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| Miles, Martin W.; Divine, Dmitry V.; Furevik, Tore; Jansen, Eystein; Moros, Matthias; Ogilvie, Astrid E. J.. |
| Satellite data suggest an Arctic sea ice-climate system in rapid transformation, yet its long-term natural modes of variability are poorly known. Here we integrate and synthesize a set of multicentury historical records of Atlantic Arctic sea ice, supplemented with high-resolution paleoproxy records, each reflecting primarily winter/spring sea ice conditions. We establish a signal of pervasive and persistent multidecadal (~60–90 year) fluctuations that is most pronounced in the Greenland Sea and weakens further away. Covariability between sea ice and Atlantic multidecadal variability as represented by the Atlantic Multidecadal Oscillation (AMO) index is evident during the instrumental record, including an abrupt change at the onset of the early twentieth... |
| Tipo: Text |
Palavras-chave: Sea ice. |
| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00291/40199/39229.pdf |
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| Risebrobakken, Bjorg; Dokken, Trond; Smedsrud, Lars Henrik; Andersson, Carin; Jansen, Eystein; Moros, Matthias; Ivanova, Elena V.. |
| The separate roles of oceanic heat advection and orbital forcing on influencing early Holocene temperature variability in the eastern Nordic Seas is investigated. The effect of changing orbital forcing on the ocean temperatures is tested using the 1DICE model, and the 1DICE results are compared with new and previously published temperature reconstructions from a transect of five cores located underneath the pathway of Atlantic water, from the Faroe-Shetland Channel in the south to the Barents Sea in the north. The stronger early Holocene summer insolation at high northern latitudes increased the summer mixed layer temperatures, however, ocean temperatures underneath the summer mixed layer did not increase significantly. The absolute maximum in summer mixed... |
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| Ano: 2011 |
URL: https://archimer.ifremer.fr/doc/00227/33800/32547.pdf |
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| Sildever, Sirje; Ribeiro, Sofia; Mertens, Kenneth; Andersen, Thorbjørn Joest; Moros, Matthias; Kuijpers, Antoon. |
| We present a record of dinoflagellate cyst assemblage composition, abundance, and morphology from the central Baltic Sea, spanning from the late 19th to the early 21st century. Environmental time-series were analyzed in relation to changes in community structure and diversity as inferred from the sediment record, and average summer sea surface salinity (SSS) was reconstructed based on the average process length of Protoceratium reticulatum resting cysts. The reconstructed summer SSS was compared to instrumental data for a critical evaluation of this approach. The most abundant species in this record were P. reticulatum and Biecheleria baltica, and on average ten taxa were identified per sample. The cyst record of B. baltica indicated that although this... |
| Tipo: Text |
Palavras-chave: Baltic Sea; Biecheleria baltica; Dinoflagellate cysts; Environmental change; Protoceratium reticulatum; Sea-surface salinity; Sediment core records. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00481/59300/61994.pdf |
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