Proceedings ArticleDOI
Dependence of rain integral parameters on measured rain drop velocities at a tropical location
Thumree Sarkar,Soumyajyoti Jana,Animesh Maitra +2 more
- pp 1545-1548
TLDR
In this paper, a study using a LPM for several rain events spanning the monsoon season of 2013 at Kolkata, India, reflects the effect of velocity measurements on Z-R and A-R relationship for both convective and stratiform events.Abstract:
A study using a Laser Precipitation Monitor (LPM) for several rain events spanning the monsoon season of 2013 at Kolkata, India, reflects the effect of velocity measurements on Z-R and A-R relationship for both convective and stratiform events. Laser precipitation monitor measures ground based drop size distribution and drop velocity simultaneously. The presence of high velocity small drops (super-terminal) and low velocity large drops (sub-terminal) is abundantly experienced during different types of rain in the tropical region as observed by a Laser precipitation monitor (LPM). The number fraction of these drops is higher in convective rain than in stratiform rain. As the observed drop velocities show significant variation from the theoretically derived velocities, it is possible to get noticeable difference in rain rate calculations, Z-R and A-R relationships. The study involves a comparison of Z-R and A-R relations using both Gunn-Kinzer (GK) and actual observed velocity in convective and stratiform rain regimes separately as there was significant difference in number fraction of high velocity and low velocity rain drops in both the cases.read more
References
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Journal ArticleDOI
The terminal velocity of fall for water droplets in stagnant air
Ross Gunn,Gilbert D. Kinzer +1 more
TL;DR: In this article, the terminal velocities for distilled water droplets falling through stagnant air are accurately determined using a new method employing electronic techniques, and the over-all accuracy of the massterminal-velocity measurements is better than 0.7 per cent.
Journal ArticleDOI
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Frédéric Fabry,Isztar Zawadzki +1 more
TL;DR: In this paper, the authors analyzed 600 h of vertically pointing X-band radar data and 50 h of UHF boundary layer wind profiler data to characterize quantitatively the structure and the causes of the radar signature from melting precipitation.
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Do all raindrops fall at terminal speed
TL;DR: In this article, the authors show that many intermediate sized raindrops fall up to an order of magnitude faster than expected and that these super-terminal drops are differently sized fragments of a recent break-up, moving with the speed of the parent drop and relaxing towards vt(D).
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Investigation of vertical profile of rain microstructure at Ahmedabad in Indian tropical region
TL;DR: In this article, the microstructure of rain has been studied with observations using a vertical looking Micro Rain Radar (MRR) at Ahmedabad (23.06°N, 72.62°E), a tropical location in the Indian region.
Journal ArticleDOI
Drop Shapes and Fall Speeds in Rain: Two Contrasting Examples
TL;DR: In this article, two rain events are analyzed using two collocated 2D-video disdrometers (2DVD) and a C-band polarimetric radar at 15-km distance.