Mid Pleistocene climate instability in the subtropical northwestern Atlantic

Billups, Katharina; Lindley, Carolyn; Fisler, J.; Martin, Pamela A.

doi:10.1016/j.gloplacha.2006.06.025

Cited by 21 publications

(26 citation statements)

References 63 publications

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“…These observations about the character of Termination V from the low-latitude East Atlantic are in line with previous results from other marine records indicating that in the Northern Hemisphere MIS 12 was an extremely pronounced glacial climate period (e.g. Rohling et al, 1998;Helmke and Bauch, 2003;Billups et al, 2006), which terminated in a long-lasting glacial-interglacial transition of much higher amplitude than the later Pleistocene terminations (Oppo et al, 1998;Thunell et al, 2002;Kandiano and Bauch, 2007).…”

Section: Termination Vsupporting

confidence: 92%

Uniform climate development between the subtropical and subpolar Northeast Atlantic across marine isotope stage 11

et al. 2008

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Abstract. Proxy records from a core site off Northwest Africa were generated and compared with data from the subpolar Northeast Atlantic to unravel some main climatic features of interglacial marine isotope stage (MIS) 11 (423-362 ka). The records point to an almost 25 kyr lasting full interglacial period during stage 11 that was preceded by a considerably long glacial-interglacial transition (Termination V). Off NW Africa, a strong reduction of terrestrially derived iron input is noted after 420 ka suggesting a pronounced increase in continental humidity and vegetation cover over Northwest Africa. In analogy to the Holocene climate of the region, this early wet phase of MIS 11 was likely associated with enhanced influence of the West African monsoon system on the Saharan-Sahel region which led to both a reduction in trade wind intensity off NW Africa and the formation of sapropel S11 in the Mediterranean Sea. A detailed comparison with data from the subpolar North Atlantic indicates a remarkable coherent timing for the main environmental changes in both regions giving evidence for strong interglacial climate connection between the low and high latitude North Atlantic. Although our records of MIS 11 compare well with the Holocene in terms of some major climate characteristics there are distinct differences in the temporal evolution of each peak warm interval. This suggests that care should be taken when using MIS 11 as analogue to forecast future interglacial conditions.

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Section: Termination Vsupporting

confidence: 92%

Uniform climate development between the subtropical and subpolar Northeast Atlantic across marine isotope stage 11

et al. 2008

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“…3c), supports the influence of subtropical waters on the Iberian margin during this stage (Voelker et al, 2010) and agrees with results deriving from several records indicating MIS 14 as a weak glacial (e.g. Mix et al, 1995;Wright and Flower, 2002;Billups et al, 2006;Hodell et al, 2008;Lang and Wolff, 2011;Rodrigues et al, 2011). Total NAR values during MIS 14 are also slightly higher if compared with older and younger glacials (Fig.…”

Section: Glacial Variabilitysupporting

confidence: 90%

Coccolithophore variability from the Shackleton Site (IODP Site U1385) through MIS 16-10

Maiorano

Marino

Balestra

et al. 2015

Global and Planetary Change

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“…(by ∼0.3 per mil). At Site 1058, Billups et al [2006] measured the stable isotopic composition of both morphologies in 38 intervals and found an offset similar to the published one. Here we subtract 0.3 per mil from the δ 18 O values of G. ruber s.l.…”

Section: Approachsupporting

confidence: 73%

Evolution of millennial‐scale climate variability during the mid‐Pleistocene

2008

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[1] We use the oxygen isotopic composition of planktonic foraminifera Globigerinoides ruber (white) from Ocean Drilling Program Site 1058 in the subtropical northwestern Atlantic to construct a high-resolution ($ 800 year) climate record spanning the mid-Pleistocene climate transition ($410 ka to 1350 ka). We investigate whether or not millennial-scale instabilities in the proxy record are associated with the extent of continental glaciation. G. ruber d 18 O values display high-frequency fluctuations throughout the record, but the amplitude about mean glacial and interglacial d 18 O values increases at marine isotope stage (MIS) 22 (880 ka) and is highest during MIS 12. These observations support that millennial-scale climate instabilities are associated with ice sheet size. Time series analysis illustrates that these variations have significant concentration of spectral power centered on periods of $10-12 ka and $5 ka. The timing of these fluctuations agrees well, or coincides with, the periodicities of the second and fourth harmonics, respectively, of precessional forcing at the equator. An insolation-based origin of the millennial-scale instabilities would be independent of ice volume and explains the presence of these fluctuations before the mid-Pleistocene climate transition as well as during interglacial intervals (e.g., MIS 37 and 17). Because the amplitude of the millennial-scale variations increases during the mid-Pleistocene transition, feedback mechanisms associated with the growth of large, 100-ka-paced, polar ice sheets may be important amplifiers of regional surface water hydrographic changes.

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Mid Pleistocene climate instability in the subtropical northwestern Atlantic

Cited by 21 publications

References 63 publications

Uniform climate development between the subtropical and subpolar Northeast Atlantic across marine isotope stage 11

Uniform climate development between the subtropical and subpolar Northeast Atlantic across marine isotope stage 11

Coccolithophore variability from the Shackleton Site (IODP Site U1385) through MIS 16-10

Evolution of millennial‐scale climate variability during the mid‐Pleistocene

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