Synergistic Studies of Raindrop Shapes, Oscillations and Orientations Using 2D-Video Disdrometer, Advanced Radar and Wind Tunnel
使用 2D 视频测距仪、先进雷达和风洞对雨滴形状、振荡和方向进行协同研究
基本信息
- 批准号:0924622
- 负责人:
- 金额:$ 45.08万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2009
- 资助国家:美国
- 起止时间:2009-10-01 至 2013-09-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This research addresses a number of key science questions related to rain microstructure defined herein as the size, shape and orientation distributions of raindrops in a wide range of rain types and climatologies. Whilst great progress has been made in the understanding of drop size distribution variability, and there has been modest success in the use of "bulk" assumptions on mean drop shapes and orientation distributions, there are still variations in the raindrop shape distribution parameters and oscillation modes that are not fully understood. There are even fewer observations of the variability of the drop canting angle distribution. Knowledge of these rain microstructure characteristics is key to developing accurate polarimetric radar-based drop-size distribution and rain rate retrievals, and for electromagnetic wave attenuation-correction algorithms.This research is observationally-driven and makes use of multiple 2D-video disdrometers in different locations (Huntsville, AL and Brisbane, AU) and advanced radars including the dual-polarized ARMOR radar in Huntsville, AL; the dual-wavelength/dual-polarized CP2 radar in Brisbane, and the dual-polarized CSU-CHILL radar near Greeley, CO. The world class vertical wind tunnel facility at the Johannes Gutenberg-Universität in Mainz, Germany will be used for specialized observation of the time varying shapes and oscillation modes of freely "floating" drops, as well as an investigation into the time varying shapes of moderate-to-large drops after coalescing collisions with sub-millimetric sized drops.The broader impacts of the study are: (a) better use of new observing capability resulting from the imminent polarimetric upgrade of the National Weather Service operational weather radar network and "gap-filler" X band radars for short range hydrological applications; (b) incorporation of new results to improve radar displays used by many TV stations in the US that are planning to upgrade their C-band systems to dual-polarization to improve severe weather forecasting, and (c) use of results on drop shapes and orientations by the national and international radiowave propagation community.
本研究解决了许多与雨微观结构相关的关键科学问题,在此定义为在广泛的降雨类型和气候学中雨滴的大小,形状和方向分布。虽然在理解雨滴大小分布的可变性方面取得了很大的进展,并且在使用平均雨滴形状和方向分布的“体积”假设方面取得了一定的成功,但雨滴形状分布参数和振荡模式的变化仍未完全理解。关于落点倾斜角分布的可变性的观测就更少了。了解这些雨的微观结构特征是开发精确的基于极化雷达的雨滴大小分布和雨率检索以及电磁波衰减校正算法的关键。这项研究是由观测驱动的,利用了不同地点(美国亨茨维尔和澳大利亚布里斯班)的多个2d视频测距仪和先进的雷达,包括美国亨茨维尔的双偏振ARMOR雷达;位于布里斯班的双波长/双偏振CP2雷达和位于CO. Greeley附近的双偏振CSU-CHILL雷达。位于德国美因茨的Johannes Gutenberg-Universität的世界级垂直风洞设施将用于专门观察自由“浮动”液滴的时变形状和振荡模式,以及研究与亚毫米大小的液滴合并碰撞后中大型液滴的时变形状。该研究的更广泛影响是:(a)更好地利用新的观测能力,这是由于国家气象局业务气象雷达网络即将进行偏振升级,以及用于短距离水文应用的“空白填充”X波段雷达;(b)纳入新的结果,以改善美国许多电视台所使用的雷达显示,这些电视台正计划将其c波段系统升级为双极化,以改善恶劣天气预报;以及(c)国内和国际无线电波传播界使用关于水滴形状和方向的结果。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Viswanathan Bringi其他文献
Aspects of Rain Drop Size Distribution Characteristics from Measurements in Two Mid-Latitude Coastal Locations
两个中纬度沿海地点的雨滴尺寸分布特征的测量
- DOI:
- 发表时间:
2023 - 期刊:
- 影响因子:0
- 作者:
M. Thurai;Viswanathan Bringi;David Wolff;C. Pabla;GyuWon Lee;Wonbae Bang - 通讯作者:
Wonbae Bang
Viswanathan Bringi的其他文献
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{{ truncateString('Viswanathan Bringi', 18)}}的其他基金
Collaborative Research: Observational and Numerical Modeling Studies of Rain Microphysics
合作研究:雨微物理的观测和数值模拟研究
- 批准号:
1901585 - 财政年份:2019
- 资助金额:
$ 45.08万 - 项目类别:
Standard Grant
Advanced Comprehensive Analysis of Rain Drop Shapes, Oscillation Modes, and Fall Velocities Using High-Resolution Surface Disdrometers, Polarimetric Radar, and Numerical Models
使用高分辨率表面测距仪、偏振雷达和数值模型对雨滴形状、振荡模式和降落速度进行高级综合分析
- 批准号:
1431127 - 财政年份:2015
- 资助金额:
$ 45.08万 - 项目类别:
Continuing Grant
Field Studies of Raindrop Axis Ratio Distributions Using an Improved 2D-Video Disdrometer and Dual-Polarized Radar
使用改进的二维视频测距仪和双偏振雷达对雨滴轴比分布进行现场研究
- 批准号:
0603720 - 财政年份:2006
- 资助金额:
$ 45.08万 - 项目类别:
Continuing Grant
Development of a High Performance Offset Gregorian Antenna for the Colorado State University (CSU)-CHILL National Radar Facility
为科罗拉多州立大学 (CSU)-CHILL 国家雷达设施开发高性能偏置格里高利天线
- 批准号:
0216192 - 财政年份:2002
- 资助金额:
$ 45.08万 - 项目类别:
Standard Grant
Field Studies of Raindrop Axis Ratio and Orientation Distributions Using an Improved 2D-Video Disdrometer and Dual-Polarized Radar
使用改进的二维视频测距仪和双偏振雷达对雨滴轴比和方向分布进行现场研究
- 批准号:
0140350 - 财政年份:2002
- 资助金额:
$ 45.08万 - 项目类别:
Continuing Grant
Advanced Hydrometeor Identification of Severe Storms During STEPS
STEPS 期间严重风暴的高级水凝物识别
- 批准号:
9982030 - 财政年份:2000
- 资助金额:
$ 45.08万 - 项目类别:
Continuing Grant
Coordinated Analysis of Fully Polarimetric CSU-CHILL Radar Signatures with Surface and Airborne Hydrometeor Images
全偏振 CSU-CHILL 雷达特征与地面和机载水凝物图像的协调分析
- 批准号:
9730231 - 财政年份:1998
- 资助金额:
$ 45.08万 - 项目类别:
Continuing Grant
Multiparameter Radar and Aircraft-Based Studies of the Microphysical, Kinematic and Electrical Structure of Convective Clouds During CaPE
CaPE 期间对流云的微物理、运动学和电学结构的多参数雷达和基于飞机的研究
- 批准号:
9410698 - 财政年份:1995
- 资助金额:
$ 45.08万 - 项目类别:
Continuing Grant
Indo-U.S. Workshop on Atmospheric Technology, Bangalore, India, March 1994, Group Travel Award in Indian and U.S. Currencies
印度-美国
- 批准号:
9311818 - 财政年份:1994
- 资助金额:
$ 45.08万 - 项目类别:
Standard Grant
C-Band Polarimetric Radar Studies During CLEOPATRA
CLEOPATRA 期间的 C 波段偏振雷达研究
- 批准号:
9214864 - 财政年份:1992
- 资助金额:
$ 45.08万 - 项目类别:
Continuing Grant
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