LAS在西北干旱区荒漠均匀下垫面的观测研究

被引:12
作者
陈继伟 [1 ,2 ]
左洪超 [1 ]
王介民 [3 ]
王树金 [1 ]
陈伯龙 [1 ]
庄少伟 [1 ]
机构
[1] 兰州大学大气科学学院
[2] 部队
[3] 中国科学院寒区旱区环境与工程研究所
关键词
大孔径闪烁仪(LAS); 涡动相关法(EC); 区域感热通量; 稳定度普适函数;
D O I
暂无
中图分类号
P412.1 [地面气象观测];
学科分类号
摘要
利用"古浪非均匀近地层观测试验"的仪器平行对比观测部分试验数据,首先分析荒漠均匀下垫面大孔径闪烁仪(Large Aperture Scintillometer,LAS)光径线上等间距架设的4台涡动相关仪(EddyCovariance System,EC)观测的摩擦速度和感热通量的一致性。然后,基于4种不同下垫面建立稳定度普适函数分析,利用4台EC观测摩擦速度平均值,计算了LAS观测区域的感热通量,进而比较了LAS和EC两者观测值的差异。结果表明,4台EC观测的摩擦速度与感热通量一致性好,摩擦速度的差别<10%,感热通量的差别在10%左右。4种稳定度普适函数计算的LAS区域感热通量在白天、夜晚与EC观测平均值变化趋势一致,但计算值偏大;TAG(Thiermann and Grassl)稳定度普适函数计算值与EC观测平均值较接近。其主要原因除不同下垫面试验所得稳定度普适函数的差异外,Kipp&Zonen LAS所测感热通量的系统性偏高不可忽视。
引用
收藏
页码:56 / 64
页数:9
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