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CAESAR is a field campaign designed to understand
the radiative properties of cirrus cloud over a wide range of
wavelengths in combination with airborne in situ measurements
of cirrus microphysical properties. Flights using the FAAM BAe-146
will measure frontal and anvil cirrus, co-incident with the
CloudSat Aqua-train, SEVERI and AATSR satellites over the Chilbolton
cloud radars and lidars as well as ocean/sea surrounding the
UK. Aircraft measurements will be used to obtain vertical profiles
of ice crystal size, shape and IWC and how these quantities
vary in the horizontal direction so that a good statistical
sampling is obtained representative of the cirrus microphysical
state. Measurements will be made at different times of the year
to observe the different types of cirrus clouds.
Scientific aims:
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To improve the representation
of cirrus clouds in Numerical Weather Prediction and Climate
Studies.
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To perform closure studies
relating the cloud microphysics to remote sensing data across
the visible, thermal infrared, far infrared and microwave
regions of the electromagnetic spectrum.
- To validate remotely sensed products from
the A-Train, AATSR, Seviri and Chilbolton Radar.
There are 4 phases to CAESAR:
CAESAR I - Nov/Dec
2005, simultaneously with MICROMIX
CAESAR II - April/May 2006, simultaneously
with VISURB-UK and ICEPIC
CAESAR III - Nov/Dec 2006/Jan
07, simultaneously with IASI and WINTEX
CAESAR IV - July 2007, simultaneously with
VISURB-UK and Land-emiss
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