Quantitative summer and winter temperature reconstructions from pollen and chironomid data between 15 and 8 ka BP in the Baltic–Belarus area

Veski, Siim; Seppä, Heikki; Stančikaitė, Miglė; Zernitskaya, Valentina; Reitalu, Triin; Gryguc, Gražyna; Heinsalu, Atko; Stivriņš, Normunds; Amon, Leeli; Vassiljev, Jüri; Heiri, Oliver

doi:10.1016/j.quaint.2014.10.059

Cited by 53 publications

(35 citation statements)

References 34 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. This is in contrast to central and western Europe, where aeolian activity of a similar time span took place (Tolksdorf & Kaiser, 2012;Zieliński et al, 2015).…”

Section: When Did Deposition Take Place?supporting

confidence: 85%

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: 85%

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

Nartišs

Kalińska

2017

Geologos

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“…A clear peak in mineral matter between 9,400 and 9,200 cal BP (Fig. 3) coincides with a temperature drop in the northern Baltic region, as inferred from pollen data (Heikkilä & Seppä, 2010;Veski et al, 2014). At the same time, a distinct lowering of water levels was recorded for several lakes in southern Sweden (Digerfeldt, 1988) and Estonia (Saarse et al, 1995), indicating a drier climate.…”

Section: Discussionsupporting

confidence: 57%

“…Nevertheless, the cyclicity was not strictly periodic, but changed between 200 and 400 years, probably indicating a climate in which brief warming was punctuated by colder phases. The most drastic change in the LOI data coincides with regionally altered climate systems, at approximately 9,000-9,300; 5,600-5,200 and during the last 1,200 years (Heikkilä & Seppä, 2010;Seppä et al, 2009;Veski et al, 2014). However, several local driving forces, such as lake level fluctuation, soil erosion, bioproduction and human impact, also have an impact on the sediment composition and cyclic pattern.…”

Section: Discussionmentioning

confidence: 83%

Cyclic sedimentation pattern in Lake Veetka, southeast Estonia: a case study

Saarse

2015

Geologos

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A sediment core from Lake Veetka, southeast Estonia, 1077 cm in length and covering 10,500 calibrated years, was examined using loss-on-ignition, grain-size distribution and AMS 14 C dating to reconstruct depositional dynamics. The studied core, recovered from the northern part of the lake, shows a cyclic pattern of organic and mineral matter concentration with cycle durations of 100-400 years. Cyclicity is displayed better in sediments laid down between 9,200 and 5,600 cal BP. Within two time windows (5,600-5,100 cal BP and from 1,200 cal BP to the present), sediment composition changed drastically on account of a high and fluctuating mineral matter content, obviously driven by different factors. Little Ice Age cooling is characterised by the highest proportion of mineral matter, and the Medieval Warm Period is typified by high organic matter content. The cyclic change of organic and mineral matter has been related to climate dynamics, most likely an alternation of wet and dry conditions, changes in the water level of the lake and differences in bioproduction.

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“…Recent pollen-based temperature reconstructions from Lake Udriku show summer temperatures of 10.2-12.6 °C (Veski et al, 2015), but the results are biased due to the long transport of pollen over the treeless landscape and therefore overestimate the temperature range. The first pioneer tree species in the Baltic area is tree-birch and the local presence of treebirch requires summer temperatures of ~10-12 °C (Paus, 1995) or >13.2 °C (Odland, 1996), so the temperature in Pandivere probably did not reach these values.…”

Section: Late-glacial Flora Beyond and On The Pandivere Uplandmentioning

confidence: 99%

Timing of the deglaciation and the late-glacial vegetation development on the Pandivere Upland, North Estonia

Amon¹,

Saarse²,

Vassiljev³

et al. 2016

Bull Geol Soc Finland

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In this study, the deglaciation chronology of the Pandivere Upland is defined, and the late-glacial vegetation trends of north-eastern Estonia are summarised. The multi-proxy study includes accelerated mass spectrometry 14 C dating, plant macrofossil, magnetic susceptibility, loss-on-ignition and grain-size distribution data of the lacustrine sediment record from one previously unpublished study site (Kursi), and the study discusses the results in combination with five previously published study locations from the area.The results indicate that the deglaciation of the Pandivere Upland started at approximately 14 200 cal. yr BP and was completed by 13 800 cal. yr BP. The ice recession rate was approximately 180 m yr -1 . Based on these new radiocarbon dates, the Baltic Ice Lake stage A 1 submerged the northern and western ice-free areas of Estonia by ca. 13 800 cal. yr BP. The prevalent vegetation type in north-eastern Estonia during the late-glacial period was tundra with local variations in the dominant shrub species. The region remained treeless until the Holocene.

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Quantitative summer and winter temperature reconstructions from pollen and chironomid data between 15 and 8 ka BP in the Baltic–Belarus area

Cited by 53 publications

References 34 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

Cyclic sedimentation pattern in Lake Veetka, southeast Estonia: a case study

Timing of the deglaciation and the late-glacial vegetation development on the Pandivere Upland, North Estonia

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