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@ARTICLE{Weigel:279598,
author = {Weigel, K. and Rozanov, A. and Azam, F. and Bramstedt, K.
and Damadeo, R. and Eichmann, K.-U. and Gebhardt, C. and
Hurst, D. and Krämer, Martina and Lossow, S. and Read, W.
and Spelten, N. and Stiller, G. P. and Walker, K. A. and
Weber, M. and Bovensmann, H. and Burrows, J. P.},
title = {{UTLS} water vapour from {SCIAMACHY} limb measurements
{V}3.01 (2002–2012)},
journal = {Atmospheric measurement techniques discussions},
volume = {8},
number = {7},
issn = {1867-8610},
address = {Katlenburg-Lindau},
publisher = {Copernicus},
reportid = {FZJ-2015-07482},
pages = {7953 - 8021},
year = {2015},
abstract = {The SCanning Imaging Absorption spectroMeter for
Atmospheric CHartographY (SCIAMACHY) aboard the Envisat
satellite provided measurements from August 2002 until April
2012. SCIAMACHY measured the scattered or direct sunlight
using different observation geometries. The limb viewing
geometry allows the retrieval of water vapour at about 10 to
25 km height from the near infrared spectral range
(1353–1410 nm). These data cover the Upper Troposphere and
Lower Stratosphere (UTLS), a region in the atmosphere, which
is of special interest for a variety of dynamical and
chemical processes as well as for the radiative forcing.
Here, the latest data version of water vapour (V3.01) from
SCIAMACHY limb measurements is presented and validated by
comparisons with data sets from other satellite and in situ
measurements. Considering retrieval tests and the results of
these comparisons, the V3.01 data is reliable from about 11
to 23 km and the best results are found in the middle of the
profiles between about 14 and 20 km. Above 20 km in the
extra tropics V3.01 is drier than all other data sets.
Additionally, for altitudes above about 19 km the vertical
resolution of the retrieved profile is not sufficient to
resolve signals with a short vertical structure like the
tape recorder. Below 14 km SCIAMACHY water vapour V3.01 is
wetter than most collocated data sets, but the high
variability of water vapour in the troposphere complicates
the comparison. For 14 to 20 km height, the expected errors
from the retrieval and simulations and the mean differences
to collocated data sets are usually smaller than 10 $\%$
when the resolution of the SCIAMACHY data is taken into
account. In general, the temporal changes agree well with
collocated data sets except for the Northern Hemisphere
extratropical stratosphere, where larger differences are
observed. This indicates a possible drift in V3.01 most
probably caused by the incomplete treatment of volcanic
aerosols in the retrieval. In all other regions a good
temporal stability is shown. In the tropical stratosphere an
increase in water vapour is found between 2002 and 2012,
which is in agreement with other satellite data sets for
overlapping time periods.},
cin = {IEK-7},
ddc = {550},
cid = {I:(DE-Juel1)IEK-7-20101013},
pnm = {244 - Composition and dynamics of the upper troposphere and
middle atmosphere (POF3-244)},
pid = {G:(DE-HGF)POF3-244},
typ = {PUB:(DE-HGF)16},
doi = {10.5194/amtd-8-7953-2015},
url = {https://juser.fz-juelich.de/record/279598},
}