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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Atmospheric versus vegetation controls of Amazonian tropical rain forest evapotranspiration: Are the wet and seasonally dry rain forests any different?
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Atmospheric versus vegetation controls of Amazonian tropical rain forest evapotranspiration: Are the wet and seasonally dry rain forests any different?

机译：亚马逊热带雨林蒸散量的大气控制与植被控制：潮湿和季节性干燥的雨林有什么不同吗？

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This study analyzes evapotranspiration data for three wet and two seasonally dry rain forest sites in Amazonia. The main environmental (net radiation, vapor pressure deficit, and aerodynamic conductance) and vegetation (surface conductance) controls of evapotranspiration are also assessed. Our research supports earlier studies that demonstrate that evapotranspiration in the dry season is higher than that in the wet season and that surface net radiation is the main controller of evapotranspiration in wet equatorial sites. However, our analyses also indicate that there are different factors controlling the seasonality of evapotranspiration in wet equatorial rain forest sites and southern seasonally dry rain forests. While the seasonality of evapotranspiration in wet equatorial forests is driven solely by environmental factors, in seasonally dry forests, it is also biotically controlled with the surface conductance varying between seasons by a factor of approximately 2. The identification of these different drivers of evapotranspiration is a major step forward in our understanding of the water dynamics of tropical forests and has significant implications for the future development of vegetation-atmosphere models and land use and conservation planning in the region.
机译：这项研究分析了亚马逊地区三个湿润和两个季节干燥的雨林站点的蒸散数据。还评估了蒸散的主要环境（净辐射，蒸气压赤字和空气动力学电导）和植被（表面电导）控制。我们的研究支持较早的研究，这些研究表明，旱季的蒸散量高于雨季的蒸散量，并且表面净辐射是赤道湿地蒸散量的主要控制者。然而，我们的分析还表明，有不同的因素控制着湿赤道雨林站点和南部季节性干燥雨林的蒸散量季节。虽然湿赤道森林的蒸散量季节仅由环境因素驱动，但在季节性干燥的森林中，它也受到生物控制，其季节之间的表面电导变化约2倍。我们对热带森林的水动力学的理解迈出了重要的一步，并且对该地区的植被-大气模型以及土地利用和保护规划的未来发展具有重要意义。

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