A5003159720- Oceanographic and Atmospheric Processes
- Ocean Waves and Remote Sensing
- Marine and fisheries research
- Marine and coastal ecosystems
- Climate variability and models
- Tropical and Extratropical Cyclones Research
- Coastal and Marine Dynamics
- Arctic and Antarctic ice dynamics
- Marine Biology and Ecology Research
- Ocean Acidification Effects and Responses
- Marine Bivalve and Aquaculture Studies
- Coastal wetland ecosystem dynamics
- Coral and Marine Ecosystems Studies
- Geological formations and processes
- Geology and Paleoclimatology Research
- Underwater Acoustics Research
- Marine and coastal plant biology
- Marine Ecology and Invasive Species
- Meteorological Phenomena and Simulations
- Fish Ecology and Management Studies
- Geological Studies and Exploration
- Marine animal studies overview
- Oil Spill Detection and Mitigation
- Photonic Crystal and Fiber Optics
- Geological and Geophysical Studies
Oregon State University
2018-2024
University of Connecticut
2015-2017
University of California, Santa Barbara
2011-2012
Woods Hole Oceanographic Institution
2001-2011
University of South Florida St. Petersburg
2007
United States Army Corps of Engineers
2007
Cornell University
2000
Abstract From January 2014 to August 2016, sea surface temperatures (SSTs) along the Washington, Oregon, and California coasts were significantly warmer than usual, reaching a maximum SST anomaly of 6.2°C off Southern California. This marine heat wave occurred alongside Gulf Alaska resulted in major disturbances Current ecosystem massive economic impacts. Here we use satellite blended reanalysis products report magnitude, extent, duration, evolution SSTs wind stress anomalies West Coast...
Abstract Onshore volume transport (Stokes drift) due to surface gravity waves propagating toward the beach can result in a compensating Eulerian offshore flow surf zone referred as undertow. Observed flows indicate that wave-driven undertow extends well of zone, over inner shelves Martha’s Vineyard, Massachusetts, and North Carolina. Theoretical estimates from linear wave theory observed characteristics account for 50% or more variance water depths between 5 12 m, reproduce dependence on...
Strengths and weakness of remotely sensed winds are discussed, along with the current capabilities for sensing stress. Future missions briefly mentioned. The observational needs a wide range wind stress applications provided. These strongly support short list desired future constellations.
Ocean surface winds, currents, and waves play a crucial role in exchanges of momentum, energy, heat, freshwater, gases, other tracers between the ocean, atmosphere, ice. Despite being strongly coupled to upper ocean circulation overlying efforts improve atmospheric, wave observations models have evolved somewhat independently. From an observational point view, community bridge this gap led proposals for satellite Doppler oceanography mission concepts, which could provide unprecedented...
Abstract Six-yr-long time series of winds, waves, and water velocity from a cabled coastal observatory in 12 m reveal the separate dependence cross-shelf profile on along-shelf tides. During small wind is dominant mechanism driving circulation after tides tidal residual motions are removed. The does not drive substantial circulation. offshore upper column onshore lower column, with roughly equal opposite volume transports surface bottom layers. nearly reverse. observed profiles transport...
[1] Following relaxations of prevailing upwelling‐favorable winds, warm waters from the Santa Barbara Channel propagate poleward around Point Conception and along south central California coast. We examined characteristics these relaxation flows, including frontal propagation speed temperature changes during water arrivals, by using multiyear time series currents temperatures four moorings ∼15 m isobath, surface current observations high‐frequency radars, satellite sea images. Propagation...
One of the largest warm water anomalies (marine heat waves [MHWs]) ever recorded occurred in northeast Pacific during 2014--2016. This MHW was caused by large-scale atmospheric ridging and affected fisheries ecosystems from Alaska through California, including a bloom toxic algae spanning entire coastline. Regional variations severity are common along coastlines worldwide but generally unexplained. During 2014--16 MHW, summertime sea-surface temperature (SST) were often stronger southern...
The Oregon continental shelf is embedded within the northern California Current System, a wind-driven, eastern boundary system that includes equatorward flowing and poleward Undercurrent. During spring summer months, winds drive upwelling of cold, nutrient-rich, oxygen-poor waters from depth onto shelf, fueling highly productive marine ecosystem supports several valuable commercial fisheries. This data article describes time series hydrographic collected on biweekly to monthly schedule March...
Ocean-surface vector winds, currents, and their interaction play critical roles in shaping many aspects of the Earth’s environment (e.g., weather, climate, marine ecosystems, ocean health), affecting human safety wellbeing both on land at sea. However, there are significant capability gaps observing interaction. At present, global gridded products surface currents have coarse (~150 km) feature resolutions rely theoretical assumptions that break down near equator. Moreover, is no...
The subtidal, depth‐average momentum balances in 12 m and 27 water depth are investigated using observations from 2001 to 2007 of velocity, temperature, density; bottom pressure; surface gravity waves; wind stress. In the fluctuating across‐shelf budget, dominant terms stress, pressure gradient, Coriolis acceleration. balance is a combination (1) geostrophic expected at midshelf sites (2) coastal setup setdown driven by stress where boundary layers overlap. At site, estimated wave radiation...
In summer on the shallow New England continental shelf, near coast water temperature is much cooler than observed surface heat flux suggests. Using depth‐integrated budgets in 12 and 27 m depth calculated from flux, temperature, velocity, we demonstrate that time scales of weeks to months persistently cooled due a mean upwelling circulation. Because wind weak, circulation likely not driven; it partly tidal residual A feedback exists between cross‐shelf fluxes: two fluxes remain nearly...
Abstract Over the California Current upwelling system in summer, prevailing upwelling‐favorable winds episodically weaken (relax) or reverse direction for a few days. Near Pt. Conception, California, wind usually does not reverse, but relaxation allows poleward oceanic coastal flow with ecological consequences. To determine offshore extent and synoptic forcing of these relaxations, we formed composite averages stress from QuikSCAT satellite atmospheric pressure North American Regional...
Abstract Sea‐surface albedo is a combination of surface‐reflected and water‐leaving irradiance, but irradiance typically contributes less than 15% the total in open‐ocean conditions. In coastal systems, however, bottom substrate or suspended particulate matter can increase amount backscattered light, thereby increasing decreasing net shortwave surface heat flux. Here sensitivity analysis using observations models predicts effect light scattering on flux for three test cases: bright sand...
Abstract In upwelling regions, wind relaxations lead to poleward propagating warm water plumes that are important coastal ecosystems. The ocean response relaxation around Pt. Conception, CA is simulated with a Regional Ocean Model (ROMS) forced by realistic surface and lateral boundary conditions including tidal processes. model reproduces well the statistics of observed subtidal column temperature velocity at both outer inner‐shelf mooring locations throughout study. A poleward‐propagating...
Abstract The Santa Barbara Channel, California, experiences large temperature fluctuations during summer that have been associated with the input of nutrients to euphotic zone. We studied in diurnal and semidiurnal bands, which account for as much 65% total variance. analyzed data from 25 moorings along mainland Northern Channel Islands deployed at depths 8–18 m 1999–2012. In band, vary almost simultaneously within two distinct regions, a lag 5 h between regions: east Point Conception west...
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....
Abstract In the Santa Barbara Channel, California, and around Northern Channel Islands, water temperature fluctuations in diurnal semidiurnal frequency bands are intermittent, with amplitudes that vary on time scales of days to weeks. The cause this intermittency is not well understood. We studied effects barotropic tide, vertical stratification, propagation coastal‐trapped waves, regional wind relaxations, diurnal‐band winds during 1992–2015. used data from 43 moorings 10–200 m depth two...
Abstract Photosynthetic conversion of to organic carbon and the transport this from surface deep ocean is an important regulator atmospheric . To understand controls on fluxes in a productive region impacted by upwelling, we measured biological productivity via multiple methods during cruise Monterey Bay, California. We quantified net community production gross primary measurements /Ar triple isotopes ( ), respectively. simultaneously conducted incubations measuring uptake 14 C, ,...
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....