Deforestation changes land-atmosphere interactions across South American biomes

Salazar, Alvaro, Katzfey, Jack, Thatcher, Marcus, Syktus, Jozef, Wong, Kenneth and McAlpine, Clive (2016) Deforestation changes land-atmosphere interactions across South American biomes. Global and Planetary Change, 139 97-108. doi:10.1016/j.gloplacha.2016.01.004


Author Salazar, Alvaro
Katzfey, Jack
Thatcher, Marcus
Syktus, Jozef
Wong, Kenneth
McAlpine, Clive
Title Deforestation changes land-atmosphere interactions across South American biomes
Journal name Global and Planetary Change   Check publisher's open access policy
ISSN 0921-8181
1872-6364
Publication date 2016-04-01
Sub-type Article (original research)
DOI 10.1016/j.gloplacha.2016.01.004
Open Access Status Not yet assessed
Volume 139
Start page 97
End page 108
Total pages 12
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Subject 2306 Global and Planetary Change
1910 Oceanography
Abstract South American biomes are increasingly affected by land use/land cover change. However, the climatic impacts of this phenomenon are still not well understood. In this paper, we model vegetation-climate interactions with a focus on four main biomes distributed in four key regions: The Atlantic Forest, the Cerrado, the Dry Chaco, and the Chilean Matorral ecosystems. We applied a three member ensemble climate model simulation for the period 1981-2010 (30 years) at 25 km resolution over the focus regions to quantify the changes in the regional climate resulting from historical deforestation. The results of computed modelling experiments show significant changes in surface fluxes, temperature and moisture in all regions. For instance, simulated temperature changes were stronger in the Cerrado and the Chilean Matorral with an increase of between 0.7 and 1.4. °C. Changes in the hydrological cycle revealed high regional variability. The results showed consistent significant decreases in relative humidity and soil moisture, and increases in potential evapotranspiration across biomes, yet without conclusive changes in precipitation. These impacts were more significant during the dry season, which resulted to be drier and warmer after deforestation.
Formatted abstract
South American biomes are increasingly affected by land use/land cover change. However, the climatic impacts of this phenomenon are still not well understood. In this paper, we model vegetation–climate interactions with a focus on four main biomes distributed in four key regions: The Atlantic Forest, the Cerrado, the Dry Chaco, and the Chilean Matorral ecosystems. We applied a three member ensemble climate model simulation for the period 1981–2010 (30 years) at 25 km resolution over the focus regions to quantify the changes in the regional climate resulting from historical deforestation. The results of computed modelling experiments show significant changes in surface fluxes, temperature and moisture in all regions. For instance, simulated temperature changes were stronger in the Cerrado and the Chilean Matorral with an increase of between 0.7 and 1.4 °C. Changes in the hydrological cycle revealed high regional variability. The results showed consistent significant decreases in relative humidity and soil moisture, and increases in potential evapotranspiration across biomes, yet without conclusive changes in precipitation. These impacts were more significant during the dry season, which resulted to be drier and warmer after deforestation.
Keyword Atlantic Forest
Cerrado
Chilean Matorral
Climate
Deforestation
Dry Chaco
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Geography, Planning and Environmental Management Publications
Global Change Institute Publications
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