Climate change in Amazonia caused by soybean cropland expansion, as compared to caused by pastureland expansion
Climate change in Amazonia caused by soybean cropland expansion, as compared to caused by pastureland expansion
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DOI：
10.1029/2007gl029271
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发表时间：
2007-04-10
影响因子：
5.2
通讯作者：
Rocha, Edson J. P.
中科院分区：
文献类型：
--
作者：
Costa, Marcos H.;Yanagi, Silvia N. M.;Rocha, Edson J. P.
在过去的二十年里，牧场面积在前雨林地区的大幅增加引起了人们对土地覆盖变化可能引起的气候变化的担忧。然而，近年来，大豆农田的扩张在亚马逊地区的农业增长中越来越重要。本文利用CCM3气候模型研究了亚马逊地区大豆扩张引起的气候变化是否会与牧场扩张引起的气候变化有所不同。该模型的陆地部分已根据亚马逊地区大规模生物圈试验（LBA）和亚马逊地区大豆微气象试验的新发现进行了更新。结果表明，由于大豆的反照率非常高，大豆推广后的降水减少量明显高于牧场推广后的变化量。
In the last two decades, the strong increase of pasturelands over former rainforest areas has raised concerns about the climate change that such change in land cover might cause. In recent years, though, expansion of soybean croplands has been increasingly important in the agricultural growth in Amazonia. In this paper we use the climate model CCM3 to investigate whether the climate change due to soybean expansion in Amazonia would be any different from the one due to pastureland expansion. The land component of the model has been updated with new findings from the Large-Scale Biosphere Experiment in Amazonia (LBA), and a new soybean micrometeorological experiment in Amazonia. Results show that the decrease in precipitation after a soybean extension is significantly higher when compared to the change after a pastureland extension, a consequence of the very high albedo of the soybean.