Retrievals of stratospheric ozone density profiles from odin osiris limb scatter measurements
Download
1 / 23

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


  • 133 Views
  • Uploaded on

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,

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements' - shiela


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
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


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

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


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

OS Limb Scan Odin/OSIRIS Limb-Scatter Measurements


Retrievals of stratospheric ozone density profiles from 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