Estimation of rain kinetic energy flux density from radar reflectivity and/or rain rate

N. Yu, B. Boudevillain, P. Hazenberg, R. Uijlenhoet

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

Abstract

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 pdf and 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 I and Z yields a significant improvement of estimation of KE.
Original languageEnglish
Title of host publicationProceedings of a symposium held in Exeter, UK, april 2011
PublisherIAHS
Pages141-146
Publication statusPublished - 2012

Publication series

NameIAHS publication
Number351
ISSN (Print)0144-7815

Fingerprint

energy flux
reflectivity
kinetic energy
radar
probability density function
rainfall
raindrop
rate
rain
parameter

Cite this

Yu, N., Boudevillain, B., Hazenberg, P., & Uijlenhoet, R. (2012). Estimation of rain kinetic energy flux density from radar reflectivity and/or rain rate. In Proceedings of a symposium held in Exeter, UK, april 2011 (pp. 141-146). (IAHS publication; No. 351). IAHS.
Yu, N. ; Boudevillain, B. ; Hazenberg, P. ; Uijlenhoet, R. / Estimation of rain kinetic energy flux density from radar reflectivity and/or rain rate. Proceedings of a symposium held in Exeter, UK, april 2011. IAHS, 2012. pp. 141-146 (IAHS publication; 351).
@inproceedings{586b90c3cac645d2bad3c64bcaa1c98f,
title = "Estimation of rain kinetic energy flux density from radar reflectivity and/or rain rate",
abstract = "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 pdf and 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 I and Z yields a significant improvement of estimation of KE.",
author = "N. Yu and B. Boudevillain and P. Hazenberg and R. Uijlenhoet",
year = "2012",
language = "English",
series = "IAHS publication",
publisher = "IAHS",
number = "351",
pages = "141--146",
booktitle = "Proceedings of a symposium held in Exeter, UK, april 2011",

}

Yu, N, Boudevillain, B, Hazenberg, P & Uijlenhoet, R 2012, Estimation of rain kinetic energy flux density from radar reflectivity and/or rain rate. in Proceedings of a symposium held in Exeter, UK, april 2011. IAHS publication, no. 351, IAHS, pp. 141-146.

Estimation of rain kinetic energy flux density from radar reflectivity and/or rain rate. / Yu, N.; Boudevillain, B.; Hazenberg, P.; Uijlenhoet, R.

Proceedings of a symposium held in Exeter, UK, april 2011. IAHS, 2012. p. 141-146 (IAHS publication; No. 351).

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

TY - GEN

T1 - Estimation of rain kinetic energy flux density from radar reflectivity and/or rain rate

AU - Yu, N.

AU - Boudevillain, B.

AU - Hazenberg, P.

AU - Uijlenhoet, R.

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 pdf and 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 I and 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 pdf and 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 I and Z yields a significant improvement of estimation of KE.

M3 - Conference contribution

T3 - IAHS publication

SP - 141

EP - 146

BT - Proceedings of a symposium held in Exeter, UK, april 2011

PB - IAHS

ER -

Yu N, Boudevillain B, Hazenberg P, Uijlenhoet R. Estimation of rain kinetic energy flux density from radar reflectivity and/or rain rate. In Proceedings of a symposium held in Exeter, UK, april 2011. IAHS. 2012. p. 141-146. (IAHS publication; 351).