About IGSNRR
News
Research
People
International Cooperation
Education & Training
Publications
Facilities
Journals
Library
Scientific Database
Hosted Societies
Eye on Chinese Geography
Links
Location: Home > Publications > New Papers
Paper Code  
Title   A novel procedure for pollen-based quantitative paleoclimate reconstructions and its application in China
Authors   Chen JianHui; Lv FeiYa; Huang XiaoZhong; Birks H. John B. etc.
Corresponding Author  
Year   2017
Title of Journal  
Volume   SCIENCE CHINA-EARTH SCIENCES
Number  
Page  
Abstract   Traditionally, the evaluation of pollen-based quantitative paleoclimate reconstructions focuses on the ability of calibration sets to infer present climatic conditions and/or the similarity between fossil and modern assemblages. Objective criteria for choosing the most appropriate climate parameter(s) to be reconstructed at a specific site are thus lacking. Using a novel approach for testing the statistical significance of a quantitative reconstruction using random environmental data, in combination with the advantageous large environmental gradients, abundant vegetation types and comprehensive modern pollen databases in China, we describe a new procedure for pollen-based quantitative paleoclimatic reconstructions. First, the most significant environmental variable controlling the fossil pollen assemblage changes is identified. Second, a calibration set to infer changes in this targeted variable is built up, by limiting the modern ranges of other environmental variables. Finally, the pollen-based quantitative reconstruction is obtained and its statistical significance assessed. This novel procedure was used to reconstruct the mean annual precipitation (P-ann) from Gonghai Lake in the Lvliang Mountains, and Tianchi Lake in the Liupan Mountains, on the eastern and western fringe of the Chinese Loess Plateau, respectively. Both P-ann reconstructions are statistically significant (p<0.001), and a sound and stable correlation relationship exists in their common period, showing a rapid precipitation decrease since 3300 cal yr BP. Thus, we propose that this procedure has great potential for reducing the uncertainties associated with pollen-based quantitative paleoclimatic reconstructions in China.
Full Text  
Full Text Link       
Classification: SCI
Source:
Title of Journal: SCIENCE CHINA-EARTH SCIENCES
Download:
Copyright © Institute of Geographic Sciences and Natural Resources Research, CAS
Address: 11A, Datun Road ,Chaoyang District, Beijing, 100101, China   Email: weboffice@igsnrr.ac.cn