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The Lateglacial and early Holocene climate variability and vegetation dynamics derived from chironomid and pollen records of Lieporiai palaeolake, North Lithuania
Quaternary International ( IF 2.2 ) Pub Date : 2020-12-14 , DOI: 10.1016/j.quaint.2020.12.017
Vaida Šeirienė , Neringa Gastevičienė , Tomi P. Luoto , Laura Gedminienė , Miglė Stančikaitė

To investigate the Lateglacial and early Holocene climatic and environmental dynamics in the Eastern Baltic we analysed chironomid and pollen data from Lieporiai palaeolake, North Lithuania. The first quantitative mean July air temperature reconstruction from Lithuania based on fossil chironomid assemblages was performed using expanded Fennoscandian calibration model. Our study suggests that sedimentation started at about 14 600 cal yrs BP and lasted until the early Holocene. The mean July air temperature for Lateglacial and early Holocene from studied site ranged between 13 °C−16 °C which was ~ 2–4 °C lower than the present. Rapidly after the deglaciation during Bølling (GI-1e) interstadial reconstructed July air temperature reached ~ 15 °C. The marked temperature decrease to 13.2 °C was recorded during the Older Dryas (GS-1d). Temperature reached its highest values (up to 16 °C) during the Allerød (GI-1a). The Younger Dryas (GS-1) was relatively cold with the mean July air temperature ~ 14 °C and this was 3.9 °C colder than the present. The pattern of the Lateglacial temperature changes from Lieporiai Lake shows both similarities and some differences from the other chironomid based regional and European reconstructions. Chironomid inferred palaeoenvironmental changes are in positive correlation with changes in the development of vegetation.



中文翻译:

来自立陶宛北部 Lieporiai 古湖摇蚊和花粉记录的晚冰期和早全新世气候变异和植被动态

为了研究波罗的海东部晚冰期和全新世早期的气候和环境动态,我们分析了来自立陶宛北部 Lieporiai 古湖的摇蚊和花粉数据。使用扩展的 Fennoscandian 校准模型进行了基于化石摇蚊组合的立陶宛 7 月平均气温的首次定量重建。我们的研究表明,沉积开始于大约 14 600 cal yrs BP 并持续到全新世早期。研究地点晚冰期和全新世早期的 7 月平均气温在 13°C-16°C 之间,比现在低约 2-4°C。在 Bølling (GI-1e) 间质重建期间冰消消融后迅速,7 月气温达到 ~ 15 °C。在旧仙女木 (GS-1d) 期间,温度明显下降至 13.2 °C。在 Allerød (GI-1a) 期间,温度达到了最高值(高达 16 °C)。Younger Dryas (GS-1) 相对寒冷,7 月平均气温约为 14 °C,比现在低 3.9 °C。Lieporiai 湖的晚冰期温度变化模式与其他基于摇蚊的区域和欧洲重建既有相似之处,也有一些不同之处。摇蚊推断的古环境变化与植被发育变化呈正相关。Lieporiai 湖的晚冰期温度变化模式与其他基于摇蚊的区域和欧洲重建既有相似之处,也有一些不同之处。摇蚊推断的古环境变化与植被发育变化呈正相关。Lieporiai 湖的晚冰期温度变化模式与其他基于摇蚊的区域和欧洲重建既有相似之处,也有一些不同之处。摇蚊推断的古环境变化与植被发育变化呈正相关。

更新日期:2020-12-14
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