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Atmospheric Chemistry and Physics Discussions 7, 4 (2007) 12463-12539
Validation of the Atmospheric Chemistry Experiment (ACE) version 2.2 temperature using ground-based and space-borne measurements
R. J. Sica 1, M. R. M. Izawa 2, K. A. Walker 3, 4, C. Boone 3, S. V. Petelina 5, 6, P. S. Argall 1, P. Bernath 3, 7, G. B. Burns 8, V. Catoire 9, R. L. Collins 10, W. H. Daffer 11, C. De Clercq 12, Z. Y. Fan 3, B. J. Firanski 13, W. J. R. French 8, P. Gerard 12, M. Gerding 14, J. Granville 12, J. L. Innis 8, P. Keckhut 15, T. Kerzenmacher 4, A. R. Klekociuk 8, E. Kyrö 16, J. C. Lambert 12, E. J. Llewellyn 5, G. L. Manney 17, 18, I. S. Mcdermid 17, K. Mizutani 19, Y. Murayama 19, C. Piccolo 20, P. Raspollini 21, M. Ridolfi 22, C. Robert 9, W. Steinbrecht 23, K. B. Strawbridge 13, K. Strong 4, R. Stübi 24, B. Thurairajah 10
(2007-08-23)

An ensemble of space-borne and ground-based instruments has been used to evaluate the quality of the version 2.2 temperature retrievals from the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS). The agreement of ACE-FTS temperatures with other sensors is typically better than 2 K in the stratosphere and upper troposphere and 5 K in the lower mesosphere. There is evidence of a systematic high bias (roughly 3–6 K) in the ACE-FTS temperatures in the mesosphere, and a possible systematic low bias (roughly 2 K) in ACE-FTS temperatures near 23 km. Some ACE-FTS temperature profiles exhibit unphysical oscillations, a problem fixed in preliminary comparisons with temperatures derived using the next version of the ACE-FTS retrieval software. Though these relatively large oscillations in temperature can be on the order of 10 K in the mesosphere, retrieved volume mixing ratio profiles typically vary by less than a percent or so. Statistical comparisons suggest these oscillations occur in about 10% of the retrieved profiles. Analysis from a set of coincident lidar measurements suggests that the random error in ACE-FTS version 2.2 temperatures has a lower limit of about ±2 K.
1:  Department of Physics and Astronomy
The University of Western Ontario
2:  Department of Earth Sciences
The University of Western Ontario
3:  Department of Chemistry
University of Waterloo, Ontario
4:  Department of Physics
Department of Physics
5:  Institute of Space and Atmospheric Studies
Institute of Space and Atmospheric Studies
6:  Department of Physics
Department of Physics
7:  Department of Chemistry
Department of Chemistry
8:  Ice
ocean
9:  Laboratoire de physique et chimie de l'environnement (LPCE)
CNRS : UMR6115 – INSU – Université d'Orléans
10:  Geophysical Institute and Atmospheric Sciences Program
University of Alaska Fairbanks
11:  Columbus Technologies Inc.
Columbus Technologies Inc.
12:  Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB)
Belgian Institute for Space Aeronomy
13:  Science and Technology Branch
Environment Canada
14:  Leibniz-Institute of Atmospheric Physics
Leibniz-Institute of Atmospheric Physics
15:  Service d'aéronomie (SA)
CNRS : UMR7620 – INSU – Université Pierre et Marie Curie (UPMC) - Paris VI – Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)
16:  Finnish Meteorological Institute – Arctic Research Centre
Finnish Meteorological Institute – Arctic Research Centre
17:  Jet Propulsion Laboratory [NASA] (JPL)
NASA – California Institute of Technology
18:  New Mexico Institute of Mining and Technology
New Mexico Institute of Mining and Technology
19:  National Institute of Information and Communications Technology (NICT)
National Institute of Information and Communications Technology
20:  Department of Atmospheric
Oceanic and Planetary Physics
21:  Istituto di Fisica Applicata 'Nello Carrara' (IFAC) del Consiglio Nazionale delle Ricerche (CNR)
Istituto di Fisica Applicata 'Nello Carrara' (IFAC) del Consiglio Nazionale delle Ricerche (CNR)
22:  Dip. di Chimica Fisica e Inorganica
Dip. di Chimica Fisica e Inorganica
23:  Deutsche Wetterdienst (DWD)
Deutsche Wetterdienst (DWD)
24:  Federal Office of Meteorology and Climatology
Federal Office of Meteorology and Climatology
Sciences of the Universe/Ocean, Atmosphere
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