A5035171321- Oceanographic and Atmospheric Processes
- Climate variability and models
- Atmospheric and Environmental Gas Dynamics
- Arctic and Antarctic ice dynamics
- Marine and coastal ecosystems
- Methane Hydrates and Related Phenomena
- Geological Studies and Exploration
- Ocean Acidification Effects and Responses
- Ocean Waves and Remote Sensing
- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Arctic and Russian Policy Studies
- Geological and Geophysical Studies
- Reservoir Engineering and Simulation Methods
McGill University
2021-2025
GEOMAR Helmholtz Centre for Ocean Research Kiel
2015-2020
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...
Abstract Oceanic eddies are an important component in preconditioning the central Labrador Sea (LS) for deep convection and restratifying convected water. This study investigates different sources impacts of eddy kinetic energy (EKE) its temporal variability LS with help a 52-yr-long hindcast simulation 1/20° ocean model. Irminger Rings (IR) generated West Greenland Current (WGC) between 60° 62°N, mainly affect preconditioning, limit northward extent area. The IR exhibit seasonal cycle...
Abstract. The Agulhas Current, the western boundary current of South Indian Ocean, has been shown to play an important role in connectivity between and Atlantic oceans. greater Current system is highly dominated by mesoscale dynamics. To investigate their influence on regional global circulations, a family high-resolution ocean general circulation model configurations based NEMO code developed. Horizontal resolution refinement achieved embedding “nests” covering oceans at 1/10∘ (INALT10)...
Abstract A global ocean model with 1/12° horizontal resolution is used to assess the seasonal cycle of surface eddy kinetic energy (EKE). The reproduces salient features observed mean EKE, including amplitude and phase its in most parts ocean. In all subtropical gyres Pacific Atlantic, EKE peaks summer down a depth ∼350 m, below which weak. Investigation possible driving mechanisms reveals changes thermal interactions atmosphere be likely cause maximum EKE. development thermocline spring...
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 JRA55-do atmospheric dataset. motivate OMIP-2 over first OMIP (OMIP-1), previously referred to as Coordinated Ocean–ice Reference Experiments (CORE), via evaluation OMIP-1 and from eleven (11) state-of-the-science models. In evaluation, multi-model means are calculated separately overall performances assessed considering metrics...
Abstract Oceanic mesoscale variability contributes significantly to meridional heat transport (HT), especially in regions with high eddy kinetic energy such as the Southern Ocean (SO). However, there are gaps our understanding of contributions towards and within sea-ice covered due lack observations resolution ocean climate models. Using output from an idealized configuration a coupled ocean-sea ice model simulating SO at 10 km horizontal resolution, contribution full spectrum resolved...
Observations and numerical models reveal that mesoscale eddies are ubiquitous in the Arctic Ocean. These thought to play an important role particular transport of heat, salt nutrients from shelves deep basins, modulation sea ice cover, dynamical equilibrium Beaufort gyre. However, characteristics these poorly documented. Here, eddy detection tracking method is applied output a high resolution (1/12°) regional model - North Atlantic over period 1995-2020 investigate...
Abstract The eddy kinetic energy (EKE) associated with the Subtropical Countercurrent (STCC) in western subtropical South Pacific is known to exhibit substantial seasonal and decadal variability. Using an eddy-permitting ocean general circulation model, which able reproduce observed, salient features of cycles shear, stratification, baroclinic production, EKE, authors investigate changes EKE. show that STCC region exhibits, uniquely among gyres world’s oceans, significant, atmospherically...
Abstract. The Agulhas Current, the western boundary current of South Indian Ocean, has been shown to play an important role in connectivity between and Atlantic oceans. greater Current system is highly dominated by mesoscale dynamics. To investigate their influence onto regional global circulations, a family high-resolution ocean general circulation model configurations based on NEMO code developed. Horizontal resolution refinement achieved embedding nests covering oceans at 1/10° (INALT10)...
It is increasingly recognized that the way Southern Ocean mesoscale eddies are represented in ocean models influences air-sea CO2 fluxes and their response to climate change. In this study, we assess carbon uptake since 1960s a hierarchy of global biogeochemistry (GOBMs) based on NEMO-MOPS FESOM-REcoM models. The horizontal resolutions GOBMs range from 1° 0.5° (“eddy-parameterized”) 0.25° 0.1° (“eddy-rich”, where...
<p>Recent studies highlighted an increase in the Southern Ocean ventilation since several decades and, at same time, pronounced decadal fluctuations its carbon sink. The role of changing for anthropogenic CO<sub>2</sub> uptake (and thus overall sink) and oxygen concentrations mode intermediate waters (with possible impacts on low-oxygen regions downstream) are still poorly understood. aim this study is to assess storage atmospheric gases such as...
<p>Mesoscale variability and associated eddy fluxes play crucial roles in the ocean dynamics, transport of water mass properties ecology upper ocean. In Southern Hemisphere, where nearly zonal flow Antarctic Circumpolar Current (ACC) acts as a barrier to direct poleward toward Antarctica, flux across ACC is main mechanism that guarantees heat budget distributes physical biogeochemical between subtropical polar regions. We focused on high dynamical region located South-West...
<p>Recent studies point to pronounced decadal variability in the Southern Ocean carbon sink over past decades, but mechanisms are still not fully understood. In this study, regional patterns and bio-physical drivers of interannual-to-decadal air-sea CO<sub>2</sub> fluxes Antarctic Circumpolar Current (ACC) investigated. A suite global ocean biogeochemistry configurations (based on NEMO-MOPS model) is used perform hindcast experiments covering period...
<p>Observational estimates point to pronounced changes of the Southern Ocean carbon uptake in past decades, but mechanisms are still not fully understood. In this study we assess physical drivers variability a suite global ocean biogeochemistry models with 0.5º, 0.25º and 0.1º horizontal resolution as well 3-member ensemble performed an Earth System Model (ESM) sharing same model. The show positive trend...