气候变化领域集成服务门户(CCPortal): Probabilistic structure of events controlling the after-storm recovery of coastal dunes

CCPortal

DOI	10.1073/pnas.2013254118
	Probabilistic structure of events controlling the after-storm recovery of coastal dunes
	Rinaldo T.; Ramakrishnan K.A.; Rodriguez-Iturbe I.; Vinent O.D.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:1
英文摘要	Coastal dunes protect beach communities and ecosystems from rising seas and storm flooding and influence the stability of barrier islands by preventing overwashes and limiting barrier migration. Therefore, the degree of dune recovery after a large storm provides a simple measure of the short-term resiliency (and potential long-term vulnerability) of barrier islands to external stresses. Dune recovery is modulated by low-intensity/high-frequency high-water events (HWEs), which remain poorly understood compared to the low-frequency extreme events eroding mature dunes and dominating the short-term socio-economic impacts on coastal communities. Here, we define HWEs and analyze their probabilistic structure using time series of still-water level and deep-water wave data from multiple locations around the world. We find that HWEs overtopping the beach can be modeled as a marked Poisson process with exponentially distributed sizes or marks and have a mean size that varies surprisingly little with location. This homogeneity of global HWEs is related to the distribution of the extreme values of a wave-runup parameter, HR= √HsL0, defined in terms of deep-water significant wave height Hs and peak wavelength L0. Furthermore, the characteristic beach elevation at any given location seems to be tied to a constant HWE frequency of about one event per month, which suggests a stochastic dynamics behind beach stabilization. Our results open the door to the development of stochastic models of beach, dune, and barrier dynamics, as well as a better understanding of wave-driven nuisance flooding. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Beach dynamics; Dune recovery; High water event; Marked Poisson process; Wave runup
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160674
作者单位	Rinaldo, T., Department of Ocean Engineerin, Texas A&M University, College Station, TX 77843-3136, United States; Ramakrishnan, K.A., Department of Ocean Engineerin, Texas A&M University, College Station, TX 77843-3136, United States; Rodriguez-Iturbe, I., Department of Ocean Engineerin, Texas A&M University, College Station, TX 77843-3136, United States; Vinent, O.D., Department of Ocean Engineerin, Texas A&M University, College Station, TX 77843-3136, United States
推荐引用方式 GB/T 7714	Rinaldo T.,Ramakrishnan K.A.,Rodriguez-Iturbe I.,et al. Probabilistic structure of events controlling the after-storm recovery of coastal dunes[J],2021,118(1).
APA	Rinaldo T.,Ramakrishnan K.A.,Rodriguez-Iturbe I.,&Vinent O.D..(2021).Probabilistic structure of events controlling the after-storm recovery of coastal dunes.Proceedings of the National Academy of Sciences of the United States of America,118(1).
MLA	Rinaldo T.,et al."Probabilistic structure of events controlling the after-storm recovery of coastal dunes".Proceedings of the National Academy of Sciences of the United States of America 118.1(2021).