@article {9024,
	title = {Interannual variability of the initiation of the phytoplankton growing period in two French coastal ecosystems},
	journal = {Biogeosciences},
	volume = {19},
	year = {2022},
	pages = {5667{\textendash}5687},
	abstract = {Decadal time series of chlorophyll\&nbsp;a\&nbsp;concentrations sampled at high and low frequencies are explored to study climate-induced impacts on the processes inducing interannual variations in the initiation of the phytoplankton growing period (IPGP) in early spring. We specifically detail the IPGP in two contrasting coastal temperate ecosystems under the influence of rivers highly rich in nutrients: the Bay of Brest and the Bay of Vilaine. In both coastal ecosystems, we observed a large interannual variation in the IPGP influenced by sea temperature, river inputs, light availability (modulated by solar radiation and water turbidity), and turbulent mixing generated by tidal currents, wind stress, and river runoff. We show that the IPGP is delayed by around 30 d in 2019 in comparison with 2010. In situ observations and a one-dimensional vertical model coupling hydrodynamics, biogeochemistry, and sediment dynamics show that the IPGP generally does not depend on one specific environmental factor but on the interaction between several environmental factors. In these two bays, we demonstrate that the IPGP is mainly caused by sea surface temperature and available light conditions, mostly controlled by the turbidity of the system before first blooms. While both bays are hydrodynamically contrasted, the processes that modulate the IPGP are similar. In both bays, the IPGP can be delayed by cold spells and flood events at the end of winter, provided that these extreme events last several days.},
	doi = {10.5194/bg-19-5667-2022},
	url = {https://bg.copernicus.org/articles/19/5667/2022/},
	author = {Poppeschi, Coline and Charria, Guillaume and Daniel, Anne and Verney, Romaric and Rimmelin-Maury, Peggy and Retho, Micha{\"e}l and Goberville, Eric and Emilie Grossteffan and Plus, Martin}
}
@article {7580,
	title = {Bi-decadal variability in physico-biogeochemical characteristics of temperate coastal ecosystems: from large-scale to local drivers},
	journal = {Marine Ecology Progress Series},
	volume = {660},
	year = {2021},
	month = {Feb-18-2021},
	pages = {19-35},
	abstract = {Coastal marine ecosystems, which play a crucial role in the biogeochemical and ecological functioning of the earth system, are highly sensitive to the combined effects of climate and human activities. Because of their location, coastal ecosystems are directly influenced by human activities. Thus, it remains challenging to assess the spatial and temporal scales at which climate influences coastal ecosystems. Twelve sampling stations distributed in eight ecosystems of Western Europe were monitored during two decades for physico-biogeochemical parameters (temperature, salinity, concentrations of dissolved oxygen, nutrients and particulate material). The study encompasses a large diversity of temperate coastal ecosystems regarding geomorphology, trophic status, tidal regime, river influence, turbidity, and so on. Time-series analysis coupled with standardised 3-mode Principal Component Analyses, Partial Triadic Analyses and correlations were used to assess bi-decadal variability and ecosystems trajectories, and to detect the large-scale, regional and local drivers. Overall results highlight two abrupt changes in 2001 and 2005. The\&nbsp;bi-decadal changes are related to changes in large-scale and regional climate; detected through proxies of temperature and atmospheric\&nbsp;circulation, as well as through river\&nbsp;discharge. Ecosystem trajectories usually move towards an increase in temperature, salinity and/or a decrease in chlorophyll-a, nutrients and particulate matter. However, the magnitude of change, the year-to-year variability and the sensitivity to the 2001 and 2005 changes vary among the ecosystems. This study highlights the need to perform long-term time series and combining data sets as well as multi-ecosystem and local studies to better understand long-term variability of coastal ecosystems and its associated drivers.},
	issn = {0171-8630},
	doi = {10.3354/meps13577},
	url = {https://doi.org/10.3354/meps13577},
	author = {Lheureux, Arnaud and Savoye, Nicolas and Del Amo, Yolanda and Goberville, Eric and Bozec, Yann and Elsa Breton and Conan, Pascal and L{\textquoteright}Helguen, St{\'e}phane and Mousseau, Laure and Raimbault, Patrick and Rimelin-Maury, Peggy and Seuront, Laurent and Vuillemin, Renaud and Caparros, Jocelyne and Cariou, Thierry and Cordier, MA and Corre, Anne-Marie and Costes, Laurence and Crispi, O. and Muriel Crouvoisier and de Latour, HdL and Derriennic, Herv{\'e} and Devesa, J{\'e}r{\'e}my and Durozier, Ma{\"\i}a and Ferreira, Sophie and Garcia, Nicole and Emilie Grossteffan and Gueux, Aurore and Lafont, M and Lagadec, V{\'e}ronique and Lecuyer, Eric and Leroux, C{\'e}dric and Mac{\'e}, Eric and Maria, E and Mornet, L and Antoine Nowaczyk and Parra, M and Petit, Fabienne and David, V}
}
@article {8060,
	title = {Unraveling salinity extreme events in coastal environments: a winter focus on the Bay of Brest},
	journal = {Frontiers in Marine Science},
	volume = {8},
	year = {2021},
	pages = {966},
	abstract = {Extreme weather events affect coastal marine ecosystems. The increase in intensity and occurrence of such events drive modifications in coastal hydrology and hydrodynamics. Here, focusing on the winter period (from December to March), we investigated long-term (2000-2018) changes in the hydrological properties of the Bay of Brest (French Atlantic coast) as an example of the response of a semi-enclosed bay to extreme weather episodes and large-scale atmospheric circulation patterns. The relationships between extreme weather events and severe low salinity conditions (as a proxy for changes in water density) were investigated using high-frequency in situ observations and high-resolution numerical simulations. The identification of intense episodes was based on the timing, duration and annual occurrence of extreme events. By examining the interannual variability of extreme low salinity events, we detect a patent influence of local and regional weather conditions on atmospheric and oceanic circulation patterns, precipitation and river runoff. We revealed that low salinity events in Brittany were controlled by large-scale forcings: they prevailed during the positive phase of the North Atlantic Oscillation and periods of low occurrences of the Atlantic Ridge weather regime. The increase in severe storms observed in western France since 2010 has led to a doubling of the occurrence and duration of extreme low salinity events in Brittany.},
	url = {https://doi.org/10.3389/fmars.2021.705403},
	author = {Poppeschi, Coline and Charria, Guillaume and Goberville, Eric and Rimmelin-Maury, Peggy and Barrier, Nicolas and Petton, S{\'e}bastien and Unterberger, Maximilian and Emilie Grossteffan and R{\'e}p{\'e}caud, Michel and Qu{\'e}m{\'e}ner, Loic and Theetten, S{\'e}bastien and Le roux, Jean-Fran{\c c}ois and Paul Tr{\'e}guer}
}
@inbook {6847,
	title = {Temperature and salinity changes in coastal waters of Western Europe: variability, trends and extreme events},
	booktitle = {Evolution of Marine Coastal Ecosystems under the Pressure of Global Changes},
	year = {2020},
	publisher = {Springer Nature },
	organization = {Springer Nature },
	edition = {H.-J. Ceccaldi et al.},
	chapter = {15},
	address = {Switzerland},
	abstract = {Coastal marine ecosystems worldwide are not only highly affected by the effects of human activities, but also by the influence of natural climate variability and global climate change. However, it is still a challenge to assess the spatial and temporal scales at which forcings operate and their persistence over time, to determine the vulnerability of coastal ecosystems to climate changes and climate extreme events, and therefore to anticipate the ecological and biological responses of these areas. By investigating these knowledge gaps, our recent studies have shown that the combination of large- and local-scale hydroclimatic influences have induced obvious changes in the physical and chemical characteristics of coastal waters in Western Europe. Because of the complex and non-linear climate-coastal ecosystem relationships, a thorough understanding of the underlying processes is still needed, while extending the spatial and temporal scales of inference. Here, using both high- and low-frequency observations collected from 1998 onwards at the outlet of the Bay of Brest and off Roscoff, we described and documented monthly changes in (1) sea surface temperature, (2) sea surface salinity, (3) river discharges and (4) precipitation patterns. By focusing on the winter period (from December to February), our study revealed that coastal waters of Western Europe are not only significantly connected to large-scale atmospheric conditions and patterns, but also to local-scale drivers such as river discharges. Current strong impacts of regional climate extreme events worldwide led us to devote more attention on understanding the possible impacts of such episodes on the long-term variability and trends of these ecosystems in coastal waters of Western Europe. The signature of extreme events in the Bay of Brest is described and the numerical simulations allowed us to highlight the link between local rivers and changes in salinity.},
	keywords = {Climate variability, Coastal ecosystems, Extreme events, High- and low-frequency in situ sampling, Large and local forcings},
	doi = {10.1007/978-3-030-43484-7_15},
	url = {https://link.springer.com/chapter/10.1007\%2F978-3-030-43484-7_15},
	author = {Charria, Guillaume and Rimmelin-Maury, Peggy and Goberville, Eric and St{\'e}phane L{\textquoteright}Helguen and Barrier, Nicolas and David-Beausire, Christine and Cariou, Thierry and Emilie Grossteffan and R{\'e}p{\'e}caud, Michel and Qu{\'e}m{\'e}ner, Loic and Theetten, S{\'e}bastien and Paul Tr{\'e}guer}
}
@article {6744,
	title = {Dynamics of particulate organic matter composition in coastal systems: Forcing of spatio-temporal variability at multi-systems scale},
	journal = {Progress in Oceanography},
	volume = {162},
	year = {2018},
	month = {Jan-03-2018},
	pages = {271 - 289},
	issn = {00796611},
	doi = {10.1016/j.pocean.2018.02.026},
	url = {https://www.sciencedirect.com/science/article/abs/pii/S0079661117302100},
	author = {Li{\'e}nart, Camilla and Savoye, Nicolas and David, Val{\'e}rie and Ramond, Pierre and Rodriguez Tress, Paco and Hanquiez, Vincent and Marieu, Vincent and Aubert, Fabien and Aubin, S{\'e}bastien and Bichon, Sabrina and Boinet, Christophe and Bourasseau, Line and Bozec, Yann and Br{\'e}ret, Martine and Elsa Breton and Caparros, Jocelyne and Cariou, Thierry and Claquin, Pascal and Conan, Pascal and Corre, Anne-Marie and Costes, Laurence and Muriel Crouvoisier and Del Amo, Yolanda and Derriennic, Herv{\'e} and Dindinaud, Fran{\c c}ois and Duran, Robert and Durozier, Ma{\"\i}a and Devesa, J{\'e}r{\'e}my and Ferreira, Sophie and Eric Feunteun and Garcia, Nicole and Geslin, Sandrine and Emilie Grossteffan and Gueux, Aurore and Guillaudeau, Julien and Guillou, Ga{\"e}l and Jolly, Orianne and Lachauss{\'e}e, Nicolas and Lafont, Michel and Lagadec, V{\'e}ronique and Lamoureux, J{\'e}zabel and Lauga, B{\'e}atrice and Lebreton, Beno{\^\i}t and Lecuyer, Eric and Lehodey, Jean-Paul and Leroux, C{\'e}dric and St{\'e}phane L{\textquoteright}Helguen and Mac{\'e}, Eric and Maria, Eric and Mousseau, Laure and Antoine Nowaczyk and Pineau, Philippe and Petit, Franck and Pujo-Pay, Mireille and Raimbault, Patrick and Rimmelin-Maury, Peggy and Rouaud, Vanessa and Sauriau, Pierre-Guy and Sultan, Emmanuelle and Susperregui, Nicolas}
}
@article {6667,
	title = {Dynamics of particulate organic matter composition in coastal systems: A spatio-temporal study at multi-systems scale},
	journal = {Progress in Oceanography},
	volume = {156},
	year = {2017},
	pages = {221-239},
	abstract = {In coastal systems, the multiplicity of sources fueling the pool of particulate organic matter (POM) leads to divergent estimations of POM composition. Eleven systems (two littoral systems, eight embayments and semi-enclosed systems and one estuary) distributed along the three maritime fa{\c c}ades of France were studied for two to eight years in order to quantify the relative contribution of organic matter sources to the surface-water POM pool in coastal systems. This study was based on carbon and nitrogen elemental and isotopic ratios, used for running mixing models. The POM of the estuary is dominated by terrestrial material (93\% on average), whereas the POM of the other systems is dominated by phytoplankton (84\% on average). Nevertheless, for the latter systems, the POM composition varies in space, with (1) systems where POM is highly composed of phytoplankton (>=93\%), (2) systems characterized by a non-negligible contribution of benthic (8{\textendash}19\%) and/or river (7{\textendash}19\%) POM sources, and (3) the Mediterranean systems characterized by the contribution of diazotroph organisms (ca. 14\%). A continent-to-ocean gradient of river and/or benthic POM contribution is observed. Finally, time series reveal (1) seasonal variations of POM composition, (2) differences in seasonality between systems, and (3) an inshore-offshore gradient of seasonality within each system that were sampled at several stations. Spatial and seasonal patterns of POM composition are mainly due to local to regional processes such as hydrodynamics and sedimentary hydrodynamic (e.g. resuspension processes, changes in river flows, wind patterns influencing along-shore currents) but also due to the geomorphology of the systems (depth of the water column, distance to the shore). Future studies investigating the link between these forcings and POM composition would help to better understand the dynamics of POM composition in coastal systems. {\textcopyright} 2017 Elsevier Ltd},
	keywords = {bacterium, benthos, biogeochemistry, Biological materials, C and n stable isotopes, C:N ratio, Carbon, carbon isotope, Coastal systems, coastal zone, Fluid dynamics, France, geomorphology, Hydrodynamics, Isotopes, isotopic ratio, Mediterranean sea, Meta analysis, meta-analysis, Mixing, Mixing models, nitrogen isotope, Organic compounds, particulate organic matter, Particulate organic matters, Phytoplankton, prokaryote, Rivers, seasonality, spatiotemporal analysis, stable isotope, Surface water, Surface waters, terrestrial deposit, Time series},
	issn = {00796611},
	doi = {10.1016/j.pocean.2017.03.001},
	url = {https://www.sciencedirect.com/science/article/abs/pii/S0079661116301914},
	author = {Li{\'e}nart, Camilla and Savoye, Nicolas and Bozec, Yann and Elsa Breton and Conan, Pascal and David, Val{\'e}rie and Eric Feunteun and Karine Granger{\'e} and Kerherv{\'e}, P. and Lebreton, B. and S{\'e}bastien Lefebvre and St{\'e}phane L{\textquoteright}Helguen and Mousseau, Laure and Raimbault, P and Richard, P. and Riera, P. and Sauriau, P.-G. and Gauthier Schaal and Aubert, F. and Aubin, S. and Bichon, S. and Boinet, C. and Bourasseau, L. and Br{\'e}ret, M. and Caparros, J. and Cariou, T. and Charlier, K. and Claquin, P. and Vincent Cornille and Corre, A.-M. and Costes, L. and Crispi, O. and Muriel Crouvoisier and Czamanski, M. and Del Amo, Y. and Derriennic, H. and Dindinaud, F. and Durozier, M. and Hanquiez, V. and Antoine Nowaczyk and Devesa, J. and Ferreira, S. and Fornier, M. and Garcia, F. and Garcia, N. and Geslin, S. and Emilie Grossteffan and Gueux, A. and Guillaudeau, J. and Guillou, G. and Joly, O. and Lachauss{\'e}e, N. and Lafont, M. and Lamoureux, J. and Lecuyer, E. and Lehodey, J.-P. and Lemeille, D. and Leroux, C. and Mac{\'e}, E. and Maria, E. and Pineau, P. and Petit, F. and Pujo-Pay, M. and Rimelin-Maury, P. and Sultan, E.}
}
@article {5819,
	title = {{Large and local-scale influences on physical and chemical characteristics of coastal waters of Western Europe during winter}},
	journal = {Journal of Marine Systems},
	volume = {139},
	year = {2014},
	pages = {79{\textendash}90},
	abstract = {<p>There is now a strong scientific consensus that coastal marine systems of Western Europe are highly sensitive to the combined effects of natural climate variability and anthropogenic climate change. However, it still remains challenging to assess the spatial and temporal scales at which climate influence operates. While large-scale hydro-climatic indices, such as the North Atlantic Oscillation (NAO) or the East Atlantic Pattern (EAP) and the weather regimes such as the Atlantic Ridge (AR), are known to be relevant predictors of physical processes, changes in coastal waters can also be related to local hydro-meteorological and geochemical forcing. Here, we study the temporal variability of physical and chemical characteristics of coastal waters located at about 48{\textdegree}N over the period 1998-2013 using (1) sea surface temperature, (2) sea surface salinity and (3) nutrient concentration observations for two coastal sites located at the outlet of the Bay of Brest and off Roscoff, (4) river discharges of the major tributaries close to these two sites and (5) regional and local precipitation data over the region of interest. Focusing on the winter months, we characterize the physical and chemical variability of these coastal waters and document changes in both precipitation and river runoffs. Our study reveals that variability in coastal waters is connected to the large-scale North Atlantic atmospheric circulation but is also partly explained by local river influences. Indeed, while the NAO is strongly related to changes in sea surface temperature at the Brest and Roscoff sites, the EAP and the AR have a major influence on precipitations, which in turn modulate river discharges that impact sea surface salinity at the scale of the two coastal stations. {\textcopyright} 2014 Elsevier B.V.</p>
},
	keywords = {Climate variability, Coastal systems, Large-scale hydro-climatic indices, River inputs, Time-series, Weather regimes},
	issn = {09247963},
	author = {Paul Tr{\'e}guer and Goberville, Eric and Barrier, Nicolas and St{\'e}phane L{\textquoteright}Helguen and Morin, Pascal and Bozec, Yann and Rimmelin-Maury, Peggy and Czamanski, Marie and Emilie Grossteffan and Cariou, Thierry and R{\'e}p{\'e}caud, Michel and Qu{\'e}m{\'e}ner, Loic}
}
