A5075966291- Oceanographic and Atmospheric Processes
- Geology and Paleoclimatology Research
- Climate variability and models
- Methane Hydrates and Related Phenomena
- Marine and coastal ecosystems
- Tropical and Extratropical Cyclones Research
- Ocean Waves and Remote Sensing
- Geological formations and processes
- Marine and fisheries research
- Atmospheric and Environmental Gas Dynamics
- Arctic and Antarctic ice dynamics
- Underwater Acoustics Research
- Geological Studies and Exploration
- Reservoir Engineering and Simulation Methods
- Seismic Imaging and Inversion Techniques
- Oil Spill Detection and Mitigation
- Coastal and Marine Management
- Marine and environmental studies
- Ocean Acidification Effects and Responses
- earthquake and tectonic studies
- Underwater Vehicles and Communication Systems
- Arctic and Russian Policy Studies
- Hydrocarbon exploration and reservoir analysis
- Tactile and Sensory Interactions
- Geological and Tectonic Studies in Latin America
Woods Hole Oceanographic Institution
2015-2024
Georgia Institute of Technology
2023
Royal Netherlands Institute for Sea Research
2016-2020
Johns Hopkins University
2020
Utrecht University
2020
University of Colorado Boulder
2017-2018
North Carolina State University
2018
Leidos (United States)
2017
Duke University
2016
Brown University
2004-2008
An array of overturning data The Atlantic meridional circulation (AMOC) has a strong influence on climate, so it is important to understand how global warming may affect it. Lozier et al. report initial results from the Overturning in Subpolar North Program (OSNAP) (see Perspective by Rhein). OSNAP been measuring flux water transported high latitudes Atlantic. measurements reveal variability transport region and show that deep formation Labrador Sea not, as previously believed, be major...
Abstract For decades oceanographers have understood the Atlantic meridional overturning circulation (AMOC) to be primarily driven by changes in production of deep-water formation subpolar and subarctic North Atlantic. Indeed, current Intergovernmental Panel on Climate Change (IPCC) projections an AMOC slowdown twenty-first century based climate models are attributed inhibition deep convection However, observational evidence for this linkage has been elusive: there no clear demonstration...
The nature and circulation of water masses in the Persian/Arabian Gulf (hereinafter referred to as Gulf) is investigated by examination a historic database hydrographic observations. densest forms winter at northern end rather than along warmer southern western coasts. With exception small amounts directly above seafloor, most flowing out mixes across density front that separates Deep Water within from Indian Ocean Surface (IOSW). Contrary previous inferences, seasonally variable incursion...
A unique set of Lagrangian observations has recently been collected in the Gulf Stream using newly developed isopycnal RAFOS float. Between January, 1984 and October, 1985, thirty-seven these drifters were launched main thermocline current off Cape Hatteras lacked acoustically downstream for 30 or 45 days. Temperature pressure also recorded along each float trajectory. The capability this drifter allows it to follow fluid parcel pathways quite accurately sloping density surfaces Stream....
Recent observations of fluid parcel pathways in the Gulf Stream using isopycnal RAFOS floats revealed a striking pattern cross-stream and vertical motion associated with meanders (Bower Rossby 1989). In an attempt to explain observed pattern, two-dimensional kinematic model meandering jet has been developed which enables examination relationship between streamfunction patterns trajectories. The fields are displayed reference frame moving wave so motions parcels relative can be seen more...
The Gulf Stream '60 hydrographic survey has been used to examine the distribution of water properties across as a function potential density. This covered half million square miles Slope, and Sargasso Sea Waters in western North Atlantic. Quantities plotted density are acceleration potential, temperature, desso1ved oxygen vorticity. transition from Water Slope upper thermocline (σ0<27.1) is sharp coincides closely with dynamical boundary Stream, defined by gradient potential. indicates that...
The overturning circulation in the Red Sea exhibits a distinct seasonally reversing pattern and is studied using high-resolution MIT general model simulations. In first part of this study, vertical horizontal structure summer its dynamical mechanisms are presented from results. seasonal water exchange Strait Bab el Mandeb successfully simulated, structures intruding subsurface Gulf Aden intermediate good agreement with observations 2011. results suggest that driven by combined effect...
The shallow winter overturning circulation in the Red Sea is studied using a 50 year highresolution MITgcm (MIT general model) simulation with realistic atmospheric forcing.The for typical year, represented by 1980, and climatological mean are analyzed model output to delineate three-dimensional structure investigate underlying dynamical mechanisms.The horizontal of 1980 dominated energetic eddies.The results suggest that surface inflow intensifies western boundary current southern switches...
Abstract The Lagrangian method—where current location and intensity are determined by tracking the movement of flow along its path—is oldest technique for measuring ocean circulation. For centuries, mariners used compilations ship drift data to map out surface currents major shipping routes global ocean. In mid‐20th century, technological advances in electronic navigation allowed oceanographers continuously track freely drifting buoys throughout ice‐free oceans begin construct basin‐scale,...
Abstract Changes in the Atlantic Meridional Overturning Circulation, which have potential to drive societally-important climate impacts, traditionally been linked strength of deep water formation subpolar North Atlantic. Yet there is neither clear observational evidence nor agreement among models about how changes influence overturning. Here, we use data from a trans-basin mooring array (OSNAP—Overturning Subpolar Program) show that winter convection during 2014–2018 interior basin had...
Abstract Understanding the variability of Atlantic Meridional Overturning Circulation is essential for better predictions our changing climate. Here we present an updated time series (August 2014 to June 2020) from in Subpolar North Program. The 6-year allows us observe seasonality subpolar overturning and meridional heat freshwater transports. peaks late spring reaches a minimum early winter, with peak-to-trough range 9.0 Sv. seasonal timing can be explained by winter transformation export...
Mediterranean eddies (meddies) play an important role in maintaining the temperature and salinity distributions North Atlantic, but relatively little is known about their early life histories, including where, how often, by what mechanism they form. A major field program, called Undercurrent Seeding Experiment, has been carried out to directly observe meddy formation spreading pathways of Water into Atlantic. Between May 1993 March 1994, 49 RAFOS floats were deployed sequentially south...
Historical hydrographic data and a numerical plume model are used to investigate the initial transformation, dynamics, spreading pathways of Red Sea Persian Gulf outflow waters where they enter Indian Ocean. The annual mean transport these outflows is relatively small (<0.4 Sv), but have major impact on properties Ocean at thermocline level because their high salinity. They different from other in that flow over very shallow sills (depth < 200 m) into highly stratified upper ocean...
Abstract Remote sensing and in situ observations are used to investigate the ocean response Tokar Wind Jet Red Sea. The wind jet blows down atmospheric pressure gradient through Gap on Sudanese coast, at about 19°N, during summer monsoon season. It disturbs prevailing along‐sea (southeastward) winds with strong cross‐sea (northeastward) that can last from days weeks reach amplitudes of 20–25 m/s. By comparing scatterometer along‐track gridded sea level anomaly observations, it is observed an...
Pair statistics are calculated for subsurface floats in the North Atlantic. The relative diffusivity (the derivative of mean square particle separation) is approximately constant at large scales both eastern and western basins, though implied scale energy-containing eddies greater west. But behavior times soon after pair deployment quite different two basins; west grows as distance to 4/3 power, consistent with an inverse turbulent cascade energy (or possibly mixing superimposed on a shear),...
Abstract Between 25 September 2007 and 28 2009, a heavily instrumented mooring was deployed in the Labrador Sea, offshore of location where warm-core, anticyclonic Irminger rings are formed. The 2-year time series offers insight into vertical horizontal structure newly formed their heat salt transport interior basin. In 2 years, 12 passed by mooring. Of these, 11 had distinct properties, while 1 anticyclone likely twice. Eddy radii (11–35 km) were estimated using dynamic height signal...