Coralie PerrucheMercator Ocean · R&D
Coralie Perruche
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24
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Introduction
Publications
Publications (24)
Quantification of oxygen uptake at the ocean surface and its surface‐to‐interior pathways is crucial for understanding oxygen concentration change in a warming ocean. We investigate the mean meridional global oxygen transport between 1950 and 2009 using coupled physical‐biogeochemical model output. We introduce a streamfunction in latitude‐oxygen c...
Numerical models of ocean biogeochemistry are becoming the major tools used to detect and predict the impact of climate change on marine resources and to monitor ocean health. However, with the continuous improvement of model structure and spatial resolution, incorporation of these additional degrees of freedom into fidelity assessment has become i...
Regional processes play a key role in the global carbon budget. Major ocean CO2 uptake at mid-latitudes counteracts CO2 release in the tropics, which is modulated by episodes of marine heatwaves. Yet, we lack essential knowledge on persistent marine heatwaves, and their effect on the CO2 sensitive areas. Here we show, using a 1985–2017 joint analys...
Monitoring and predicting global ocean biogeochemistry and marine ecosystems is one of the biggest challenges for the coming decade. In operational systems, biogeochemical (BGC) models are forced - or coupled - with physical ocean models fields that are generally constrained by data assimilation of temperature, salinity and sea level anomalies. Yet...
Regional processes play a key role in the global carbon budget. Major ocean carbon uptake at mid-latitudes counteracts carbon release in the tropics, which is modulated by episodes of marine heatwaves (MHWs). Yet, we lack essential knowledge on persistent MHWs (PMHWs), and their effect on the carbon sensitive areas. Here, based on a 1985-2017 joint...
Numerical models of ocean biogeochemistry are becoming a major tool to detect and predict the impact of climate change on marine resources and ocean health. Classically, the validation of such models relies on comparison with surface quantities from satellite (such as chlorophyll-a concentrations), climatologies, or sparse in situ data (such as cru...
The surface fugacity of CO2 (fCO2) has been measured hourly at a mooring at 8°N, 38°W, using a spectrophotometric CO2 sensor, from June to October 2013. In September 2013, the fCO2 and the sea surface salinity (SSS) decrease significantly. The high precipitation due to the presence of the Intertropical Convergence Zone (ITCZ) and the propagation of...
Numerical models of ocean biogeochemistry are becoming a major tool to detect and predict the impact of climate change on marine resources. The validation of such models is strongly limited by the availability of data as it relies principally on comparison with climatologies, few permanent fixed oceanic stations and surface chlorophyll-a concentrat...
Following the anomalous warming event occurring in the tropical North Atlantic in 2010, higher than usual surface fugacity of CO2 (fCO2) was observed. To evaluate the spatial extent of these anomalies and their drivers, and to quantify the sea‐air CO2 flux at basin scale, the Mercator‐Ocean model is used from 2006 to 2014 within the region 0–30°N,...
Ocean ecosystems are subject to a multitude of stressors, including changes in ocean physics and biogeochemistry, and direct anthropogenic influences. Implementation of protective and adaptive measures for ocean ecosystems requires a combination of ocean observations with analysis and prediction tools. These can guide assessments of the current sta...
The European Reanalysis of Global Climate Observations 2 (ERA-CLIM2) is a European Union Seventh Framework Project started in January 2014 and due to be completed in December 2017. It aims to produce coupled reanalyses, which are physically consistent datasets describing the evolution of the global atmosphere, ocean, land surface, cryosphere, and t...
The Copernicus Marine Environment Monitoring Service (CMEMS) Ocean State Report (OSR) provides an annual report of the state of the global ocean and European regional seas for policy and decision-makers with the additional aim of increasing general public awareness about the status of, and changes in, the marine environment. The CMEMS OSR draws on...
The relative skill of 21 regional and global biogeochemical models was assessed in terms of how well the models reproduced observed net primary productivity (NPP) and environmental variables such as nitrate concentration (NO3), mixed layer depth (MLD), euphotic layer depth (Zeu), and sea ice concentration, by comparing results against a newly updat...
The combination of climate change and various anthropogenic drivers,
such as e.g. changes in external nutrient inputs and exploitation of
marine resources drive important changes in marine ecosystems. These
changes occur against the background of natural variability. The
retrospective analysis of global ocean biogeochemical state holds
promise for...
This paper aims at studying numerically the competition between two mutually exclusive phytoplankton species in a fully-turbulent field consisting of interacting mesoscale and submesoscale structures. A simple NPPZD ecosystem model is embedded in a Surface Quasi-Geostrophic model which is able to reproduce frontogenesis and the associated nutrient...
This paper aims at studying analytically the functioning of a very simple ecosystem model with two phytoplankton species. First, using the dynamical system theory, we determine its nonlinear equilibria, their stability and characteristic timescales with a focus on phytoplanktoncompetition. Particular attention is paid to the model sensitivity to pa...
The ocean is characterized by a high degree of turbulence with energetic eddies interacting together. In surface layers, observations and modeling studies reveal that mesoscale and submesoscale dynamics associated with the mixed layer dynamics strongly constrain the distribution of phytoplankton species. The aim of this PhD thesis is to carry out a...
L'océan est un milieu fortement turbulent caractérisé notamment par de nombreuses structures tourbillonnaires très énergétiques interagissant entre elles. Dans les couches de surface, les observations ainsi que les modèles montrent que cette dynamique mésoéchelle et submésoéchelle combinée à la dynamique de la couche mélangée, contraint fortement l...