Dissertation of Mr. Thomas Gouriou: "The change in the components of the sea level based on tide gauge observations made since the end of the 18th century in Charente-Maritime" available on-line on REFMAR

 

Thomas Gouriou's dissertation, defended on Monday 26 March 2012 at the University of La Rochelle, on the subject of l'Université de La Rochelle the change in the components of the sea level based on tide gauge observations made since the end of the 18th century in Charente-Maritime can be found on-line on REFMAR

 

The mole of the port of Bourcefranc-le-Chapus with, in the background, Fort Louvois where tide gauge observations were made nearby in the 19th and 20th centuries (Photo credits N. Pouvreau, August 2009)

The mole of the port of Bourcefranc-le-Chapus with, in the background, Fort Louvois where tide gauge observations were made nearby in the 19th and 20th centuries (Photo credits N. Pouvreau, August 2009)

 

This considerable work, acclaimed by the members of the dissertation committee, is available in two volumes (in french):

 

Couverture Manuscrit Thèse Gouriou 2012

Volume 1 : Dissertation manuscript

                                              Couverture Annexes Thèse Gouriou 2012Volume 2 : Annexes to the dissertation
 
 
The visual support is also available by clicking on the presentation slide below (in french):
 
Copie écran diapo 1 présentation des travaux de thèse de Thomas Gouriou (2012)
 
 

His research, combining Science and history, was supervised by Mr. Guy Wöppelmann, Senior lecturer, HDR. Naturally, the French Navy's hydrographic and oceanographic service (SHOM), as the national observation reference body concerning the sea level, was a partner in this work, from both the scientific and technical points of view. Thus, Mr. Gouriou was able, in particular, to use the inventory of the paper tide gauge archives available in the French archiving centres and had access to the tide gauging archives preserved in SHOM.

 

Marigrams (photo on left) and an example of a water height measurement preserved in SHOM's archives and used for the work on this dissertation (Photo credits SHOM, 2010) Registre_Hauteur_d'eau_Fort_Boyard_février_1879_Crédits-SHOM_2010.JPG

Marigrams (photo on left) and an example of a water height measurement preserved in SHOM's archives and used for the work on this dissertation (Photo credits SHOM, 2010)

 

It should be noted that the mean sea level obtained during this work is +1.37 ± 0.08 mm/year in the Antioche straits over the period 1860-2010. It is consistent with that determined – in the same type of study – using the longest series of tide gauge readings available along France's Atlantic seaboard: Brest with +1.28 ± 0.08 mm/year (source).

 

Fort-Boyard at the beginning of the 20th century, which was a SHOM tide gauging observatory from 1873 to 1909 (Photo credits unknown, 1900-1920)

Fort-Boyard at the beginning of the 20th century, which was a SHOM tide gauging observatory from 1873 to 1909 (Photo credits unknown, 1900-1920)

 

The temporal series thus reconstructed are in the process of being made available on the REFMAR portal. As for the mean levels, they will be available on the SONEL and PSMSL sites.

 

 

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