Impacts of Instrument Limitations on Estimated Raindrop Size Distribution, Radar Parameters, and Model Microphysics during Mei-Yu Season in East China
Abstract
Instrumentation limitations on measured raindrop size distributions (DSDs) and their derived relations and physical parameters are studied through a comparison of the DSD measurements during mei-yu season in east China by four collocated instruments, that is, a two-dimensional video disdrometer (2DVD), a vertically pointing Micro Rain Radar (MRR), and two laser-optical OTT Particle Size Velocity (PARSIVEL) disdrometers (first generation: OTT-1; second generation: OTT-2). Among the four instruments, the 2DVD provides the most accurate DSD and drop velocity measurements, so its measured rainfall amount has the best agreement with the reference rain gauge. Other instruments tend to miss more small drops (D < 1 mm), leading to inaccurate DSDs and a lower rainfall amount. The low rainfall estimation becomes significant during heavy rainfall. The impacts of instrument limitations on the microphysical processes (e.g., evaporation and accretion rates) and convective storm morphology are evaluated. This is important especially for mei-yu precipitation, which is dominated by a high concentration of small drops. Furthermore, the instrument limitations need to be taken into account in both QPE and microphysics parameterization.
- Authors:
-
- Nanjing Univ., Nanjing (China); Xichang Satellite Launch Center, Xichang (China)
- Nanjing Univ., Nanjing (China); Chinese Academy of Meteorological Sciences, Beijing (China)
- Nanjing Univ., Nanjing (China); Univ. of Oklahoma, Norman, OK (United States)
- Nanjing Univ., Nanjing (China)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1524070
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Atmospheric and Oceanic Technology
- Additional Journal Information:
- Journal Volume: 34; Journal Issue: 5; Journal ID: ISSN 0739-0572
- Publisher:
- American Meteorological Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; Precipitation; Summer/warm season; Drop size distribution; Instrumentation/sensors; Remote sensing; Surface observations
Citation Formats
Wen, Long, Zhao, Kun, Zhang, Guifu, Liu, Su, and Chen, Gang. Impacts of Instrument Limitations on Estimated Raindrop Size Distribution, Radar Parameters, and Model Microphysics during Mei-Yu Season in East China. United States: N. p., 2017.
Web. doi:10.1175/JTECH-D-16-0225.1.
Wen, Long, Zhao, Kun, Zhang, Guifu, Liu, Su, & Chen, Gang. Impacts of Instrument Limitations on Estimated Raindrop Size Distribution, Radar Parameters, and Model Microphysics during Mei-Yu Season in East China. United States. https://doi.org/10.1175/JTECH-D-16-0225.1
Wen, Long, Zhao, Kun, Zhang, Guifu, Liu, Su, and Chen, Gang. Wed .
"Impacts of Instrument Limitations on Estimated Raindrop Size Distribution, Radar Parameters, and Model Microphysics during Mei-Yu Season in East China". United States. https://doi.org/10.1175/JTECH-D-16-0225.1. https://www.osti.gov/servlets/purl/1524070.
@article{osti_1524070,
title = {Impacts of Instrument Limitations on Estimated Raindrop Size Distribution, Radar Parameters, and Model Microphysics during Mei-Yu Season in East China},
author = {Wen, Long and Zhao, Kun and Zhang, Guifu and Liu, Su and Chen, Gang},
abstractNote = {Instrumentation limitations on measured raindrop size distributions (DSDs) and their derived relations and physical parameters are studied through a comparison of the DSD measurements during mei-yu season in east China by four collocated instruments, that is, a two-dimensional video disdrometer (2DVD), a vertically pointing Micro Rain Radar (MRR), and two laser-optical OTT Particle Size Velocity (PARSIVEL) disdrometers (first generation: OTT-1; second generation: OTT-2). Among the four instruments, the 2DVD provides the most accurate DSD and drop velocity measurements, so its measured rainfall amount has the best agreement with the reference rain gauge. Other instruments tend to miss more small drops (D < 1 mm), leading to inaccurate DSDs and a lower rainfall amount. The low rainfall estimation becomes significant during heavy rainfall. The impacts of instrument limitations on the microphysical processes (e.g., evaporation and accretion rates) and convective storm morphology are evaluated. This is important especially for mei-yu precipitation, which is dominated by a high concentration of small drops. Furthermore, the instrument limitations need to be taken into account in both QPE and microphysics parameterization.},
doi = {10.1175/JTECH-D-16-0225.1},
journal = {Journal of Atmospheric and Oceanic Technology},
number = 5,
volume = 34,
place = {United States},
year = {Wed May 03 00:00:00 EDT 2017},
month = {Wed May 03 00:00:00 EDT 2017}
}
Web of Science
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