Collaborative Research: The Meteorological Variability of the Two Dimensional/Temporal Structures of Drop Size Distributions and Rain

合作研究：雨滴尺寸分布和降雨的二维/时间结构的气象变化

• 批准号: 1532977
• 负责人: Michael Larsen
• 金额: $ 34.59万
• 依托单位: College of Charleston
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-10-01 至 2020-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1532977&HistoricalAwards=false
• 关键词: Collaborative; Research; Meteorological; Variability; Two

This award provides funding for researchers to study the topic of raindrop clustering. As can be seen in nature, rain does not fall with equal spacing between the individual drops. Rather, the raindrops tend to cluster or bunch. This can make the interpretation of tools used to measure rainfall, such as simple rain gauges or advanced weather radar, more complicated. In this study, researchers from two institutions will expand a measuring site that includes a significant number of disdrometers, which are instruments that can provide images and information about individual raindrops as they fall. The additional data will help the researchers answer a variety of questions which are ultimately relevant to the interpretation of data from radar and the effect of rain on soil erosion. Undergraduate students would be directly involved in the collection and analysis of the data, providing opportunities for the next generation of scientists. The research team will continue and expand upon their work making measurements of small scale variability in rainfall. In their prior research grant, the researchers set up an array of optical disdrometers and a video disdrometer within a small 100m x 100m area. This award will add a second video disdrometer and a newer type of optical disdrometer in order to collect data that would answer questions raised by the investigation of the original data. Specifically, the research plan is to: (1) expand the library of data to obtain better and more complete sets of observations in a wider variety of meteorological conditions, (2) achieve higher temporal resolution of some instruments to reduce advection smoothing, particularly for more detailed studies of the spatial pair correlation function, (3) characterize further the spatial correlation function for many more rain events beyond the current 100m, (4) focus on centimeter scale studies using 2DVD data yet to be explored with particular regard to scales relevant to radar Bragg scatter, (5) expand the study of the effect of domain size on drop size distribution and their integrated parameters to include more data sets under different meteorological conditions, (6) focus on calculating 2D spatial correlation in different meteorological settings and different temporal resolutions with the aim of developing useful parametric expressions for applications, and (7) combine 2DVD observations from two instruments for unique simultaneity studies similar to historic and prize winning photon work.

该奖项为研究人员研究雨滴聚集的主题提供资金。 正如在自然界中可以看到的那样，雨不会以每个水滴之间的相等间距落下。 相反，雨滴倾向于聚集或聚集。 这可能会使用于测量降雨量的工具（如简单的雨量计或先进的天气雷达）的解释更加复杂。 在这项研究中，来自两个机构的研究人员将扩大一个测量站点，其中包括大量的disdrometers，这些仪器可以提供有关单个雨滴的图像和信息。 额外的数据将帮助研究人员回答各种问题，这些问题最终与雷达数据的解释和降雨对土壤侵蚀的影响有关。 本科生将直接参与数据的收集和分析，为下一代科学家提供机会。 研究小组将继续并扩大他们的工作，测量降雨的小尺度变化。 在他们之前的研究经费中，研究人员在一个100米x 100米的小区域内设置了一个光学disdrometers阵列和一个视频disdrometer。 该合同将增加第二台视频转速计和一种新型的光学转速计，以收集数据，回答原始数据调查中提出的问题。 具体而言，研究计划是：（1）扩大数据库，以便在更广泛的气象条件下获得更好和更完整的观测数据集，（2）提高某些仪器的时间分辨率，以减少平流平滑，特别是对空间对相关函数进行更详细的研究，（3）进一步表征当前100米以外更多降雨事件的空间相关函数，（4）利用2DVD数据进行厘米尺度研究，特别是与雷达布拉格散射相关的尺度，（5）扩展区域大小对液滴粒径分布及其综合参数影响的研究，以包括不同气象条件下的更多数据集，（6）专注于计算不同气象设置和不同时间分辨率下的二维空间相关性，旨在开发有用的参数表达式用于应用，和（7）结合联合收割机从两台仪器的2DVD观测，进行类似于历史和获奖光子工作的独特的非对称性研究。

项目成果

Holographic Observations of Centimeter-Scale Nonuniformities within Marine Stratocumulus Clouds

海洋层积云内厘米级不均匀性的全息观测

• DOI: 10.1175/jas-d-19-0164.1
• 发表时间: 2020
• 期刊: Journal of the Atmospheric Sciences
• 影响因子: 3.1
• 作者: Glienke, Susanne;Kostinski, Alexander B.;Shaw, Raymond A.;Larsen, Michael L.;Fugal, Jacob P.;Schlenczek, Oliver;Borrmann, Stephan
• 通讯作者: Borrmann, Stephan

Refinements to Data Acquired by 2-Dimensional Video Disdrometers

对二维视频测距仪采集的数据进行改进

• DOI: 10.3390/atmos11080855
• 发表时间: 2020
• 期刊: Atmosphere
• 影响因子: 2.9
• 作者: Larsen, Michael L.;Blouin, Christopher K.
• 通讯作者: Blouin, Christopher K.

Light scattering in a spatially-correlated particle field: Role of the radial distribution function

空间相关粒子场中的光散射：径向分布函数的作用

• DOI: 10.1016/j.jqsrt.2019.106601
• 发表时间: 2019
• 期刊: Journal of Quantitative Spectroscopy and Radiative Transfer
• 影响因子: 2.3
• 作者: Packard, Corey D.;Larsen, Michael L.;Cantrell, Will H.;Shaw, Raymond A.
• 通讯作者: Shaw, Raymond A.

Preliminary Statistical Characterizations of the Lowest Kilometer Time–Height Profiles of Rainfall Rate Using a Vertically Pointing Radar

使用垂直指向雷达对最低公里时间降雨率高度剖面的初步统计特征

• DOI: 10.3390/atmos13040635
• 发表时间: 2022
• 期刊: Atmosphere
• 影响因子: 2.9
• 作者: Jameson, Arthur R.;Larsen, Michael L.
• 通讯作者: Larsen, Michael L.

Light Scattering in a Turbulent Cloud: Simulations to Explore Cloud-Chamber Experiments

湍流云中的光散射：模拟探索云室实验

• DOI: 10.3390/atmos11080837
• 发表时间: 2020
• 期刊: Atmosphere
• 影响因子: 2.9
• 作者: Packard, Corey D.;Larsen, Michael L.;Thomas, Subin;Cantrell, Will H.;Shaw, Raymond A.
• 通讯作者: Shaw, Raymond A.