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Level 2a Cloudnet product:

Ice cloud parameters (radar/lidar IPSL method)

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Summary

Designation
ice-radar-lidar-ipsl
Level
2a
Algorithm design/Product maintainer
Institute
Centre d'Útude des Environnements Terrestre et PlanÚtaires (CETP)
Description
Ice cloud parameters such as water content and effective radius, derived by combining radar and lidar. This product is expected to be more accurate than the ice water content derived from radar and temperature, but it only operates in a subset of the ice clouds that the lidar was able to detect.
Documentation
See relevant publication
Relevant publication(s)
Tinel, C., J. Testud, J. Pelon, R.J. Hogan, A. Protat, J. Delanoe and D. Bouniol, 2005: The retrieval of ice cloud properties from cloud radar and lidar synergy. J. Appl. Meteor., in press.
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 radar/lidar ice cloud retrieval, which was produced by the Centre d'Útude des Environnements Terrestre et PlanÚtaires (CETP) using measurements from [SITE].

Dataset contents

Sample NetCDF file: 20031001_chilbolton_ice-radar-lidar-ipsl.nc
Header of sample NetCDF file in ASCII: 20031001_chilbolton_ice-radar-lidar-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: Calculated microphysical properties from radar lidar combination - IPSL algorithm

    Institution:CETP/IPSL/CNRS
    References:Tinel, C., J. Testud, J. Pelon, R.J. Hogan, A. Protat, J. Delanoe and D. Bouniol, 2005: The retrieval of ice cloud properties from cloud radar and lidar synergy. J. Appl. Meteor.

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
range
Range from antenna to the centre of each range gate
    Units:m
    Type:single-precision floating-point vector

Variables

radar_frequency
Radar frequency
    Units:GHz
    Type:single-precision floating-point scalar
lidar_wavelength
Lidar wavelength
    Units:nm
    Type:single-precision floating-point scalar
latitude
Latitude of antenna
    Units:degrees_north
    Type:single-precision floating-point scalar
longitude
Longitude of antenna
    Units:degrees_east
    Type:single-precision floating-point scalar
altitude
Height of the instrument above mean sea level
    Units:m
    Type:single-precision floating-point scalar
K(time, range)
Radar attenuation
    Units:dBZ km-1
    Type:single-precision floating-point array
alpha(time, range)
Lidar extinction
    Units:m-1
    Type:single-precision floating-point array
beta(time, range)
Lidar backscattering coefficient
    Units:km-1 steradian-1
    Type:single-precision floating-point array
iwc(time, range)
Ice water content
    Units:g m-3
    Type:single-precision floating-point array
Re(time, range)
Effective radius
    Units:Ám
    Type:single-precision floating-point array
N0star(time, range)
N0star
    Units:m-4
    Type:single-precision floating-point array
tau(time)
Optical thickness
    Type:single-precision floating-point vector
k(time)
Linear phase function
    Units:steradian
    Type:single-precision floating-point vector
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