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Ecoregional and temporal dynamics of dugong habitat use in a complex coral reef lagoon ecosystem

Mobile marine species display complex and nonstationary habitat use patterns that require understanding to design effective management measures. In this study, the spatio-temporal habitat use…
Figure 1 Interpolated dugong GPS tracks recorded in 2012, 2013 and 2019 over the west coast of New Caledonia, South Pacific. The 16 tracks are split in different colors depending on the ecoregion they are in. Ecoregions identified through hierarchical clustering of environmental lagoon characteristics are represented with colored polygons. Ecoregion 3 is divided into two separate parts, one to the north of ecoregion 2 and another in between ecoregion 1 and 2. Land is shown in black and shallow reefs are sh

Drivers of tidal characteristic changes in north western France: a statistical analysis

Tides  are  changing on  human  timescales, and  an  understanding  of reasons for these changes  is  important  for  inundation  risk…
(a) absolute M2 amplitude change at Brest since 1846; (b) Range of ܶܵܥ∆ ௔௠௣ (where * represents statistically significant (p>0.05) models that also positive R2 values).

Bayesian networks to predict storm impact using data from both monitoring networks and statistical learning methods

Bayesian networks are probabilistic graphical models that are increasingly used to translate hydraulic boundary conditions during storm events into onshore hazards. However, comprehensive…
Scatter plot of water level vs significant wave height showing the storm impact regime observed and synthetized by the statistical learning method

Water Level Modulation of Wave Transformation, Setup and Runup Over La Saline Fringing Reef

Coral reefs represent an efficient natural mechanical coastal defense against ocean waves. The focus of this study is La Saline fringing coral reef, located in the microtidal West of La Réunion…
Wave energy spectrum: Temporal evolution at the reef slope (RS) station (a) and at the reef flat (RF) station (c), Total mean wave spectrum over the 53-day of experiment at RS station (b) and at the RF station (d). The black lines represent the frequency bands boundaries (0.04 Hz for IG/GW bands and 0.004 Hz for VLF/IG bands) Periods P1, P2 and P3, corresponding to the wave events of interest, are highlighted by the purple boxes.

A long-term dataset of topography and nearshore bathymetry at the macrotidal pocket beach of Porsmilin, France

Long-term datasets documenting the evolution of coastal forms and processes, through the provision of recurring beach as well as shoreface morphological observations and accompanying time-series…
Survey site. (a) Map of western France. (b) DEM of northwest Brittany coastline (source: MNT Bathymétrique de façade Atlantique67 (Projet Homonim) - Shom) showing the location of Pierres Noires CANDHIS wave buoy (node 47039) and Le Conquet tidal gauge (green square and triangle, respectively)

A database for sea-level monitoring in French Polynesia

This article presents a curated database of the sea-level measurements acquired by the network of the five geodetic tide gauges managed over French Polynesia by the Geodesy Observatory of Tahiti…
Makemo tide station (RADAR sensor). Top: Residual signal showing nontidal sea-level variations. Bottom: Monthly values of the nontidal variations showing the seasonal variations associated with Sa = 5 cm.

Apport de l'imagerie satellitaire pour l'identification et la cartographie des habitats littoraux de Mayotte soumis à une subsidence rapide

L’île de Mayotte (canal du Mozambique), offre une grande diversité de littoraux influencés par son vaste complexe récifo-lagonaire. Ces habitats (plages, platiers coralliens, herbiers, mangroves…
Localisation de la zone d’étude (a et b), et contexte associé aux mouvements verticaux de Mayotte : c) subsidence observée, données GNSS (Coordination observations géodésiques à Mayotte) et d) variation du niveau marin observé depuis 1963 (données REFMAR).

XYZ n°177 : Niveau de la mer

Dans ce numéro spécial, une collaboration de l'Association des amis du marégraphe de Marseille et de l'AFT, le lecteur pourra, lui-même, se faire une idée, aussi scientifique que précise, du…
XYZ n°177

Sea level changes: the data available at the PSMSL and SONEL and the results of satellite altimetry

Sea level changes are a complex and quite discussed topic in the media, mostly because of their relationship with “climate change”. The first instruments to evaluate sea level changes are the Tide…
The situation of PSMSL data stations

Observational study of the heterogeneous global meteotsunami generated after the Hunga Tonga–Hunga Ha'apai Volcano eruption

The Hunga Tonga–Hunga Ha’apai volcano eruption of January 15th 2022 generated a global atmospheric and oceanic response that was recorded by an unprecedented amount of sensors. The…
Location of the tide gauges used in this work (small blue dots). The red diamonds with letters show the location of the atmospheric pressure time series plotted in Fig. 2. The cyan dots with numbers show the location of the sea level time series plotted in Fig. 4. The colored patches show the different world regions selected to perform the analysis shown in Fig. 5. The map has been drawn with MATLAB33 using the M_Map34 toolbox (https://www.eoas.ubc.ca/~rich/map.html).