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| Titel |
Satellite observations and EMAC model calculations of sulfate aerosols from Kilauea: a study of aerosol formation, processing, and loss |
| VerfasserIn |
Marloes Penning de Vries, Steffen Beirle, Christoph Brühl, Steffen Dörner, Andrea Pozzer, Thomas Wagner |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250129327
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| Publikation (Nr.) |
 EGU/EGU2016-9422.pdf |
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| Zusammenfassung |
| The currently most active volcano on Earth is Mount Kilauea on Hawaii, as it has been in a
state of continuous eruption since 1983. The opening of a new vent in March 2008 caused
half a year of strongly increased SO2 emissions, which in turn led to the formation of a
sulfate plume with an extent of at least two thousand kilometers. The plume could be clearly
identified from satellite measurements from March to November, 2008. The steady trade
winds in the region and the lack of interfering sources allowed us to determine the life time of
SO2 from Kilauea using only satellite-based measurements (no a priori or model
information). The current investigation focuses on sulfate aerosols: their formation,
processing and subsequent loss. Using space-based aerosol measurements by MODIS, we
study the evolution of aerosol optical depth, which first increases as a function of distance
from the volcano due to aerosol formation from SO2 oxidation, and subsequently
decreases as aerosols are deposited to the surface. The outcome is compared to results
from calculations using the EMAC (ECHAM/MESSy Atmospheric Chemistry)
model to test the state of understanding of the sulfate aerosol life cycle. For this
comparison, a particular focus is on the role of clouds and wet removal processes. |
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