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Journal of geophysical research, 109, D06305. 01/2004;
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ABSTRACT: The spectrometer SCIAMACHY aboard ENVISAT provides two near infrared
channels with moderate spectral resolution. Through an iterative DOAS
technique the vertical column amounts of greenhouse gases like CH_4 or
CO_2 can be retrieved. In this work the potential and first results of
the latest SCIAMACHY data-products are discussed. The results are also
compared to measurements in Kiruna and Ny Alesun performed by the
SCIAMACHY validation team. First preliminary investigations exhibit
scientifically reasonable results and underline the potential of
SCIAMACHY with respect to the global monitoring of greenhouse gases.
03/2003; -1:6109.
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S Kühl,
W Wilms-Grabe,
S Beirle,
C Frankenberg,
M Grzegorski, J Hollwedel,
F Khokhar,
S Kraus,
U Platt,
S Sanghavi,
C von Friedeburg,
T Wagner
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ABSTRACT: In this article, we present satellite observations of OClO from the years 1995–2002. The focus is on observations of OClO in the Arctic wintertime stratosphere, which are compared to results of the SLIMCAT model and to observations in the Antarctic. In particular, we investigated the beginning and ending of the chlorine activation in the Arctic stratosphere. The Slant Column Densities (SCDs) of OClO increase significantly, when the temperature falls below the threshold for formation of Polar Stratospheric Clouds. The time for decrease of the OClO-SCDs in the deactivation phase (early spring) varies strongly and is related to the degree of denitrification. In the Arctic, chlorine activation can be further increased when there is strong activity of stratospheric mountain waves.
Advances in Space Research.
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J. Pukite,
S. Kühl,
W. Wilms-Grabe,
C. von Friedeburg,
T. Deutschmann,
S. Sanghavi, J. Hollwedel,
S. Beirle,
C. Frankenberg,
M. F. Khokhar,
M. Grzegorski,
T. Marbach,
B. Kirchhof,
S. Kraus,
U. Platt,
T Wagner
Leal-Filho, W.; Ubelis, A.; Berzina, D.: Sustainable development in the Baltic and beyond, Lang, 493-502 (2006).
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ABSTRACT: In this paper we present data on the variation of tropospheric BrO, that is connected with the spring time ozone depletion in polar regions. For this study we use data derived from the Global Ozone Monitoring Experiment (GOME) for the years 1996–2001. We especially focus on the possible detection of trends in the extent of coverage of polar regions by BrO and on the time series of BrO abundances. For this purpose we calculated monthly means during polar spring of the areas that are covered with BrO exceeding certain thresholds. It turns out that in the timeseries of total, i.e. tropospheric and stratospheric, BrO column densities there is, up to now, no clear trend identifiable. In contrast, the analysis of areas covered by high concentrations of tropospheric BrO (columns >5.5 × 1013 molecules/cm2) is considerably expanding (about 10% per year during 1996–2000) in the northern hemisphere in the comparison of monthly means during polar spring, which is possibly due to an anthropogenic effect on the climate system.
Advances in Space Research.
