Energy Balance, CO<sub>2</sub> Balance, and Meteorological Aspects of Desertification Hotspots in Northeast Brazil
The main objective of this study was to evaluate meteorological variables and the simulated components of energy and CO<sub>2</sub> balances in desertification hotspots in Northeast Brazil. Meteorological data were obtained from the National Institute of Meteorology measurement network f...
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2021
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oai:doaj.org-article:e82c2050b5c542869ed2ab239646f3c42021-11-11T19:52:46ZEnergy Balance, CO<sub>2</sub> Balance, and Meteorological Aspects of Desertification Hotspots in Northeast Brazil10.3390/w132129622073-4441https://doaj.org/article/e82c2050b5c542869ed2ab239646f3c42021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/21/2962https://doaj.org/toc/2073-4441The main objective of this study was to evaluate meteorological variables and the simulated components of energy and CO<sub>2</sub> 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 CO<sub>2</sub> 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 m<sup>−</sup>² h<sup>−</sup>¹, and NEE fluctuated around approximately −5 g C m<sup>−</sup>² h<sup>−</sup>¹. These results indicate that rainfall seasonality is a crucial factor for the modulation of CO<sub>2</sub> and energy balance fluxes in the Caatinga biome.Any Caroline SilvaKeila Rêgo MendesCláudio Moisés Santos e SilvaDaniele Torres RodriguesGabriel Brito CostaDuany Thainara Corrêa da SilvaPedro Rodrigues MuttiRosaria Rodrigues FerreiraBergson Guedes BezerraMDPI AGarticlemicroclimateland degradationatmosphere–biosphere interactionmodelingHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 2962, p 2962 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
microclimate land degradation atmosphere–biosphere interaction modeling Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 |
| spellingShingle |
microclimate land degradation atmosphere–biosphere interaction modeling Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Any Caroline Silva 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 Bergson Guedes Bezerra Energy Balance, CO<sub>2</sub> Balance, and Meteorological Aspects of Desertification Hotspots in Northeast Brazil |
| description |
The main objective of this study was to evaluate meteorological variables and the simulated components of energy and CO<sub>2</sub> 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 CO<sub>2</sub> 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 m<sup>−</sup>² h<sup>−</sup>¹, and NEE fluctuated around approximately −5 g C m<sup>−</sup>² h<sup>−</sup>¹. These results indicate that rainfall seasonality is a crucial factor for the modulation of CO<sub>2</sub> and energy balance fluxes in the Caatinga biome. |
| format |
article |
| author |
Any Caroline Silva 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 Bergson Guedes Bezerra |
| author_facet |
Any Caroline Silva 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 Bergson Guedes Bezerra |
| author_sort |
Any Caroline Silva |
| title |
Energy Balance, CO<sub>2</sub> Balance, and Meteorological Aspects of Desertification Hotspots in Northeast Brazil |
| title_short |
Energy Balance, CO<sub>2</sub> Balance, and Meteorological Aspects of Desertification Hotspots in Northeast Brazil |
| title_full |
Energy Balance, CO<sub>2</sub> Balance, and Meteorological Aspects of Desertification Hotspots in Northeast Brazil |
| title_fullStr |
Energy Balance, CO<sub>2</sub> Balance, and Meteorological Aspects of Desertification Hotspots in Northeast Brazil |
| title_full_unstemmed |
Energy Balance, CO<sub>2</sub> Balance, and Meteorological Aspects of Desertification Hotspots in Northeast Brazil |
| title_sort |
energy balance, co<sub>2</sub> balance, and meteorological aspects of desertification hotspots in northeast brazil |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/e82c2050b5c542869ed2ab239646f3c4 |
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