia, Rio Claro, SP, Brasil - pISSN 0100-7912 - eISSN 1983-8700 está licenciada sob Licença Creative Commons