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Semiautonomous FTS Observation System for Remote Sensing of Stratospheric and Tropospheric Gases

Semiautonomous FTS Observation System for Remote Sensing of Stratospheric and Tropospheric Gases A solar-viewing Fourier transform spectrometer (FTS) at Thule, Greenland (76.5°N, 68.8°W, 225 m MSL), has been in operation as part of the Network for the Detection of Atmospheric Composition Change NDACC; formerly the Network for the Detection of Stratospheric Change (NDSC) since 1999. Observations have been made, on average, 77 days yr −1 during the 8 months, excluding polar night. The semiautonomous operation of the instrument, including its associated optical, cryogenic, and control systems, is of primary importance to acquiring long-term data records efficiently and is herein described. Discussed in this paper are the data processing and spectra analysis methodology that are used to convert the measured interferograms into geophysical data products. Vertical profile retrievals derived from the high-resolution solar absorption spectra use the optimal estimation method. Total column amounts then represent the integration of these vertical profiles. As an example of this process, results are presented for daily average total column amounts of HF, HCl, ClONO 2 , and CCl 2 F 2 from 2001 through 2007. The means of unperturbed summertime observations are used in a preliminary study of their annual trends. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Atmospheric and Oceanic Technology American Meteorological Society

Semiautonomous FTS Observation System for Remote Sensing of Stratospheric and Tropospheric Gases

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Publisher
American Meteorological Society
Copyright
Copyright © 2008 American Meteorological Society
ISSN
1520-0426
DOI
10.1175/2009JTECHA1230.1
Publisher site
See Article on Publisher Site

Abstract

A solar-viewing Fourier transform spectrometer (FTS) at Thule, Greenland (76.5°N, 68.8°W, 225 m MSL), has been in operation as part of the Network for the Detection of Atmospheric Composition Change NDACC; formerly the Network for the Detection of Stratospheric Change (NDSC) since 1999. Observations have been made, on average, 77 days yr −1 during the 8 months, excluding polar night. The semiautonomous operation of the instrument, including its associated optical, cryogenic, and control systems, is of primary importance to acquiring long-term data records efficiently and is herein described. Discussed in this paper are the data processing and spectra analysis methodology that are used to convert the measured interferograms into geophysical data products. Vertical profile retrievals derived from the high-resolution solar absorption spectra use the optimal estimation method. Total column amounts then represent the integration of these vertical profiles. As an example of this process, results are presented for daily average total column amounts of HF, HCl, ClONO 2 , and CCl 2 F 2 from 2001 through 2007. The means of unperturbed summertime observations are used in a preliminary study of their annual trends.

Journal

Journal of Atmospheric and Oceanic Technology – American Meteorological Society

Published: Sep 23, 2008

References

  • Halogen Occultation Experiment confirmation of stratospheric chlorine decreases in accordance with the Montreal Protocol.
    Anderson
  • A nonlinear least squares method of determining line intensities and half-widths.
    Chang
  • On the use of HF as a reference for the comparison of stratospheric observations and models.
    Chipperfield
  • Improved vibration-rotation (0-1) HBr line parameters for validating high resolution infrared atmospheric spectra measurements.
    Coffey
  • A reconstructed view of polar stratospheric chemistry.
    Coffey
  • Error analysis for the ground-based microwave ozone measurements during STOIC.
    Connor
  • GENLN2: A general line-by-line atmospheric transmittance and radiance model.
    Edwards
  • Air mass computer program for atmospheric transmittance/radiance calculation: FSCATM.
    Gallery
  • Network for the Detection of Stratospheric Change Fourier transform infrared intercomparison at Table Mountain Facility, November 1996.
    Goldman
  • Intercomparison of NDSC ground-based solar FTIR measurements of atmospheric gases at Lauder, New Zealand.
    Griffith
  • Analysis of the instrumental line shape of high-resolution Fourier transform IR spectrometers with gas cell measurements and new retrieval software.
    Hase
  • Intercomparison of retrieval codes used for the analysis of high-resolution, ground-based FTIR measurements.
    Hase
  • Network for the detection of stratospheric change (NDSC).
    Kurylo
  • The NDSC—Its status after 10 years of operation.
    Kurylo
  • The Goddard Automailer.
    Lait
  • Improvements to air mass calculation for ground-based infrared measurements.
    Meier
  • Evidence of reduced measurement uncertainties from an FTIR instrument intercomparison at Kiruna, Sweden.
    Meier
  • Stratospheric sink for chlorofluoromethanes: Chlorine atom-catalysed destruction of ozone.
    Molina
  • Total column densities of tropospheric and stratospheric trace gases in the undisturbed Arctic summer atmosphere.
    Notholt
  • An uncertainty budget for ground-based Fourier transform infrared column measurements of HCl, HF, N2O, and HNO3 deduced from results of side-by-side instrument intercomparisons.
    Paton Walsh
  • Southern Hemisphere ground based measurements of carbonyl fluoride (COF2) and hydrogen fluoride (HF): Partitioning between fluoride reservoir species.
    Reisinger
  • Ground-based infrared spectroscopic measurements of atmospheric hydrogen cyanide.
    Rinsland
  • Northern and southern hemisphere ground-based infrared spectroscopic measurements of tropospheric carbon monoxide and ethane.
    Rinsland
  • Stratospheric HF column abundances above Kitt Peak (31.9°N latitude): trends from 1977 to 2001 and correlations with stratospheric HCl columns.
    Rinsland
  • Long-term trends of inorganic chlorine from ground-based infrared solar spectra: Past increases and evidence for stabilization.
    Rinsland
  • Trends of HF, HCl, CCl2F2, CCl3F, CHClF2 (HCFC-22), and SF6 in the lower stratosphere from Atmospheric Chemistry Experiment (ACE) and Atmospheric Trace Molecule Spectroscopy (ATMOS) measurements near 30°N latitude.
    Rinsland
  • Long-term evolution in the tropospheric concentration of chlorofluorocarbon 12 (CCl2F2) derived from high-spectral resolution infrared solar absorption spectra: Retrieval and comparison with in situ surface measurements.
    Rinsland
  • Retrieval of atmospheric temperature and composition from remote measurements of thermal radiation.
    Rodgers
  • Characterization and error analysis of profiles retrieved from remote sounding measurements.
    Rodgers
  • Inverse Methods for Atmospheric Sounding: Theory and Practice.
    Rodgers
  • The HITRAN 2004 molecular spectroscopic database.
    Rothman
  • The budget and partitioning of stratospheric chlorine during the 1997 Arctic summer.
    Sen
  • Stratospheric ozone depletion: A review of concepts and history.
    Solomon
  • Infrared aircraft measurements of stratospheric composition over Antarctica during September 1987.
    Toon
  • Comparison of MkIV balloon and ER-2 aircraft measurements of atmospheric trace gases.
    Toon
  • Stratospheric ozone depletion by ClONO2 photolysis.
    Toumi
  • Is upper stratospheric chlorine decreasing as expected?
    Waugh
  • Scientific assessment of ozone depletion: 2006.
    WMO