Mass and density of individual frozen hydrometeors
Mass and density of individual frozen hydrometeors
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DOI：
10.5194/acp-21-14235-2021
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发表时间：
2021-09
影响因子：
6.3
通讯作者：
K. Rees;D. Singh;E. Pardyjak;T. Garrett
中科院分区：
文献类型：
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作者：
K. Rees;D. Singh;E. Pardyjak;T. Garrett
抽象的。一种新的降水传感器，差分Ehrman成像Disdrometer（DEID），用于提供质量，直径和密度的单个水凝物的第一个连续测量。DEID由一个指向加热铝板的红外摄像机组成。它利用水和金属的对比热发射率来确定单个颗粒的质量，假设在蒸发过程中从板到颗粒的热传递过程中能量守恒。颗粒密度由颗粒质量和形态的组合确定。在DEID旁边部署了多角度雪花相机（MASC），以提供颗粒大小和形状的精细图像。广泛的一致性之间的质量-直径和密度-直径的关系，在以前的研究中获得的。然而，DEID测量结果显示，一般较弱的依赖性与大小水凝密度和较强的依赖性，总雪花质量。
Abstract. A new precipitation sensor, the Differential Emissivity Imaging Disdrometer (DEID), is used to provide the first continuous measurements of the mass, diameter, and density of individual hydrometeors. The DEID consists of an infrared camera pointed at a heated aluminum plate. It exploits the contrasting thermal emissivity of water and metal to determine individual particle mass by assuming that energy is conserved during the transfer of heat from the plate to the particle during evaporation. Particle density is determined from a combination of particle mass and morphology. A Multi-Angle Snowflake Camera (MASC) was deployed alongside the DEID to provide refined imagery of particle size and shape. Broad consistency is found between derived mass–diameter and density–diameter relationships and those obtained in prior studies. However, DEID measurements show a generally weaker dependence with size for hydrometeor density and a stronger dependence for aggregate snowflake mass.