A5021894291- Oceanographic and Atmospheric Processes
- Ocean Waves and Remote Sensing
- Tropical and Extratropical Cyclones Research
- Climate variability and models
- Coastal and Marine Dynamics
- Meteorological Phenomena and Simulations
- Methane Hydrates and Related Phenomena
- Geophysics and Gravity Measurements
- Atmospheric and Environmental Gas Dynamics
- Seismic Waves and Analysis
- Marine and coastal ecosystems
- Arctic and Antarctic ice dynamics
- Geological and Geophysical Studies
- Theoretical and Computational Physics
- Advanced MIMO Systems Optimization
- Quantum chaos and dynamical systems
- Atmospheric Ozone and Climate
- Spectroscopy and Quantum Chemical Studies
- Advanced Wireless Communication Technologies
- Geology and Paleoclimatology Research
- Aeolian processes and effects
- Maritime Transport Emissions and Efficiency
- Cooperative Communication and Network Coding
- Marine and environmental studies
Stennis Space Center
2015-2023
United States Naval Research Laboratory
2016-2020
Thomas Jefferson National Accelerator Facility
2016
NOAA Geophysical Fluid Dynamics Laboratory
2010-2014
Princeton University
2010-2014
University of Rhode Island
2005-2010
University of Massachusetts Dartmouth
2005
Abstract The performance of the wave model WAVEWATCH III under a very strong, category 5, tropical cyclone wind forcing is investigated with different drag coefficient parameterizations and ocean current inputs. results are compared field observations surface spectra from an airborne scanning radar altimeter, National Data Buoy Center (NDBC) time series, satellite altimeter measurements in Hurricane Ivan (2004). suggest that original parameterization tends to overestimate significant height...
Abstract The impacts of parameterized upper-ocean wave mixing on global climate simulations are assessed through modification to Large et al.’s K-profile ocean boundary layer parameterization (KPP) in a coupled atmosphere–ocean–wave model. authors consider three parameterizations and focus high-latitude mixed depths related diagnostics. McWilliams Sullivan (MS2000) adds Langmuir turbulence enhancement the nonlocal component KPP. It is found that turbulence–induced provided by this too strong...
The sea state of the Beaufort and Chukchi seas is controlled by wind forcing amount ice-free water available to generate surface waves. Clear trends in annual duration open season extent seasonal ice minimum suggest that should be increasing, independent changes forcing. Wave model hindcasts from four selected years spanning recent conditions are consistent with this expectation. In particular, larger waves more common less summer and/or a longer season, peak wave periods generally longer....
Abstract In this paper, the wind–wave–current interaction mechanisms in tropical cyclones and their effect on surface wave ocean responses are investigated through a set of numerical experiments. The key element authors’ modeling approach is air–sea interface model, which consists boundary layer model an momentum flux budget model. results show that time spatial variations field, as well wave–current interaction, significantly reduce into currents right rear quadrant hurricane. reduction...
Abstract This study describes a 29-yr (1981–2009) global ocean surface gravity wave simulation generated by coupled atmosphere–wave model using NOAA/GFDL’s High-Resolution Atmosphere Model (HiRAM) and the WAVEWATCH III developed used operationally at NOAA/NCEP. Extensive evaluation of monthly mean significant height (SWH) against in situ buoys, satellite altimeter measurements, 40-yr ECMWF Re-Analysis (ERA-40) show very good agreements terms magnitude, spatial distribution, scatter. The...
Abstract The seasonal structure of the wind sea and swell is analyzed from existing 29-yr surface gravity wave climatology produced using a coupled atmosphere–wave model. energy fraction analysis shows that dominates most World Ocean basins for all four seasons, Southern swells dominate in global ocean. are loosely correlated with midlatitude storm region both hemispheres, while their distribution propagation direction do not show any relation local winds vary significantly season because...
Abstract Surface wind (U10) and significant wave height (Hs) response to global warming are investigated using a coupled atmosphere–wave model by perturbing the sea surface temperatures (SSTs) with anomalies generated Working Group on Coupled Modeling (WGCM) phase 3 of Model Intercomparison Project (CMIP3) models that use Intergovernmental Panel Climate Change Fourth Assessment Report (IPCC AR4)/Special Emissions Scenarios A1B (SRES A1B) scenario late in twenty-first century. Several...
Abstract Simultaneous wind and wave measurements have been obtained inside tropical cyclones in several hurricane hunter missions. Analyses of these datasets show that the surface development hurricanes follows essentially same duration- fetch-limited growth functions established steady forcing conditions. This paper explores application parameterization wind-wave systems to quantify energy momentum exchanges from an initially limited input environmental parameters, such as field alone. A...
Abstract Directional wave spectra acquired in hurricane reconnaissance missions are compared with wind-wave spectral models. The comparison result is quantified two indices of model–measurement agreement. In the main region coverage, vary sinusoidally azimuth angle referenced to heading while showing a weak dependence on radial distance from center. measured agree well three models evaluated back and right quarters, they underdeveloped front left quarters. local wind directions also show...
  In this study, a hydrostatic model - the Navy Coastal Ocean Model (NCOM) is used to analyze temporal evolution of cold filament under moderate wind (along / cross filament) and surface cooling forcing conditions. The experimental framework adhered setup in large eddy simulations by Sulllivan McWilliams (2018). For each scenario, impact horizontal resolutions systematically explored through varies 100 m, 50 20 m; influence mixing investigated adjusting Smagorinsky constant...
Spectral properties near the dominant wave region influence significantly surface roughness relevant to ocean remote sensing employing low-frequency microwave sensors. The critical parameters characterizing waves are wind speed and dimensionless spectral peak frequency, which is inverse age. frequency can be expressed as an equivalent fetch or duration. connection between slope. This paper presents a model designed for sensing, with special emphasis on tropical cyclone (TC) applications. key...
Abstract This study provides an overview of the surface gravity wave dynamics in Gulf Mexico (GoM) using numerical simulations. The focus is on effects ocean currents waves, and geographic distribution statistics parameters related to role waves both sides ocean‐atmosphere interface. Simulations are performed Simulating WAves Nearshore (SWAN) model with without coupling Regional Ocean Modeling System (ROMS) within Coupled Atmosphere Wave Sediment Transport (COAWST) framework. In GoM, alter...
Abstract In coupled ocean–atmosphere models, it is usually assumed that the momentum flux into ocean currents equal to from air (wind stress). However, when surface wave field grows (decays) in space or time, gains (loses) and reduces (increases) subsurface compared wind. particular, under tropical cyclone (TC) conditions complex fast varying time may significantly affect wind ocean. this paper, numerical experiments are performed investigate budget across air–sea interface both uniform...
Abstract A large-eddy simulation (LES) model is configured to investigate the effect of horizontal (northward) component Earth’s rotation on upper-ocean turbulence. The focus variability with latitude/hemisphere in presence surface gravity waves and when capped by a stable stratification beneath layer. When included, mean flow, turbulence, vertical mixing depend wind direction. value are largest tropics decrease increasing latitudes. turbulent flows direction different at latitudes opposite...
Abstract The role of gas bubbles on the air‐sea CO 2 flux during Hurricane Frances (2004) is studied using a large‐eddy simulation model that couples ocean surface boundary layer turbulence, bubbles, and dissolved gases. In subtropical where gases are slightly supersaturated, in can still dissolve due to hydrostatic pressure tension exerted bubbles. Under simulated conditions, efflux with an explicit bubble effect less than 2% calculated formula without inclusion effect. use parameterization...
Abstract A more complete wind stress τ n formulation takes into account the ocean surface currents V o , while conventional c popularly used in circulation models is only a function of 10-m winds 10 . An analytical solution derived for difference Sverdrup transport induced by using instead scaling analysis indicates 6% reduction North Pacific (i.e., Kuroshio East China Sea) when Ekman velocity dominates currents. Because quadratic nature stress, four nonlinear terms contribute equally to...
Abstract A comprehensive in situ data set was obtained for the purpose of testing upper ocean turbulence models. The collected 38 m deep water over North Carolina shelf. Available time series surface meteorological forcing, including waves, winds, and heat fluxes, as well underwater profiles temperature, salinity, horizontal velocity, were found suitable constraining numerical models realistic environmental scenarios coastal ocean. Navy Coastal Ocean Model tested a vertical 1‐D mode with...