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Title: Rain retrieval from dual-frequency radar Doppler spectra: validation and potential for a midlatitude precipitating case-study

Journal Article · · Quarterly Journal of the Royal Meteorological Society
DOI: https://doi.org/10.1002/qj.3010 · OSTI ID:1376170
ORCiD logo [1]; ORCiD logo [2];  [3];  [4]
  1. Univ. of Leicester (United Kingdom). Dept. of Physics and Astronomy
  2. Univ. of Leicester (United Kingdom). Dept. of Physics and Astronomy; Univ. of Leicester (United Kingdom). Natural Environment Research Council (NERC), National Centre for Earth Observation (NCEO)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Atmospheric Sciences Division
  4. Stony Brook Univ., NY (United States). School of Marine and Atmospheric Sciences

A recently developed technique retrieving the binned raindrop size distributions (DSDs) and air state parameters from ground-based Ka and W-band radars Doppler spectra profiles is improved and applied to a typical midlatitude rain event. The retrievals are thoroughly validated against DSD observations of a 2D video disdrometer and independent X-band observations. Here for this case-study, profiles of rain rate, R, mean volume diameter and concentration parameter are retrieved, with low bias and standard deviations. In light rain (0.1 < R < 1 mm h-1), the radar reflectivities must be calibrated with a collocated disdrometer which introduces random errors due to sampling mismatch between the two instruments. The best performances are obtained in moderate rain (1 < R < 20 mm h-1) where the retrieval is providing self-consistent estimates of the absolute calibration and of the attenuation caused by antenna or radome wetness for both radars.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0012704
OSTI ID:
1376170
Report Number(s):
BNL--114145-2017-JA; KP1701000
Journal Information:
Quarterly Journal of the Royal Meteorological Society, Journal Name: Quarterly Journal of the Royal Meteorological Society Journal Issue: 704 Vol. 143; ISSN 0035-9009
Publisher:
Royal Meteorological SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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