气候变化领域集成服务门户(CCPortal): The 4.2 ka event, ENSO, and coral reef development

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DOI	10.5194/cp-15-105-2019
	The 4.2 ka event, ENSO, and coral reef development
	Toth L.T.; Aronson R.B.
发表日期	2019
ISSN	18149324
起始页码	105
结束页码	119
卷号	15 期号:1
英文摘要	Variability of sea-surface temperature related to shifts in the mode of the El Nino-Southern Oscillation (ENSO) has been implicated as a possible forcing mechanism for the global-scale changes in tropical and subtropical precipitation known as the 4.2 ka event.We review records of coral reef development and paleoceanography from the tropical eastern Pacific (TEP) to evaluate the potential impact of the 4.2 ka event on coral reefs. Our goal is to identify the regional climatic and oceanographic drivers of a 2500-year shutdown of vertical reef accretion in the TEP after 4.2 ka. The 2500-year hiatus represents 40%of the Holocene history of reefs in the TEP and appears to have been tied to increased variability of ENSO. When ENSO variability abated approximately 1.7-1.6 ka, coral populations recovered and vertical accretion of reef framework resumed apace. There is some evidence that the 4.2 ka event suppressed coral growth and reef accretion elsewhere in the Pacific Ocean as well. Although the ultimate causality behind the global 4.2 ka event remains elusive, correlations between shifts in ENSO variability and the impacts of the 4.2 ka event suggest that ENSO could have played a role in climatic changes at that time, at least in the tropical and subtropical Pacific. We outline a framework for testing hypotheses of where and under what conditions ENSO may be expected to have impacted coral reef environments around 4.2 ka. Although most studies of the 4.2 ka event have focused on terrestrial environments, we suggest that understanding the event in marine systems may prove to be the key to deciphering its ultimate cause. © Author(s) 2019. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	climate forcing; coral reef; correlation; El Nino-Southern Oscillation; global change; Holocene; paleoceanography; paleoclimate; precipitation (climatology); sea surface temperature; subtropical region; tropical environment; Pacific Ocean; Anthozoa
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/153227
作者单位	US Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL 33701, United States; Department of Ocean Engineering and Marine Sciences, Florida Institute of Technology, Melbourne, FL 32901, United States
推荐引用方式 GB/T 7714	Toth L.T.,Aronson R.B.. The 4.2 ka event, ENSO, and coral reef development[J],2019,15(1).
APA	Toth L.T.,&Aronson R.B..(2019).The 4.2 ka event, ENSO, and coral reef development.Climate of the Past,15(1).
MLA	Toth L.T.,et al."The 4.2 ka event, ENSO, and coral reef development".Climate of the Past 15.1(2019).