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| Titel |
The Eyjafjöll explosive volcanic eruption from a microwave weather radar perspective |
| VerfasserIn |
F. S. Marzano, M. Lamantea, M. Montopoli, S. Fabio, E. Picciotti |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 11, no. 18 ; Nr. 11, no. 18 (2011-09-16), S.9503-9518 |
| Datensatznummer |
250010076
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| Publikation (Nr.) |
 copernicus.org/acp-11-9503-2011.pdf |
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| Zusammenfassung |
| The sub-glacial Eyjafjöll explosive volcanic eruptions of April and May
2010 are analyzed and quantitatively interpreted by using ground-based
weather radar data and the Volcanic Ash Radar Retrieval (VARR) technique.
The Eyjafjöll eruptions have been continuously monitored by the
Keflavík C-band weather radar, located at a distance of about 155 km
from the volcano vent. Considering that the Eyjafjöll volcano is
approximately 20 km from the Atlantic Ocean and that the northerly winds
stretched the plume toward the mainland Europe, weather radars are the only
means to provide an estimate of the total ejected tephra. The VARR
methodology is summarized and applied to available radar time series to
estimate the plume maximum height, ash particle category, ash volume, ash
fallout and ash concentration every 5 min near the vent. Estimates of
the discharge rate of eruption, based on the retrieved ash plume top height,
are provided together with an evaluation of the total erupted mass and
volume. Deposited ash at ground is also retrieved from radar data by
empirically reconstructing the vertical profile of radar reflectivity and
estimating the near-surface ash fallout. Radar-based retrieval results
cannot be compared with ground measurements, due to the lack of the latter,
but further demonstrate the unique contribution of these remote sensing
products to the understating and modelling of explosive volcanic ash
eruptions. |
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