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| Titel |
Opportunistic validation of sulfur dioxide in the Sarychev Peak volcanic eruption cloud |
| VerfasserIn |
S. A. Carn, T. M. Lopez |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 4, no. 9 ; Nr. 4, no. 9 (2011-09-01), S.1705-1712 |
| Datensatznummer |
250002085
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| Publikation (Nr.) |
 copernicus.org/amt-4-1705-2011.pdf |
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| Zusammenfassung |
| We report attempted validation of Ozone Monitoring Instrument (OMI) sulfur
dioxide (SO2) retrievals in the stratospheric volcanic cloud from
Sarychev Peak (Kurile Islands) in June 2009, through opportunistic
deployment of a ground-based ultraviolet (UV) spectrometer (FLYSPEC) as the
volcanic cloud drifted over central Alaska. The volcanic cloud altitude
(~12–14 km) was constrained using coincident CALIPSO lidar
observations. By invoking some assumptions about the spatial distribution of
SO2, we derive averages of FLYSPEC vertical SO2 columns for
comparison with OMI SO2 measurements. Despite limited data, we find
minimum OMI-FLYSPEC differences within measurement uncertainties, which
support the validity of the operational OMI SO2 algorithm. However, our
analysis also highlights the challenges involved in comparing datasets
representing markedly different spatial and temporal scales. This effort
represents the first attempt to validate SO2 in a stratospheric
volcanic cloud using a mobile ground-based instrument, and demonstrates the
need for a network of rapidly deployable instruments for validation of
space-based volcanic SO2 measurements. |
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