For Brewer Umkehr measurements please see the NEUBrew web page

01/01/2014/

NEUBrew Brewer Umkehr data - find interactive display for Daily Ozone Vertical Profiles and Umkehr N-Values

04/06/2008

The PC based version of the ozone profile retrieval from Brewer Umkehr measurements O3BUmkehr (by Martin Stanek) is available for free installation at http://www.o3soft.eu/o3bumkehr.html

Information about updated Umkehr ozone profile retrieval algorithm UMK04

Download algorithm paper in PDF format.

What is new:

1. New a priori ozone information:
   

   Readme file

   Data

   • based on updated ozone climatology by NASA/Goddard (private communication with G. Labow )
   • higher spatial resolution (10-degree latitude bins, 14 bins from 70 S to 70 N)
   • only seasonal cycle, does not depend on total ozone


2. Updated forward model (readme file)
   
   • new standard ozone profiles, representative of typical ozone distribution at low, middle, and high latitudes (the same as in SBUV V8 algorithm)
   • tabulated multiple-scattering correction for N-values
   • tabulated refraction correction for N-values
   • tabulated multiple-scattering correction for Jacobian
   • tabulated data of spectrally resolved extra-terrestrial solar flux (SUSIM satellite data), C-pair Dobson slit functions, ozone absorption (Bass-Paur temperature dependent fit), and Rayleigh scattering coefficients

   coef_dobacdl.txt

   coef_dobacdh.txt



3. Updated inverse model
   
   • ozone profile retrieval in 61-layers (vertical layer resolution is a quarter of the standard Umkehr layer)
   • Rodgers a priori covariance matrix
   • Solar Zenith Angle dependent error covariance matrix
   • linear in ozone retrieval

Data Evaluation and Validation

• UMK04 retrieved ozone profile time series
  

  readme file

  Data:

  Haute Provence

  Boulder

  Lauder

Reference for 1992 Umkehr retrieval

• UMK92 (ca. 1992) retrieved ozone profile time series
  

  readme file

  Data:

  Arosa

  Boulder

  Tateno

• A priori data for UMK92 (ca. 1992) retrievals
  

  readme file

  Data:

  Arosa

  Boulder

  Tateno

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irina.petro@noaa.gov