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| Livingstone, Stephen J.; Cofaigh, Colm O.; Stokes, Chris R.; Hillenbrand, Claus-dieter; Vieli, Andreas; Jamieson, Stewart S. R.. |
| We review the geomorphological, sedimentological and chronological evidence for palaeo-ice streams on the continental shelf of Antarctica and use this information to investigate basal conditions and processes, and to identify factors controlling grounding-line retreat. A comprehensive circum-Antarctic inventory of known palaeo-ice streams, their basal characteristics and minimum ages for their retreat following the Last Glacial Maximum (LGM) is also provided. Antarctic palaeo-ice streams are identified by a set of diagnostic landforms that, nonetheless, display considerable spatial variability due to the influence of substrate, flow velocity and subglacial processes. During the LGM, palaeo-ice streams extended, via bathymetric troughs, to the shelf edge of... |
| Tipo: Text |
Palavras-chave: Antarctica; Ice stream; Grounding-line retreat; Glacial geomorphology; Deglacial history. |
| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00266/37684/82771.pdf |
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| Turney, Chris S. M.; Jones, Richard T.; Mckay, Nicholas P.; Van Sebille, Erik; Thomas, Zoë A.; Hillenbrand, Claus-dieter; Fogwill, Christopher J.. |
| A valuable analogue for assessing Earth's sensitivity to warming is the Last Interglacial (LIG; 129–116 ka), when global temperatures (0 to +2 ∘C) and mean sea level (+6 to 11 m) were higher than today. The direct contribution of warmer conditions to global sea level (thermosteric) is uncertain. We report here a global network of LIG sea surface temperatures (SST) obtained from various published temperature proxies (e.g. faunal and floral plankton assemblages, Mg ∕ Ca ratios of calcareous organisms, and alkenone UK′37). We summarize the current limitations of SST reconstructions for the LIG and the spatial temperature features of a naturally warmer world. Because of local δ18O seawater changes, uncertainty in the age models of marine cores, and differences... |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00663/77549/79436.pdf |
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