Mid-Brunhes century-scale diatom sea surface temperature and sea ice records from the Atlantic sector of the Southern Ocean (ODP Leg 177, sites 1093, 1094 and core PS2089-2)

Kunz-Pirrung, Martina; Gersonde, Rainer; Hodell, David A

doi:10.1016/s0031-0182(01)00501-6

Cited by 53 publications

(19 citation statements)

References 64 publications

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“…This is an indication of early warming of the surface ocean prior to glacial terminations at this subantarctic South Atlantic location, as SST rose substantially at subantarctic latitudes before any considerable continental ice volume change was recorded. The importance of the lead, and freshwater fluxes into the Southern Ocean, has already been stressed [Seidov et al, 2001], and a similar early response at terminations occurs in the California Current (East Pacific), at subtropical/subboreal latitudes [Herbert et al, 2001], at subantarctic latitudes [Charles et al, 1996;Labeyrie et al, 1996;Brathauer and Abelmann, 1999], in the eastern tropical Atlantic Ocean [Schneider et al, 1995], in the SW Africa upwelling system [Kim et al, 2002], and in the Polar and Antarctic Zone as well [Kunz-Pirrung et al, 2002;Gersonde, 2002, 2004]. In the California Current region SST increases several kyrs in advance of deglaciation at past glacial maxima [Herbert et al, 2001], suggesting that the surface ocean responded faster than continental ice sheets to an external climatic agent, for example, solar activity changes, sea-ice retreat, atmospheric CO 2 decrease [Shackleton, 2000].…”

Section: Surface Hydrography Changes Prior To Glacial Terminationsmentioning

confidence: 88%

The last five glacial‐interglacial transitions: A high‐resolution 450,000‐year record from the subantarctic Atlantic

2007

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[1] A submillennial resolution, radiolarian-based record of summer sea surface temperature (SST) documents the last five glacial to interglacial transitions at the subtropical front, southern Atlantic Ocean. Rapid fluctuations occur both during glacial and interglacial intervals, and sudden cooling episodes at glacial terminations are recurrent. Surface hydrography and global ice volume proxies from the same core suggest that summer SST increases prior to terminations lead global ice-volume decreases by 4.7 ± 3.7 ka (in the eccentricity band), 6.9 ± 2.5 ka (obliquity), and 2.7 ± 0.9 ka (precession). A comparison between SST and benthic d 13 C suggests a decoupling in the response of northern subantarctic surface, intermediate, and deep water masses to cold events in the North Atlantic. The matching features between our SST record and the one from core MD97-2120 (southwest Pacific) suggests that the super-regional expression of climatic events is substantially affected by a single climatic agent: the Subtropical Front, amplifier and vehicle for the transfer of climatic change. The direct correlation between warmer DT site at Vostok and warmer SST at ODP Site 1089 suggests that warmer oceanic/ atmospheric conditions imply a more southward placed frontal system, weaker gradients, and therefore stronger Agulhas input to the Atlantic Ocean.Citation: Cortese, G., A. Abelmann, and R. Gersonde (2007), The last five glacial-interglacial transitions: A high-resolution 450,000-year record from the subantarctic Atlantic, Paleoceanography, 22, PA4203,

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Section: Surface Hydrography Changes Prior To Glacial Terminationsmentioning

confidence: 88%

The last five glacial‐interglacial transitions: A high‐resolution 450,000‐year record from the subantarctic Atlantic

2007

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“…For example, at Site 1093, MIS 12 glacial sediments are dark, diatom-bearing, carbonate-free muds with abundant dropstones and containing diatom indicators of winter sea ice cover (Kunz-Pirrung et al, 2002). During the transition to MIS 11 (Termination V) this sediment is succeeded by diatom ooze containing LDM which is, in turn overlain by pale diatom-nannofossil ooze (Shipboard-Scientific-Party, 1999).…”

Section: Other Sedimentological Micropaleontological and Geochemicalmentioning

confidence: 99%

“…at Site 1093 (Kunz-Pirrung et al, 2002;Hodell et al, 2003a) and MIS 31 at Site 1094 (Scherer et al 2008). …”

Section: Identification Of Laminated Diatom Mat Depositsmentioning

confidence: 99%

Migration of the Antarctic Polar Front through the mid-Pleistocene transition: evidence and climatic implications

Kemp

Grigorov

Pearce

et al. 2010

Quaternary Science Reviews

108

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“…Some works suggest that the warmest phase of MIS 11 shows the highest temperatures of the last 500 000 years (Howard, 1997;Droxler and Farrel, 2000;Berstad et al, 2002). However, this idea is challenged by many works (Bauch et al, 2000;Hodell et al, 2000;Kunz-Pirrung et al, 2002;McManus et al, 2003) which have shown that MIS 11 was not warmer than today. The deuterium signal of Vostok ice-core records the highest temperatures for MIS 9 (Petit et al, 1999), but the recent results of EPICA-Dome C ice core do not confirm this idea (EPICA Community Members, 2004).…”

Section: Warmth Amplitudes Of the Last 450 000 Yearsmentioning

confidence: 99%

25. Climate variability of the last five isotopic interglacials: Direct land-sea-ice correlation from the multiproxy analysis of North-Western Iberian margin deep-sea cores

Desprat

Goñi

Naughton

et al. 2007

Developments in Quaternary Sciences

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The last five isotopic interglacials (marine isotope stages 11, 9, 7, 5 and 1) were investigated in Iberian margin deep-sea cores, using terrestrial (pollen) and marine (planktic foraminifera assemblages, benthic and planktic oxygen isotopes) climatic indicators. This work shows that the climatic variability detected on the continent is contemporaneously recorded in the ocean, but temperature changes are not in phase with ice volume variations. The comparison of the different marine isotope stages highlights a common pattern within these stages. They are characterized by three major climatic cycles, related to orbital cyclicity, on which suborbital climatic fluctuations are superimposed. Particularly, suborbital events interrupt the deglacial warming associated with Terminations IV to I and the second major warm period of each isotopic interglacial as well as the transitions towards glacial marine isotope stages. MIS 7 displays a short first warm period ($ 8 kyr) followed by a striking cold and dry period succeeded by a new strong warmth. In contrast, MIS 11 presents the longest period ($ 31 kyr) of the last 450 000 years.

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Mid-Brunhes century-scale diatom sea surface temperature and sea ice records from the Atlantic sector of the Southern Ocean (ODP Leg 177, sites 1093, 1094 and core PS2089-2)

Cited by 53 publications

References 64 publications

The last five glacial‐interglacial transitions: A high‐resolution 450,000‐year record from the subantarctic Atlantic

The last five glacial‐interglacial transitions: A high‐resolution 450,000‐year record from the subantarctic Atlantic

Migration of the Antarctic Polar Front through the mid-Pleistocene transition: evidence and climatic implications

25. Climate variability of the last five isotopic interglacials: Direct land-sea-ice correlation from the multiproxy analysis of North-Western Iberian margin deep-sea cores

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