Skip to content

Research at St Andrews

Growth, dynamics and deglaciation of the last British-Irish ice sheet: the deep-sea ice-rafted detritus record

Research output: Contribution to journalReview article

Author(s)

James D. Scourse, Anna I. Haapaniemi, Elena Colmenero-Hidalgo, Victoria L. Peck, Ian R. Hall, William Austin, Paul C. Knutz, Rainer Zahn

School/Research organisations

Abstract

The evolution and dynamics of the last British-Irish Ice Sheet (BIIS) have hitherto largely been reconstructed from onshore and shallow marine glacial geological and geomorphological data. This reconstruction has been problematic because these sequences and data are spatially and temporally incomplete and fragmentary. In order to enhance BIIS reconstruction, we present a compilation of new and previously published ice-rafted detritus (IRD) flux and concentration data from high-resolution sediment cores recovered from the NE Atlantic deep-sea continental slope adjacent to the last BIIS. These cores are situated adjacent to the full latitudinal extent of the last BIIS and cover Marine Isotope Stages (MIS) 2 and 3. Age models are based on radiocarbon dating and graphical tuning of abundances of the polar planktonic foraminifera Neogloboquadrina pachyderma sinistral (% Nps) to the Greenland GISP2 ice core record. Multiple IRD fingerprinting techniques indicate that, at the selected locations, most IRD are sourced from adjacent MIS ice streams except in the centre of Heinrich (H) layers in which IRD shows a prominent Laurentide Ice Sheet provenance. IRD flux data are interpreted with reference to a conceptual model explaining the relations between flux, North Atlantic hydrography and ice dynamics. Both positive and rapid negative mass balance can cause increases, and prominent peaks, in IRD flux. First-order interpretation of the IRD record indicates the timing of the presence of the MIS with an actively calving marine margin. The records show a coherent latitudinal, but partly phased, signal during MIS 3 and 2. Published data indicate that the last MIS initiated during the MIS 514 cooling transition; renewed growth just before H5 (46 ka) was succeeded by very strong millennial-scale variability apparently corresponding with Dansgaard-Oeschger (DO) cycles closely coupled to millennial-scale climate variability in the North Atlantic region involving latitudinal migration of the North Atlantic Polar Front. This indicates that the previously defined "precursor events" are not uniquely associated with H events but are part of the millennial-scale variability. Major growth of the ice sheet occurred after 29 ka with the Barra Ice Stream attaining a shelf-edge position and generating turbiditic flows on the Barra-Donegal Fan at similar to 27 ka. The ice sheet reached its maximum extent at H2 (24 ka), earlier than interpreted in previous studies. Rapid retreat, initially characterised by peak IRD flux, during Greenland Interstadial 2 (23 ka) was followed by readvance between 22 and 16 ka. Readvance during HI was only characterised by BIIS ice streams draining central dome(s) of the ice sheet, and was followed by rapid deglaciation and ice exhaustion. The evidence for a calving margin and IRD supply from the MIS during Greenland Stadial 1 (Younger Dryas event) is equivocal. The timing of the initiation. maximum extent, deglacial and readvance phases of the BUS interpreted from the IRD flux record is strongly supported by recent independent data from both the Irish Sea and North Sea sectors of the ice sheet. (C) 2009 Elsevier Ltd. All rights reserved.

Close

Details

Original languageEnglish
Pages (from-to)3066-3084
Number of pages19
JournalQuaternary Science Reviews
Volume28
Issue number27-28
DOIs
Publication statusPublished - Dec 2009

    Research areas

  • NORTH-ATLANTIC OCEAN, EUROPEAN CONTINENTAL-MARGIN, BOTTOM-CURRENT PATHWAYS, ABRUPT CLIMATIC-CHANGE, HEINRICH EVENTS, GLACIAL MAXIMUM, NORTHEASTERN ATLANTIC, BARRA-FAN, RADIOCARBON CONSTRAINTS, QUATERNARY GLACIATIONS

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Size matters: analyses of benthic foraminiferal assemblages across differing size fractions

    Lo Giudice Cappelli, E. & Austin, W., 19 Nov 2019, (Accepted/In press) In : Frontiers in Marine Science.

    Research output: Contribution to journalArticle

  2. Organic carbon rich sediments: benthic foraminifera as bio-indicators of depositional environments

    Lo Giudice Cappelli, E., Clarke, J., Smeaton, C., Davidson, K. & Austin, W. E. N., 6 Nov 2019, In : Biogeosciences. 16, p. 4183-4199 17 p.

    Research output: Contribution to journalArticle

  3. Consistently dated Atlantic sediment cores over the last 40 thousand years

    Waelbroeck, C., Lougheed, B. C., Vazquez Riveiros, N., Missiaen, L., Pedro, J., Dokken, T., Hajdas, I., Wacker, L., Abbott, P., Dumoulin, J-P., Thil, F., Eynaud, F., Rossignol, L., Fersi, W., Albuquerque, A. L., Arz, H., Austin, W. E. N., Came, R., Carlson, A. E., Collins, J. A. & 43 others, Dennielou, B., Desprat, S., Dickson, A., Elliot, M., Farmer, C., Giraudeau, J., Gottschalk, J., Henderiks, J., Hughen, K., Jung, S., Knutz, P., Lebreiro, S., Lund, D. C., Lynch-Stieglitz, J., Malaizé, B., Marchitto, T., Martínez-Méndez, G., Mollenhauer, G., Naughton, F., Nave, S., Nürnberg, D., Oppo, D., Peck, V., Peeters, F. J. C., Penaud, A., Portilho-Ramos, R. D. C., Repschläger, J., Roberts, J., Rühlemann, C., Salgueiro, E., Sanchez Goni, M. F., Schönfeld, J., Scussolini, P., Skinner, L. C., Skonieczny, C., Thornalley, D., Toucanne, S., Rooij, D. V., Vidal, L., Voelker, A. H. L., Wary, M., Weldeab, S. & Ziegler, M., 2 Sep 2019, In : Scientific Data. 6, 12 p., 165.

    Research output: Contribution to journalArticle

Related by journal

  1. Quaternary Science Reviews (Journal)

    Colin Ballantyne (Member of editorial board)
    2000 → …

    Activity: Publication peer-review and editorial work typesEditor of research journal

Related by journal

  1. Distribution and ecology of planktic foraminifera in the North Pacific: implications for paleo-reconstructions

    Taylor, B. J., Rae, J. W. B., Gray, W. R., Darling, K., Burke, A., Gersonde, R., Abelmann, A., Maier, E., Esper, O. & Ziveri, P., 1 Jul 2018, In : Quaternary Science Reviews. 191, p. 256-274 19 p.

    Research output: Contribution to journalArticle

  2. Double the dates and go for Bayes — impacts of model choice, dating density and quality on chronologies

    Blaauw, M., Christen, J. A., Bennett, K. D. & Reimer, P. J., 15 May 2018, In : Quaternary Science Reviews. 188, p. 58-66 9 p.

    Research output: Contribution to journalArticle

  3. Multiple Late Holocene surges of a High-Arctic tidewater glacier system in Svalbard

    Lovell, H., Benn, D. I., Lukas, S., Ottesen, D., Luckman, A., Hardiman, M., Barr, L. D., Boston, C. M. & Sevestre, H., 1 Dec 2018, In : Quaternary Science Reviews. 201, p. 162-185 24 p.

    Research output: Contribution to journalArticle

  4. The MIS 13 interglacial at Ceprano, Italy, in the context of Middle Pleistocene vegetation changes in southern Europe

    Margari, V., Roucoux, K., Magri, D., Manzi, G. & Tzedakis, P. C., 1 Nov 2018, In : Quaternary Science Reviews. 199, p. 144-158 15 p.

    Research output: Contribution to journalArticle

  5. Towards a Middle Pleistocene terrestrial climate reconstruction based on herpetofaunal assemblages from the Iberian Peninsula: state of the art and perspectives

    Blain, H-A., Cruz Silva, J. A., Jiménez Arenas, J. M., Margari, V. & Roucoux, K., 1 Jul 2018, In : Quaternary Science Reviews. 191, p. 167-188 22 p.

    Research output: Contribution to journalReview article

ID: 2110395

Top