A5046016595- Oceanographic and Atmospheric Processes
- Marine and fisheries research
- Ocean Waves and Remote Sensing
- Marine and coastal ecosystems
- Coastal and Marine Dynamics
- Marine Bivalve and Aquaculture Studies
- Climate variability and models
- Geological formations and processes
- Tropical and Extratropical Cyclones Research
- Marine Ecology and Invasive Species
- Scientific Research and Discoveries
- Climate change and permafrost
- Seismic Waves and Analysis
- Geology and Paleoclimatology Research
- Aquatic and Environmental Studies
- Oil Spill Detection and Mitigation
Oregon State University
2003-2024
Mitsubishi Electric (United States)
2019
University of Massachusetts Dartmouth
2019
Woods Hole Oceanographic Institution
2019
Abstract Lateral stirring is a basic oceanographic phenomenon affecting the distribution of physical, chemical, and biological fields. Eddy at scales on order 100 km (the mesoscale) fairly well understood explicitly represented in modern eddy-resolving numerical models global ocean circulation. The same cannot be said for smaller-scale processes. Here, authors describe major field experiment aimed observing understanding processes responsible 0.1–10 km. Stirring varying intensity were...
Abstract We use moored observations in 80 m water depth at the NH‐10 site along historic Newport Hydrographic Line from 1999 to 2021 calculate temperature anomalies surface, near and bottom. Analysis is focused on subsurface temporal spatial characteristics of marine heatwaves (MHWs) during 2014–2016 2019–2020 continental shelf slope. Warm extend throughout column fall/winter when winds are predominantly downwelling‐favorable, while period characterized by shallower summer fall shelf....
The highly biologically productive northern California Current, which includes the Oregon continental shelf, is an archetypal eastern boundary region with summertime upwelling driven by prevailing equatorward winds and wintertime downwelling poleward winds. Between 1960 1990, monitoring programs process studies conducted off central coast advanced understanding of many oceanographic processes, including coastal trapped waves, seasonal in systems, variability currents. Starting 1997, U.S....
Abstract Two near‐surface dye releases were mapped on scales of minutes to hours temporally, meters order 1 km horizontally, and 1–20 m vertically using a scanning, depth‐resolving airborne lidar. In both cases, evolved into series rolls with their major axes approximately aligned the wind and/or current. roll spacing was also 5–10 times mixed layer depth, considerably larger than 1–2 aspect ratio expected for Langmuir cells. Numerical large‐eddy simulations under similar forcing showed...
The effects of wind-forced upwelling and downwelling on the continental shelf off Duck, North Carolina, are studied through experiments with a two-dimensional numerical primitive equation model. Moored shipboard measurements obtained during August–November 1994 as part Coastal Ocean Processes (CoOP) Inner Shelf Study (ISS) used for model–data comparisons. model is initialized realistic stratification forced observed wind heat flux data. Both strongly stratified weakly conditions, found...
Abstract Results are presented from two dye release experiments conducted in the seasonal thermocline of Sargasso Sea, one a region low horizontal strain rate (~10 −6 s −1 ), second intermediate −5 ). Both lasted ~6 days, covering spatial scales 1–10 and 1–50 km for regimes, respectively. Diapycnal diffusivities estimated were κ z = (2–5) × 10 m 2 , while isopycnal H (0.2–3) with range being less reflection site-to-site variability, more due to uncertainties background acting on patch...
Abstract. The coastal ocean may experience periods of fluctuating along-shelf wind direction, causing shifts between upwelling and downwelling conditions with responses that are not symmetric. We seek to understand these asymmetries their implications on the Eulerian Lagrangian flows. use a two-dimensional (variations across-shelf depth; uniformity along-shelf) primitive equation numerical model study shelf flows in presence periodic, zero-mean stress forcing. bathymetry initial...
Olympic Coast National Marine Sanctuary (OCNMS), which was established in 1994 and covers an area of 8257 km2, is located along Washington State's remote rugged outer coast towards the northernmost extent California Current System (CCS). In this region, summertime equatorward winds drive seasonal upwelling cold, nutrient rich waters onto continental shelf. These help fuel a highly diverse productive ecosystem that includes marine mammal seabird communities as well commercially culturally...
Abstract Outputs of the regional ocean circulation model are analyzed to demonstrate measurable impact El Niño remote oceanic forcing mechanism along US West Coast during major heat wave period 2014–2016. The 2‐km horizontal resolution model, based on Regional Ocean Modeling System (ROMS), was run for 2009–2018. Though does not assimilate observations, it performs well by comparison with time series data explaining observed variability temporal scales from several days seasonal and...