The Kamyshovoye Lake sedimentary record in the southeastern Baltic Sea region was studied to reconstruct climatic fluctuations and the abiotic responses to them during the Lateglacial and Early Holocene. New results from chironomid, isotopic, palaeomagnetic and geochemical data analyses were correlated with earlier evidence of lithological and palynological changes in the Kamyshovoye Lake record. The section of the record that was studied covered the interval between 15 200 and 6500 cal. a BP. Palaeoclimatic reconstructions showed that during the Younger Dryas there was a two‐step decrease in the mean July temperature. The temperature dropped by 3 °C in the period from ̃12 650 to 12 300 cal. a BP, and then it dropped by another 0.5 °C to a minimum of 11.5 °C at 11 900 cal. a BP. During the Younger Dryas–Holocene transition, a temperature increase of 3 °C can be seen over a period of several centuries, inferred from the chironomid data. Further, the temperature curve showed that significant fluctuations continued until ̃9500 cal. a BP. During the coolings, the average July temperature dropped to values that were typical for the Younger Dryas, while values characteristic for the Allerød were only reached at around 9700 cal. a BP. After 9500 cal. a BP, a more stable, gradual increase in temperature was recorded. The short‐term Early Holocene climatic oscillations are clearly traced in the Kamyshovoye sequence, although the responses of the natural components are sometimes asynchronous. In the case of the Kamyshovoye study, the geochemical data seem to be a sensitive indicator of the climatic and environmental changes despite the absence of an evident response to the Holocene onset at ̃11 700 cal. a BP. Considerable changes in the geochemical pattern are recorded later, at ̃11 500 cal. a BP, coinciding with noticeable changes in the development of vegetation. The results obtained in this study contribute to a deeper understanding of how global climatic trends are manifested on a local scale.

中文翻译：

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波罗的海南部地区晚更新世-早全新世古环境演化：一种基于俄罗斯Kamyshovoye湖中的手性，地球化学和同位素数据的新方法

研究了波罗的海东南部地区的Kamyshovoye湖沉积记录，以重建晚冰川期和全新世早期的气候波动及其非生物响应。手性，同位素，古地磁和地球化学数据分析的新结果与Kamyshovoye湖记录中岩性和孢粉学变化的早期证据相关。研究的记录部分涵盖了15 200和6500 cal之间的间隔。BP。古气候重建表明，在年轻的德里亚斯时期，七月份的平均温度下降了两步。在̃12 650至12300 cal之间，温度下降了3°C。BP，然后在11900 cal下又下降了0.5°C，至最低11.5°C。BP。在年轻的树妖-全新世过渡时期，根据Chironomid数据推断，在几个世纪的时间内，温度升高了3°C。此外，温度曲线显示出明显的波动持续到̃9500 cal。BP。在降温期间，七月份的平均温度下降到了Younger Dryas的典型值，而Allerød的特征值仅在9700 cal左右才达到。BP。9500校准后 BP记录到温度更加稳定，逐渐升高。尽管自然成分的响应有时是异步的，但在Kamyshovoye序列中可以清楚地看到短期的全新世早期气候振荡。就Kamyshovoye研究而言，尽管没有对全新世始于the11 700 cal的明显响应，但地球化学数据似乎是气候和环境变化的敏感指标。BP。后来在̃11 500 cal记录了地球化学模式的显着变化。BP，与植被发育的显着变化相吻合。这项研究获得的结果有助于更深入地了解全球气候趋势如何在局部尺度上表现出来。