Xavier Durrieu de Madron

Xavier Durrieu de Madron
French National Centre for Scientific Research | CNRS · Centre d'Etude et de Formation sur les Environnements Méditerranéens (CEFREM)

Ph.D , HDR

About

219
Publications
46,314
Reads
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Introduction
Current research focuses on dense water formation processes and effects on sediment transport in coastal and deep marine environments, with an emphasis on Mediterranean ecosystems. He also works on suspended particles dynamics, especially on the size spectra, aggregation, and settling.
Additional affiliations
October 1994 - present
Université de Perpignan
Position
  • Managing Director
October 1994 - October 2020
French National Centre for Scientific Research
Position
  • Managing Director
January 1993 - November 2018
French National Centre for Scientific Research
Position
  • Managing Director

Publications

Publications (219)
Presentation
The Beagle Channel (BC) is a sub-Antarctic coastal marine environment (~54.5ºS) that connects the Pacific and Atlantic oceans and is influenced by runoff, wind and seasonal mixing. Along its 300 km length, the BC has hydrological sub-basins (SC) separated from each other by bathymetric barriers. The object of this study focuses on the internal SC (...
Presentation
The Beagle Channel (BC) is an inter-oceanic passage shared by Argentina and Chile that connects the Pacific Ocean and the Atlantic Ocean and has contrasting hydrological sub-basins along its 300 km length. This system is influenced by the inflow of sub-Antarctic waters that mix with continental contributions from glaciers and fluvial discharges, ha...
Article
Full-text available
Climatic changes and interannual variability in the Mediterranean overturning circulation are crucially linked to dense water formation in the Levantine Sea, namely the Levantine Intermediate Water whose formation zone, comprising multiple and intermittent sources, extends over fluctuating pathways. To probe into the variability of this water forma...
Preprint
Full-text available
Marine particles of different nature are found throughout the global Ocean. The term "marine particles" describes detritus aggregates, fecal pellets, but also bacterio-, phyto-, zooplankton and nekton. Here we present a global particle size distribution dataset obtained with several Underwater Vision Profiler 5 (UVP5) camera systems. Overall, withi...
Article
Describing and quantifying storm-induced sediment dynamics enables improved mapping of the fate of sediments over continental shelves, which is necessary to understand their role in the structure and dynamics of marine ecosystems, nutrient cycling, and dispersion of pollutants. Storms are episodic processes that can lead to massive sediment resuspe...
Article
Full-text available
The Beagle Channel (BC) is a long and narrow interoceanic passage (∼270 km long and 1–12 km wide) with west-east orientation and complex bathymetry connecting the Pacific and Atlantic oceans at latitude 55°S. This study is the first integrated assessment of the main oceanographic features of the BC, using recent oceanographic observations from crui...
Article
Fluorescence sensors mounted on unmanned underwater gliders open new ways of investigation to detect dissolved hydrocarbons in seawater. A glider was deployed for 20 days to monitor biogeochemical and physical signals associated with natural hydrocarbon seepages within the first 700 m in the Angolan waters. The glider was equipped with fluorometers...
Article
Full-text available
The seasonal variability of the carbonate system in the eastern Mediterranean Sea (EMed) was investigated based on discrete total alkalinity (A T ), total dissolved inorganic carbon (C T ), and pH measurements collected during three cruises around Crete between June 2018 and March 2019. This study presents a detailed description of this new carbona...
Article
Full-text available
The seasonal variability of the carbonate system in the eastern Mediterranean Sea (EMed) was investigated based on discrete total alkalinity (A T), total dissolved inorganic carbon (C T), and pH measurements collected during three cruises around Crete between June 2018 and March 2019. This study presents a detailed description of this new carbonate...
Article
Full-text available
The Mediterranean Sea is a hotspot for climate change, and recent studies have reported its intense warming and salinification. In this study, we use an outstanding dataset relying mostly on glider endurance lines but also on other platforms to track these trends in the northwestern Mediterranean where deep convection occurs. Thanks to a high spati...
Article
Full-text available
Dense shelf water cascading and open-ocean convection frequently occur in the Gulf of Lions, Northwestern Mediterranean Sea. These intense dense water formation events are capable of supplying large amounts of particulate matter as well as remobilizing and dispersing local sediments and are therefore thought to leave an imprint on superficial depos...
Article
Full-text available
The recent integration of Acoustic Doppler Current Profilers (ADCPs) onto underwater gliders changes the way current and sediment dynamics in the coastal zone can be monitored. Their endurance and ability to measure in all weather conditions increases the probability of capturing sporadic meteorological events, such as storms and floods, which are...
Conference Paper
Full-text available
Abstract The societal benefits of satellite ocean colour include aiding the management of the marine ecosystem, helping understand the role of the ocean ecosystem in climate change, aquaculture, fisheries, coastal zone water quality, and the mapping and monitoring of harmful algal blooms. Ocean colour is also designated as an essential climate vari...
Article
A coupled ocean-wave model was used to investigate residence times of the water masses on the Gulf of Lion shelf and their export routes during autumn 2010 and winter 2010–2011. Particular attention is paid to the Cap de Creus region and submarine canyon, a key site for the export of water from the Gulf of Lion shelf. First, model results were comp...
Article
Lophelia pertusa and Madrepora oculata, two cosmopolitan coral species of the deep ocean, build reef-like structures that provide ecological niches and nurseries for many species. These cold-water corals (CWCs) are thought to grow slowly making associated communities vulnerable to disturbance. However, in situ growth dynamics remains poorly known....
Article
Full-text available
This study examines the distribution and seasonal evolution of hydrographic, hydrodynamic, and nepheloid layers in Ushuaia Bay and the submerged glacial valley that connects it to the Beagle Channel. The hydrographic structure is highly seasonal, with a total mixing of the water column in winter and the appearance of a pycnocline between 50 and 70...
Article
Full-text available
This study examines the distribution and seasonal evolution of hydrographic, hydrodynamic, and nepheloid layers in Ushuaia Bay and the submerged glacial valley that connects it to the Beagle Channel. The hydrographic structure is highly seasonal, with a total mixing of the water column in winter and the appearance of a pycnocline between 50 and 70...
Article
The Demerara Plateau, off the French Guiana and Surinam margin, corresponds to a prominent sub-horizontal marginal plateau. The interpretation of a large set of seismic data acquired along the Demerara Plateau and integration with previous seismic stratigraphy and drill studies enables a better understanding of the sedimentary evolution of the oute...
Presentation
Full-text available
The Beagle Channel is a subantarctic passage connecting the Pacific and Atlantic oceans, and where mixing processes between oceanic and continental waters and strong land-to-sea exchanges of water and particulate matter are taking place. A collection of hydrographic, hydrodynamic and nephelometric observations is presented in this work to advance...
Conference Paper
Full-text available
The Beagle Channel and in particular Ushuaia Bay, are subantarctic environments where mixing processes between oceanic and continental waters, and strong land-to-sea exchanges of water and particulate matter are taking place. Multiple sources of particulate matter to the channel can be identified: glaciers, rivers, direct runoff from forests along...
Article
Full-text available
A new special issue of JGR: Oceans and JGR: Atmospheres presents new insights into the dynamics of dense water formation in the western Mediterranean Sea and its biogeochemical consequences.
Conference Paper
Full-text available
El Canal Beagle (CB) es un ambiente marino costero austral complejo, que conecta los océanos Pacífico y Atlántico, y que recibe en su recorrido importantes aportes terrígenos por parte de las cadenas montañosas de los Andes Fueguinos y otros aportes de materia orgánica de origen antrópico por parte de la ciudad de Ushuaia. Entre los días 27 a 31 de...
Article
Full-text available
The northwestern Mediterranean Sea is one of the few sites of open-sea deep convection and dense water formation. The area is characterized by intense air-sea exchanges favored by the succession of strong northerly and northwesterly winds during autumn and winter that eventually induce deep convection episodes and the formation of the Western Medit...
Article
Full-text available
Observing, modelling and understanding the climate-scale variability of the deep water formation (DWF) in the North-Western Mediterranean Sea remains today very challenging. In this study, we first characterize the interannual variability of this phenomenon by a thorough reanalysis of observations in order to establish reference time series. These...
Poster
Full-text available
El Canal Beagle (CB) es un ambiente marino costero austral complejo, que conecta los océanos Pacífico y Atlántico, y que recibe en su recorrido importantes aportes terrígenos por parte de las cadenas montañosas de los Andes Fueguinos y otros aportes de materia orgánica de origen antrópico por parte de la ciudad de Ushuaia. Entre los días 27 a 31 de...
Article
Full-text available
Numerous recurrent seep sites were identified in the deep-water environment of the Lower Congo Basin from the analysis of an extensive dataset of satellite-based synthetic-aperture radar images. The integration of current data was used to link natural oil slicks with active seep-related seafloor features. Acoustic Doppler current profiler measureme...
Article
Full-text available
Diatoms are one of the major primary producers in the ocean, responsible annually for ~20% of photosynthetically fixed CO2 on Earth. In oceanic models, they are typically represented as large (>20 µm) microphytoplankton. However, many diatoms belong to the nanophytoplankton (2–20 µm) and a few species even overlap with the picoplanktonic size-class...
Article
Full-text available
During winter 2012-2013, open-ocean deep convection which is a major driver for the thermohaline circulation and ventilation of the ocean, occurred in the Gulf of Lions (Northwestern Mediterranean Sea) and has been thoroughly documented thanks in particular to the deployment of several gliders, Argo profiling floats, several dedicated ship cruises,...
Article
Ocean margins are focal regions in terms of mercury (Hg) exchanges between the continent and the open sea. The aim of this paper is to describe the distribution and partition of Hg between the gaseous, dissolved and particulate phases in the waters of the Northwestern Mediterranean (NWM) margin, in order to assess the Hg sources and exchanges withi...
Article
Full-text available
This study was a part of the DeWEX project (Deep Water formation EXperiment), designed to better understand the impact of dense water formation on the marine biogeochemical cycles. Here, nutrient and phytoplankton vertical and horizontal distributions were investigated during a deep open-ocean convection event and during the following spring bloom...
Article
An experiment was carried out in the Gulf of Lions (NW Mediterranean) in February 2014 to assess the temporal and spatial variability of the distribution and size of suspended particulate matter (SPM) in the Rhône Region of Freshwater Influence (ROFI). A set of observations from an autonomous underwater glider, satellite ocean color data, and meteo...
Article
The Gulf of Lions in the northwestern Mediterranean is one of the few sites around the world ocean exhibiting deep open-ocean convection. Based on 6-year long (2009-2015) time series from a mooring in the convection region, shipborne measurements from repeated cruises, from 2012 to 2015, and glider measurements, we report evidence of bottom thick n...
Article
Despite the ecologic and economical importance of coastal areas, the neurotoxic bioaccumulable monomethylmercury (MMHg) fluxes within the ocean margins and exchanges with the open sea remain unassessed. The aim of this paper is to address the questions of the abundance, distribution, production and exchanges of methylated mercury species (MeHgT), i...
Article
Full-text available
The HYdrological cycle in the Mediterranean Experiment (HyMeX) Special Observing Period 2 (SOP2, January 27–March 15, 2013) was dedicated to the study of dense water formation in the Gulf of Lion in the northwestern Mediterranean. This paper outlines the deep convection of winter 2012–2013 and the meteorological conditions that produced it. Alterna...
Article
Full-text available
We present here a unique oceanographic and meteorological dataset focus on the deep convection processes. Our results are essentially based on in situ data (mooring, research vessel, glider, and profiling float) collected from a multi-platform and integrated monitoring system (MOOSE: Mediterranean Ocean Observing System on Environment), which monit...
Data
The Lion mooring is located in the center of the Gulf of Lion where one of the largest open sea convection happens in the winter period. This open sea convection is an active vertical mixing that concerns the whole northern Mediterranean and can reach great deep in the Gulf of Lion (where it may even reach the bottom ~ 2500m) due to the Mistral and...
Data
These monthly gridded climatologies were produced using MBT, XBT, Profiling floats, Gliders, and ship-based CTD data from several databases and carried out in the Med. between 1969 and 2013. The Mixed Layer Depth (MLD) is calculated with a delta T= 0.1 C criterion relative to 10m reference level on individual profiles. The Depth of the Bottom of t...
Article
Full-text available
Since 2010, an intense effort in the collection oftextitin situ observations has been carried out in the northwestern Mediterranean Sea thanks to gliders, profiling floats, regular cruises and mooring lines. This integrated observing system enabled a year-to-year monitoring of the deep waters formation that occurred in the Gulf of Lions area during...
Conference Paper
Full-text available
The ocean response to atmospheric forcing is critical to many oceanographic processes. Data on air temperature, heat and buoyancy losses, and water temperature from winter 2005 allowed detecting the formation of dense water in the NW Mediterranean Sea, both on the continental shelf and offshore, which led to cascading and open sea convection, respe...
Poster
Full-text available
The present work aims at understanding the synchronous response of oceanographic processes in the Cantabrian Sea (southern Bay of Biscay) and the Gulf of Lion (NW Mediterranean Sea) as a consequence of atmospheric forcing.
Article
Full-text available
The evolution of the stratification of the north-western Mediterranean between summer 2012 and the end of winter 2013 was simulated and compared with different sets of observations. A summer cruise and profiler observations were used to improve the initial conditions of the simulation. This improvement was crucial to simulate winter convection. Var...
Article
Full-text available
Open-ocean convection is a fundamental process for thermohaline circulation and biogeochemical cycles that causes spectacular mixing of the water column. Here, we tested how much the depth-stratified prokaryotic communities were influenced by such an event, and also by the following re-stratification. The deep convection event (0-1500m) that occurr...
Article
The Demerara Plateau, belonging to the passive transform margin of French Guiana, was investigated during the IGUANES cruise in 2013. The objectives of the cruise were to explore the poorly-known surficial sedimentary column overlying thick mass transport deposits as well as to understand the factors controlling recent sedimentation. The presence o...
Article
Full-text available
The IGUANES cruise took place in May 2013 on the R/V L’Atalante along the Demerara passive transform margin off French Guiana and Surinam. Seismic, multibeam and chirp acquisitions were made. Piston cores were collected for pore geochemistry and sedimentology. A mooring was deployed on the sea-bottom for 10 months (temperature, salinity, turbidity...
Research
Full-text available
This EU-funded research project brings together new scientific knowledge on how ecosystems work in the Mediterranean and the Black Sea. New decision-support tools and recommendations for policy makers are also part of the project's contribution to the development of sustainable marine environment management policies.
Poster
Full-text available
Le Plateau de Demerara a été le sujet d’une campagne océanographique (IGUANES) en Mai 2013. L’un des objectifs de cette mission et l’objectif de ce travail est de comprendre les différents processus sédimentaire qui affectent cette zone particulière et leurs possibles interactions entre eux. Pour cela, de nombreuses données géophysiques (bathymétri...
Article
Full-text available
The carbon cycle of the Arctic Ocean is tightly regulated by land-atmosphere-cryosphere-ocean interactions. Characterizing these environmental exchanges and feedbacks is critical to facilitate projections of the carbon cycle under changing climate conditions. The environmental drivers of sinking particles including organic carbon (OC) to the deep-s...
Article
Full-text available
PERSEUS project aims to identify the most relevant pressures exerted on the ecosystems of the Southern European Seas (SES), highlighting knowledge and data gaps that endanger the achievement of SES Good Environmental Status (GES) as mandated by the Marine Strategy Framework Directive (MSFD). A complementary approach has been adopted, by a meta-anal...