气候变化领域集成服务门户(CCPortal): A proxy modelling approach to assess the potential of extracting ENSO signal from tropical Pacific planktonic foraminifera

CCPortal

DOI	10.5194/cp-16-885-2020
	A proxy modelling approach to assess the potential of extracting ENSO signal from tropical Pacific planktonic foraminifera
	Metcalfe B.; Lougheed B.C.; Waelbroeck C.; Roche D.M.
发表日期	2020
ISSN	18149324
起始页码	885
结束页码	910
卷号	16 期号:3
英文摘要	A complete understanding of past El Niño– Southern Oscillation (ENSO) fluctuations is important for the future predictions of regional climate using climate models. One approach to reconstructing past ENSO dynamics uses planktonic foraminifera as recorders of past climate to assess past spatio-temporal changes in upper ocean conditions. In this paper, we utilise a model of planktonic foraminifera populations, Foraminifera as Modelled Entities (FAME), to forward model the potential monthly average 18Oc and temperature signal proxy values for Globigerinoides ruber, Globigerinoides sacculifer, and Neogloboquadrina dutertrei from input variables covering the period of the instrumental record. We test whether the modelled foraminifera population 18Oc and Tc associated with El Niño events statistically differ from the values associated with other climate states. Provided the assumptions of the model are correct, our results indicate that the values of El Niño events can be differentiated from other climate states using these species. Our model computes the proxy values of foraminifera in the water, suggesting that, in theory, water locations for a large portion of the tropical Pacific should be suitable for differentiating El Niño events from other climate states. However, in practice it may not be possible to differentiate climate states in the sediment record. Specifically, comparison of our model results with the sedimentological features of the Pacific Ocean shows that a large portion of the hydrographically/ecologically suitable water regions coincide with low sediment accumulation rate at the sea floor and/or of sea floor that lie below threshold water depths for calcite preservation. © 2020 Georg Thieme Verlag. All rights reserved.
语种	英语
scopus关键词	accumulation rate; El Nino-Southern Oscillation; foraminifera; seafloor; sediment analysis; sedimentology; upper ocean; Pacific Ocean; Pacific Ocean (Tropical); Foraminifera; Globigerinoides ruber; Globigerinoides sacculifer; Neogloboquadrina dutertrei
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146712
作者单位	Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, 91191, France; Earth and Climate Cluster, Department of Earth Science, Faculty of Science, Vrije Universiteit Amsterdam, de Boelelaan 1085, Amsterdam, 1081 HV, Netherlands; Department of Earth Sciences, Uppsala University, Villavägen 16, Uppsala, 75236, Sweden
推荐引用方式 GB/T 7714	Metcalfe B.,Lougheed B.C.,Waelbroeck C.,et al. A proxy modelling approach to assess the potential of extracting ENSO signal from tropical Pacific planktonic foraminifera[J],2020,16(3).
APA	Metcalfe B.,Lougheed B.C.,Waelbroeck C.,&Roche D.M..(2020).A proxy modelling approach to assess the potential of extracting ENSO signal from tropical Pacific planktonic foraminifera.Climate of the Past,16(3).
MLA	Metcalfe B.,et al."A proxy modelling approach to assess the potential of extracting ENSO signal from tropical Pacific planktonic foraminifera".Climate of the Past 16.3(2020).