A5072653985- Arctic and Antarctic ice dynamics
- Ocean Acidification Effects and Responses
- Methane Hydrates and Related Phenomena
- Marine and coastal ecosystems
- Atmospheric and Environmental Gas Dynamics
- Cryospheric studies and observations
- Marine Biology and Ecology Research
- Oceanographic and Atmospheric Processes
- Marine Bivalve and Aquaculture Studies
- Climate change and permafrost
- Microbial Community Ecology and Physiology
- Geological Studies and Exploration
- Geology and Paleoclimatology Research
- Isotope Analysis in Ecology
- Marine and coastal plant biology
- Polar Research and Ecology
- Atmospheric chemistry and aerosols
- Arctic and Russian Policy Studies
- Aquatic Ecosystems and Biodiversity
- Marine and environmental studies
- Per- and polyfluoroalkyl substances research
- Coastal and Marine Management
- Geological and Geophysical Studies
- Marine and fisheries research
- Indigenous Studies and Ecology
University of Liège
2016-2025
Laboratoire d’Études en Géophysique et Océanographie Spatiales
2014-2017
Environnements et Paléoenvironnements Océaniques et Continentaux
2008-2012
Laboratoire des Sciences de l'Environnement Marin
2012
Centre National de la Recherche Scientifique
2004-2012
Institut Universitaire Européen de la Mer
2012
Université de Bordeaux
2008-2011
Institut Océanographique
2004-2008
Institut de Physique
2004
Observatoire Océanologique de Banyuls-sur-Mer
2004
Air‐water CO 2 fluxes were up‐scaled to take into account the latitudinal and ecosystem diversity of coastal ocean, based on an exhaustive literature survey. Marginal seas at high temperate latitudes act as sinks from atmosphere, in contrast subtropical tropical marginal that sources atmosphere. Overall, a strong sink about −0.45 Pg C yr −1 . This could be almost fully compensated by emission ensemble near‐shore ecosystems 0.40 Although this value is subject large uncertainty, it stresses...
The partial pressure of carbon dioxide (pCO 2 ) in surface waters and related atmospheric exchanges were measured nine European estuaries. Averaged fluxes over the entire estuaries are usually range 0.1 to 0.5 mole CO per square meter day. For wide estuaries, net daily atmosphere amount several hundred tons (up 790 day Scheldt estuary). emit between 30 60 million year atmosphere, representing 5 10% present anthropogenic emissions for Western Europe.
We studied the direct effects of CO2 and related changes in seawater carbonate chemistry on marine planktonic organisms a mesocosm experiment. In nine outdoor enclosures (~11 m3 each), partial pressure (pCO2) was modified by an aeration system. The triplicate treatments represented low (~190 parts per million volume (ppmV) CO2), present (~410 ppmV high (~710 CO2) pCO2 conditions. After initial fertilization with nitrate phosphate bloom dominated coccolithophorid Emiliania huxleyi occurred...
We measured the flux of CO 2 across air‐water interface using floating chamber method in three European estuaries with contrasting physical characteristics (Randers Fjord, Scheldt, and Thames). computed gas transfer velocity CO2 ( k ) from concomitant measurements gradient partial pressure (pCO ). There was a significant linear relationship between wind speed for each estuaries. The differences y‐intercept slope sites are related to contribution tidal currents water turbulence at fetch...
Primary production and calcification in response to different partial pressures of CO 2 ( P ) (“glacial,” “present,” “year 2100” atmospheric concentrations) were investigated during a mesocosm bloom dominated by the coccolithophorid Emiliania huxleyi . The day‐to‐day dynamics net community (NCP) (NCC) assessed development decline monitoring dissolved inorganic carbon (DIC) total alkalinity (TA), together with oxygen 14 C incorporation. When comparing year 2100 glacial conditions we observed:...
The partial pressure of CO 2 (pCO ) was measured at daily and weekly time scales in the waters surrounding mangrove forests Papua New Guinea, Bahamas India. pCO values range from 380 to 4800 μatm. These data, together with previously published suggest that overall oversaturation respect atmospheric equilibrium surface is a general feature forests, though entire ecosystems (sediment, water vegetation) are probably sinks for . computed fluxes converge about +50 mmolC m −2 day −1 If this...
AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 34:93-104 (2004) - doi:10.3354/ame034093 Transparent exopolymer particles and dissolved organic carbon production by Emiliania huxleyi exposed different CO2 concentrations: a mesocosm experiment Anja Engel1,*, Bruno Delille2, Stéphan Jacquet3, Ulf Riebesell1, Emma Rochelle-Newall4, Terbrüggen1, Ingrid Zondervan1 1Alfred...
Although salt rejection from sea ice is a key process in deep-water formation ice-covered seas, the concurrent of CO2 and subsequent effect on air–sea exchange have received little attention. We review mechanisms by which directly indirectly controls use recent measurements inorganic carbon compounds bulk to estimate that oceanic uptake during seasonal cycle sea-ice growth decay regions equals almost half net atmospheric ice-free polar seas. This driven has not been considered so far...
Methane is the second most important greenhouse gas contributing to climate warming. The open ocean a minor source of methane atmosphere. We report intense emissions from near-shore southern region North Sea characterized by presence extensive areas with gassy sediments. average flux intensities (~130 μmol m(-2) d(-1)) are one order magnitude higher than values characteristic continental shelves (~30 and three orders (~0.4 d(-1)). high concentrations (up 1,128 nmol L(-1)) that sustain these...
We studied the temporal variations of CO 2 , O and dimethylsulfide (DMS) concentrations within three environments (sea‐ice brine, platelet ice‐like layer, underlying water) in coastal area Adeélie Land, Antarctica, during spring 1999 before ice breakup. Temporal changes were different among environments, while similar trends observed each environment at all stations. The water was always undersaturated (around 85%) oversaturated deepest increased sea‐ice brine as it melted, reaching...
Abstract. In spite of the recent strong increase in number measurements partial pressure CO2 surface ocean (pCO2), air–sea balance continental shelf seas remains poorly quantified. This is a consequence these regions remaining strongly under-sampled both time and space pCO2 exhibiting much higher temporal spatial variability compared to open ocean. Here, we use modified version two-step artificial neural network method (SOM-FFN; Landschützer et al., 2013) interpolate data along margins with...
We present an Arctic seasonal survey of carbon dioxide partial pressure (pCO 2 ) dynamics within sea ice brine and related air‐ice CO fluxes. The was carried out from early spring to the beginning summer in coastal waters Amundsen Gulf. High concentrations pCO (up 1834 μ atm) were observed April as a consequence concentration solutes brines, CaCO 3 precipitation microbial respiration. detected through anomalies total alkalinity (TA) dissolved inorganic (DIC). This seems have occurred highly...
Abstract We report first direct measurements of the partial pressure CO 2 (pCO ) within Antarctic pack sea ice brines and related fluxes across air‐ice interface. From late winter to summer, encased in change from a large oversaturation, relative atmosphere, marked undersaturation while underlying oceanic waters remains slightly oversaturated. The decrease summer pCO is driven by dilution with melting ice, dissolution carbonate crystals, net primary production. As warms, its permeability...
The rapid melt of snow and sea ice during the Arctic summer provides a significant source low-salinity meltwater to surface ocean on local scale. accumulation this on, under, around floes can result in relatively thin layers upper ocean. Due small-scale nature these upper-ocean features, typically order 1 m thick or less, they are rarely detected by standard methods, but nevertheless pervasive critically important summer. Observations Multidisciplinary drifting Observatory for Study Climate...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 259:129-138 (2003) - doi:10.3354/meps259129 Carbonate dissolution in turbid and eutrophic Loire estuary Gwenaël Abril1,*, Henri Etcheber1, Bruno Delille2, Michel Frankignoulle2 Alberto V. Borges2 1Département de Géologie et Océanographie, Université Bordeaux 1, CNRS-UMR EPOC 5805, avenue des Facultés, 33405...