气候变化领域集成服务门户(CCPortal): Pollen data and pollen-based climate reconstruction for the KTK1 pollen record from Lake Kotokel

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DOI	https://doi.org/10.1594/PANGAEA.718105
	Pollen data and pollen-based climate reconstruction for the KTK1 pollen record from Lake Kotokel
	Tarasov; Pavel E; Bezrukova; Elena V; Krivonogov; Sergey K
发布日期	2009-06-11
数据集类型	dataset
英文简介	In this study a radiocarbon-dated pollen record from Lake Kotokel (52°47' N, 108°07' E, 458 m a.s.l.) located in southern Siberia east of Lake Baikal was used to derive quantitative characteristics of regional vegetation and climate from about 15 kyr BP (1 kyr = 1000 cal. yr) until today. Quantitative reconstruction of the late glacial vegetation and climate dynamics suggests that open steppe and tundra communities predominated in the study area prior to ca. 13.5 kyr BP and again during the Younger Dryas interval, between 12.8 and 11.6 kyr BP. The pollen-based climate reconstruction suggests lower-than-present mean January (~ -38 °C) and July (~ 12 °C) temperatures and annual precipitation (~ 270-300 mm) values during these time intervals. Boreal woodland replaced the primarily open landscape around Kotokel three times at about 14.8-14.7 kyr BP, during the Allerød Interstadial between 13.3-12.8 kyr BP and with the onset of the Holocene interglacial between 11.5 and 10.5 kyr BP, presumably in response to a noticeable increase in precipitation, and in July and January temperatures. The maximal spread of the boreal forest (taiga) communities in the region is associated with a warmer and wetter-than-present climate (Tw ~ 17-18 °C, Tc ~ -19 °C, Pann ~ 500-550 mm) that occurred ca. 10.8-7.3 kyr BP. During this time interval woody vegetation covered more than 50 % of the area within a 21x21 km window around the lake. The pollen-based best modern analogue reconstruction suggests a decrease in woody cover percentages and in all climatic variables about 7-6.5 kyr BP. Our results demonstrate a gradual decrease in precipitation and mean January temperature towards their present-day values in the region around Lake Kotokel since that time.
空间范围	Latitude: 52.792800 * Longitude: 108.124400
时间范围	2007-07-15T00:00:00 - 2007-07-15T00:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/224092
推荐引用方式 GB/T 7714	Tarasov,Pavel E,Bezrukova,et al. Pollen data and pollen-based climate reconstruction for the KTK1 pollen record from Lake Kotokel.2009-06-11.https://doi.org/10.1594/PANGAEA.718105.