TR32-Database: Database of Transregio 32

[1163] - Use of Specific Attenuation for Rainfall Measurement at X-Band Radar Wavelengths. Part 2: Rainfall Estimates and Comparison with Rain Gauges

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Features
Citation
Diederich, M., Ryzhkov, A., Simmer, C., Zhang, P., Troemel, S., 2015. Use of Specific Attenuation for Rainfall Measurement at X-Band Radar Wavelengths. Part 2: Rainfall Estimates and Comparison with Rain Gauges. Journal of Hydrometeorology, 16 (2), 503 - 516. DOI: 10.1175/JHM-D-14-0067.1.
Identification
Title(s):Main Title: Use of Specific Attenuation for Rainfall Measurement at X-Band Radar Wavelengths. Part 2: Rainfall Estimates and Comparison with Rain Gauges
Description(s):Abstract: In a series of two papers, rain rate retrievals based on specific attenuation at radar X-band wave length using the R(A) method presented by Ryzhkov et al. (2014) are thoroughly investigated. We use continuous time series of overlapping measurements from two polarimetric X-band weather radars in Germany during summer of 2011-2013 to analyze various aspects of the method, like miscalibration correction, ground clutter contamination, partial beam blockage (PBB), sensitivity to precipitation characteristics, and sensitivity to temperature assumptions in the retrievals. In part I of the series, we use the relations inherent to the R(A) method to calculate radar reflectivity Z from specific attenuation, and compare it with measured reflectivity to estimate PBB and calibration errors for both radars. In this second paper, R(A) rain estimates are compared to R(Z) and R(KDP)-based retrievals. PBB and calibration corrections derived in Part I made the R(Z) rainfall estimates almost perfectly consistent. Accumulated over 5 summer months, rainfall maps showed strong effects of clutter contamination if R(KDP) is used, and weaker impact on R(A). These effects could be reduced by processing the phase shift measurements with more resilience towards ground clutter contamination, and by substituting problematic R(KDP) or R(A) estimates with R(Z). Hourly and daily accumulations from rain estimators are compared with rain gauge measurements; the results show that R(A) complemented by R(Z) in segments with low total differential phase shift correlates best with gauges and has the lowest bias and RMSE, followed by R(KDP) substituted with R(Z) at rain rates below 8 mm/h.
Identifier(s):DOI: 10.1175/JHM-D-14-0067.1
Citation Advice:Malte Diederich, Alexander Ryzhkov, Clemens Simmer, Pengfei Zhang, and Silke Trömel, 2015: Use of Specific Attenuation for Rainfall Measurement at X-Band Radar Wavelengths. Part II: Rainfall Estimates and Comparison with Rain Gauges. J. Hydrometeor, 16, 503–516. doi: http://dx.doi.org/10.1175/JHM-D-14-0067.1
Responsible Party
Creator(s):Author: Malte Diederich
Author: Alexander Ryzhkov
Author: Clemens Simmer
Author: Pengfei Zhang
Author: Silke Troemel
Publisher:American Meteorological Society
Topic
TR32 Topic:Atmosphere
Related Sub-project(s):Z2, D5
Subject(s):CRC/TR32 Keywords: Rainfall Data, Radar/X-Band, Radar, Atmospheric Measurement
File Details
File Name:Diederich_2015_JHM_Part2.pdf
Data Type:Text
Size(s):14 Pages
File Size:2671 kB (2.608 MB)
Date(s):Date Copyrighted: 2015-04-01
Mime Type:application/pdf
Data Format:PDF
Language:English
Status:Completed
Constraints
Download Permission:OnlyTR32
General Access and Use Conditions:According to the TR32DB data policy agreement.
Access Limitations:According to the TR32DB data policy agreement.
Licence:TR32DB Data policy agreement
Geographic
North:-no map data
East:-
South:-
West:-
Measurement Region:NorthRhine-Westphalia
Measurement Location:--NorthRhine-Westphalia--
Specific Informations - Publication
Status:Published
Review:PeerReview
Year:2015
Type:Article
Article Type:Journal
Source:Journal of Hydrometeorology
Issue:2
Volume:16
Number Of Pages:14
Page Range:503 - 516
Metadata Details
Metadata Creator:Malte Diederich
Metadata Created:2015-07-08
Metadata Last Updated:2015-07-08
Subproject:Z2
Funding Phase:3
Metadata Language:English
Metadata Version:V41
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Page Visits:191
Metadata Downloads:0
Dataset Downloads:0
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