Global reconstructed daily surge levels from the 20th Century Reanalysis (1871-2010)

Type Article
Date 2017-01
Language English
Author(s) Cid AlbaORCID1, Camus PaulaORCID1, Castanedo Sonia2, Mendez Fernando J.2, Medina RaulORCID1
Affiliation(s) 1 : Environmental Hydraulics Institute,“IH Cantabria”, Universidad de Cantabria, Spain
2 : Departamento de Ciencias y Técnicas del agua y del Medio Ambiente, Universidad de Cantabria, Spain
Source Global And Planetary Change (0921-8181) (Elsevier), 2017-01 , Vol. 148 , P. 9-21
DOI 10.1016/j.gloplacha.2016.11.006
WOS© Times Cited 34
Keyword(s) Climate variability, Multiple linear regression, Statistical modelling, Storm surge, Historical reconstruction
Abstract

Studying the effect of global patterns of wind and pressure gradients on the sea level variation (storm surge) is a key issue in understanding the recent climate change effect on the dynamical state of the ocean. The analysis of the spatial and temporal variability of storm surges from observations is a difficult task to accomplish since observations are not homogeneous in time, scarce in space, and moreover, their temporal coverage is limited. A recent global surge database developed by AVISO (DAC, Dynamic Atmospheric Correction) fulfilled the lack of data in terms of spatial coverage, but not regarding time extent, since it only includes the last two decades (1992-2014). In this work, we use the 20th Century Reanalysis V2 (20CR), which spans the years 1871 to 2010, to statistically reconstruct daily maximum surge levels at a global scale. A multivariate linear regression model is fitted between daily mean ERA-interim sea level pressure fields and daily maximum surge levels from DAC. Following, the statistical model is used to reconstruct daily surges using mean sea level pressure fields from 20CR. The verification of the statistical model shows good agreements between DAC levels and the reconstructed surge levels from the 20CR. The validation of the reconstructed surge with tide gauges, distributed throughout the domain, shows good accuracy both in terms of high correlations and small errors. A time series comparison is also depicted at specific tide gauges for the beginning of the 20th century, showing a high concordance. Therefore, this work provides to the scientific community, a daily database of maximum surge levels; which correspond to an extension of the DAC database, from 1871 to 2010. This database can be used to improve the knowledge on historical storm surge conditions, allowing the study of their temporal and spatial variability.

Full Text
File Pages Size Access
13 4 MB Access on demand
Author's final draft 30 10 MB Open access
Top of the page