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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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1981-2010年气候变化对青藏高原实际蒸散的影响
DOI: 10.11821/xb201211004, PP. 1471-1481
Keywords: 青藏高原,实际蒸散,潜在蒸散,动态植被模型,气候变化
Abstract:
基于1981-2010年青藏高原80个气象台站观测数据,通过改进的LPJ动态植被模型,模拟并分析了青藏高原实际蒸散及其与降水的平衡关系(P-E)的时空变化。研究结果表明,在过去三十年来青藏高原气候呈现以变暖为主要特征的背景下,降水量整体略有增加,潜在蒸散呈减少趋势,特别是2000年以前减少趋势显著;青藏高原大部分地区实际蒸散呈增加趋势,P-E的变化趋势呈西北增加—东南减少的空间格局。大气水分蒸散发能力降低理论上会导致实际蒸散减少,而青藏高原大部分地区实际蒸散增加,主要影响因素是降水增加,实际蒸散呈增加(减少)趋势的区域中86%(73%)的降水增加(减少)。
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