Background
Ph.D. in Physical Oceanography, University of Washington, 1987
M.S. in Marine Environmental Studies 1974, SUNY at Stony Brook, Stony Brook, New York
B.A. (cum laude) in Chemical Physics 1970, Pomona College, Claremont, California
One symptom of global climate change is an increase in the range of tides throughout most of the eastern Pacific. Sea levels are rising and storm waves are growing larger, resulting in potentially severe coastal erosion along Pacific shores—including near the mouth of the Columbia River.
David Jay is working to reinvent tidal analysis, a field of study that hasn’t been modernized since the 1920s. His research involves extracting more meaningful information from data points around the world to make better predictions about tide changes in the future. Results of the research will have wide-ranging uses for virtually anyone connected to the world’s oceans. That includes the U.S. Navy, which has approached Jay in an effort to know more about the tides in strategic locations around the world.
Closer to home, Jay is researching the effects man and nature have on salmon habitat in the Columbia River basin. As part of his interest in the Columbia, Jay and colleague Scott Wells are working to establish the Center for Columbia Basin Research at Portland State. It will be a multidisciplinary group that can advise the many state and federal agencies in Oregon and Washington on salmon and other river management issues.
Publications
Particle trapping in stratified estuaries: Consequences of mass conservation Journal Article In: Estuaries and Coasts, 30 (6), pp. 1095-1105, 2007. |
Analyses of internal solitary waves generated at the Columbia River plume front using SAR imagery Journal Article In: Journal of Geophysical Research: Oceans, 112 (C7), 2007. |
Observations at the tidal plume front of a high-volume river outflow Journal Article In: Geophysical Research Letters, 32, L11605 (11), 2005. |
Estimation of Columbia River virgin flow: 1879 to 1928 Journal Article In: Hydrological Processes, 19 (9), pp. 1807-1824, 2005. |
Salmon at river's end: the role of the estuary in the decline and recovery of Columbia River salmon Technical Report U.S. Dept. of Commerce Seattle, WA, (NMFS-NWFSC-68), 2005. |
Lateral Variability and Forcing in the Columbia River Entrance Channel submitted to Estuaries Journal Article In: submitted to Estuaries, 2004. |
Impacts of Maintenance Dredging at the Mouth of the Columbia River on Plume Salinity Technical Report U.S. Army Corps of Engineers, Portland District 2004. |
Revising the paradigm of tidal analysis - the uses of non-stationary data Journal Article In: Ocean Dynamics, 53 (3), pp. 110-125, 2003. |
Interfacial mixing in a highly stratified estuary 1. Characteristics of mixing Journal Article In: Journal of Geophysical Research, 108 (C3), pp. 3072, 2003. |
In: Journal of Geophysical Research, 108 (C3), pp. 3073, 2003. |
Courses
CE 481/581 – The Columbia River as a System
Credits: 2
Lecture: Explores the climate and hydrologic processes that shape the Columbia River basin ecosystem, and relates these processes to the basin’s management context. The geographic scope includes the watershed, the mainstem and its reservoirs, major tributaries, the tidal river below Bonneville Dam, the estuary, the Columbia plume, and coastal waters that interact with the plume.
Prerequisites: Junior standing
Recommended: CE 361 and CE 371
CE 482/582 – Introduction to Sediment Transport
Credits: 4
Lecture: Fundamentals of sediment transport in natural surface waters. Analysis of the governing equations of mass, momentum, and sediment conservation. Covers bedload and suspended material transport in riverine and estuarine waters, focusing on non-cohesive materials. Cohesive material transport will be briefly introduced. May be taken only once for credit.
Prerequisites: CE 361 and CE 362
CE 483/583 – Estuarine Circulation
Credits: 4
Lecture: Introduction to the physical processes that govern estuarine and buoyant plume circulation. These include tides, density‐driven circulation, internal tidal asymmetry and frontal propagation.
Prerequisites: CE 361 and CE 371
Recommended: CE 576
CE 489/589 – Introduction to Advanced Fluid Mechanics
Credits: 4
Lecture and Laboratory: Advanced introduction to the geophysical fluid flows, including properties of seawater; conservation of mass, energy and momentum; dimensional analysis; the Navier‐Stokes, Reynolds and turbulent kinetc energy equations; geostrophy and potential vorticity; long and short waves; and turbulence and boundary layers. May be taken only once for credit.
Prerequisites: EAS 215, Mth 256, CE 361, and CE 362