Eric P. Chassignet
A5044638051- Oceanographic and Atmospheric Processes
- Climate variability and models
- Meteorological Phenomena and Simulations
- Marine and coastal ecosystems
- Arctic and Antarctic ice dynamics
- Tropical and Extratropical Cyclones Research
- Ocean Waves and Remote Sensing
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Atmospheric and Environmental Gas Dynamics
- Reservoir Engineering and Simulation Methods
- Geological Studies and Exploration
- Geophysics and Gravity Measurements
- Oil Spill Detection and Mitigation
- Marine and fisheries research
- Geological formations and processes
- Geological and Geophysical Studies
- Hydrocarbon exploration and reservoir analysis
- Ocean Acidification Effects and Responses
- Advanced Computational Techniques and Applications
- Marine Biology and Ecology Research
- Underwater Acoustics Research
- Environmental Monitoring and Data Management
- Geomagnetism and Paleomagnetism Studies
- Solar and Space Plasma Dynamics
Florida State University
2016-2025
Louisiana State University
2024
University of Oslo
2018
Institut de physique du globe de Paris
2018
HR Wallingford
2018
University of Delaware
2018
University of Plymouth
2018
University of Hull
2018
Florida Agricultural and Mechanical University
2018
Oceanography Society
2007-2016
We present a new surface-atmospheric dataset for driving ocean–sea-ice models based on Japanese 55-year atmospheric reanalysis (JRA-55), referred to here as JRA55-do. The JRA55-do aims replace the CORE interannual forcing version 2 (hereafter called dataset), which is currently used in framework of Coordinated Ocean-ice Reference Experiments (COREs) and Ocean Model Intercomparison Project (OMIP). A major improvement refined horizontal grid spacing ( ∼ 55 km) temporal interval (3 hr). data...
Lagrangian analysis is a powerful way to analyse the output of ocean circulation models and other velocity data such as from altimetry. In approach, large sets virtual particles are integrated within three-dimensional, time-evolving fields. Over several decades, variety tools methods for this purpose have emerged. Here, we review state art in field data, starting fundamental kinematic framework with focus on large-scale open applications. Beyond use explicit fields, consider influence...
Abstract : The main objective is to use the HYbrid Coordinate Ocean Model (HYCOM) with data assimilation in an eddy-resolving, fully global ocean prediction system transition Naval Oceanographic Office (NAVOCEANO) at .08 deg equatorial (~7 km mid-latitude) resolution 2007 and .04 by 2011. model will include shallow water a minimum depth of 5 m provide boundary conditions finer coastal regional models that may HYCOM or different model. In addition, be coupled atmospheric, ice bio-chemical...
Abstract. The Ocean Model Intercomparison Project (OMIP) is an endorsed project in the Coupled Phase 6 (CMIP6). OMIP addresses CMIP6 science questions, investigating origins and consequences of systematic model biases. It does so by providing a framework for evaluating (including assessment biases), understanding, improving ocean, sea-ice, tracer, biogeochemical components climate earth system models contributing to CMIP6. Among WCRP Grand Challenges (GCs), primarily contributes regional sea...
The viability of a generalized (Hybrid) Coordinate Ocean Model (HYCOM), together with the importance thermobaricity and choice reference pressure, is demonstrated by analyzing simulations carried out using World Circulation Experiment (WOCE) Community Modeling (CME) Atlantic basin configuration. standard hybrid vertical coordinate configuration designed to remain isopycnic throughout as much water column possible while smoothly making transition level (pressure) coordinates in regions weak...
Diapycnal mixing plays a primary role in the thermodynamic balance of ocean and, consequently, oceanic heat and carbon uptake storage. Though observed rates are on average consistent with values required by inverse models, recent attention has focused dramatic spatial variability, spanning several orders magnitude, both upper deep ocean. Away from boundaries, spatio-temporal patterns largely driven geography generation, propagation dissipation internal waves, which supply much power for...
We revisit the challenges and prospects for ocean circulation models following Griffies et al. (2010). Over past decade, evolved through improved understanding, numerics, spatial discretization, grid configurations, parameterizations, data assimilation, environmental monitoring, process-level observations modeling. Important large scale applications over last decade are simulations of Southern Ocean, Meridional Overturning Circulation its variability, regional sea level change. Submesoscale...
In 2018 we celebrated 25 years of development radar altimetry, and the progress achieved by this methodology in fields global coastal oceanography, hydrology, geodesy cryospheric sciences. Many symbolic major events have these developments, e.g., Venice, Italy, 15th (2006) 20th (2012) more recently, 2018, Ponta Delgada, Portugal, Years Progress Radar Altimetry. On latter occasion it was decided to collect contributions scientists, engineers managers involved worldwide altimetry community...
Abstract The impact of horizontal resolution (1/12° to 1/50°; 6 1.5 km at midlatitudes) on Gulf Stream separation, penetration, and variability is quantified in a series identical North Atlantic experiments. questions the authors seek address are twofold: 1) Is realism modeled solution increased as increased? 2) How robust mesoscale submesoscale eddy activity function grid spacing how representative it interior quasigeostrophic (QG) or surface (SQG) turbulence? This study shows that (i)...
Abstract. We present a new framework for global ocean–sea-ice model simulations based on phase 2 of the Ocean Model Intercomparison Project (OMIP-2), making use surface dataset Japanese 55-year atmospheric reanalysis driving models (JRA55-do). motivate OMIP-2 over first OMIP (OMIP-1), previously referred to as Coordinated Ocean–ice Reference Experiments (COREs), via evaluation OMIP-1 and from 11 state-of-the-science models. In evaluation, multi-model ensemble means spreads are calculated...
Plastic is the most abundant type of marine litter and it found in all world’s oceans seas, even remote areas far from human activities. It a major concern because plastics remain for long time. To address questions that are great interest to international community as seeks attend sources ocean, we use particle tracking simulations simulate motions mismanaged plastic waste provide quantitative global estimate (1) where does released into ocean by given country go (2) on coastline come from....
Marine plastic pollution poses a potential threat to the ecosystem, but sources and their magnitudes remain largely unclear. Existing bottom-up emission inventories vary among studies for two three orders of (OMs). Here, we adopt top-down approach that uses observed dataset sea surface concentrations an ensemble ocean transport models reduce uncertainty global discharge. The optimal estimation emissions in this study varies about 1.5 OMs: 0.70 (0.13-3.8 as 95% confidence interval) million...
Since the pioneering work of Nof, determination westward drift mesoscale eddies under planetary (beta) effect has been a recurrent theme in oceanography, and several different formulae have proposed literature. Here, recpatiulation is sought, and, within confines single-layer model, generalized formula derived. Although it similar to Nof's, present established from modified definition with fewer assumptions. It also recaptiulates all other for one-layer model applies wide variety situations,...
Oceanic overflows are bottom-trapped density currents originating in semienclosed basins, such as the Nordic seas, or on continental shelves, Antarctic shelf. Overflows source of most abyssal waters, and therefore play an important role large-scale ocean circulation, forming a component sinking branch thermohaline circulation. As they descend slope, mix vigorously with surrounding oceanic changing their transport significantly. These mixing processes occur spatial scales well below...
Abstract : Sudden tropical cyclone (TC) intensification has been linked with high values of upper ocean heat content contained in mesoscale features, particularly warm eddies, provided that atmospheric conditions are also favorable. Although understanding air-sea interaction for TCs is evolving, this manuscript summarizes some the current work being carried out to investigate role plays TC and use parameters forecasting intensity.
Abstract Purpose of Review Assessment the impact ocean resolution in Earth System models on mean state, variability, and future projections discussion prospects for improved parameterisations to represent mesoscale. Recent Findings The majority centres participating CMIP6 employ components with resolutions about 1 degree their full (eddy-parameterising models). In contrast, there are also submitted (both DECK HighResMIP) that approximately 1/4 1/10 (eddy-present eddy-rich Evidence date...