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DOI10.1016/j.quascirev.2019.105917
The impact of proxy selection strategies on a millennium-long ensemble of hydroclimatic records in Monsoon Asia
Schneider, Lea; Ljungqvist, Fredrik Charpentier; Yang, Bao; Chen, Fahu; Chen, Jianhui; Li, Jianyong; Hao, Zhixin; Ge, Quansheng; Talento, Stefanie; Osborn, Timothy J.; Luterbacher, Juerg
通讯作者Schneider, L (通讯作者)
发表日期2019
ISSN0277-3791
卷号223
英文摘要Large-scale palaeoclimate reconstructions can be very sensitive to the proxy records they are based on, and hence to the criteria used to select proxy records. Data selection rarely follows objective criteria that are applicable to all types of proxies, including both low- and high-resolution records. Thus, there is a need for a uniform and transparent approach to assess the suitability of input proxy data for a reconstruction. Here, we develop classification criteria that are applicable to multiple proxy types and evaluate different selection strategies using a network of 62 millennium-long terrestrial hydroclimate proxy records from Monsoon Asia. Our results reveal that robust evidence for a coherent climate signal and high dating accuracy are important criteria for benchmarking the suitability of each proxy record. We determine these criteria by reviewing the literature for each record (rather than screening against instrumental data). We show that the proposed selection approach can yield a network with a stronger common signal. By evaluating the uncertainty and centennial variability of composite reconstructions, from differently selected subsets of the proxy network, it appears beneficial to use suitable proxies stemming from different archives, as well as having a dense network of proxy sites. We suggest that future large-scale palaeoclimate reconstructions might be improved by evaluating proxy networks according to the universal categories presented here and, if indicated, removing less suitable records. This will strengthen the climate signal in the final reconstruction, allowing more precise inferences about past climate variability and more robust comparisons with climate model simulations. (C) 2019 Elsevier Ltd. All rights reserved.
关键词NORTHERN-HEMISPHERE TEMPERATURETIBETAN PLATEAUSUMMER MONSOONCENTRAL CHINALATE-HOLOCENETREE-RINGSICE-AGEPRECIPITATION VARIABILITYSTREAMFLOW RECONSTRUCTIONCLIMATIC VARIABILITY
英文关键词Holocene; Paleoclimatology; Eastern Asia; Data treatment; Large-scale reconstruction; Low resolution; Expert assessment; Spatial decorrelation length; Multi-proxy; Past millennium
语种英语
WOS研究方向Physical Geography ; Geology
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号WOS:000493220300011
来源期刊QUATERNARY SCIENCE REVIEWS
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/259647
推荐引用方式
GB/T 7714
Schneider, Lea,Ljungqvist, Fredrik Charpentier,Yang, Bao,et al. The impact of proxy selection strategies on a millennium-long ensemble of hydroclimatic records in Monsoon Asia[J]. 中国科学院青藏高原研究所,2019,223.
APA Schneider, Lea.,Ljungqvist, Fredrik Charpentier.,Yang, Bao.,Chen, Fahu.,Chen, Jianhui.,...&Luterbacher, Juerg.(2019).The impact of proxy selection strategies on a millennium-long ensemble of hydroclimatic records in Monsoon Asia.QUATERNARY SCIENCE REVIEWS,223.
MLA Schneider, Lea,et al."The impact of proxy selection strategies on a millennium-long ensemble of hydroclimatic records in Monsoon Asia".QUATERNARY SCIENCE REVIEWS 223(2019).
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