Land-ice teleconnections of cold climatic periods during the last Glacial/Interglacial transition

Brauer, Achim; Günter, Christina; Johnsen, S. J.; Negendank, Jörg F. W.

doi:10.1007/s003820050016

Cited by 52 publications

(43 citation statements)

References 30 publications

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“…14 summarise the succession of climatic events recognised from core 6. This sequence of events in general shows a good agreement with that established for the North Atlantic region and west-central Europe (Lotter et al, 1992;Björck et al, 1997 andBjörck et al, 1998;Grafenstein et al, 1999;Ammann et al, 2000;Brauer et al, 2000) and provides some additional indications discussed below.…”

Section: A High-resolution Record Of Climatic Changessupporting

confidence: 85%

“…The pollen record established at Lake Nimgun, south-western Alaska (Hu et al, 2002) and a sea-surface temperature record from the central Mediterranean sea (Sbaffi et al, 2004) reveal a similar short-lived warming episode dated to 12,100-12,000 cal yr BP. The general warming trend shown by most of the Lautrey data over the GS-1 is similar to that illustrated by the GRIP oxygen-isotope and Calcium records (Brauer et al, 2000), as well as by the Ammersee and Gerzensee 18 O records (Grafenstein et al, 1999;Ammann et al, 2000).…”

Section: A High-resolution Record Of Climatic Changessupporting

confidence: 72%

“…ca 13,550-13,450 cal yr BP) of the Lautrey record confirms the occurrence of an additional cold event (GS-1c2 as defined by Brauer et al in 2000 from the Meerfelder Maar sequence in Germany). This event is well marked in both the GRIP and Ammersee isotope records, where it is dated to ca 13,450 cal yr BP (Johnsen et al, 1992;Grafenstein et al, 1999) and has also been observed in Coleopteran MCR data from Gransmoor in NE England (Walker et al, 2003) and in the pollen profile from Längsee in Austria (Schmidt et al, 2002).…”

Section: A High-resolution Record Of Climatic Changessupporting

confidence: 57%

“…As illustrated by Fig. 1, Lake Lautrey is located close to the sites of Gerzensee (Swiss Plateau), Meerfelder Maar and Ammersee (Germany) where a quasisynchronicity has been observed between climatic events recorded in the Greenland ice-sheet and those reconstructed in west-central Europe, based on (1) varved sediments (Brauer et al, 2000), (2) a comparison between oxygen-isotope records (Grafenstein et al, 1999;Ammann et al, 2000), or (3) a combination of oxygen-isotope and pollen stratigraphies (Lotter et al, 1992). Keeping the disturbance of the isotopic signal at Lautrey due to detrital inputs at the beginning of Younger Dryas biozone and during the Older Dryas oscillation in mind (see Fig.…”

Section: Construction Of An Age-depth Modelmentioning

confidence: 89%

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Environmental and climatic changes in the Jura mountains (eastern France) during the Lateglacial–Holocene transition: a multi-proxy record from Lake Lautrey

Magny

Aalbersberg

Bégeot

et al. 2006

Quaternary Science Reviews

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This paper presents a multi-proxy reconstruction of the climatic and environmental changes during the Last Glacial-Interglacial transition as recorded by a sediment sequence from Lake Lautrey (Jura, eastern France). This reconstruction is based on analysis of pollen, chironomid, organic matter, oxygen-isotope, mineralogical, magnetic susceptibility and inferred lake-level data at a high temporal resolution. The chronology is derived using AMS radiocarbon dates, the position of the Laacher See Tephra (LST), and of correlation between the Lautrey and GRIP oxygen-isotope records. This data set reveals a detailed sequence of environmental changes in the Jura mountains from Greenland Stadial 2a to the early Holocene. Biotic and abiotic indicators allow the recognition of major abrupt changes associated with the GS2a/GI-1e, GI-1a/GS-1 and GS-1/Preboreal transitions, and other minor fluctuations related to the cold events GI-1d, GI-1b and the Preboreal oscillation (PBO). They also suggest additional cooling spells at ca 14,550 and 14,350 cal yr BP (Intra-Bølling Cold Periods), at ca 13,500 and ca 12,700 cal yr BP just before the GS-1 onset, and at ca 11,350 cal yr BP just before the PBO, as well as an intriguing brief warming episode within GS-1 at ca 12,080 cal yr BP. Summer temperature increased by ca 5 °C at the start of GI-1e, and by 1.5-3 °C at the Holocene onset, while it decreased by ca 3-4 °C at the beginning of GS-1. Major changes in local hydrology and in seasonality appear to be also associated with the GS-2a/GI1e, GI-1a/GS-1 and GS-1/Preboreal transitions. Pollen and abiotic indicators suggest a greater sensitivity of the vegetation cover to climatic oscillations during the first part of the Lateglacial Interstadial than during the second part (after ca 13,700 cal yr BP), when a closed forest had been restored in this area. By contrast, the restoration of forest cover took less than 300 yr after the end of GS-1. At the beginning of GI-1e and GS-1, no lag occurs (within the sampling resolution of 20-50 yr) in the responses of aquatic (chironomids) and terrestrial (pollen) ecosystems, while, at the onset of the Holocene, the response of the vegetation appears slightly delayed in comparison with that of the chironomid community. Finally, the recognition of two successive tephra layers, which were deposited just before the LST at ca 12,950 cal yr BP and which originated from Le Puy de la Nugère (Massif Central, France), provides an additional tephrochronological tool for correlation between Lateglacial European sequences.

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Section: A High-resolution Record Of Climatic Changessupporting

confidence: 85%

Section: A High-resolution Record Of Climatic Changessupporting

confidence: 72%

Section: A High-resolution Record Of Climatic Changessupporting

confidence: 57%

Section: Construction Of An Age-depth Modelmentioning

confidence: 89%

See 2 more Smart Citations

Environmental and climatic changes in the Jura mountains (eastern France) during the Lateglacial–Holocene transition: a multi-proxy record from Lake Lautrey

Magny

Aalbersberg

Bégeot

et al. 2006

Quaternary Science Reviews

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“…Temperature reconstructions indicate two major increases of the mean annual temperature at (1) the transition from the Pleniglacial to the Bølling-Allerød and (2) at the Younger Dryas/ Preboreal boundary. The period of approximately 3000 years in between, commonly referred to as the Lateglacial, is characterized by several decadal to millennial-scale climatic fluctuations that occurred extremely rapidly [von Grafenstein et al, 1999;Brauer et al, 2000]. The longest and most prominent of these fluctuations is the Younger Dryas which marks the end of the Lateglacial.…”

Section: Introductionmentioning

confidence: 99%

Late Quaternary environmental and climatic changes in central Europe as inferred from the composition of organic matter in annually laminated maar lake sediments

Fuhrmann

Fischer

Lücke

et al. 2004

Geochem Geophys Geosyst

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[1] Geochemical (elemental analysis, bulk d 13 C TOC , thermal degradation techniques, molecular analysis of n-alkanes) and microscopic investigations (maceral analysis, vitrinite reflectance) were performed (1) to characterize the organic matter (OM) in sediments from two maar lakes in the Westeifel volcanic field, Germany, and (2) to discuss paleoenvironmental processes which have controlled the accumulation and preservation of OM. The annually laminated sediments show a wide range of organic carbon contents between 0.3 and 21.4% TOC and Hydrogen Index values between 80 and 501 mg HC/g TOC. Welldeveloped laminations mirror suboxic to anoxic bottom waters. Diagnostic compounds in the pyrolysates and microscopic analysis permit discrimination between the principal OM sources, and their variations over time provide important evidence for the reconstruction of the environmental histories of the lakes and their watershed. The significance of terrigenous OM is reflected by the occurrence of methoxyphenols in the insoluble as well as mid-and long-chain n-alkanes in the soluble OM which are indicative of land plant or macrophyte input to the lakes. The relative abundance of certain homologues together with the amount of terrigenous macerals can be used to show differences in higher plant input and vegetation changes through time. During the Pleniglacial and Younger Dryas period, high-reflecting reworked OM was introduced by soil erosion in an environment with relatively open vegetation. The alkylphenols in the pyrolysates originate partly from the microbial reworking of proteinaceous tyrosine moieties and/or reflect a direct contribution from cyanobacteria. We assume that variations in the carbon isotopic composition of OM are mainly due to changes in the lake's primary productivity with the exception of the Pleniglacial. Various forms of land use are reflected by increasing amounts of terrigenous particles as well as chemical plant markers from 500 varve years B.P. until present. The organic geochemical and microscopic data G 3

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Offset timing of climate oscillations during the last two glacial‐interglacial transitions connected with large‐scale freshwater perturbation

Jimenez-Amat

Zahn

2015

Paleoceanography

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Th-dated speleothem timescale to ODP976 suggests glacial conditions in the Northeast Atlantic region were terminated abruptly and interglacial warmth was reached in less than a millennium. The early-MIS5e cooling and freshening at ODP976 coincided with similar changes at North Atlantic sites suggesting this was a basin-wide event. By analogy with T1, we argue that this was a YD-type event that was shifted into the early stages of the last interglacial period. This scenario is consistent with evidence from northern North Atlantic and Nordic Sea sites that the continuing disintegration of the large Saalian Stage (MIS6) ice sheet in Eurasia delayed the advection of warm North Atlantic waters and full-strength convective overturn until later stages of MIS5e.

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Land-ice teleconnections of cold climatic periods during the last Glacial/Interglacial transition

Cited by 52 publications

References 30 publications

Environmental and climatic changes in the Jura mountains (eastern France) during the Lateglacial–Holocene transition: a multi-proxy record from Lake Lautrey

Environmental and climatic changes in the Jura mountains (eastern France) during the Lateglacial–Holocene transition: a multi-proxy record from Lake Lautrey

Late Quaternary environmental and climatic changes in central Europe as inferred from the composition of organic matter in annually laminated maar lake sediments

Offset timing of climate oscillations during the last two glacial‐interglacial transitions connected with large‐scale freshwater perturbation

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