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| Titel |
First laboratory study of air-sea gas exchange at hurricane wind speeds |
| VerfasserIn |
K. E. Krall, B. Jähne |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 10, no. 2 ; Nr. 10, no. 2 (2014-04-23), S.257-265 |
| Datensatznummer |
250116969
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| Publikation (Nr.) |
 copernicus.org/os-10-257-2014.pdf |
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| Zusammenfassung |
| In a pilot study conducted in October and November 2011, air–sea gas
transfer velocities of the two sparingly soluble trace gases
hexafluorobenzene and 1,4-difluorobenzene were measured in the unique
high-speed wind-wave tank at Kyoto University, Japan. This air–sea
interaction facility is capable of producing hurricane strength wind speeds
of up to u10 =67 m s−1. This constitutes the first lab study
of gas transfer at such high wind speeds. The measured transfer velocities
k600 spanned two orders of magnitude, lying between
11 cm h−1 and 1180 cm h−1 with the latter being the
highest ever measured wind-induced gas transfer velocity. The measured gas
transfer velocities are in agreement with the only available data set at
hurricane wind speeds (McNeil and D'Asaro, 2007). The disproportionately
large increase of the transfer velocities found at highest wind speeds
indicates a new regime of air–sea gas transfer, which is characterized by
strong wave breaking, enhanced turbulence and bubble cloud entrainment. |
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