2 results for late quaternary sediment core
Contributors: Martin Jakobsson, Antony Long, Ólafur Ingólfsson, Kurt H. Kjær, Robert F. Spielhagen
sediment cores from a large spatial area; these are only plotted with ...Late Weichselian (25–15 ka). The speculative extent of an MIS 6 ice shelf... LS: Late Saalian (>140 ka), EW: Early Weichselian (100–80 ka), MW: Middle...cores. Furthermore, Cronin et al. (2010) analyzed sediment cores from ...late Quaternary compiled by the QUEEN project (Svendsen et al., 2004) ...Late Saalian (>140 ka), EW: Early Weichselian (100–80 ka), MW: Middle ... the late Quaternary compiled by the QUEEN project (Svendsen et al., 2004...LGM: Late Weichselian (25–15 ka). The speculative extent of an MIS 6 ice...involve sediment cores from a large spatial area; these are only plotted...sediment stratigraphy, past ice shelves and marginal marine ice sheets...studied cores. Furthermore, Cronin et al. (2010) analyzed sediment cores...Quaternary interglacial–glacial cycles. The Arctic Palaeoclimate and its ... Terrestrial and marine geological archives in the Arctic contain information on environmental change through Quaternary interglacial–glacial cycles. The Arctic Palaeoclimate and its Extremes (APEX) scientific network aims to better understand the magnitude and frequency of past Arctic climate variability, with focus on the “extreme” versus the “normal” conditions of the climate system. One important motivation for studying the amplitude of past natural environmental changes in the Arctic is to better understand the role of this region in a global perspective and provide base-line conditions against which to explore potential future changes in Arctic climate under scenarios of global warming. In this review we identify several areas that are distinct to the present programme and highlight some recent advances presented in this special issue concerning Arctic palaeo-records and natural variability, including spatial and temporal variability of the Greenland Ice Sheet, Arctic Ocean sediment stratigraphy, past ice shelves and marginal marine ice sheets, and the Cenozoic history of Arctic Ocean sea ice in general and Holocene oscillations in sea ice concentrations in particular. The combined sea ice data suggest that the seasonal Arctic sea ice cover was strongly reduced during most of the early Holocene and there appear to have been periods of ice free summers in the central Arctic Ocean. This has important consequences for our understanding of the recent trend of declining sea ice, and calls for further research on causal links between Arctic climate and sea ice.
Contributors: Arjen P. Stroeven, Clas Hättestrand, Johan Kleman, Jakob Heyman, Derek Fabel, Ola Fredin, Bradley W. Goodfellow, Jonathan M. Harbor, John D. Jansen, Lars Olsen
this article.) ...core record (Stroeven et al., 2015, Table 2). The ice recession lines ...Greenland ice core record of Rasmussen et al. (2014). Ages expressed in... 1989). ...core event stratigraphy (Rasmussen et al., 2014; see also Table 5, Fig...core area of the Fennoscandian Ice Sheet during deglaciation from its .... (2001). ...core record of Rasmussen et al. (2014). Ages expressed in cal kyr BP. ...Late Glacial clay varve chronologies in Sweden and Finland that are used ... To provide a new reconstruction of the deglaciation of the Fennoscandian Ice Sheet, in the form of calendar-year time-slices, which are particularly useful for ice sheet modelling, we have compiled and synthesized published geomorphological data for eskers, ice-marginal formations, lineations, marginal meltwater channels, striae, ice-dammed lakes, and geochronological data from radiocarbon, varve, optically-stimulated luminescence, and cosmogenic nuclide dating. This is summarized as a deglaciation map of the Fennoscandian Ice Sheet with isochrons marking every 1000 years between 22 and 13 cal kyr BP and every hundred years between 11.6 and final ice decay after 9.7 cal kyr BP.