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冰川冻土  2013 

青藏高原北麓河地区降水量观测与对比分析

DOI: 10.7522/j.issn.1000-0240.2013.0004, PP. 30-39

Keywords: 青藏高原,Thies激光雨滴谱仪,降水量对比

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Abstract:

根据2011年11月至2012年9月通过Thies激光雨滴谱仪、T-200B雨雪量计和TE525翻斗式雨量筒获取的青藏高原北麓河地区降水量数据,按3个时间段分别对3种仪器记录的降水量行了对比分析.结果表明激光雨滴谱仪获取的固态降水量与经Jimmy校正公式修正后的T-200B降水量极为接近.但在测量雨夹雪时,激光雨滴谱仪对降水类型、颗粒直径的误判造成了获取的降水量远高于T-200B雨量筒.而3种仪器获取的液态降水量有很好的一致性.但是,当小时降雨量在2mm以上时,激光雨滴谱仪获取的降雨量比T-200B和TE525雨量筒小20%左右.同时,在风吹雪对激光雨滴谱仪的影响方面做了相关的分析研究,初步认为风吹雪的颗粒直径主要集中在0.5mm以下.

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