CCPortal
DOI10.1016/j.quascirev.2017.10.030
Impacts of the spatial extent of pollen-climate calibration-set on the absolute values, range and trends of reconstructed Holocene precipitation
Cao, Xianyong; Tian, Fang; Telford, Richard J.; Ni, Jian; Xu, Qinghai; Chen, Fahu; Liu, Xingqi; Stebich, Martina; Zhao, Yan; Herzschuh, Ulrike
发表日期2017
ISSN0277-3791
卷号178页码:37-53
英文摘要

Pollen-based quantitative reconstructions of past climate variables is a standard palaeoclimatic approach. Despite knowing that the spatial extent of the calibration-set affects the reconstruction result, guidance is lacking as to how to determine a suitable spatial extent of the pollen-climate calibration-set. In this study, past mean annual precipitation (P-ann) during the Holocene (since 11.5 cal ka BP) is reconstructed repeatedly for pollen records from Qinghai Lake (36.7 degrees N, 100.5 degrees E; north-east Tibetan Plateau), Gonghai Lake (38.9 degrees N, 112.2 degrees E; north China) and Sihailongwan Lake (42.3 degrees N, 126.6 degrees E; north-east China) using calibration-sets of varying spatial extents extracted from the modern pollen dataset of China and Mongolia (2559 sampling sites and 168 pollen taxa in total). Results indicate that the spatial extent of the calibration-set has a strong impact on model performance, analogue quality and reconstruction diagnostics (absolute value, range, trend, optimum). Generally, these effects are stronger with the modern analogue technique (MAT) than with weighted averaging partial least squares (WA-PLS). With respect to fossil spectra from northern China, the spatial extent of calibration-sets should be restricted to radii between ca. 1000 and 1500 km because small-scale calibration-sets (<800 km radius) will likely fail to include enough spatial variation in the modern pollen assemblages to reflect the temporal range shifts during the Holocene, while too broad a scale calibration-set (>1500 km radius) will include taxa with very different pollen-climate relationships. (C) 2017 Elsevier Ltd. All rights reserved.


英文关键词Analogue quality;Statistical significance;Cross-validation;Holocene;Climate reconstruction;WA-PLS;MAT
语种英语
WOS研究方向Physical Geography ; Geology
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号WOS:000418974100004
来源期刊QUATERNARY SCIENCE REVIEWS
来源机构兰州大学 ; 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/1749
推荐引用方式
GB/T 7714
Cao, Xianyong,Tian, Fang,Telford, Richard J.,et al. Impacts of the spatial extent of pollen-climate calibration-set on the absolute values, range and trends of reconstructed Holocene precipitation[J]. 兰州大学, 中国科学院青藏高原研究所,2017,178:37-53.
APA Cao, Xianyong.,Tian, Fang.,Telford, Richard J..,Ni, Jian.,Xu, Qinghai.,...&Herzschuh, Ulrike.(2017).Impacts of the spatial extent of pollen-climate calibration-set on the absolute values, range and trends of reconstructed Holocene precipitation.QUATERNARY SCIENCE REVIEWS,178,37-53.
MLA Cao, Xianyong,et al."Impacts of the spatial extent of pollen-climate calibration-set on the absolute values, range and trends of reconstructed Holocene precipitation".QUATERNARY SCIENCE REVIEWS 178(2017):37-53.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Cao, Xianyong]的文章
[Tian, Fang]的文章
[Telford, Richard J.]的文章
百度学术
百度学术中相似的文章
[Cao, Xianyong]的文章
[Tian, Fang]的文章
[Telford, Richard J.]的文章
必应学术
必应学术中相似的文章
[Cao, Xianyong]的文章
[Tian, Fang]的文章
[Telford, Richard J.]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。