1 / 12

Investigating Hydrothermal Heat Flux and Plume Currents at the Main Endeavour Vent Field

This dissertation proposal by Scott Veirs at the UW School of Oceanography addresses the interaction between plumes and currents over the Main Endeavour vent field in the Northeast Pacific and its impact on hydrothermal heat flux measurements. Utilizing observations, theoretical models, and experimental setups, the study aims to analyze low and high buoyancy flux fields, flow dynamics, and the characteristics of oscillating jets. Results will advance understanding of hydrographic processes and heat transfer in hydrothermal systems, contributing to oceanographic research.

nedra
Download Presentation

Investigating Hydrothermal Heat Flux and Plume Currents at the Main Endeavour Vent Field

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. O T E Submarine volcanic heat flux and hydrography: perspectives from Northeast Pacific observations, theory, and experiments Proposed dissertation for Scott Veirs in the UW School of Oceanography Approach: Central question: How do plumes and currents interact above the Main Endeavour vent field to affect the measurement of hydrothermal heat flux?

  2. LOW BUOYANCY FLUX FIELDS: C = Cirque D = Dune CB = Clam Bed Q = Quebec HIGH BUOYANCY FLUX FIELDS: SDF = Salty Dawg HRF = High Rise MEF = Main Endeavour MF = Mothra New or suspected fields Bathymetric contour interval: 100m

  3. 1995 100m CTD vents 1 km current 2000

  4. 250 200 150 100 50 2168 Upper control volume CTD “VOC” 1800 CTD “curtain” ~350 1850 1900 CTD “ribbon” 2000 2070 ~500m N&S Ridge crest 2100 ABE survey 800m long MEF Sea floor 2210 400m wide m above MEF sea floor Depth Lower control volume

  5. ~200m NE of MEF, 1995 ~1km S of MEF, 2000 depth/mab 2175/25 1900/300 2168/15 1968/215 Mean [cm/s] 1 to N 5 to SW 1 to N 5 to SSW Max [cm/s] 5 67 9 13

  6. 1800 q_adv 250 200 150 Ridge crest 2100 100 q_top q_sides 50 2200 mab Sea floor q_focused + q_diffuse + q_conduct Depth MEF heat flux calculation q ~ DqAU, Dq = qref + (qz/Sz)(S-Sref)

  7. Synthesis through “puff” models

  8. Carriage Stratified fluid Conductivity probe Current and surface waves Oscillating jet Plume distributions in stratified, oscillatory cross flow • Translate source with stepper moter • Concentration field from light sheet(s) and conductivity probe Lam and Xia, May, 2001

  9. Interconnecting observation, theory, and experiment Observations Assumptions Approaches Products Currents MEF/sources CTD Dq definition and interpolation, A integration, U extrapolation; Scaling, dimensional analysis; Advection dominates rotation q~DqAU Puff model Lab work q_top + q_sides q_adv q variance

  10. rotary above the ridge crest • rectified within the axial valley • mean flows at both levels Frequencies with dominant spectral power: Vertical coherence: 10-100m Horizontal coherence: >50km Other sources of data?

More Related