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Level 2a Cloudnet product:

Ice cloud parameters (RadOn vtz IPSL method)

Data Home | Overview of Cloudnet products | Product list | Quicklooks | Conditions of use

Summary

Designation
iwc-radon-vtz-ipsl
Level
2a
Algorithm design/Product maintainer
Institute
Centre d'étude des Environnements Terrestre et Planétaires (CETP)
Description
Ice cloud parameters such as water content and effective radius, derived by combining radar reflectivity and Doppler velocity using an empirical formula derived using aircraft data.
Documentation
None yet available
Relevant publication(s)
Pending
Quicklooks
http://www.met.rdg.ac.uk/radar/cloudnet/quicklooks/
Suggested acknowledgement
We acknowledge the Cloudnet project (European Union contract EVK2-2000-00611) for providing the ice water content data, which was produced by the Centre d'étude des Environnements Terrestre et Planétaires (CETP) using measurements from [SITE].

Dataset contents

Sample NetCDF file: 20031001_chilbolton_iwc-radon-vtz-ipsl.nc
Header of sample NetCDF file in ASCII: 20031001_chilbolton_iwc-radon-vtz-ipsl.cdl

The following is a description of the variables in this product, produced automatically from the metadata in the sample file (using the nc2html unix utility):

Dataset title: RadOn retrieval

    Institution:CETP/IPSL

Dimensions and coordinate variables

time
Decimal hours from midnight UTC to the middle of each ray
    Units:hours since 2003-10-01 00:00:00 +00:00
    Type:single-precision floating-point vector
height
Height above mean sea level
    Units:m
    Type:single-precision floating-point vector

Variables

Dl

    diameter limit for variable density ice, below this value solid ice

    Units:m
    Type:single-precision floating-point scalar
arho

    coefficient a in the density diameter relationship rho=aD^b D in cm rho in g/cm^3

    Type:single-precision floating-point scalar
brho

    coefficient b in the density diameter relationship rho=aD^b D in cm rho in g/cm^3

    Type:single-precision floating-point scalar
gammA

    coefficient sigma in the Area diameter relationship A=gammaD^sigma D in cm rho in cm^2

    Type:single-precision floating-point scalar
sigmA
    Type:single-precision floating-point scalar
avdZ

    avdZ in Vd=avdz*Z^bvdZ (Z in mm6/m^3 and Vd in cm/s)

    Type:single-precision floating-point scalar
bvdZ

    bvdZ in Vd=avdz*Z^bvdZ (Z in mm6/m^3 and Vd in cm/s)

    Type:single-precision floating-point scalar
avtZ

    avtZ in Vt=avtz*Z^bvtZ (Z in mm6/m^3 and Vt in cm/s)

    Type:single-precision floating-point scalar
bvtZ

    bvtZ in Vt=avtz*Z^bvtZ (Z in mm6/m^3 and Vt in cm/s)

    Type:single-precision floating-point scalar
iwc(time, height)
Ice water content
    Units:kg m-3
    Type:single-precision floating-point array
    Variable containing the random error in iwc:iwc_error
iwc_error(time, height)
Random error in ice water content

    relative rms error in ice water content

    Units:%
    Type:single-precision floating-point array
re1(time, height)
Effective radius
    Units:m
    Type:single-precision floating-point array
    Variable containing the random error in re1:re_error
re2(time, height)
Effective radius
    Units:m
    Type:single-precision floating-point array
    Variable containing the random error in re2:re_error
re_error(time, height)
Random error in effective radius

    relative rms error in effective radius

    Units:%
    Type:single-precision floating-point array
Dm(time, height)
Mean volume diamater
    Units:m
    Type:single-precision floating-point array
alpha(time, height)
Extinction
    Units:(m)-1
    Type:single-precision floating-point array
    Variable containing the random error in alpha:alpha_error
alpha_error(time, height)
Random error in extinction

    relative rms error in extinction

    Units:%
    Type:single-precision floating-point array
N0star(time, height)
N0star
    Units:m-4
    Type:single-precision floating-point array
    Variable containing the random error in N0star:N0star_error
N0star_error(time, height)
Random error in N0star

    relative rms error in N0star

    Units:%
    Type:single-precision floating-point array
w(time, height)
vertical air velocity
    Units:m s-1
    Type:single-precision floating-point array
vt(time, height)
Terminal fall velocity
    Units:m s-1
    Type:single-precision floating-point array
tau(time)
Optical depth
    Type:single-precision floating-point vector
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