The retrieval of profile and chemical information from ground-based UV-visible spectroscopic measurements

Abstract An algorithm has been developed to retrieve altitude information at different diurnal stages for trace gas species by combining direct-sun and zenith-sky UV-visible differential slant column density (DSCD) measurements. DSCDs are derived here using differential optical absorption spectroscopy. Combining the complementary zenith-sky measurements (sensitive to the stratosphere) with direct-sun measurements (sensitive to the troposphere) allows this vertical distinction. Trace gas species such as BrO and NO 2 have vertical profiles with strong diurnal dependence. Information about the diurnal variation is simultaneously retrieved with the altitude distribution of the trace gas. The retrieval is a formal optimal estimation profile retrieval, allowing a complete assessment of information content and errors.

[1]  K. Pfeilsticker,et al.  Stratospheric BrO profiles measured at different latitudes and seasons: Instrument description, spectral analysis and profile retrieval , 1998 .

[2]  M. Chipperfield,et al.  First profile measurements of tropospheric BrO , 2000 .

[3]  A. Bucholtz,et al.  Rayleigh-scattering calculations for the terrestrial atmosphere. , 1995, Applied optics.

[4]  Retrieval of vertical concentration profiles from OSIRIS UV-visible limb spectra , 2002 .

[5]  John P. Burrows,et al.  GOME MEASUREMENTS OF STRATOSPHERIC AND TROPOSPHERIC BrO , 2002 .

[6]  Michael Eisinger,et al.  The Global Ozone Monitoring Experiment (GOME): Mission Concept and First Scientific Results , 1999 .

[7]  I. Boyd,et al.  Trends and variability in vertical ozone and temperature profiles measured by ozonesondes at Lauder, New Zealand: 1986–1996 , 1998 .

[8]  Martyn P. Chipperfield,et al.  Multiannual simulations with a three‐dimensional chemical transport model , 1999 .

[9]  F. X. Kneizys,et al.  Atmospheric transmittance/radiance: Computer code LOWTRAN 5 , 1978 .

[10]  Giorgio Giovanelli,et al.  Intercomparison of UV/visible spectrometers for measurements of stratospheric NO2 for the Network for the Detection of Stratospheric Change , 1995 .

[11]  Roderic L. Jones,et al.  Retrieval of NO2 vertical profiles from ground‐based UV‐visible measurements: Method and validation , 1997 .

[12]  D. Toublanc,et al.  Henyey-Greenstein and Mie phase functions in Monte Carlo radiative transfer computations. , 1996, Applied optics.

[13]  James B. Kerr,et al.  Altitude distributions of stratospheric constituents from ground‐based measurements at twilight , 1991 .

[14]  William G. Read,et al.  Direct retrieval of line‐of‐sight atmospheric structure from limb sounding observations , 2000 .

[15]  J. P. Smith,et al.  Visible and near‐ultraviolet spectroscopy at McMurdo Station, Antarctica: 9. Observations of OClO from April to October 1991 , 1993 .

[16]  J. Kerr,et al.  Nitrogen Dioxide Concentrations in the Atmosphere , 1973, Nature.

[17]  Howard K. Roscoe,et al.  Ozone measurements by zenith-sky spectrometers: An evaluation of errors in air-mass factors calculated by radiative transfer models , 1995 .

[18]  J. Burrows,et al.  Intercomparison of BrO measurements from ERS-2 GOME, ground-based and balloon platforms , 2002 .

[19]  Stanley C. Solomon,et al.  On the evaluation of air mass factors for atmospheric near‐ultraviolet and visible absorption spectroscopy , 1993 .

[20]  Clive D Rodgers,et al.  Inverse Methods for Atmospheric Sounding: Theory and Practice , 2000 .

[21]  M. Sigrist.  Air monitoring by spectroscopic techniques , 1994 .

[22]  J. Noxon,et al.  Nitrogen Dioxide in the Stratosphere and Troposphere Measured by Ground-Based Absorption Spectroscopy , 1975, Science.

[23]  Stanley C. Solomon,et al.  On the interpretation of zenith sky absorption measurements , 1987 .

[24]  Stefan Noel,et al.  Global atmospheric monitoring with SCIAMACHY , 1999 .

[25]  Gottfried Schwarz,et al.  Trace Gas Retrieval Including Horizontal Gradients , 2002 .

[26]  S. Sander,et al.  Detection of tropospheric ozone by remote sensing from the ground , 1997 .

[27]  Klaus Pfeilsticker,et al.  Analysis for BrO in zenith‐sky spectra: An intercomparison exercise for analysis improvement , 2002 .

[28]  Roderic L. Jones,et al.  Comparison of measurements and model calculations of stratospheric bromine monoxide , 2002 .