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@ARTICLE{Neis:276123,
author = {Neis, P. and Smit, Herman G.J. and Krämer, M. and Spelten,
N. and Petzold, Andreas},
title = {{E}valuation of the {MOZAIC} {C}apacitive {H}ygrometer
during the airborne field study {CIRRUS}-{III}},
journal = {Atmospheric measurement techniques},
volume = {8},
number = {3},
issn = {1867-8548},
address = {Katlenburg-Lindau},
publisher = {Copernicus},
reportid = {FZJ-2015-06600},
pages = {1233 - 1243},
year = {2015},
abstract = {The MOZAIC Capacitive Hygrometer (MCH) is usually operated
aboard passenger aircraft in the framework of MOZAIC
(Measurement of Ozone by Airbus In-Service Aircraft) for
measuring atmospheric relative humidity (RH). In order to
evaluate the performance of the MCH, the instrument was
operated aboard a Learjet 35A research aircraft as part of
the CIRRUS-III field study together with a closed-cell
Lyman-α fluorescence hygrometer (Fast in situ Stratospheric
Hygrometer, or FISH) and an open-path tunable diode laser
system (Open-path Jülich Stratospheric TDL ExpeRiment, or
OJSTER) for water vapour measurement. After reducing the
CIRRUS-III data set to data corresponding to MOZAIC aircraft
operation conditions, the 1 Hz RH data cross correlation
between the MCH and reference instruments FISH (clear sky)
and OJSTER (in-cirrus) yielded a remarkably good agreement
of R2 = 0.92 and slope m = 1.02 and provided a MCH
uncertainty of $5\%$ RH. Probability distribution functions
of RH deduced from the MCH and reference instruments agreed
well between 10 and $70\%$ RH with respect to liquid water
in the ambient temperature range of ca. −70 to −40 °C.
The use of MCH data is limited to sensor temperatures above
the calibration limit of Tsensor = −40 °C (corresponds to
ambient temperature of Tambient = −70 °C at typical
cruising speed of long-haul passenger aircraft). Good
performance of the MCH for clear sky as well as for
in-cirrus conditions demonstrated the sensor robustness also
for operation inside ice clouds.},
cin = {IEK-8 / IEK-7},
ddc = {550},
cid = {I:(DE-Juel1)IEK-8-20101013 / I:(DE-Juel1)IEK-7-20101013},
pnm = {243 - Tropospheric trace substances and their
transformation processes (POF3-243) / HITEC - Helmholtz
Interdisciplinary Doctoral Training in Energy and Climate
Research (HITEC) (HITEC-20170406)},
pid = {G:(DE-HGF)POF3-243 / G:(DE-Juel1)HITEC-20170406},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000352158300017},
doi = {10.5194/amt-8-1233-2015},
url = {https://juser.fz-juelich.de/record/276123},
}