A new ground-based optical instrument to measure snowflakes
A new ground-based optical instrument to measure snowflakes
复制标题
一种用于测量雪花的新型地面光学仪器
DOI：
10.1093/glycob/cwx068
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发表时间：
2001
期刊：
影响因子：
4.3
通讯作者：
E. Barthazy
中科院分区：
文献类型：
--
作者：
E. Barthazy
雪花的性质，如其大小分布，下降速度，轴比或其下降时的方向是很重要的模拟降水过程或解释返回的雷达功率，特别是偏振雷达。ETH的大气和气候科学研究所开发了一种用于测量水凝物的地基光学光谱仪。该仪器使用两个垂直方向略有偏移的光束工作。因此，每个粒子的两个图像被记录下来，除了用于计算其他属性之外，还可以用于计算雪花的准确下落速度。水凝物的尺寸范围在0.15毫米至76毫米之间，其中包括落入融化层内或接近融化层的非常大的雪花，而不会截断它们的图像。
The properties of snowflakes such as their size distribution, fall velocity, axial ratio or their orientation when falling are important in modelling precipitation processes or in interpreting returned radar power, especially of polarized radar. The Institute of Atmospheric and Climate Science at the ETH has developed a ground-based optical spectrometer for the measurement of hydrometeors. The instrument works with two light beams which are vertically slightly offset. Thus, two images are recorded of each particle which can be used to calculate, in addition to the other properties, the exact fall velocity of the snowflakes. Hydrometeors can be recorded in the size range of 0.15 mm to 76 mm which includes also the very large snowflakes falling within or close to the melting layer without truncating their image.