Retrievals of stratospheric ozone density profiles from odin osiris limb scatter measurements
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Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements. C.S. Haley York University S.V. Petelina University of Saskatchewan and the OSIRIS Team. Method. Step 1: Normalization of limb radiance profiles. with TH i being the i th tangent height,

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Retrievals of stratospheric ozone density profiles from odin osiris limb scatter measurements

Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements

C.S. Haley

York University

S.V. Petelina

University of Saskatchewan

and the OSIRIS Team


Method Odin/OSIRIS Limb-Scatter Measurements

Step 1: Normalization of limb radiance profiles

with THi being the ith tangent height,

THref reference tangent height

Reduction of the impact of albedo on limb radiance profiles

Step 2: Combination of wavelengths

  • Employ the Chappuis absorption bands of O3,

  • and define the Chappuis retrieval vector yC(TH) by


OS Limb Scan Odin/OSIRIS Limb-Scatter Measurements


Optimal Estimation Odin/OSIRIS Limb-Scatter Measurements

xn+1 = x0 + SxKnT[KnSxKnT + S] -1 (y - yn - Kn(x0-xn))

S = Sx - SxKT[KSxKT + S]-1KSx

x0: ln of a priori O3 profile

xn: ln of nth estimate

y: ln of measured Chappuis retrieval vector

yn: ln of modelled Chappuis retrieval vector for xn

Sx: covariance matrix of a priori

S: covariance matrix of measurement y

K: Weighting function matrix

  • Forward model is LIMBTRAN [Griffioen and Oikarinen, 2000]

  • Pseudo-spherical: SS treated in spherical shell atmosphere

  • Diffuse radiance source functions calculated in 1-D plane

  • parallel atmosphere applying the finite differences method.

  • Variation of SZA and  along LOS.


Os and toms ozone column daily maps 25 february 2002
OS and TOMS ozone column daily maps Odin/OSIRIS Limb-Scatter Measurements25 February 2002


Os poam comparisons
OS – POAM Comparisons Odin/OSIRIS Limb-Scatter Measurements


Os poam comparisons1
OS – POAM Comparisons Odin/OSIRIS Limb-Scatter Measurements


Os poam comparisons november 2001
OS – POAM Comparisons Odin/OSIRIS Limb-Scatter MeasurementsNovember 2001


Os poam comparisons february 2002
OS – POAM Comparisons Odin/OSIRIS Limb-Scatter MeasurementsFebruary 2002


Os poam comparisons december 2001
OS – POAM Comparisons Odin/OSIRIS Limb-Scatter MeasurementsDecember 2001


Os poam comparisons june 2002
OS – POAM Comparisons Odin/OSIRIS Limb-Scatter MeasurementsJune 2002


Os sage comparisons november 2001
OS-SAGE Comparisons Odin/OSIRIS Limb-Scatter MeasurementsNovember 2001


Os sage comparisons february 2002
OS-SAGE Comparisons Odin/OSIRIS Limb-Scatter MeasurementsFebruary 2002


Os sage comparisons june 2002
OS-SAGE Comparisons Odin/OSIRIS Limb-Scatter MeasurementsJune 2002


Os sage comparisons july 2002
OS-SAGE Comparisons Odin/OSIRIS Limb-Scatter MeasurementsJuly 2002


Os sonde comparisons
OS-sonde Comparisons Odin/OSIRIS Limb-Scatter Measurements


Os sonde comparisons1
OS-sonde Comparisons Odin/OSIRIS Limb-Scatter Measurements


Ozone hole split in september 2002
Ozone hole split in September 2002 Odin/OSIRIS Limb-Scatter Measurements


Ozone hole split in september 20021
Ozone hole split in September 2002 Odin/OSIRIS Limb-Scatter Measurements


Ozone hole split in september 20022
Ozone hole split in September 2002 Odin/OSIRIS Limb-Scatter Measurements


Ozone hole split in september 20023
Ozone hole split in September 2002 Odin/OSIRIS Limb-Scatter Measurements


Ozone hole split in september 20024
Ozone hole split in September 2002 Odin/OSIRIS Limb-Scatter Measurements


Future work
Future Work Odin/OSIRIS Limb-Scatter Measurements

  • Good agreement between OSIRIS, POAM III & SAGE II

  • Data is now being used in some preliminary assimilation studies and to evaluate other retrieval methods (DOAS, BIN, MOP)

  • Apparent tangent height registration issues that need to be addressed

  • Addition of UV wavelengths required to improve upper stratosphere retrievals – in progress


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