Cold event at 8200 yr B.P. recorded in annually laminated lake sediments in eastern Europe

Veski, Siim; Seppä, Heikki; Ojala, Antti E. K.

doi:10.1130/g20683.1

Cited by 139 publications

(131 citation statements)

References 30 publications

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“…This is also consistent with the increased input of terrigeneous matter in lacustrine sediments, which could be related to the decay of vegetation and soil layer as found occasionally in the region (Gryguc et al, 2013;Saarse, 2015) and which coincides with a gradual temperature decrease in the northern Baltic region (Heikkilä & Seppä, 2010;Veski et al, 2004Veski et al, , 2015. To date, this cold event has not been detected in the organic record of Latvia (Stivrins et al, 2014(Stivrins et al, , 2015; thus it probably did not a great impact on the increase of aeolian activity.…”

Section: When Did Deposition Take Place?supporting

confidence: 66%

An aeolian or a glaciolacustrine record? A case study from Mieļupīte, Middle Gauja Lowland, northeast Latvia

Nartišs

Kalińska

2017

Geologos

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In the Middle Gauja Lowland, northeast Latvia, dunes are distributed over a vast glaciolacustrine plain that formed during the retreat of the Fennoscandian ice sheet. Such a direct contact between aeolian and glaciolacustrine sediments can be used to infer depositional settings and decipher to what extent these sediments bear an aeolian component. Our proxies, although preliminary, reveal a limited range of variation in grain-size parameters, a significant presence of quartz grains with silica precipitation and matt-surface grains of various rounding degrees and massive structure combined with horizontal lamination. These are indicative of periglacial-aeolian depositional conditions in the foreland of the Linkuva ice-marginal zone. Sedimentary characteristics do not match a single luminescence date of 9.2±0.6 ka, which significantly postdates the minimum age of the Linkuva ice-marginal zone with 10Be ages between 15.4 and 12.0 ka. Whether deposition started directly after drainage of the Middle Gauja ice-dammed lake or if there is a gap of 2.8-6.2 ka is a matter of debate; only future studies at higher OSL resolution could resolve this.

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Section: When Did Deposition Take Place?supporting

confidence: 66%

An aeolian or a glaciolacustrine record? A case study from Mieļupīte, Middle Gauja Lowland, northeast Latvia

Nartišs

Kalińska

2017

Geologos

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“…Here, the cold event lasted 200-300 years and ended by a sudden temperature rise. In Estonia, the cold event lasted longer as indicated by a longer period of vegetation re-establishment after a decrease in annual air temperature of at least 1.5-2.0°C (Seppä and Poska 2004;Veski et al 2004). …”

Section: The '82 Ka Cold Event'mentioning

confidence: 99%

Climate Change During the Holocene (Past 12,000 Years)

Борзенкова

Zorita

Borisova

et al. 2015

Regional Climate Studies

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This chapter summarises the climatic and environmental information that can be inferred from proxy archives over the past 12,000 years. The proxy archives from continental and lake sediments include pollen, insect remnants and isotopic data. Over the Holocene, the Baltic Sea area underwent major changes due to two interrelated factors-melting of the Fennoscandian ice sheet (causing interplay between global sea-level rise due to the meltwater and regional isostatic rebound of the earth's crust causing a drop in relative sea level) and changes in the orbital configuration of the Earth (triggering the glacial to interglacial transition and affecting incoming solar radiation and so controlling the regional energy balance). The Holocene climate history showed three stages of natural climate oscillations in the Baltic Sea region: short-term cold episodes related to deglaciation during a stable positive temperature trend (11,000-8000 cal year BP); a warm and stable climate with air temperature 1.0-3.5°C above modern levels (8000-4500 cal year BP), a decreasing temperature trend; and increased climatic instability (last 5000-4500 years). The climatic variation during the Lateglacial and Holocene is reflected in the changing lake levels and vegetation, and in the formation of a complex hydrographical network that set the stage for the Medieval Warm Period and the Little Ice Age of the past millennium.

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“…Meriläinen et al 2001;Fisher et al 2003;Hynynen et al 2004;Das et al 2005;Sayer et al 2006) and stable isotopes (e.g. Finney et al 2000Finney et al , 2002Hammarlund et al 2002;Veski et al 2004;Wooller et al 2004;Seppä et al 2005). As well as the development of under-utilised fossil proxies (e.g.…”

Section: Future Directionsmentioning

confidence: 99%

Multi-proxy studies in palaeolimnology

Birks

2006

Veget Hist Archaeobot

316

173

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Multi-proxy studies are becoming increasingly common in palaeolimnology. Eight basic requirements and challenges for a multi-proxy study are outlined in this essay -definition of research questions, leadership, site selection and coring, data storage, chronology, presentation of results, numerical tools and data interpretation. The nature of proxy data is discussed in terms of physical proxies and biotic proxies. Loss-on-ignition changes and the use of transfer functions are reviewed as examples of problems in the interpretation of data from multi-proxy studies. The importance of pollen analysis and plant macrofossil analysis in multi-proxy studies is emphasised as lake history cannot be interpreted without knowledge of catchment history. Future directions are outlined about how multi-proxy studies can contribute to understanding biotic responses to environmental change.

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Cold event at 8200 yr B.P. recorded in annually laminated lake sediments in eastern Europe

Cited by 139 publications

References 30 publications

An aeolian or a glaciolacustrine record? A case study from Mieļupīte, Middle Gauja Lowland, northeast Latvia

An aeolian or a glaciolacustrine record? A case study from Mieļupīte, Middle Gauja Lowland, northeast Latvia

Climate Change During the Holocene (Past 12,000 Years)

Multi-proxy studies in palaeolimnology

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