Axel Ehrhold
YOU?
Author Swipe
View article: Geomorphological patterns and sedimentary facies in a modern mixed carbonate-siliciclastic lagoon (New Caledonia)
Geomorphological patterns and sedimentary facies in a modern mixed carbonate-siliciclastic lagoon (New Caledonia) Open
International audience
View article: Holocene paleoenvironmental reconstructions in western Brittany (Bay of Brest): Part II – A 7 kyr human-environment story with a focus on the Neolithic-Bronze Age transition
Holocene paleoenvironmental reconstructions in western Brittany (Bay of Brest): Part II – A 7 kyr human-environment story with a focus on the Neolithic-Bronze Age transition Open
The Bay of Brest (BB, NW France) is a semi-enclosed basin of 180 km² subject to macro-tidal dynamics and to the fluvial influences of the rivers Aulne and Elorn, which combined drain watersheds of 2600 km². This coastal environment is subj…
View article: Holocene paleoenvironmental reconstructions in western Brittany Bay of Brest: Part I – Understanding the spatial distribution of palynological records
Holocene paleoenvironmental reconstructions in western Brittany Bay of Brest: Part I – Understanding the spatial distribution of palynological records Open
The Bay of Brest (BB) is a shallow estuarine environment in NW France. This semi-enclosed basin of 180 km² is subject to multiple hydrodynamic factors including the dual influence of oceanic currents and fluvial discharges (Aulne and Elorn…
View article: Dunes morphodynamics superimposed on sand banks in a shallow macro-tidal environment: the example of the Haut Fond de Ouessant
Dunes morphodynamics superimposed on sand banks in a shallow macro-tidal environment: the example of the Haut Fond de Ouessant Open
This study investigates the morphological parameters and migration rates of dune systems associated with a set of banner banks located at intermediate depths (50 m to 120 m) in the context of a highly dispersive shelf, offshore Brittany (W…
View article: Morphological and internal variability of sand banks on a macro tidal dispersive shelf
Morphological and internal variability of sand banks on a macro tidal dispersive shelf Open
We investigated the morphological and architectural variability of four sandbanks, from the same area, at intermediate depths (from 50 to 120m) along the continental shelf of Western Brittany (France) in the Iroise Sea, a dispersive shelf …
View article: Sponge contribution to the silicon cycle of a diatom‐rich shallow bay
Sponge contribution to the silicon cycle of a diatom‐rich shallow bay Open
In coastal systems, planktonic and benthic silicifiers compete for the pool of dissolved silicon, a nutrient required to make their skeletons. The contribution of planktonic diatoms to the silicon cycle in coastal systems is often well cha…
View article: Characterization of gas‐bearing sediments in the coastal environment using geophysical and geotechnical data
Characterization of gas‐bearing sediments in the coastal environment using geophysical and geotechnical data Open
Seismic investigation in marine gas‐bearing sediments often fails to get information below the acoustic mask created by free gas. To circumvent this problem, we combined collocated multichannel ultra‐high resolution seismic imaging, marine…
View article: Sponge contribution to the silicon cycle of a diatom-rich shallow bay
Sponge contribution to the silicon cycle of a diatom-rich shallow bay Open
In coastal systems, planktonic and benthic silicifiers compete for the pool of dissolved silicon, a nutrient required to make their skeletons. The contribution of planktonic diatoms to the cycling of silicon in coastal systems is often wel…
View article: Status of Basement Terranes in Orogens: Insights From the Cadomian Domain of the North Armorican Variscides, Western France
Status of Basement Terranes in Orogens: Insights From the Cadomian Domain of the North Armorican Variscides, Western France Open
The stable versus mobile behavior of basement terranes in orogens is discussed about the North Armorican Cadomian‐floored domain (NAD) in the Armorican Variscides, Western France. Our onshore/offshore structural study demonstrates the hete…
View article: Revival of Ancient Marine Dinoflagellates Using Molecular Biostimulation
Revival of Ancient Marine Dinoflagellates Using Molecular Biostimulation Open
The biological processes involved in the preservation, viability, and revival of long‐term dormant dinoflagellate cysts buried in sediments remain unknown. Based on studies of plant seed physiology, we tested whether the revival of ancient…
View article: The Aquitaine Shelf Edge (Bay of Biscay): A Primary Outlet for Microbial Methane Release
The Aquitaine Shelf Edge (Bay of Biscay): A Primary Outlet for Microbial Methane Release Open
A few thousand (2,612) seeps are releasing microbial methane bubbles from the seafloor at the Aquitaine Shelf edge (Bay of Biscay) at shallow water depths (140–220 m). This methane contributes to the formation of meter‐scale subcircular ca…
View article: Palaeoenvironmental reconstructions during the Meso- to Neolithic transition (9.2–5.3 cal. ka BP) in Northwestern France: Palynological evidences
Palaeoenvironmental reconstructions during the Meso- to Neolithic transition (9.2–5.3 cal. ka BP) in Northwestern France: Palynological evidences Open
Sedimentological, palynological, and micropalaeontological studies carried out throughout the first half of the Holocene, during the Mesolithic/Neolithic transition in the Bay of Brest (i.e. 9200–9000 and 6600–5300 cal. BP) and in the Bay …
View article: The Stone Tidal Fish Weirs of the Molène Archipelago, Iroise Sea, Brittany, Western France: a long‐term tradition with early megalithic origins
The Stone Tidal Fish Weirs of the Molène Archipelago, Iroise Sea, Brittany, Western France: a long‐term tradition with early megalithic origins Open
This reports on a project that combined evidence gleaned from aerial photographs, place-names, interviews, topography, LIDAR data, and sonar bathymetry to locate stone tidal fish weirs in the Molene Archipelago. The results were verified b…
View article: Pockmarks on the South Aquitaine Margin continental slope: The seabed expression of past fluid circulation and former bottom currents
Pockmarks on the South Aquitaine Margin continental slope: The seabed expression of past fluid circulation and former bottom currents Open
Inactive and mostly elongated pockmarks of 100–200 m in dimension were recently discovered on the South Aquitaine Margin continental slope. They are distributed at water depths greater than 350 m in both interfluve and sediment-wave areas,…
View article: Data for: Anthropogenic eutrophication overlapping natural climate variability over the last 150 years: palynological evidence (Bay of Brest, NW France)
Data for: Anthropogenic eutrophication overlapping natural climate variability over the last 150 years: palynological evidence (Bay of Brest, NW France) Open
Appendix 1: Exhaustive table of palynological results (individual counts).
View article: Space-time evolution of a large field of pockmarks in the Bay of Concarneau (NW Brittany)
Space-time evolution of a large field of pockmarks in the Bay of Concarneau (NW Brittany) Open
About a decade ago, a large field of pockmarks, covering an overall area of 36 km 2 was discovered in water depths of < 30 m in the central part of the Bay of Concarneau (Southern Brittany, France). This field, composed of features from 5 …
View article: Transformations of maritime and island landscapes in the western France over the last 8,000 years : a long story of the links between Human and Environment
Transformations of maritime and island landscapes in the western France over the last 8,000 years : a long story of the links between Human and Environment Open
International audience
View article: Modern morpho-sedimentological patterns in a tide-dominated estuary system: the Bay of Brest (west Britanny, France)
Modern morpho-sedimentological patterns in a tide-dominated estuary system: the Bay of Brest (west Britanny, France) Open
Long-studied with respect to its sedimentological features (1897), the Bay of Brest (Western Britanny, France) is a textbook example of a tide-dominated estuary. Characterised by macrotidal conditions, this estuary system is sheltered from…
View article: Environmental factors affecting maerl bed structure in Brittany (France)
Environmental factors affecting maerl bed structure in Brittany (France) Open
This study used a large spatial scale approach in order to better quantify the relationships between maerl bed structure and a selection of potentially forcing physical factors. Data on maerl bed structure and morpho-sedimentary characteri…