TY - GEN
T1 - Estimation of rain kinetic energy flux density from radar reflectivity factor and/or rain rate
AU - Nan, Y. U.
AU - Delrieu, G. U.Y.
AU - Boudevillain, Brice
AU - Hazenberg, Pieter
AU - Uijlenhoet, Remko
PY - 2012
Y1 - 2012
N2 - This study offers an approach to estimate the rainfall kinetic energy (KE) by rain intensity (I) and radar reflectivity factor (Z) separately, or jointly, based on the one- or two-moment scaled raindrop size distribution (DSD) formulation, which contains (a) I and/or Z observations, (b) dimensionless probability density function (pdf) and (c) some intrinsic parameters. The key point of this formulation is to explain all variability of the DSD by the evolution of observations, hence the paland intrinsic parameters are considered as constants. A robust method is proposed to estimate the climatic values for these parameters, and our 28-month DSD data are used to test this estimation process. The results show that three relationships (KE-I, KE-Z and KE-IZ) which link the observations (I and/or Z) to rainfall kinetic energy (KE) are well established based on the climatic scaled DSD formulation. In particular, the combination of Iand Z yields a significant improvement of estimation of KE.
AB - This study offers an approach to estimate the rainfall kinetic energy (KE) by rain intensity (I) and radar reflectivity factor (Z) separately, or jointly, based on the one- or two-moment scaled raindrop size distribution (DSD) formulation, which contains (a) I and/or Z observations, (b) dimensionless probability density function (pdf) and (c) some intrinsic parameters. The key point of this formulation is to explain all variability of the DSD by the evolution of observations, hence the paland intrinsic parameters are considered as constants. A robust method is proposed to estimate the climatic values for these parameters, and our 28-month DSD data are used to test this estimation process. The results show that three relationships (KE-I, KE-Z and KE-IZ) which link the observations (I and/or Z) to rainfall kinetic energy (KE) are well established based on the climatic scaled DSD formulation. In particular, the combination of Iand Z yields a significant improvement of estimation of KE.
KW - Kinetic energy
KW - Radar reflectivity factor
KW - Rain intensity
KW - Raindrop size distribution
UR - http://www.scopus.com/inward/record.url?scp=84883109545&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84883109545
SN - 9781907161261
T3 - IAHS-AISH Publication
SP - 141
EP - 146
BT - Weather Radar and Hydrology
T2 - International Symposium on Weather Radar and Hydrology, WRaH 2011
Y2 - 18 April 2011 through 21 April 2011
ER -