Ice Water Path-Optical Depth Relationships for Cirrus and Deep Stratiform Ice Cloud Layers.
Ice Water Path-Optical Depth Relationships for Cirrus and Deep Stratiform Ice Cloud Layers.
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卷云和深层状冰云层的冰水路径-光学深度关系。
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
B. Baum
中科院分区：
文献类型：
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作者：
A. Heymsfield;S. Matrosov;B. Baum
摘要通过对13个中纬度和6个热带冰云的拉格朗日螺旋下降和气球上升过程中收集的粒子大小分布和粒子形状信息的分析，研究了可见光波段云光学厚度与冰水路径的关系。虽然这一样本量很小，但远远大于早期研究中使用的样本数量，而且还有一个好处，即它包含了从云层顶部到底部的数据，平均几何厚度为3公里。此外，观察到的颗粒形状和习性信息直接用于研究，而不是假设习性是许多原始类型之一。这些观测结果适用于温度范围为−65° C至−20°C的中纬度云层，τ ε在0.5至7之间，估计的雷达反射率主要在−20至5 dBZe（频率为35 GHz）范围内，有些观测结果甚至延伸到−45 dBZe。热带…
Abstract Particle size distribution (PSD) and particle shape information collected during Lagrangian spiral descents and balloon ascents through 13 midlatitude and 6 tropical ice clouds are analyzed to investigate the relationship between cloud optical depth in visible wavelengths (τυ) and the ice water path (IWP). Although this sample size is small, it is far larger than the number of samples used in earlier studies and has the added benefit that it contains data from the top to the bottom of cloud layers, averaging 3 km in geometrical thickness. Furthermore, the observed particle shape and habit information are used directly in the investigation, rather than assuming that the habits are one of a number of pristine types. These observations apply to midlatitude clouds in the temperature range from −65° to −20°C, with τυ between 0.5 and 7, and estimated radar reflectivities primarily in the range from −20 to 5 dBZe (at a frequency of 35 GHz), with some observations extending down to −45 dBZe. The tropical...