Algorithm for the estimation of vertical ozone profiles from the backscattered ultraviolet technique

Abstract. A new method is presented to determine vertical ozone profiles from measurements of spectral global (direct Sun plus upper hemisphere) irradiance in the ultraviolet. The method is similar to the widely used Umkehr technique, which inverts measurements of zenith sky radiance. The procedure was applied to measurements of a high-resolution spectroradiometer installed near the centre of the Greenland ice sheet. Retrieved profiles were validated with balloon-sonde observations and ozone profiles from the space-borne Microwave Limb Sounder (MLS). Depending on altitude, the bias between retrieval results presented in this paper and MLS observations ranges between −5 and +3 %. The magnitude of this bias is comparable, if not smaller, to values reported in the literature for the standard Dobson Umkehr method. Total ozone columns (TOCs) calculated from the retrieved profiles agree to within 0.7±2.0 % (±1σ) with TOCs measured by the Ozone Monitoring Instrument on board the Aura satellite. The new method is called the Global-Umkehr method.

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Bias determination and precision validation of ozone profiles from MIPAS-Envisat retrieved with the IMK-IAA processor

Atmospheric Chemistry and Physics ◽

10.5194/acp-7-3639-2007 ◽

2007 ◽

Vol 7 (13) ◽

pp. 3639-3662 ◽

Cited By ~ 42

Author(s):

T. Steck ◽

T. von Clarmann ◽

H. Fischer ◽

B. Funke ◽

N. Glatthor ◽

...

Keyword(s):

Stratospheric Ozone ◽

Michelson Interferometer ◽

High Spectral Resolution ◽

Vapor Concentration ◽

Atmospheric Sounding ◽

Mean Differences ◽

Microwave Radiometers ◽

Vertical Ozone ◽

Vertical Ozone Profiles ◽

Polar Ozone

Abstract. This paper characterizes vertical ozone profiles retrieved with the IMK-IAA (Institute for Meteorology and Climate Research, Karlsruhe – Instituto de Astrofisica de Andalucia) science-oriented processor from high spectral resolution data (until March 2004) measured by the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) aboard the environmental satellite Envisat. Bias determination and precision validation is performed on the basis of correlative measurements by ground-based lidars, Fourier transform infrared spectrometers, and microwave radiometers as well as balloon-borne ozonesondes, the balloon-borne version of MIPAS, and two satellite instruments (Halogen Occultation Experiment and Polar Ozone and Aerosol Measurement III). Percentage mean differences between MIPAS and the comparison instruments for stratospheric ozone are generally within ±10%. The precision in this altitude region is estimated at values between 5 and 10% which gives an accuracy of 15 to 20%. Below 18 km, the spread of the percentage mean differences is larger and the precision degrades to values of more than 20% depending on altitude and latitude. The main reason for the degraded precision at low altitudes is attributed to undetected thin clouds which affect MIPAS retrievals, and to the influence of uncertainties in the water vapor concentration.

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On the correspondence between Standard Umkehr, Short Umkehr, and solar backscattered ultraviolet vertical ozone profiles

Journal of Geophysical Research Atmospheres ◽

10.1029/jd090id02p03845 ◽

1985 ◽

Vol 90 (D2) ◽

pp. 3845 ◽

Cited By ~ 13

Author(s):

John J. DeLuisi ◽

Carlton L. Mateer ◽

P. K. Bhartia

Keyword(s):

Vertical Ozone ◽

Vertical Ozone Profiles

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Retrieving Vertical Ozone Profiles from Measurements of Global Spectral Irradiance

10.5194/amt-2017-179 ◽

2017 ◽

Author(s):

Germar Bernhard ◽

Irina Petropavlovskikh ◽

Bernhard Mayer

Keyword(s):

High Resolution ◽

Total Ozone ◽

Greenland Ice Sheet ◽

Spectral Irradiance ◽

New Method ◽

Ozone Monitoring Instrument ◽

Monitoring Instrument ◽

Ozone Monitoring ◽

Vertical Ozone ◽

Vertical Ozone Profiles

Abstract. A new method is presented to determine vertical ozone profiles from measurements of spectral global (direct Sun plus upper hemisphere) irradiance in the UV. The method is similar to the widely used Umkehr technique, which inverts measurements of zenith sky radiance. The procedure was applied to measurements of a high-resolution spectroradiometer installed near the centre of the Greenland ice sheet. Retrieved profiles were validated with balloon sonde observations and ozone profiles from the space-borne Microwave Limb Sounder (MLS). Depending on altitude, the bias between retrieval results presented in this paper and MLS observations ranges between −5 % and +3 %. The magnitude of this bias is comparable, if not smaller, to values reported in the literature for the standard Dobson Umkehr method. Total ozone columns (TOCs) calculated from the retrieved profiles agree to within 0.7 ± 2.0 % (±1σ) with TOCs measured by the Ozone Monitoring Instrument (OMI) onboard the Aura satellite. The new method is called the “Global-Umkehr” method.

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An Estimate of the Vertical Ozone Profile Discrepancy between the Australian Brewer–Mast and Electrochemical Concentration Cell Ozonesondes

Journal of Atmospheric and Oceanic Technology ◽

10.1175/jtech1821.1 ◽

2005 ◽

Vol 22 (12) ◽

pp. 1864-1874 ◽

Cited By ~ 7

Author(s):

Paul Lehmann

Keyword(s):

Tropospheric Ozone ◽

Stratospheric Aerosol ◽

Profile Data ◽

Concentration Cell ◽

Ozone Profile ◽

Additive Correction ◽

Vertical Ozone Profile ◽

Vertical Ozone ◽

Vertical Ozone Profiles ◽

Ozone Levels

Abstract An analysis is described that provides an additive correction for referencing the vertical ozone profiles of the Australian Brewer–Mast (BM; October 1984–December 1990) ozonesonde to those of the electrochemical concentration cell (ECC; January 1991–December 1999) using approximately coincident Stratospheric Aerosol and Gas Experiment (SAGE) II satellite ozone profile data. Because Australian BM ozonesondes may have been prepared differently from BM ozonesondes elsewhere, other results of intercomparisons between the two different ozonesonde types cannot be used. However, the present results are consistent with previously reported intercomparison studies between these two ozonesonde types, where the lowest altitude tropospheric ozone levels measured by the BM ozonesonde were approximately 25% lower than the values measured by the ECC ozonesonde. The magnitudes of the BM corrections were found to be generally less than about 0.5 mPa in partial pressure up to an altitude of approximately 28 km. Without direct intercomparison measurements, the corrections given here provide the only means of removing the discontinuity in the Melbourne ozonesonde dataset that occurred when ECC ozonesondes replaced the BM ozonesondes in 1991.

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