Download - Fit parameters and results Influence of wavelength range & reference spectrum First results
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Bremen Limb Workshop [email protected] Satellite group http://giger.uni-heidelberg.de
First Heidelberg SCIA Limb Results
Thomas Wagner, S. Beirle, C. Frankenberg, C. v. Friedeburg, M. Grzegorski, J. Hollwedel, S. Kühl, M. F. A. Khokhar, S. Kraus, S.
Shangavi, W. Wilms-Grabe, M. Wenig, U. Platt
Institut für Umweltphysik, University of Heidelberg, Germany
Fit parameters and results
Influence of wavelength range & reference spectrum
First results
Conclusions & outlook
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Bremen Limb Workshop [email protected] Satellite group http://giger.uni-heidelberg.de
Reference Spectra:
O3: Bogumil et al., 223 & 243 KNO2: Vandaele et al., 220 KBrO: Wilmouth et al., 228 KOClO: Krominga et al., 213 KRing: Calculated (MFC)Polarisation: Ln(Xi) & Ln(Eta) from SCIA KeydataPolynomial: Degree 5Fraunhofer: One Limb Spectrum per orbit
(at lowest tangent height)
Shift: Spectrum shifted against Fraunhofer reference(linked to trace gas cross sections)
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Bremen Limb Workshop [email protected] Satellite group http://giger.uni-heidelberg.de
-0.045-0.04
-0.035-0.03
-0.025-0.02
-0.015-0.01
-0.0050
0.005
337 339 341 343 345 347 349 351 353 355 357
0.002
0.003
0.004
0.005
0.006
0.007
337 339 341 343 345 347 349 351 353 355 357
-0.008
-0.007
-0.006
-0.005
-0.004
-0.003
-0.002
337 339 341 343 345 347 349 351 353 355 357
-2.00E-03
-1.50E-03
-1.00E-03
-5.00E-04
0.00E+00
5.00E-04
1.00E-03
1.50E-03
337 339 341 343 345 347 349 351 353 355 357
NO2
BrO
O3
Ring
NO2 Analysis
of limb spectrum
at 26.5 km
with respect to
–2.5 km
tangent height
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Bremen Limb Workshop [email protected] Satellite group http://giger.uni-heidelberg.de
NO2 Analysis
of limb spectrum
at 26.5 km
with respect to
–2.5 km
tangent height
0.006
0.007
0.008
0.009
0.01
0.011
0.012
337 339 341 343 345 347 349 351 353 355 357
-0.08
-0.07
-0.06
-0.05
-0.04
-0.03
-0.02
337 339 341 343 345 347 349 351 353 355 357
Eta
Xi
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Bremen Limb Workshop [email protected] Satellite group http://giger.uni-heidelberg.de
-5.E+16
0.E+00
5.E+16
1.E+17
2.E+17
-10 0 10 20 30 40 50 60
NO2 Profiles along SCIA Orbit 4615
(DSCDs as function of tangent hight)
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Bremen Limb Workshop [email protected] Satellite group http://giger.uni-heidelberg.de
Comparison for NO2 analysis with limb or direct sun reference
Limb reference
Direct sun reference
-5.0E+16
0.0E+00
5.0E+16
1.0E+17
-10 0 10 20 30 40 50
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Bremen Limb Workshop [email protected] Satellite group http://giger.uni-heidelberg.de
0
0.02
0.04
0.06
0.08
-10 0 10 20 30 40 50
Sh
ift
[pix
el]
Direct sun reference
Limb reference
Spectral shift during a limb scan
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Bremen Limb Workshop [email protected] Satellite group http://giger.uni-heidelberg.de
-0.0025
-0.002
-0.0015
-0.001
-0.0005
0
0.0005
0.001
337 339 341 343 345 347 349 351 353 355 357
BrO Analysis
of limb spectrum
at 23.3 km
with respect to
26.5 km
tangent height
-0.001
-0.0005
0
0.0005
0.001
0.0015
0.002
337 339 341 343 345 347 349 351 353 355 357
-0.06
-0.05
-0.04
-0.03
-0.02
-0.01
0
0.01
337 339 341 343 345 347 349 351 353 355 357
-0.002
-0.0015
-0.001
-0.0005
0
0.0005
0.001
337 339 341 343 345 347 349 351 353 355 357
BrO
NO2
O3
Ring
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Bremen Limb Workshop [email protected] Satellite group http://giger.uni-heidelberg.de
BrO Analysis
of limb spectrum
at 23.3 km
with respect to
26.5 km
tangent height0.001
0.0015
0.002
0.0025
0.003
0.0035
0.004
337 339 341 343 345 347 349 351 353 355 357
-0.025
-0.02
-0.015
-0.01
-0.005
0
337 339 341 343 345 347 349 351 353 355 357
Xi
Eta
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Bremen Limb Workshop [email protected] Satellite group http://giger.uni-heidelberg.de
-0.0025
-0.002
-0.0015
-0.001
-0.0005
0
0.0005
0.001
337 339 341 343 345 347 349 351 353 355 357
-0.003-0.0025
-0.002-0.0015
-0.001-0.0005
00.0005
337 342 347 352 357
-0.002
-0.0015
-0.001
-0.0005
0
0.0005
337 342 347 352 357
-1.00E-03
-5.00E-04
0.00E+00
5.00E-04
1.00E-03
337 342 347 352 357
BrO Analysis in different spectral ranges
1.03e14
1.21e14
0.44e14
1.86e14
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Bremen Limb Workshop [email protected] Satellite group http://giger.uni-heidelberg.de
-2.0E+14
-1.0E+14
0.0E+00
1.0E+14
-5 5 15 25 35 45
Reihe1
Reihe2
Reihe3
Reihe4
-1.00E-03
-5.00E-04
0.00E+00
5.00E-04
1.00E-03
337 342 347 352 357
-0.003-0.0025
-0.002-0.0015
-0.001-0.0005
00.0005
337 342 347 352 357
-0.002
-0.0015
-0.001
-0.0005
0
0.0005
337 342 347 352 357
-0.0025
-0.002
-0.0015
-0.001
-0.0005
0
0.0005
0.001
337 339 341 343 345 347 349 351 353 355 357
BrO DSCD for different wavelength ranges
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Bremen Limb Workshop [email protected] Satellite group http://giger.uni-heidelberg.de
-4.0E+14
-2.0E+14
0.0E+00
2.0E+14
4.0E+14
6.0E+14
-10 0 10 20 30 40 50
Comparison for BrO analysis with limb or direct sun reference
Direct sun reference
Limb reference
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Bremen Limb Workshop [email protected] Satellite group http://giger.uni-heidelberg.de
-1.0E+20
-5.0E+19
0.0E+00
5.0E+19
1.0E+20
1.5E+20
-10 0 10 20 30 40 50 60
Comparison for O3 analysis with limb or direct sun reference
Direct sun reference
Limb reference
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Bremen Limb Workshop [email protected] Satellite group http://giger.uni-heidelberg.de
-4.0E+14
-2.0E+14
0.0E+00
2.0E+14
-10 0 10 20 30 40 50
-5.E+16
0.E+00
5.E+16
-10 0 10 20 30 40 50
-1.0E+20
-5.0E+19
0.0E+00
5.0E+19
-10 0 10 20 30 40 50
Comparison of profile heights BrO
NO2
O3
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Bremen Limb Workshop [email protected] Satellite group http://giger.uni-heidelberg.de
Latitude
O3 SCD as function of latitude and tangent height
(orbit 6415, 17.01.2003)
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Bremen Limb Workshop [email protected] Satellite group http://giger.uni-heidelberg.de
Latitude
NO2 SCD as function of latitude and tangent height
(orbit 6415, 17.01.2003)
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Bremen Limb Workshop [email protected] Satellite group http://giger.uni-heidelberg.de
Latitude
BrO SCD as function of latitude and tangent height
(orbit 6415, 17.01.2003)
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Bremen Limb Workshop [email protected] Satellite group http://giger.uni-heidelberg.de
Conclusions & Outlook
• Development of limb UV analysis of BrO, NO2 and O3
• Polarisation sensitivity complicates DOAS fit
• Broad spectral range (337 – 357 nm) seems to give
most reliable (stable) results
• Dependence on altitude & latitude seems to be reasonable
• Determination of absolute SCDs (choice of Fraunh. reference)
• Further trace gases (OClO) and wavelength ranges (vis)
• Application of radiative transport and profile inversion