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Article

Energy Balance, CO2 Balance, and Meteorological Aspects of Desertification Hotspots in Northeast Brazil

1
Department of Atmospheric and Climate Sciences, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil
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Department of Statistic, Federal University of Piauí, Teresina 64049-550, PI, Brazil
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Institute of Biodiversity and Forests, Federal University of Western Pará, Santarém 68035-110, PA, Brazil
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Institute of Engineering and Geosciences, Federal University of Western Pará, Santarém 68035-110, PA, Brazil
*
Author to whom correspondence should be addressed.
Academic Editor: Luis Garrote
Water 2021, 13(21), 2962; https://doi.org/10.3390/w13212962
Received: 31 August 2021 / Revised: 9 October 2021 / Accepted: 12 October 2021 / Published: 20 October 2021
(This article belongs to the Section Water and Climate Change)
The main objective of this study was to evaluate meteorological variables and the simulated components of energy and CO2 balances in desertification hotspots in Northeast Brazil. Meteorological data were obtained from the National Institute of Meteorology measurement network for the Cabrobó and Ibimirim sites. Initially, hourly linear trends were calculated for the meteorological variables using the non-parametric Mann–Kendall test. Then, the seasonal variability in the components of energy and CO2 balances was assessed through simulations of the simple tropical ecosystem (SITE) model. Results showed evidence of increasing air temperature trends in the Cabrobó site in the first months of the year, which was not observed in the Ibimirim site. Regarding relative humidity, increasing trends were observed in a few months over the Cabrobó site, while decreasing trends were observed in the Ibimirim site. Opposite behaviors were also identified for the trends in wind speed in both sites. Gross primary production (GPP) and net ecosystem exchange (NEE) simulated values were higher in the first half of the year in both sites. GPP varied from 0.8 to 1.2 g C m² h¹, and NEE fluctuated around approximately −5 g C m² h¹. These results indicate that rainfall seasonality is a crucial factor for the modulation of CO2 and energy balance fluxes in the Caatinga biome. View Full-Text
Keywords: microclimate; land degradation; atmosphere–biosphere interaction; modeling microclimate; land degradation; atmosphere–biosphere interaction; modeling
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MDPI and ACS Style

Silva, A.C.; Rêgo Mendes, K.; Santos e Silva, C.M.; Torres Rodrigues, D.; Brito Costa, G.; Thainara Corrêa da Silva, D.; Rodrigues Mutti, P.; Rodrigues Ferreira, R.; Guedes Bezerra, B. Energy Balance, CO2 Balance, and Meteorological Aspects of Desertification Hotspots in Northeast Brazil. Water 2021, 13, 2962. https://doi.org/10.3390/w13212962

AMA Style

Silva AC, Rêgo Mendes K, Santos e Silva CM, Torres Rodrigues D, Brito Costa G, Thainara Corrêa da Silva D, Rodrigues Mutti P, Rodrigues Ferreira R, Guedes Bezerra B. Energy Balance, CO2 Balance, and Meteorological Aspects of Desertification Hotspots in Northeast Brazil. Water. 2021; 13(21):2962. https://doi.org/10.3390/w13212962

Chicago/Turabian Style

Silva, Any Caroline, Keila Rêgo Mendes, Cláudio Moisés Santos e Silva, Daniele Torres Rodrigues, Gabriel Brito Costa, Duany Thainara Corrêa da Silva, Pedro Rodrigues Mutti, Rosaria Rodrigues Ferreira, and Bergson Guedes Bezerra. 2021. "Energy Balance, CO2 Balance, and Meteorological Aspects of Desertification Hotspots in Northeast Brazil" Water 13, no. 21: 2962. https://doi.org/10.3390/w13212962

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