Can the Deforestation Breeze Change the Rainfall in Amazonia? A Case Study for the BR-163 Highway Region
Can the Deforestation Breeze Change the Rainfall in Amazonia? A Case Study for the BR-163 Highway Region
复制标题
森林砍伐微风会改变亚马逊流域的降雨量吗？
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
R. Rosolem
中科院分区：
文献类型：
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作者：
S. I. Saad;H. Rocha;M. Dias;R. Rosolem
摘要作者用巴西区域大气模拟系统（BRAMS）模式模拟了亚马逊河流域中尺度森林砍伐对边界层和降雨的影响。他们发现，森林砍伐的面积和形状（相对于风的影响）以及土壤水分状况在几周的时间尺度内对大气状态做出了贡献，温度，湿度和降雨量的模式可区分。砍伐森林导致了一个三维的热细胞的发展，所谓的砍伐森林的微风，稍微转移顺风大规模的流通。边界层是温暖和干燥的1000米以上的高度，并略有潮湿的2000米的高度。土壤湿度对循环能量的影响与土壤干燥度成正比（土壤湿度低于0.6）。森林砍伐的形状控制了对降雨的影响。沿盛行风方向排列的水平条带表现出明显的增雨作用，对降水的影响显著。
Abstract The authors simulated the effects of Amazonian mesoscale deforestation in the boundary layer and in rainfall with the Brazilian Regional Atmospheric Modeling System (BRAMS) model. They found that both the area and shape (with respect to wind incidence) of deforestation and the soil moisture status contributed to the state of the atmosphere during the time scale of several weeks, with distinguishable patterns of temperature, humidity, and rainfall. Deforestation resulted in the development of a three-dimensional thermal cell, the so-called deforestation breeze, slightly shifted downwind to large-scale circulation. The boundary layer was warmer and drier above 1000-m height and was slightly wetter up to 2000-m height. Soil wetness affected the circulation energetics proportionally to the soil dryness (for soil wetness below ∼0.6). The shape of the deforestation controlled the impact on rainfall. The horizontal strips lined up with the prevailing wind showed a dominant increase in rainfall, signific...