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From the same journal

From the same journal

Validation of the Atmospheric Chemistry Experiment (ACE) version 2.2 temperature using ground-based and space-borne measurements

Research output: Contribution to journalArticle

Author(s)

  • R. J. Sica
  • M. R. M. Izawa
  • K. A. Walker
  • C. Boone
  • S. V. Petelina
  • P. S. Argall
  • G. B. Burns
  • V. Catoire
  • R. L. Collins
  • W. H. Daffer
  • C. De Clercq
  • Z. Y. Fan
  • B. J. Firanski
  • W. J. R. French
  • P. Gerard
  • M. Gerding
  • J. Granville
  • J. L. Innis
  • P. Keckhut
  • T. Kerzenmacher
  • A. R. Klekociuk
  • E. Kyro
  • J. C. Lambert
  • E. J. Llewellyn
  • G. L. Manney
  • I. S. McDermid
  • K. Mizutani
  • Y. Murayama
  • C. Piccolo
  • P. Raspollini
  • M. Ridolfi
  • C. Robert
  • W. Steinbrecht
  • K. B. Strawbridge
  • K. Strong
  • R. Stuebi
  • B. Thurairajah

Department/unit(s)

Publication details

JournalAtmospheric Chemistry and Physics
DatePublished - 2008
Issue number1
Volume8
Number of pages28
Pages (from-to)35-62
Original languageEnglish

Abstract

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.

    Research areas

  • CANADIAN METEOROLOGICAL CENTER, RESOLUTION DOPPLER IMAGER, DATA ASSIMILATION SYSTEM, LIDAR MEASUREMENTS, MESOSPHERIC TEMPERATURE, MIDDLE ATMOSPHERE, STRATOSPHERIC TEMPERATURES, RESEARCH SATELLITE, LIMB-EMISSION, MIXING-RATIO

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