Early Holocene winter air temperatures have been reconstructed for the north‐eastern part of the East European Plain using stable isotope (δ¹⁸O and δ²H) records of syngenetic ice wedges. We show that ice wedges here actively grew synchronously with accumulation of peatlands in bogged and forested depressions between 10 and 8 cal ka BP, corresponding to the early Holocene Thermal Maximum. The slope of the δ²H–δ¹⁸O regression line is close to the global meteoric water line. This suggests the preservation of winter precipitation signal in the ice wedge with minor isotope transformation. The low range of stable isotope values in the ice wedge indicates quite stable winter climate conditions, favorable to ice wedge growth. Reconstructed mean winter air temperature was close to modern, but it is assumed that air temperature of the coldest winter month was lower and more stable than at present.

中文翻译：

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基于冰楔稳定同位素记录的东欧平原东北部全新世最佳时期的冬季气温

早全新世冬季的气温已经重建了使用稳定同位素的东欧平原的东北部（δ ¹⁸ O和δ ² 2H）同生冰楔的记录。我们显示出，这里的冰楔与泥炭地的积聚活跃地同步增长，泥炭地积聚在10和8 cal ka BP之间的沼泽和森林洼地中，这对应于全新世早期的热最大值。的δ的斜率² H-δ ¹⁸O回归线接近全球大气水线。这表明通过少量同位素转换可以保留冰楔中的冬季降水信号。冰楔中稳定同位素值的低范围表示冬季气候条件非常稳定，有利于冰楔的生长。重建后的冬季平均气温接近现代水平，但可以认为冬季最冷月份的气温比目前更低且更稳定。