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| Eldevik, Tor; Risebrobakken, Bjorg; Bjune, Anne E.; Andersson, Carin; Birks, H. John B.; Dokken, Trond M.; Drange, Helge; Glessmer, Mirjam S.; Li, Camille; Nilsen, Jan Even O.; Ottera, Odd Helge; Richter, Kristin; Skagseth, Oystein. |
| The understanding of climate and climate change is fundamentally concerned with two things: a well-defined and sufficiently complete climate record to be explained, for example of observed temperature, and a relevant mechanistic framework for making closed and consistent inferences concerning cause-and-effect. This is the case for understanding observed climate, as it is the case for historical climate as reconstructed from proxy data and future climate as projected by models. The present study offers a holistic description of northern maritime climate from the Last Glacial Maximum through to the projected global warming of the 21st century in this context. It includes the compilation of the most complete temperature record for Norway and the Norwegian Sea... |
| Tipo: Text |
Palavras-chave: LGM-to-future North Atlantic; Nordic seas; And Arctic Climate Marine Terrestrial Reconstruction Observations Climate model Temperature Thermohaline circulation. |
| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00289/40031/38847.pdf |
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| Bauch, Henning A.; Erlenkeuser, Helmut. |
| Sediment cores from the Norwegian Sea were studied to evaluate interglacial climate conditions of the marine isotope stage 5e (MIS 5e). Using planktic forminiferal assemblages as the core method, a detailed picture of the evolution of surface water conditions was derived. According to our age model, a step-like deglaciation of the Saalian ice sheets is noted between ca. 135 and 124.5 Kya, but the deglaciation shows little response with regard to surface ocean warming. From then on, the rapidly increasing abundance of subpolar forminifers, concomitant with decreasing iceberg indicators, provides evidence for the development of interglacial conditions sensu stricto (5e-ss), a period that lasted for about 9 Ky. As interpreted from the foraminiferal records,... |
| Tipo: Text |
Palavras-chave: Holocene; Last interglacial; Nordic seas; Palaeoceanography; Planktic foraminifers; Stable isotopes. |
| Ano: 2008 |
URL: https://archimer.ifremer.fr/doc/00237/34811/33316.pdf |
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| Dokken, Trond M.; Nisancioglu, Kerim H.; Li, Camille; Battisti, David S.; Kissel, Catherine. |
| Dansgaard-Oeschger (D-O) cycles are the most dramatic, frequent, and wide-reaching abrupt climate changes in the geologic record. On Greenland, D-O cycles are characterized by an abrupt warming of 105 degrees C from a cold stadial to a warm interstadial phase, followed by gradual cooling before a rapid return to stadial conditions. The mechanisms responsible for these millennial cycles are not fully understood but are widely thought to involve abrupt changes in Atlantic Meridional Overturning Circulation due to freshwater perturbations. Here we present a new, high-resolution multiproxy marine sediment core monitoring changes in the warm Atlantic inflow to the Nordic seas as well as in local sea ice cover and influx of ice-rafted debris. In contrast to... |
| Tipo: Text |
Palavras-chave: D-O cycles; Nordic seas; Marine sediment core; Greenland ice core; Abrupt changes; Sea ice. |
| Ano: 2013 |
URL: https://archimer.ifremer.fr/doc/00264/37490/35779.pdf |
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| Cortese, G; Dolven, Jk; Bjorklund, Kr; Malmgren, Ba. |
| Artificial Neural Networks (ANN) were trained by using an extensive radiolarian census dataset from the Nordic (Greenland, Norwegian, and Iceland) Seas. The regressions between observed and predicted Summer Sea Temperature (SST) indicate that lower error margins and better correlation coefficients are obtained for 100 m (SST100) compared to 10 m (SST10) water depth, and by using a subset of species instead of all species. The trained ANNs were subsequently applied to radiolarian data from two Norwegian Sea cores, HM 79-4 and MD95-2011, for reconstructions of SSTs through the last 15,000 years. The reconstructed SST is quite high during the Bolling-Allerod, when it reaches values only found later during the warmest phase of the Holocene. The climatic... |
| Tipo: Text |
Palavras-chave: Artificial neural networks; Radiolarians; Nordic seas; Late Pleistocene; Holocene. |
| Ano: 2005 |
URL: https://archimer.ifremer.fr/doc/00229/34074/32535.pdf |
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