retrievals of stratospheric ozone density profiles from odin/osiris limb-scatter measurements
DESCRIPTION
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, - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/1.jpg)
Retrievals of Stratospheric Retrievals of Stratospheric Ozone Density Profiles from Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Odin/OSIRIS Limb-Scatter
MeasurementsMeasurements
C.S. HaleyC.S. HaleyYork UniversityYork University
S.V. PetelinaS.V. PetelinaUniversity of SaskatchewanUniversity of Saskatchewan
and the OSIRIS Teamand the OSIRIS Team
![Page 2: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/2.jpg)
Step 1: Normalization of limb radiance profiles
ref
iin THλ,I
THλ,ITHλ,I 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
inin
iniC
THnm,672lnITHnm,532lnI21
exp
THnm,602ITHy
Method
![Page 3: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/3.jpg)
OS Limb Scan
![Page 4: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/4.jpg)
xn+1 = x0 + SxKnT[KnSxKn
T + S] -1 (y - yn - Kn(x0-xn))
S = Sx - SxKT[KSxKT + S]-1 KSx
x0: ln of a priori O3 profile xn: ln of nth estimatey: ln of measured Chappuis retrieval vectoryn: ln of modelled Chappuis retrieval vector for xn
Sx: covariance matrix of a priori S: covariance matrix of measurement yK: Weighting function matrix
dunperturbeperturbed
dunperturbeperturbed
n3n3
mcmcmn
zOlnzOln
THlnyTHlnyK
Optimal Estimation
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.
![Page 5: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/5.jpg)
OS and TOMS ozone column daily maps
25 February 2002
![Page 6: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/6.jpg)
OS – POAM ComparisonsOS – POAM Comparisons
![Page 7: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/7.jpg)
OS – POAM ComparisonsOS – POAM Comparisons
![Page 8: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/8.jpg)
OS – POAM ComparisonsOS – POAM ComparisonsNovember 2001
![Page 9: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/9.jpg)
OS – POAM ComparisonsOS – POAM ComparisonsFebruary 2002
![Page 10: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/10.jpg)
OS – POAM ComparisonsOS – POAM ComparisonsDecember 2001
![Page 11: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/11.jpg)
OS – POAM ComparisonsOS – POAM ComparisonsJune 2002
![Page 12: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/12.jpg)
OS-SAGE ComparisonsOS-SAGE ComparisonsNovember 2001
![Page 13: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/13.jpg)
OS-SAGE ComparisonsOS-SAGE ComparisonsFebruary 2002
![Page 14: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/14.jpg)
OS-SAGE ComparisonsOS-SAGE ComparisonsJune 2002
![Page 15: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/15.jpg)
OS-SAGE ComparisonsOS-SAGE ComparisonsJuly 2002
![Page 16: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/16.jpg)
OS-sonde ComparisonsOS-sonde Comparisons
![Page 17: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/17.jpg)
OS-sonde ComparisonsOS-sonde Comparisons
![Page 18: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/18.jpg)
Ozone hole split in September 2002
![Page 19: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/19.jpg)
Ozone hole split in September 2002
![Page 20: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/20.jpg)
Ozone hole split in September 2002
![Page 21: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/21.jpg)
Ozone hole split in September 2002
![Page 22: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/22.jpg)
Ozone hole split in September 2002
![Page 23: Retrievals of Stratospheric Ozone Density Profiles from Odin/OSIRIS Limb-Scatter Measurements](https://reader030.vdocuments.site/reader030/viewer/2022033105/568144c1550346895db18bc5/html5/thumbnails/23.jpg)
Future WorkFuture Work
• 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