气候变化领域集成服务门户(CCPortal): Holocene sea level reconstruction using lagoon specific local marine reservoir effect and geophysical modeling in Tongatapu; Kingdom of Tonga

CCPortal

DOI	10.1016/j.quascirev.2020.106464
	Holocene sea level reconstruction using lagoon specific local marine reservoir effect and geophysical modeling in Tongatapu; Kingdom of Tonga
	Fukuyo N.; Clark G.; Purcell A.; Parton P.; Yokoyama Y.
发表日期	2020
ISSN	0277-3791
卷号	244
英文摘要	Reconstructing the history of Holocene relative sea levels around Tonga provides essential constraints on the recent geological evolution of this region and paleoenvironmental context for archaeological studies. However, few sea level records are currently available in the region, and no quantitative paleoenvironmental studies using geochemical or geophysical methods have been reported. Here, we reconstruct the sea level history of Tongatapu Island using radiocarbon measurements and glacio-hydro-isostatic adjustment (GIA) modeling. Our analyses reconstructing the evolution of the lagoon suggest that the average size of Gafrarium tumidum decreased synchronously with corresponding changes in the paleoenvironment. These changes also correspond to the increasing trend of the lagoon specific local marine reservoir ages (ΔRlagoon) from 219 ± 78 to 368 ± 69 years between ∼2.6 and 0.4 ka. Sea surface salinity (SSS) decline within Fanga ’Uta lagoon was also synchronous with these changes caused by a gradual decrease in the exchange of water in and out of the lagoon. Estimated SSS from shell was somewhat higher ca. 2.6 cal kyr B.P. than the present, suggesting that the lagoon was relatively open to the ocean at that time. Our GIA modeling predicts mid-Holocene sea level highstand (HHS) was less than 1 m above the present sea level in Tongatapu, suggesting that previously reported observations of an HHS require additional contributions, perhaps from crustal uplift. Furthermore, recent GNSS observations of vertical uplift rates at Tongatapu are an order of magnitude higher than the long-term uplift rate obtained from Holocene sea level data. © 2020 Elsevier Ltd
英文关键词	Bivalves; GIA modeling; Holocene; Local marine reservoir effect; Paleoenvironmental studies; Paleogeography; Southern pacific
语种	英语
scopus关键词	Geophysics; Lakes; Reservoirs (water); Archaeological studies; Geological evolution; Geophysical methods; Geophysical modeling; Marine reservoir effects; Paleoenvironmental study; Relative sea level; Sea surface salinity; Sea level; archaeology; coastal lagoon; geophysical method; GNSS; highstand; Holocene; marine environment; paleoenvironment; radiocarbon dating; reconstruction; reservoir; sea level change; uplift; water exchange; Tonga; Tongatapu; Bivalvia; Gafrarium tumidum; Uta
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151352
作者单位	Atmosphere Ocean Research Institute, University of Tokyo, Chiba, Japan; Department of Earth and Planetary Sciences, Faculty of Science, University of Tokyo, Tokyo, Japan; College of Asia and the Pacific, Australian National University, Canberra, Australia; Research School of Earth Sciences, The Australian National University, Canberra, Australia; Department of Biogeochemistry, Japan Agency for Marine-Earth Science and Technology, Japan; Graduate Program on Environmental Sciences, The University of Tokyo, Tokyo, Japan
推荐引用方式 GB/T 7714	Fukuyo N.,Clark G.,Purcell A.,et al. Holocene sea level reconstruction using lagoon specific local marine reservoir effect and geophysical modeling in Tongatapu; Kingdom of Tonga[J],2020,244.
APA	Fukuyo N.,Clark G.,Purcell A.,Parton P.,&Yokoyama Y..(2020).Holocene sea level reconstruction using lagoon specific local marine reservoir effect and geophysical modeling in Tongatapu; Kingdom of Tonga.Quaternary Science Reviews,244.
MLA	Fukuyo N.,et al."Holocene sea level reconstruction using lagoon specific local marine reservoir effect and geophysical modeling in Tongatapu; Kingdom of Tonga".Quaternary Science Reviews 244(2020).