Climate in northern Eurasia 6000 years ago reconstructed from pollen data
Climate in northern Eurasia 6000 years ago reconstructed from pollen data
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DOI：
10.1016/s0012-821x(99)00171-5
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发表时间：
1999-09
影响因子：
5.3
通讯作者：
P. Tarasov;P. Tarasov;J. Guiot;R. Cheddadi;Andrei A. Andreev;L. G. Bezus'ko;T. A. Blyakharchuk;N. Dorofeyuk;L. Filimonova;V. Volkova;V. Zernitskaya
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文献类型：
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作者：
P. Tarasov;P. Tarasov;J. Guiot;R. Cheddadi;Andrei A. Andreev;L. G. Bezus'ko;T. A. Blyakharchuk;N. Dorofeyuk;L. Filimonova;V. Volkova;V. Zernitskaya
根据1245个花粉光谱的植物功能型（PFT）得分，采用气候校准方法，对前苏联和蒙古的116个花粉光谱进行了6kaBP的气候重建。结果被呈现为气候异常图和概率类图，显示这些差异与现代气候的重要性。重建的图案在空间上是相干的，但由于通常较大的误差范围，置信水平因区域而异。距今6 ka时，50°N以北的冬季比今天温暖2°C以上，乌拉尔以东的冬季温度更高。夏季也比今天温暖2°C以上，北极圈以北和蒙古中部的信心水平很高。在西伯利亚中纬度地区、哈萨克斯坦北方以及黑海和里海周围，6 ka的夏天比今天要冷得多。在乌克兰、俄罗斯南部和蒙古北方，重建的水分可用性（实际蒸散量与平衡蒸散量之比）比今天高10%以上，蒙古中部比今天低10%以上。这种模式部分对应于重建从湖平面记录的水预算（年降水量减去蒸发量）。
Using a climatic calibration based on the scores of the plant functional types (PFTs) calculated for 1245 surface pollen spectra, the climate at 6 ka BP has been reconstructed for a set of 116 pollen spectra from the former Soviet Union and Mongolia. The results are presented as maps of climatic anomalies and maps of probability classes showing the significance of these differences from the modern climate. The reconstructed patterns are spatially coherent, but have confidence levels that vary from region to region, due to the often-large error ranges. At 6 ka, the winters were more than 2°C warmer than today north of 50°N, with a high significance east of the Urals. Summers were also more than 2°C warmer than today with a high level of confidence north of the Polar Circle and in central Mongolia. In the mid-latitudes of Siberia, in northern Kazakhstan and around the Black and the Caspian seas, 6 ka summers were significantly cooler than today. The reconstructed moisture availability (ratio of actual to equilibrium evapotranspiration) was more than 10% higher than today in the Ukraine, southern Russia and northern Mongolia, and more than 10% lower than today in central Mongolia. This pattern corresponds partly with that of the water budget (annual precipitation minus evaporation) reconstructed from lake level records.