Radar and satellite structured algorithm system for the ... - FLOODsite

Radar and satellite structured algorithm
system for the detection of storm rainfall
Task 15
GOCE-CT-2004-505420
Radar Structured Algorithm System (1/2)
Physically-based algorithms
Developed in part under previous EC projects
No “early-merging” with raingauge data
Innovative processing algorithms
Radar calibration stability with ground clutter (GC) - INPG
Dynamic GC identification based on pulse-to-pulse
variability – INPG
DSD profile generator and attenuation correction - WUR
Coupled identification of the rain types (convective,
stratiform) and the vertical profiles of reflectivity (VPR) –
INPG
QPE product: weighted average in the vertical, Z-R
relations conditional on rain types, horizontal advection –
INPG
Parameterization of typed Z-R relationships - INPG

Radar Structured Algorithm System (2/2)
Radar SAS assessment:
Bollène 2002 experiment: evaluation of several radar
QPE strategies (including or not the space-time adaptive
algorithms) with respect to raingauge reference rainfall
– INPG
Application of the “Generalized likelihood uncertainty
estimation (GLUE)” to radar SAS – uncertainty related to
parameterization – structural deficiency of the
processing algorithms UniPad
Satellite Structured Algorithm System - TUD
Meteosat 6 Rapid Scan:
6 estimation methods: GWT, AE, GMSRA, Grose et al., ECST,
“Combined Method” from TUD
Use of auxiliary information (DTM, wind and moisture fields)
Assessment for the French Gard 2002 case and the Italian
Val Pustiria 2005 case
Meteosat Second generation:
4 estimation methods: AE, ECST, GOES, Kurino et al.
Use of auxiliary information
Assessment for the Italian Val Pustiria 2005 case and the
German Elbe 2006 case

Completion:
2007-2008:
– INPG:
big effort on the VPR estimation,
Preliminary characterization of the DSD and Z-R relationships in the
Cévennes
Extended verification of the radar SAS codes and their
parameterization; definition and implementation of several
processing strategies
Radar QPE assessment and development of a radar QPE error
model.
– UniPad:
Major revision of the work on radar uncertainty assessment,
following a first submission; report delivered January 2008
– TUD:
final report delivered to task leader in July 2007
– WUR: finished in 2006
Final report (INPG):
– Integration of the UniPad + WUR + TUD work: done
– Finalize 2 articles for J. Appl. Meteor.
– Final report + executive summary

Publications
Published:
Berne, A. and Uijlenhoet, R., 2005: A stochastic model of range profiles of
raindrop size distributions; application to radar attenuation correction.
Geophysical Research Letters 32, L10803, doi 10.1029/2004GL021899.
Berne, A. and R. Uijlenhoet, 2006: Quantitative analysis of X-band
weather radar attenuation correction accuracy, NHESS, in press.
Delrieu, G., P.-E. Kirstetter and B. Boudevillain, 2006: Vers un modèle
d’erreur pour la mesure des pluies par radar météorologique en région
Cévennes-Vivarais, La Houille Blanche, N° 6-2006.
Chapon, B., G. Delrieu, M. Gosset, and B. Boudevillain, 2008: Variability of
rain drop size distribution and its effet on the Z-R relationship - A case
study for intense Mediterranean precipitation. Atmospheric Research,
accepted.
Submitted:
Kirstetter, P.-E., G. Delrieu, B. Boudevillain, and C. Obled, 2008: Toward
an error model for radar quantitative precipitation estimation in the
Cévennes-Vivarais region, France. Advances in Water Resources,
submitted (february 2008).
Norbiato, D. and M. Borga, 2008: Sensitivity and uncertainty analysis for
radar rainfall estimation at the ground. Advances in Water Resources,
submitted (february 2008)
Publications
In preparation:
Delrieu, G., B. Boudevillain, J. Nicol, B. Chapon, P.-E. Kirstetter, H.
Andrieu, and D. Faure, 2008: Bollène 2002 experiment: radar rainfall
estimation in the Cévennes-Vivarais region, France. Part 1: innovative
identification procedures. Journal of Applied Meteorology, to be submitted
now.
Boudevillain, B., P.-E. Kirstetter, G. Delrieu, and J. Nicol, 2008: Bollène
2002 experiment: radar rainfall estimation in the Cévennes-Vivarais
region, France. Part 2 implementation and evaluation of several processing
strategies. Journal of Applied Meteorology, To be submitted now.
Bernofer, C. et al., 2008: Analysing heavy precipitation events over
Europe in regions of distinct orography using Meteosat 6 Rapid Scan. In
preparation for Journal of Hydroloy
Bernofer et al. 2008: Testing satelilte based rainfall estimation techniques
concerning their applicability to Meteosat Second Genration data. In
preparation for Atmospheric Chemistry and Physics.

Dry-weather clutter
0.8°
3.6°
Mean Z (dBZ) Occurrence (%) Mean MAD (dBZ)

Dynamic GC identification and correction
a b
c d
Coupled rain-typing and VPR identification
Altitude
(km asl)
Z/Z0 (dB) Z/Z0 (dB) Z/Z0 (dB)
global convective stratiform

Radar SAS assessment with GLUE
Alpone
Posina
MSG Satellite SAS assessment
Corrected auto-estimator Corrected GMSRA after Kurino et al.
16 June 2006
1300 – 1400 UTC
4x8 km²
Dresden
radar data