气候变化领域集成服务门户(CCPortal): Lag in response of coastal barrier-island retreat to sea-level rise

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DOI	10.1038/s41561-022-00980-9
	Lag in response of coastal barrier-island retreat to sea-level rise
	Mariotti, Giulio; Hein, Christopher J.
发表日期	2022
ISSN	1752-0894
EISSN	1752-0908
页码	18
英文摘要	The response of coastal barrier islands to relative sea-level rise (SLR) is a long-debated issue. Over centennial and longer periods, regional barrier retreat is generally proportional to the rate of relative SLR. However, over multi-decadal timescales, this simplification does not hold. Field observations along the USA East Coast indicate that barrier retreat rate has at most increased by similar to 45% in the last similar to 100 years, despite a concurrent >= 200% increase in SLR rate. Using a coastal evolution model, we explain this observation by considering disequilibrium dynamics-the lag in barrier behaviour with respect to SLR. Here we show that modern barrier retreat rate is not controlled by recent SLR (last decades), but rather by the baseline SLR of the past centuries. The cumulative effect of the baseline SLR is to establish a potential retreat, which is then realized by storms and tidal processes in the following centuries. When SLR accelerates, the potential for retreat is first realized through removal of geomorphic capital. After several centuries, barrier retreat accelerates proportionally to the increase in SLR. As such, we predict a committed coastal response: even if SLR remains at present rates, barrier retreat in response to SLR will accelerate by similar to 50% within a century. The lag dynamics identified here are probably general, and should be included in predictions of barrier-system response to climate change.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000825387600001
来源期刊	NATURE GEOSCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272643
作者单位	Louisiana State University System; Louisiana State University; Louisiana State University System; Louisiana State University; William & Mary; Virginia Institute of Marine Science
推荐引用方式 GB/T 7714	Mariotti, Giulio,Hein, Christopher J.. Lag in response of coastal barrier-island retreat to sea-level rise[J],2022:18.
APA	Mariotti, Giulio,&Hein, Christopher J..(2022).Lag in response of coastal barrier-island retreat to sea-level rise.NATURE GEOSCIENCE,18.
MLA	Mariotti, Giulio,et al."Lag in response of coastal barrier-island retreat to sea-level rise".NATURE GEOSCIENCE (2022):18.