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Record W3003729896

Water Mass Transport and Transformation in the Tropics and Arctic

2018· article· en· W3003729896 on OpenAlexaboutno aff
Marion Alberty

Bibliographic record

VenueeScholarship (California Digital Library) · 2018
Typearticle
Languageen
FieldEarth and Planetary Sciences
TopicOceanographic and Atmospheric Processes
Canadian institutionsnot available
FundersNational Aeronautics and Space AdministrationUniversity of California, San DiegoAgence Nationale de la RechercheNational Science Foundation
KeywordsThermoclineWater massOceanographyClimatologyArgoOcean general circulation modelGeologyGeostrophic windThermohaline circulationOcean observationsOcean gyreOcean currentSubtropicsClimate changeGeneral Circulation Model
DOInot available

Abstract

fetched live from OpenAlex

This dissertation investigates the mechanisms which modulate the transport and transformation of water masses using observational techniques. Observations were made in the Solomon Sea during the Southwest Pacific Ocean Circulation and Climate Experiment (SPICE) (Chapters 2 & 3) and in the Canada Basin during the ArcticMix and Stratified Ocean Dynamics of the Arctic (SODA) experiments (Chapter 4).The Solomon Sea connects the subtropical and equatorial Pacific, transporting water masses that supply the equatorial undercurrent and support eastern equatorial primary productivity. Chapter 2 investigates the spatial patterns of vertical diffusiv- ity and dissipation of kinetic energy in the Solomon Sea, indirectly estimated from shipboard and Argo observations. Across the Solomon Sea, dissipation is strong rel- ative to global estimates over the same latitudinal band and decreases by 2-3 orders of magnitude from the surface to 2000 m depth. Mixing along intermediate and deep isopycnals is indicative of tidally driven mixing. The sources of energy for thermocline mixing are temporally and spatially variable and observations do not resolve a clear relationship at this time.Chapter 3 details the first, full-depth mooring transport time series from all three exit passages of the Solomon Sea: Vitiaz Strait, St. Georges Channel, and Solomon Strait. Vitiaz Strait is confirmed to supply the majority of transport (53%) toward the equator and is relatively steady in time. Transport through Solomon Strait supplies 34% of the total mean transport but dominates the total transport temporal variability. Thermocline transport variability in Solomon Strait is well described by the arrivals of the off-equatorial Rossby waves. St. Georges channel, which is typically not resolved in global and regional models due to the narrow channel width, supports 13% of total transport and seasonally exchanges water between the Bismarck Sea and Solomon Sea.The Canada Basin has experienced greater than predicted losses in summer sea ice extent and the responsible dynamics are still an active area of research. Chapter 4 studies the influence of submesoscale dynamics on the transport of heat in the Canada Basin summer mixed layer using novel observations of mixed layer temperature and salinity from a bow chain. Simultaneous microstructure observations find asymmetric mixing across surface fronts. Horizontal wavenumber spectra from in-situ and satellite observations are used to infer upper ocean dynamics and evaluate satellite sea surface temperature products.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: Observational
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.071
Threshold uncertainty score0.395

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.003
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

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.

Opus teacher head0.008
GPT teacher head0.174
Teacher spread0.166 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one teacher head, not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designObservational
Domainnot available
GenreEmpirical

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".

Quick stats

Citations1
Published2018
Admission routes1
Has abstractyes

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