Abstract
The surface albedo controls the energy balance between the surface and the atmosphere, being a primordial variable to identify climatic variations. The objective of this study was to evaluate the changes of the surface albedo in different Land Use and Land Cover in the Atlantic Forest biome from images TM/Landsat 5 and OLI/Landsat 8, verifying its variation in 30 years. The images used were path-row 221-080, which covered the Floresta Nacional de São Francisco de Paula on the dates of 1987 and 2017. The albedo was obtained by the method of the Surface Energy Balance Algorithm for Land, while the mapping of Land Use and Land Cover was performed by the Bhattacharyya algorithm, identifying four thematic classes. Finally, the albedo was crossed with the thematic classes, evidencing their variation in function of the changes in the land cover. The surface albedo ranged from 6 to 22%, but the year 1987 concentrated albedo values higher than in 2017. The native forest presented superior albedo to the Forest Plantations in both dates due to the structure of the canopy of this class. The spatial analysis of the albedo exposes the relation of this climatic variable to the cover of the terrestrial surface. Thus changes in the vegetation cover cause alterations in the albedo, influencing changes in the radiation and atmospheric fluxes.
Highlights
The replacement of native forest cover in alternative land uses led to a growing interest in the climate effects resulting from this conversion
According to the spatial analysis of the surface albedo presented by the FLONA of São Francisco de Paula, it was verified that in 1987 the values expressed for this variable were higher when compared to the values identified in 2017, since the presence of higher albedo classes at the beginning of the monitoring
It should be noted that albedo classes 9 and 10 in 1987 represented 4.65% of the total area, while in 2017 these classes included only 0.25% of the area, confirming the behavior observed in the qualitative analysis of FLONA, to reduce the extreme values of albedo in 2017
Summary
The replacement of native forest cover in alternative land uses led to a growing interest in the climate effects resulting from this conversion. This process has led to the development of studies that more accurately describe the interaction mechanisms of vegetation with the atmosphere fluxes. The albedo is an important parameter to evaluate the relation of forests to the balance of atmospheric energy. The changes in albedo modify the radiation and energy balance of the surface, which can be detected with its monitoring (SILVA et al, 2016)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
