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, Stéphanie; Goñi, Marı́a Fernanda Sánchez; Naughton, Filipa; Turon, Jean‐Louis; Duprat, J.; Malaizé, Bruno; Cortijo, Elsa; Peypouquet, J. P.

doi:10.1016/s1571-0866(07)80050-9

Cited by 35 publications

(32 citation statements)

References 37 publications

(41 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…4) Bussell and Pillans (1992), Bradley (1999Bradley ( , 2015, and Siddall et al (2007) labeled the earliest peak in MIS 9 as MIS 9c, whereas Tzedakis et al (1997) designated that peak as MIS 9e, and it was subsequently identified as MIS 9e on the Quaternary chronostratigraphical charts of Gibbard and Cohen (2008) and Cohen and Gibbard (2011) and in Fig. 25.3 of Desprat et al (2007). On the other hand, Fig.…”

Section: Extension Of Lettered Substages To Time Other Than Mis 5 Anmentioning

confidence: 98%

“…In their text, Bühring et al (2004) innovated further by using substage designations with two decimal-style dots, as in their substages 5.3.1 and 5.3.3. In a more complex hybrid, Jahns et al (1998) combined decimal-style numbers and letters in identifying single substages when they referred to "d 18 O-substage 12.2h", and Desprat et al (2007) combined lettered and numbered substages (e.g., 8.2, 9e, and 11.3) in one series in their Fig. 25.3.…”

Section: Hybridization and Modification (~1990 To Present)mentioning

confidence: 99%

See 1 more Smart Citation

An optimized scheme of lettered marine isotope substages for the last 1.0 million years, and the climatostratigraphic nature of isotope stages and substages

Railsback

Gibbard

Head

et al. 2015

Quaternary Science Reviews

517

346

View full text Add to dashboard Cite

a b s t r a c tA complete and optimized scheme of lettered marine isotope substages spanning the last 1.0 million years is proposed. Lettered substages for Marine Isotope Stage (MIS) 5 were explicitly defined by Shackleton (1969), but analogous substages before or after MIS 5 have not been coherently defined. Short-term discrete events in the isotopic record were defined in the 1980s and given decimal-style numbers, rather than letters, but unlike substages they were neither intended nor suited to identify contiguous intervals of time. Substages for time outside MIS 5 have been lettered, or in some cases numbered, piecemeal and with conflicting designations. We therefore propose a system of lettered substages that is complete, without missing substages, and optimized to match previous published usage to the maximum extent possible. Our goal is to provide order and unity to a taxonomy and nomenclature that has developed ad hoc and somewhat chaotically over the decades. Our system is defined relative to the LR04 stack of marine benthic oxygen isotope records, and thus it is grounded in a continuous record responsive largely to changes in ice volume that are inherently global.This system is intended specifically for marine oxygen isotope stages, but it has relevance also for oxygen isotope stages recognized in time-series of non-marine oxygen isotope data, and more generally for climatic stages, which are recognized in time-series of non-isotopic as well as isotopic data. The terms "stage" and "substage" in this context are best considered to represent climatostratigraphic units, and thus "climatic stages" and "climatic substages", because they are recognized from geochemical and sedimentary responses to climate change that may not have been synchronous at global scale.

show abstract

Section: Extension Of Lettered Substages To Time Other Than Mis 5 Anmentioning

confidence: 98%

Section: Hybridization and Modification (~1990 To Present)mentioning

confidence: 99%

An optimized scheme of lettered marine isotope substages for the last 1.0 million years, and the climatostratigraphic nature of isotope stages and substages

Railsback

Gibbard

Head

et al. 2015

Quaternary Science Reviews

517

346

View full text Add to dashboard Cite

show abstract

“…For example, discrepancies exist between marine records on the existence of a northern temperature reversal during Termination II (Sarnthein and Tiedemann, 1990;Adkins et al, 1997;Chapman and Shackleton, 1998;Oppo et al, 2001;Kelly et al, 2006;Desprat et al, 2007;Weldeab et al, 2007). The establishment of the peak interglacial warmth at high northern latitudes during the LIG also remains controversial.…”

Section: A Govin Et Al: Early Last Interglacial Climate and Ice Shementioning

confidence: 99%

Persistent influence of ice sheet melting on high northern latitude climate during the early Last Interglacial

et al. 2012

Self Cite

View full text Add to dashboard Cite

Abstract. Although the Last Interglacial (LIG) is often considered as a possible analogue for future climate in high latitudes, its precise climate evolution and associated causes remain uncertain. Here we compile high-resolution marine sediment records from the North Atlantic, Labrador Sea, Norwegian Sea and the Southern Ocean. We document a delay in the establishment of peak interglacial conditions in the North Atlantic, Labrador and Norwegian Seas as compared to the Southern Ocean. In particular, we observe a persistent iceberg melting at high northern latitudes at the beginning of the LIG. It is associated with (1) colder and fresher surfacewater conditions in the North Atlantic, Labrador and Norwegian Seas, and (2) a weaker ventilation of North Atlantic deep waters during the early LIG (129-125 ka) compared to the late LIG. Results from an ocean-atmosphere coupled model with insolation as a sole forcing for three key periods of the LIG show warmer North Atlantic surface waters and stronger Atlantic overturning during the early LIG (126 ka) than the late LIG (122 ka). Hence, insolation variations alone do not explain the delay in peak interglacial conditions observed at high northern latitudes. Additionally, we consider an idealized meltwater scenario at 126 ka where the freshwater input is interactively computed in response to the high boreal summer insolation. The model simulates colder, fresher North Atlantic surface waters and weaker Atlantic overturning during the early LIG (126 ka) compared to the late LIG (122 ka). This result suggests that both insolation and ice sheet melting have to be considered to reproduce the climatic pattern that we identify during the early LIG. Our modeldata comparison also reveals a number of limitations and reinforces the need for further detailed investigations using coupled climate-ice sheet models and transient simulations.

show abstract

“…Spores and aquatic pollen percentages were obtained from the total sum including pollen, spores, indeterminables and unknowns. We have defined the major forested phases as periods showing a classical tree succession which is known in Southern Europe and in particular in NW Iberia for beginning with the development of Betula, deciduous Quercus, and ending by the expansion of late successional trees such as Carpinus betulus and Fagus (Tzedakis et al, 2001;Desprat et al, 2007). Local names are given to these major forested periods.…”

Section: Pollen Analysismentioning

confidence: 99%

Millennial-scale climatic variability between 340 000 and 270 000 years ago in SW Europe: evidence from a NW Iberian margin pollen sequence

et al. 2009

Self Cite

View full text Add to dashboard Cite

Abstract.We present a new high-resolution marine pollen record from NW Iberian margin sediments (core MD03-2697) covering the interval between 340 000 and 270 000 years ago, a time period centred on Marine Isotope Stage (MIS) 9 and characterized by particular baseline climate states. This study enables the documentation of vegetation changes in the north-western Iberian Peninsula and therefore the terrestrial climatic variability at orbital and in particular at millennial scales during MIS 9, directly on a marine stratigraphy. Suborbital vegetation changes in NW Iberia in response to cool/cold events are detected throughout the studied interval even during MIS 9e ice volume minimum. However, they appear more frequent and of higher amplitude during the 30 000 years following the MIS 9e interglacial period and during the MIS 9a-8 transition, which correspond to intervals of an intermediate to high ice volume and mainly periods of ice growth. Each suborbital cold event detected in NW Iberia has a counterpart in the Southern Iberian margin SST record. High to moderate amplitude cold episodes detected on land and in the ocean appear to be related to changes in deep water circulation and probably to iceberg discharges at least during MIS 9d, the mid-MIS 9c cold event and MIS 9b. This work provides therefore additional evidence of pervasive millennial-scale climatic variability in the North Atlantic borderlands throughout past climatic cycles of the Late Pleistocene, regardless of glacial state. However, ice volume might have an indirect influence on the amplitude of the millennial climatic changes in Southern Europe.

show abstract

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

Cited by 35 publications

References 37 publications

An optimized scheme of lettered marine isotope substages for the last 1.0 million years, and the climatostratigraphic nature of isotope stages and substages

An optimized scheme of lettered marine isotope substages for the last 1.0 million years, and the climatostratigraphic nature of isotope stages and substages

Persistent influence of ice sheet melting on high northern latitude climate during the early Last Interglacial

Millennial-scale climatic variability between 340 000 and 270 000 years ago in SW Europe: evidence from a NW Iberian margin pollen sequence

Contact Info

Product

Resources

About