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首页> 外文期刊>Journal of Hydrology >Climate change impacts on the water balance of coastal and montane rainforests in northern Queensland, Australia
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Climate change impacts on the water balance of coastal and montane rainforests in northern Queensland, Australia

机译:气候变化对澳大利亚昆士兰州北部沿海和山地雨林的水平衡产生影响

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摘要

How the water balance of coastal and montane rainforests in northern Queensland could change in response to climate change was examined using physically based models of interception and transpiration along with long term weather records. Future rainfall and temperature changes were based on the most recent climate modelling for the region and were assumed to fall within the range ±20% for rainfall with a temperature increase of 1-3. K. Climate change will affect the water balance of Australian rainforests primarily via rainfall changes rather than temperature. Any given change in rainfall produces a greater change in downstream runoff, the amplification ranging from 1.1 to 1.5 in the wet season to a factor of 12 in the dry season. Changes in wet season rainfall (80% of the annual total) dominate the total annual amount of water released for downstream flow, but dry season rainfall (20% of the annual total) changes are also very important as they affect onset and the duration of the period when there is no runoff. This period is currently ~110. days and this would change by ±30. days under the above climate scenarios. There are also potential in situ impacts of climate change that affect how long the rainforest canopy is wet, which may have important implications for the epiphytes and mosses that depend on these wet canopy conditions. Similarly there may be significant impacts on downstream freshwater species whose life cycles are adapted to the current dry season flow regime.
机译:使用基于物理的拦截和蒸腾模型以及长期天气记录,研究了昆士兰州北部沿海和山区雨林的水平衡如何响应气候变化而变化。未来的降雨量和温度变化是基于该地区最新的气候模型得出的,并假设温度升高1-3时,降雨量和温度的变化将落在±20%的范围内。 K.气候变化将主要通过降雨变化而非温度来影响澳大利亚雨林的水平衡。降雨的任何给定变化都会在下游径流中产生更大的变化,从雨季的1.1到1.5放大到旱季的12倍。湿季降雨量的变化(占年总量的80%)占全年向下游水释放​​的总量的主要部分,但旱季降雨量的变化(占年总量的20%)的变化也很重要,因为它们会影响降雨的开始和持续时间。没有径流的时期。目前这个时期是〜110。天,这将改变±30。上述气候情景下的工作日数。气候变化还有潜在的原地影响,影响雨林冠层湿润的时间,这可能对依赖于这些湿润冠层条件的附生植物和苔藓产生重要影响。同样,对生命周期适应当前干旱季节流域的下游淡水物种也可能产生重大影响。

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