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| Titel |
Central Arctic Ocean freshwater during a period of anomalous melt and advection in 2015 |
| VerfasserIn |
Benjamin Rabe, Meri Korhonen, Mario Hoppmann, Robert Ricker, Stefan Hendricks, Thomas Krumpen, Justin Beckers, Ursula Schauer |
| 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 |
250132048
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| Publikation (Nr.) |
 EGU/EGU2016-12513.pdf |
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| Zusammenfassung |
| During the recent decade the Arctic Ocean has shown several years of very low sea-ice extent
and an increase in liquid freshwater. Yet, the processes underlying the interannual variability
are still not fully understood.
Hydrographic observations by ship campaigns and autonomous platforms reveal that
summer 2015 showed above average liquid freshwater in the upper ocean of the central
Arctic. Surface temperatures and sea level pressure were also higher than the average of the
preceeding two decades.
From hydrographic observations and atmospheric reanalysis data we show that this liquid
freshwater anomaly is associated with above average sea-ice melt and intensified northward
Ekman transport. We, further, found significant amounts of Pacific Water in the upper water
column, from the mixed-layer to the upper halocline. Our results suggest that the
freshening was due to both advection of low-salinity water from the direction of the
Siberian shelves, the Beaufort Gyre and the Bering Strait, and enhance sea-ice
melt. |
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