Volume 28, Issue 22 pp. 6807-6822
RESEARCH ARTICLE

Cerrado deforestation threatens regional climate and water availability for agriculture and ecosystems

Ariane A. Rodrigues

Corresponding Author

Ariane A. Rodrigues

Department of Ecology, University of Brasília, Brasília, Distrito Federal, Brazil

Correspondence

Ariane A. Rodrigues, Department of Ecology, University of Brasília, 70910-900 Brasília, Distrito Federal, Brazil.

Email: arianerodrigues@gmail.com

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Marcia N. Macedo

Marcia N. Macedo

Woodwell Climate Research Center, Falmouth, Massachusetts, USA

Amazon Environmental Research Institute, Brasília, Distrito Federal, Brazil

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Divino V. Silvério

Divino V. Silvério

Amazon Environmental Research Institute, Brasília, Distrito Federal, Brazil

Federal Rural University of the Amazon, Capitão Poço, Pará, Brazil

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Leandro Maracahipes

Leandro Maracahipes

Amazon Environmental Research Institute, Brasília, Distrito Federal, Brazil

Institute of Biology, State University of Campinas, Campinas, São Paulo, Brazil

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Michael T. Coe

Michael T. Coe

Woodwell Climate Research Center, Falmouth, Massachusetts, USA

Amazon Environmental Research Institute, Brasília, Distrito Federal, Brazil

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Paulo M. Brando

Paulo M. Brando

Woodwell Climate Research Center, Falmouth, Massachusetts, USA

Amazon Environmental Research Institute, Brasília, Distrito Federal, Brazil

Department of Earth System Science, University of California-Irvine, Irvine, California, USA

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Julia Z. Shimbo

Julia Z. Shimbo

Amazon Environmental Research Institute, Brasília, Distrito Federal, Brazil

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Raoni Rajão

Raoni Rajão

Department of Production Engineering, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil

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Britaldo Soares-Filho

Britaldo Soares-Filho

Center for Remote Sensing, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil

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Mercedes M. C. Bustamante

Mercedes M. C. Bustamante

Department of Ecology, University of Brasília, Brasília, Distrito Federal, Brazil

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First published: 08 September 2022

Abstract

The Brazilian Cerrado is one of the most biodiverse savannas in the world, yet 46% of its original cover has been cleared to make way for crops and pastures. These extensive land-use transitions (LUTs) are expected to influence regional climate by reducing evapotranspiration (ET), increasing land surface temperature (LST), and ultimately reducing precipitation. Here, we quantify the impacts of LUTs on ET and LST in the Cerrado by combining MODIS satellite data with annual land use and land cover maps from 2006 to 2019. We performed regression analyses to quantify the effects of six common LUTs on ET and LST across the entire gradient of Cerrado landscapes. Results indicate that clearing forests for cropland or pasture increased average LST by ~3.5°C and reduced mean annual ET by 44% and 39%, respectively. Transitions from woody savannas to cropland or pasture increased average LST by 1.9°C and reduced mean annual ET by 27% and 21%, respectively. Converting native grasslands to cropland or pasture increased average LST by 0.9 and 0.6°C, respectively. Conversely, grassland-to-pasture transitions increased mean annual ET by 15%. To date, land changes have caused a 10% reduction in water recycled to the atmosphere annually and a 0.9°C increase in average LST across the biome, compared to the historic baseline under native vegetation. Global climate changes from increased atmospheric greenhouse gas concentrations will only exacerbate these effects. Considering potential future scenarios, we found that abandoning deforestation control policies or allowing legal deforestation to continue (at least 28.4 Mha) would further reduce yearly ET (by −9% and −3%, respectively) and increase average LST (by +0.7 and +0.3°C, respectively) by 2050. In contrast, policies encouraging zero deforestation and restoration of the 5.2 Mha of illegally deforested areas would partially offset the warming and drying impacts of land-use change.

CONFLICT OF INTEREST

The authors declare that they have no conflict of interest.

DATA AVAILABILITY STATEMENT

The data supporting our findings came from published sources cited in the reference list. ET and LST data are openly available in the Google Earth Engine repository. The digital annual maps of land cover and land use are available in the MapBiomas platform at https://mapbiomas.org/. Data on environmental debts and surpluses used for scenarios modeling are available at https://csr.ufmg.br/radiografia_do_car/. High-resolution data on land use in riparian areas are available at http://geo.fbds.org.br/. Projections for 2012–2050 land-use changes were used under license for this study and are available upon reasonable request, with permission of the authors and publishers of the original study (Rochedo et al., 2018). Derived data from this study are available online in Dryad Digital Repository at https://doi.org/10.5061/dryad.4f4qrfjfx. Correspondence and requests for materials should be addressed to the corresponding author.

Volume28, Issue22

November 2022

Pages 6807-6822

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.