A5073565562- Oceanographic and Atmospheric Processes
- Marine and coastal ecosystems
- Tropical and Extratropical Cyclones Research
- Arctic and Antarctic ice dynamics
- Ocean Acidification Effects and Responses
- Marine Biology and Ecology Research
- Marine and fisheries research
- Marine Bivalve and Aquaculture Studies
- Geology and Paleoclimatology Research
- Marine Toxins and Detection Methods
- Marine and environmental studies
- Methane Hydrates and Related Phenomena
- Coastal and Marine Dynamics
- Granular flow and fluidized beds
- Ocean Waves and Remote Sensing
- Fish Ecology and Management Studies
- Meteorological Phenomena and Simulations
- Climate variability and models
- Environmental Toxicology and Ecotoxicology
- Hydrology and Sediment Transport Processes
- Food Industry and Aquatic Biology
- Underwater Acoustics Research
- Geotechnical and Geomechanical Engineering
- Coastal wetland ecosystem dynamics
- Coral and Marine Ecosystems Studies
NOAA Pacific Marine Environmental Laboratory
2022-2024
National Oceanic and Atmospheric Administration
2024
University of Washington
2006-2022
Cooperative Institute for Research in Environmental Sciences
2020-2022
Sphere Institute
2018
UNSW Sydney
2009-2010
Abstract A coastwide bloom of the toxigenic diatom Pseudo‐nitzschia in spring 2015 resulted largest recorded outbreak neurotoxin, domoic acid, along North American west coast. Elevated toxins were measured numerous stranded marine mammals and geographically extensive prolonged closures razor clam, rock crab, Dungeness crab fisheries. We demonstrate that this was initiated by anomalously warm ocean conditions. australis thrived north its typical range warm, nutrient‐poor water spanned...
River Influences on Shelf Ecosystems (RISE) is the first comprehensive interdisciplinary study of rates and dynamics governing mixing river coastal waters in an eastern boundary current system, as well effects resultant plume phytoplankton standing stocks, growth grazing rates, community structure. The RISE Special Volume presents results deduced from four field studies two different numerical model applications, including ecosystem model, buoyant originating Columbia River. This...
Abstract A realistic numerical model is used to study the circulation and mixing of Salish Sea, a large, complex estuarine system on United States Canadian west coast. The Sea biologically productive supports many important fisheries but threatened by recurrent hypoxia ocean acidification, so clear understanding its patterns residence times value. exchange flow quantified at 39 sections over 3 years (2017–2019) using Total Exchange Flow method. Vertical in 37 segments between as opposing...
A heatwave that blanketed the northeast Pacific Ocean in 2013–2015 had severe impacts on marine ecosystem through altered species composition and survival. direct result of this was a sustained, record-setting harmful algal bloom (HAB), caused by toxigenic diatom, Pseudo-nitzschia , led to an unprecedented delay harvest opportunity for commercial Dungeness crab ( Metacarcinus magister ) closure other recreational, tribal shellfish harvest, including razor clams. Samples collected during...
Abstract Observational and model estimates of the form drag on Three Tree Point, a headland located in tidal channel Puget Sound, Washington, are presented. Subsurface, Point is sloping ridge. Tidal flow over this ridge gives rise to internal lee waves that lead wave enhanced mixing. At same time, horizontal separation produces eddy distorts surface height field point. Two observational methods for estimating portion associated with deformation field, referred here as “external” drag, also...
Abstract Momentum balances in the near-field region of a large, tidally pulsed river plume are examined. The authors concentrate on single ebb tide Columbia River plume, using Regional Ocean Modeling System (ROMS) configured to hindcast flow conditions Washington and Oregon shelves estuary. During ebb, plume-interior streamwise largely between advection, pressure gradient, frictional forces. Stream-normal this reduce centrifugal, cross-stream Coriolis terms (i.e., “gradient wind” balance...
Simultaneous in situ measurements of waves, currents and turbulence are presented to describe dissipation rates wave energy turbulent kinetic the windward coral reef‐lagoon system at Lady Elliot Island (LEI), Australia. The lagoon is tidally modulated strongly correlates with frictional due presence extremely rough bottom boundary. observed (TKE) rate, ε , this wave‐dominated much larger than recently reported values for unidirectional flows over natural fringing reefs. correlation between...
Temperature data collected in the shallow, tidally isolated reef flat/lagoon of Lady Elliot Island off Queensland, Australia, show marked variability under solar and tidal forcing. Sea level drops below height protective lagoon rim for a few hours during low tide, effectively isolating remaining water. Because is its temperature change (from diurnal forcing cooling) amplified. We develop simple analytical model to predict time evolution mean temperature, beginning with well‐mixed control...
The northern California Current System is impacted by two primary freshwater sources: the Strait of Juan de Fuca and Columbia River. frequently bidirectional in summer, with branches both north south river mouth simultaneously. We describe interaction these warm plumes each other colder plume originating from strait. interactions occurred when a period strong downwelling‐favorable winds high River discharge was followed persistent upwelling‐favorable winds. northward that developed under...
Observational estimates of entrainment and vertical salt flux into the tidally pulsed Columbia River plume are presented. Drifting buoys deployed in ebbing water downstream lift‐off region used to make measurements velocity, salinity, horizontal divergence surface layer. Drifters released near river mouth, shoreward propagating ocean‐plume front, catch up consistent with classical models front circulation. During their offshore transit, drifter streamwise velocities decrease while salinities...
Large rivers represent gateways for the transport of terrigenous and anthropogenic material to coastal ocean. Here we document a ∼700 km 2 recirculation or bulge associated with Columbia River plume that retains recently discharged river water sufficiently create regional bioreactor. Fueled by fluvial nitrate source, this feature stimulated growth across three trophic levels may buffer gateway system during periods increased warming stratification lead decreased ocean productivity,...
Abstract Moored observations are used to investigate the seasonal change in vertical structure of cross-shelf circulation at a midshelf location northern California Current System. A streamwise–normal coordinate system is employed eliminate meander- and eddy-induced biases flow that unaccounted for with an alternative, commonly applied approach. The resulting develops organized pattern midway through upwelling season. In particular, under upwelling-favorable conditions onshore return layer...
The lifespan of a barotropic tidal eddy generated by flow around coastal headland in deep (∼200 m) stratified water is examined. Field observations recorded the evolution flood tide from its generation, through release at turn tide, until dissipation during subsequent cycles. Ship‐based acoustic profiling reveals vortical structure that extends throughout depth. Tracks subsurface drifters successive days indicated was repeatable. Vorticity decay times, estimated combined set drifter tracks,...
Global change is impacting the oceans in an unprecedented way, and multiple lines of evidence suggest that species distributions are changing space time. There increasing environmental stressors act together to constrain habitat more than expected from warming alone. Here, we conducted a comprehensive study how temperature aragonite saturation state limit Limacina helicina, globally distributed pteropods ecologically important pelagic calcifiers indicator for ocean change. We co-validated...
A bulletin communicating risk of toxic Pseudo-nitzschia blooms to shellfish harvest along the open coast Pacific Northwest region United States (the northeast Ocean spanning Washington and Oregon) is discussed. This Harmful Algal Blooms (PNW HAB) Bulletin designed for managers with a focus on razor clam fishery, but may also be informative Dungeness crab fishery since domoic acid accumulation in crabs tends lag clams by couple weeks. The complements beach phytoplankton monitoring programs...
Ocean stratification on Arctic shelves critically influences nutrient availability, essential for primary production. However, discerning the changes in and their drivers is challenging. Through use of a high-resolution ocean–sea-ice model, this study investigates variability within northeastern Chukchi Sea over period from 1987 to 2016. Our analysis, validated against available observations, reveals that summers with weak are marked by warmer water column features saltier upper layer...
Earth and Space Science Open Archive This preprint has been submitted to is under consideration at Journal of Geophysical Research - Oceans. ESSOAr a venue for early communication or feedback before peer review. Data may be preliminary.Learn more about preprints preprintOpen AccessYou are viewing the latest version by default [v2]Estuarine Circulation, Mixing, Residence Times in Salish SeaAuthorsParkerMacCreadyiDRyan M.McCabeSamantha A.SiedleckiiDMarvinLorenziDSarah...
Earth and Space Science Open Archive This work has been accepted for publication in Journal of Geophysical Research - Oceans. Version RecordESSOAr is a venue early communication or feedback before peer review. Data may be preliminary. Learn more about preprints. preprintOpen AccessYou are viewing an older version [v1]Go to new versionEstuarine Circulation, Mixing, Residence Times the Salish SeaAuthorsParkerMacCreadyiDRyan M.McCabeSamantha A.SiedleckiiDMarvinLorenziDSarah...