气候变化领域集成服务门户(CCPortal): Spatial homogenization of soil-surface pollen assemblages improves the reliability of pollen-climate calibration-set

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DOI	10.1007/s11430-019-9643-0
	Spatial homogenization of soil-surface pollen assemblages improves the reliability of pollen-climate calibration-set
	Tian, Fang; Cao, Xianyong; Zhang, Ran; Xu, Qinghai; Ding, Wei; Liu, Xingqi; Pan, Baolin; Chen, Jianhui
通讯作者	Tian, F (通讯作者)
发表日期	2020
ISSN	1674-7313
EISSN	1869-1897
起始页码	1758
结束页码	1766
卷号	63 期号:11
英文摘要	To make a reliable reconstruction of past climate from soil-surface modern pollen, it is necessary to reduce the sources of error. In this paper, pollen percentages of the sub-continental scale modern pollen-climate dataset from China and Mongolia (with 68% soil-surface samples) are homogenized at various spatial scales. A tailored calibration-set is then applied to lake sediment-surface pollen assemblages from north-central China to evaluate their predictive power. Results indicate that spatial homogenization of modern pollen percentages can increase the proportion of inertia explained by climatic variables in CCA and improve the model performance of leave-one-out cross-validation using WA-PLS. Soil-surface pollen assemblages can thus be employed into a calibration-set for reliable climate estimation and they perform better when the calibration-set has been locally homogenized. Small-scale (e.g., radii 2, 5, or 10 km) homogenization reduces the local noise in soil-surface pollen assemblages and improves the cross-validated performance, while broader scale homogenization (more than 20 km radius) blurs the pollen-climate relationship. Lake sediment-surface pollen assemblages from close to the shore could contain pollen grains transported by rivers or from the shore vegetation and thus fail to represent regional climate well like the assemblages from the central part and deep-water area of lake.
关键词	ASIAN SUMMER MONSOON QUANTITATIVE RECONSTRUCTION TIBETAN PLATEAU LAKE-SEDIMENTS DAIHAI LAKE VEGETATION MONGOLIA RECORD CHINA AREA
英文关键词	North-central China; Soil-surface pollen; Climate reconstruction; WA-PLS
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000554333500003
来源期刊	SCIENCE CHINA-EARTH SCIENCES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259991
推荐引用方式 GB/T 7714	Tian, Fang,Cao, Xianyong,Zhang, Ran,et al. Spatial homogenization of soil-surface pollen assemblages improves the reliability of pollen-climate calibration-set[J]. 中国科学院青藏高原研究所,2020,63(11).
APA	Tian, Fang.,Cao, Xianyong.,Zhang, Ran.,Xu, Qinghai.,Ding, Wei.,...&Chen, Jianhui.(2020).Spatial homogenization of soil-surface pollen assemblages improves the reliability of pollen-climate calibration-set.SCIENCE CHINA-EARTH SCIENCES,63(11).
MLA	Tian, Fang,et al."Spatial homogenization of soil-surface pollen assemblages improves the reliability of pollen-climate calibration-set".SCIENCE CHINA-EARTH SCIENCES 63.11(2020).