Mixing processes and hydraulic control in a highly stratified estuary
Bibliographic record
Abstract
This thesis utilizes field data from the Fraser River Estuary, a highly stratified system located in southwestern British Columbia, Canada, to investigate the nature of mixing processes in a highly stratified environment, and to extend two-dimensional hydraulic theory to a three dimensional environment.During the late ebb, a stationary front exists at the Fraser mouth.Although densimetric Froude numbers in the vicinity of the front are supercritical in a frame of reference parallel to the local streamlines, the front itself is oriented such that the value of the Froude number is equal to the critical value of unity when taken in a frame ofreference perpendicular to the front.This observation presents a robust extension of established two-dimensional, two-layer hydraulic theory to thee dimensions, and implies similarity with trans-sonic flows, in that a Froude angle can be used to identify critical conditions in a manner similar to the Mach angle.received from the other members of my committee, John Trowbridge, Eric Adams, and Ole Madsen, and I would like to thank Jim Ledwell for chairing my defense.The Fraser River cruises would not have been possible without help from David Jay, Philip Orton and Doug Wilson.The crew of the R/ Clifford A. Barnes, Ray McQuin and Nikki Hix, was fantastic to work with.Alex Horner was a tremendous help during both cruises, particularly with the collection of the data described in Chapter 4, and its subsequent analysis.Here at WHOI, Terr Donoghue and Jim Irish provided a tremendous amount of assistance in preparation for the two cruises.The Coastal and Estuarine GFD course at Friday Harbor Labs during the summer of 1999 was a great experience and provided me with a good foundation for the research presented here.I'd like to thank Peter Rhines and Steve Monismith for setting up and running the course, and all the visitors, teaching assistants, and other students for making it such a productive summer.In particular, Jody Klymak and Derek Fong both provided great insight, ideas, and advice as I began to scratch the surface of the Fraser River data.The other students and staffhere at Woods Hole are what make it such a great place to work and study.I'd like to thank the education office staff, Marsha Bissonette, Julia Westwater, and Marcey Simon, for making the administrative side of the Joint Program such a pleasant experience.Other Joint Program students, especially the incoming class of 1998 and all of the AOPE students, have been a great resource for both science and friendship.Many thanks to Charlie Stock, Ben Reeder, Fernanda Hoefel, Joe Warren, Ben Evans, Oscar Pizarro, Jon Woodruff, and many others that have made these years in the Joint Program so worthwhile.Outside of the Joint
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".