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DOI10.1007/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
ISSN1674-7313
EISSN1869-1897
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 MONSOONQUANTITATIVE RECONSTRUCTIONTIBETAN PLATEAULAKE-SEDIMENTSDAIHAI LAKEVEGETATIONMONGOLIARECORDCHINAAREA
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).
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