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Arctic Ocean freshwater content and its decadal memory of sea-level pressure ArchiMer
Johnson, Helen L.; Cornish, Sam B.; Kostov, Yavor; Beer, Emma; Lique, Camille.
Arctic freshwater content (FWC) has increased significantly over the last two decades, with potential future implications for the Atlantic meridional overturning circulation downstream. We investigate the relationship between Arctic FWC and atmospheric circulation in the control run of a coupled climate model. Multiple linear lagged regression is used to extract the response of total Arctic FWC to a hypothetical step increase in the principal components of sea‐level pressure. The results demonstrate that the FWC adjusts on a decadal timescale, consistent with the idea that wind‐driven ocean dynamics and eddies determine the response of Arctic Ocean circulation and properties to a change in surface forcing, as suggested by idealized models and theory....
Tipo: Text Palavras-chave: Arctic Ocean; Climate change; Interannual variability; Freshwater; Adjustment timescales; Ocean dynamics.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00440/55117/56571.pdf
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Characterizing, modelling and understanding the climate variability of the deep water formation in the North-Western Mediterranean Sea ArchiMer
Somot, Samuel; Houpert, Loic; Sevault, Florence; Testor, Pierre; Bosse, Anthony; Taupier-letage, Isabelle; Bouin, Marie-noelle; Waldman, Robin; Cassou, Christophe; Sanchez-gomez, Emilia; Durrieu De Madron, Xavier; Adloff, Fanny; Nabat, Pierre; Herrmann, Marine.
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 quantitative indicators include 31 observed years for the yearly maximum mixed layer depth over the period 1980–2013 and a detailed multi-indicator description of the period 2007–2013. Then a 1980–2013 hindcast simulation is performed with a fully-coupled regional climate system model including the high-resolution representation of the regional atmosphere, ocean, land-surface and rivers. The simulation reproduces...
Tipo: Text Palavras-chave: Deep water formation; Open-sea deep convection; Interannual variability; Mediterranean Sea; Regional climate models; Climate trends.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00348/45948/45654.pdf
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Atlas Hydrologique des eaux superficielles du plateau continental mauritanien OceanDocs
Dobrovine, B.; Mahfoudh, M.; Ould Dedah, S..
Ce volume du Bulletin Scientifique est entièrement consacré à l'atlas hydrologique des eaux superficielles du plateau continental mauritanien
Tipo: Journal Contribution Palavras-chave: Eaux de surface; Interannual variability; Amplitude saisonnière; Waters surface; Evolution saisonnière; Ecarts de température; Moyenne mensuelle; Moyenne saisonnière; Continental shelf; Mauritanie; Températures; Variations in temperature; Temperatures; Plateu continental; Mean seasonal range of temperature; Variabilité interannuelle; Mean Annual temperatures; Mauritania; Seasonal evolution; Températures moyennes annuelles; Oceanographic atlases; Hydrology.
Ano: 1990 URL: http://hdl.handle.net/1834/766
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