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From the same journal

Validation of the Atmospheric Chemistry Experiment by noncoincident MkIV balloon profiles

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Published copy (DOI)

Author(s)

  • Voltaire A. Velazco
  • Geoffrey C. Toon
  • Jean-Francois L. Blavier
  • Armin Kleinboehl
  • Gloria L. Manney
  • William H. Daffer
  • Peter F. Bernath
  • Kaley A. Walker
  • Chris Boone

Department/unit(s)

Publication details

JournalJournal of Geophysical Research
DatePublished - 25 Mar 2011
Issue number6
Volume116
Number of pages17
Pages (from-to)-
Original languageEnglish

Abstract

We have compared volume mixing ratio profiles of atmospheric trace gases measured by the Atmospheric Chemistry Experiment (ACE) version 2.2 and the MkIV solar occultation Fourier transform infrared spectrometers. These gases are H2O, O-3, N2O, CO, CH4, HNO3, HF, HCl, OCS, ClONO2, HCN, CH3Cl, CF4, CCl2F2, CCl3F, COF2, CHF2Cl, and SF6. Due to the complete lack of close spatiotemporal coincidences between the ACE occultations and the MkIV balloon flights, we used potential temperatures and equivalent latitudes from analyzed meteorological fields to find comparable ACE and MkIV profiles. The results show excellent agreement for CH4, N2O, and other long-lived gases but slightly poorer agreement for shorter-lived species like CO, O-3, and HCN. For example, in the upper troposphere (similar to 400-650 K), maximum differences between MkIV and ACE are 2.4% for CH4, 1.7% for N2O, -12.4% for CO, -15.9% for O-3, and -5.6% for HCN. In the lower stratosphere (similar to 650-900 K), maximum MkIV-ACE differences are 7.6% for CH4, 14.1% for N2O, 7.3% for CO, -9.2% for O-3, and 31.5% for HCN. Apart from a small vertical misregistration problem, the overall agreement between MkIV and ACE is very good.

    Research areas

  • FOURIER-TRANSFORM SPECTROMETER, ACE-FTS, LOWER STRATOSPHERE, UPPER TROPOSPHERE, SATELLITE, INSTRUMENT, METHANE, CLONO2, SPACE, WATER

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