气候变化领域集成服务门户(CCPortal): Holocene reef growth in the tropical southwestern Atlantic: Evidence for sea level and climate instability

CCPortal

DOI	10.1016/j.quascirev.2019.06.039
	Holocene reef growth in the tropical southwestern Atlantic: Evidence for sea level and climate instability
	Dechnik B.; Bastos A.C.; Vieira L.S.; Webster J.M.; Fallon S.; Yokoyama Y.; Nothdurft L.; Sanborn K.; Batista J.; Moura R.; Amado-Filho G.
发表日期	2019
ISSN	0277-3791
起始页码	365
结束页码	377
卷号	218
英文摘要	The Holocene epoch offers a potential analogue for understanding future sea-level variability as both SST's and Global Mean Sea Levels (GMSL) were at times higher than observed today. However, GMSL can differ significantly from Relative Sea Level (RSL), even at far-field sites remote from margins of former ice sheets. Much of this spatial variability has been shown to be consistent with the predictions of glacial isostatic adjustment (GIA) models. Whilst it is generally accepted that RSL at far-field sites reached its maximum during the mid-Holocene, there have been many interpretations of sea level fall following the highstand from ∼6 ka. Here, we present a RSL history from several tectonically stable, far-field sites in eastern Brazil, derived from 17 microatoll and 45 fossil reef flat ages. Our results show evidence for two periods of RSL instability during the Holocene which differ from GIA predictions, including a hiatus in reef growth ∼3.7–2.5 ka. These results are broadly synchronous with several other locations in the Southern Hemisphere suggesting global rather than regional climatic forcing mechanisms are responsible. Variations in SST and southern hemisphere ice sheet dynamics are proposed as possible controlling mechanisms for the observed RSL oscillations beginning at ∼3.7 ka and 2 ka respectively. We suggest that these global processes combined with increased precipitation (and higher sediment flux) from several regional climatic forces created inhospitable conditions for reef growth, contributing to the observed hiatus and reduced reef flat accretion during the late Holocene (∼2 ka to present). © 2019 Elsevier Ltd
英文关键词	Abrolhos; Fossil reef; Holocene; Microatoll; Reef hiatus; Sea level
语种	英语
scopus关键词	Glacial geology; Glaciers; Reefs; Tropics; Abrolhos; Fossil reefs; Glacial isostatic adjustment; Global mean sea levels; Holocenes; Microatoll; Sea level variability; Southwestern Atlantic; Sea level; atoll; climate change; climate forcing; climate oscillation; coral reef; fossil record; glacioisostasy; hiatus; Holocene; ice sheet; sea level; spatial variation; Atlantic Ocean; Atlantic Ocean (Southwest)
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/151839
作者单位	Department of Oceanography, Federal University of Espirito Santo, Vitoria, ES-CEP-29075-910, Brazil; Geocoastal Research Group, School of Geosciences, University of SydneyNSW 2006, Australia; School of Earth Sciences, Australian National UniversityACT 0200, Australia; Department of Earth and Planetary Sciences, University of Tokyo, Tokyo, 113-0033, Japan; School of Earth, Environment and Biological Sciences, Queensland University of TechnologyQLD 4000, Australia; Instituto de Biologia and SAGE/COPPE, Universidade Federal do Rio de JaneiroRJ 21944-970, Brazil; Instituto de Pesquisas Jardim Botânico do Rio de JaneiroRJ 22460-030, Brazil
推荐引用方式 GB/T 7714	Dechnik B.,Bastos A.C.,Vieira L.S.,et al. Holocene reef growth in the tropical southwestern Atlantic: Evidence for sea level and climate instability[J],2019,218.
APA	Dechnik B..,Bastos A.C..,Vieira L.S..,Webster J.M..,Fallon S..,...&Amado-Filho G..(2019).Holocene reef growth in the tropical southwestern Atlantic: Evidence for sea level and climate instability.Quaternary Science Reviews,218.
MLA	Dechnik B.,et al."Holocene reef growth in the tropical southwestern Atlantic: Evidence for sea level and climate instability".Quaternary Science Reviews 218(2019).