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high latitude ozone sonde stations are used to evaluate the limb ozone products
before (V2.9) and after (V3.0) this optimization. While the veri
cation of V2.9 limb
data reveals systematic underestimation of SPO, the V3.0 limb data shows sig-
ni
cantly better agreement with ozone sonde data, e.g. the relative difference at
Eureka (80.09
5
DU for V3.0. The comparisons for all six northern high latitude locations indicate
good agreement between SCIAMACHY limb ozone V3.0 and ozone sonde data
with a high correlation coef
°
N, 85.94
°
W) improved from
19 DU for SCIAMACHY V2.9 to
−
−
cient R = 0.94. The global validation of SCIAMACHY
stratospheric ozone columns of V3.0 is ongoing.
Acknowledgments We thank WOUDC (
http://woudc.org
)
for providing ozone sonde station
data. JJ also wants to thank CSC (China Scholarship Council) and ESSReS (Earth System Science
Research School) for supporting during the project study. This work has been funded in parts by
the German Aerospace DLR project SADOS (FKZ 50EE1105) and by the University and State of
Bremen.
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