Table of Contents
International Journal of Atmospheric Sciences
Volume 2013 (2013), Article ID 326010, 9 pages
http://dx.doi.org/10.1155/2013/326010
Research Article

Temporal Patterns of Energy Balance for a Brazilian Tropical Savanna under Contrasting Seasonal Conditions

1Instituto de Física, Universidade Federal de Mato Grosso, 78060-900 Cuiabá-MT, Brazil
2Departamento de Agronomia e Medicina Veterinária, Universidade Federal de Mato Grosso, 78060-900 Cuiabá-MT, Brazil
3Department of Biological Sciences, California State University, San Marcos, San Diego, CA 92096, USA

Received 5 February 2013; Revised 3 June 2013; Accepted 10 June 2013

Academic Editor: Dimitris G. Kaskaoutis

Copyright © 2013 Thiago R. Rodrigues et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The savanna of Central Brazil (locally known as cerrado) has a long history of land cover change due to human activity. These changes have led to the degradation of cerrado forests and woodlands, leading to the expansion of grass-dominated cerrados and pastures. Thus, the aim of this study was to evaluate the temporal variation in energy flux in areas of degraded, grass-dominated cerrado (locally known as campo sujo) in Central Brazil. The amount of partitioned into H declined as monthly rainfall increased and reached a level of approximately 30% during the wet season, while the amount of partitioned into increased as monthly rainfall increased and reached a level of approximately 60% during the wet season. As a result, H was significantly higher than during the dry season, resulting in a Bowen ratio (β = H/) of 3-5, while Le was higher than H during the wet season, resulting in a . These data indicate that the energy partitioning of grass-dominated cerrado is relatively more sensitive to water availability than cerrado woodlands and forests, and have important implications for local and regional energy balance.