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@ARTICLE{LpezPuertas:842030,
author = {López-Puertas, Manuel and García-Comas, Maya and Funke,
Bernd and Gardini, Angela and Stiller, Gabriele P. and von
Clarmann, Thomas and Glatthor, Norbert and Laeng, Alexandra
and Kaufmann, Martin and Sofieva, Viktoria F. and
Froidevaux, Lucien and Walker, Kaley A. and Shiotani,
Masato},
title = {{MIPAS} {O}bservations of {O}zone in the {M}iddle
{A}tmosphere},
journal = {Atmospheric measurement techniques discussions},
volume = {467},
issn = {1867-8610},
address = {Katlenburg-Lindau},
publisher = {Copernicus},
reportid = {FZJ-2018-00314},
pages = {1 - 35},
year = {2017},
abstract = {In this paper we describe the stratospheric and mesospheric
ozone (version $V5r_O3_m22)$ distributions retrieved from
MIPAS observations in the three middle atmosphere modes (MA,
NLC and UA) taken with an unapodized spectral resolution of
0.0625 cm−1 from 2005 until April 2012. O3 is retrieved
from microwindows in the 14.8 μm and 10 μm spectral
regions and requires non-LTE modelling of the O3 v1 and v3
vibrational levels. Ozone is reliably retrieved from 20 km
in the MA mode (40 km for UA and NLC) up to ~ 105 km
during dark conditions and up to ~ 95 km during
illuminated conditions. Daytime MIPAS O3 has an average
vertical resolution of 3–4 km below 70 km, 6–8 km
at 70–80 km, 8–10 km at 80–90 km and 5–7 km
at the secondary maximum (90–100 km). For nighttime
conditions the vertical resolution is similar below 70 km,
and better in the upper mesosphere and lower thermosphere:
4–6 km at 70–100 km, 4–5 km at the secondary
maximum, and 6–8 km at 100–105 km. The noise error
for daytime conditions is typically smaller than $2 \%$
below 50 km, $2–10 \%$ between 50 and 70 km,
$10–20 \%$ at 70–90 km and $~ 30 \%$ above
95 km. For nighttime, the noise errors are very similar
below around 70 km but significantly smaller above, being
$10–20 \%$ at 75–95 km, $20–30 \%$ at
95–100 km and larger than $30 \%$ above 100 km. The
additional major O3 errors are the spectroscopic data
uncertainties below 50 km $(10–12 \%),$ and the
non-LTE and temperature errors above 70 km. The validation
performed suggests that the spectroscopic errors below
50 km, mainly caused by the O3 air-broadened half-widths
of the v2 band, are overestimated. The non-LTE error
(including the uncertainty of atomic oxygen at nighttime) is
relevant only above ~ 85 km with values of
$15–20 \%.$ The temperature error varies from
$~ 3 \%$ up to 80 km to $15–20 \%$ near 100 km.
Between 50 and 70 km, the pointing and spectroscopic
errors are the dominant uncertainties. The validation
performed in comparisons with SABER, GOMOS, MLS, SMILES and
ACE-FTS shows that MIPAS O3 has an accuracy better than
$5 \%$ at and below 50 km, with a positive bias of a few
percent. In the 50–75 km region, MIPAS O3 has a positive
bias of $~ 10 \%,$ which is possibly caused in part by
O3 spectroscopic errors in the 10 μm region. Between 75
and 90 km, MIPAS nighttime O3 is in agreement with other
instruments by $10 \%,$ but for daytime the agreement is
slightly larger, $~ 10–20 \%.$ Above 90 km, MIPAS
daytime O3 is in agreement with other instruments by
$10 \%.$ At nighttime, however, it shows a positive bias
increasing from $10 \%$ at 90 km to $20 \%$ at
95–100 km, the latter of which is attributed to the
large atomic oxygen abundance used. We also present MIPAS O3
distributions as function of altitude, latitude and time,
showing the major O3 features in the middle and upper
mesosphere. In addition to the rapid diurnal variation due
to photochemistry, the data also show apparent signatures of
the diurnal migrating tide, both during day and nighttime,
as well as the effects of the semi-annual oscillation above
~ 70 km in the tropics and mid-latitudes. The tropical
daytime O3 at 90 km shows a solar signature in phase with
the solar cycle.},
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/amt-2017-467},
url = {https://juser.fz-juelich.de/record/842030},
}