scholarly journals Coastal circulation and water-column properties in the War in the Pacific National Historical Park, Guam: measurements and modeling of waves, currents, temperature, salinity, and turbidity, April-August 2012

2014 ◽  
Author(s):  
Curt D. Storlazzi ◽  
Olivia M. Cheriton ◽  
Jamie M.R. Lescinski ◽  
Joshua B. Logan
Keyword(s):  
Water Column ◽  
Coastal Circulation ◽  
The Pacific

scholarly journals Modelling the effect of boundary scavenging on Thorium and Protactinium profiles in the ocean

2009 ◽  
Vol 6 (4) ◽  
pp. 7853-7896 ◽  
Author(s):  
M. Roy-Barman
Keyword(s):  
Arctic Ocean ◽  
Water Column ◽  
Open Ocean ◽  
The Arctic ◽  
Transport Parameters ◽  
Lateral Transport ◽  
Transport Reaction ◽  
The Pacific ◽  
The Arctic Ocean ◽  
Boundary Scavenging

Abstract. The "boundary scavenging" box model is a cornerstone of our understanding of the particle-reactive radionuclide fluxes between the open ocean and the ocean margins. However, it does not describe the radionuclide profiles in the water column. Here, I present the transport-reaction equations for radionuclides transported vertically by reversible scavenging on settling particles and laterally by horizontal currents between the margin and the open ocean. Analytical solutions of these equations are compared with existing data. In the Pacific Ocean, the model produces "almost" linear 230Th profiles (as observed in the data) despite lateral transport. However, omitting lateral transport biased the 230Th based particle flux estimates by as much as 50%. 231Pa profiles are well reproduced in the whole water column of the Pacific Margin and from the surface down to 3000 m in the Pacific subtropical gyre. Enhanced bottom scavenging or inflow of 231Pa-poor equatorial water may account for the model-data discrepancy below 3000 m. The lithogenic 232Th is modelled using the same transport parameters as 230Th but a different source function. The main source of 232Th scavenged in the open Pacific is advection from the ocean margin, whereas a net flux of 230Th produced in the open Pacific is advected and scavenged at the margin, illustrating boundary exchange. In the Arctic Ocean, the model reproduces 230Th measured profiles that the uni-dimensional scavenging model or the scavenging-ventilation model failed to explain. Moreover, if lateral transport is ignored, the 230Th based particle settling speed may by underestimated by a factor 4 at the Arctic Ocean margin. The very low scavenging rate in the open Arctic Ocean combined with the enhanced scavenging at the margin accounts for the lack of high 231Pa/230Th ratio in arctic sediments.

Oxygen Utilization and Organic Carbon Remineralization in the Upper Water Column of the Pacific Ocean

2004 ◽  
Vol 60 (1) ◽  
pp. 45-52 ◽  
Author(s):  
Richard A. Feely ◽  
Christopher L. Sabine ◽  
Reiner Schlitzer ◽  
John L. Bullister ◽  
Sabine Mecking ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Organic Carbon ◽  
Water Column ◽  
Oxygen Utilization ◽  
The Pacific ◽  
Carbon Remineralization ◽  
The Pacific Ocean

scholarly journals Water column structure influences long-distance latitudinal migration patterns and habitat use of bumphead sunfish Mola alexandrini in the Pacific Ocean

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ching-Tsun Chang ◽  
Wei-Chuan Chiang ◽  
Michael K. Musyl ◽  
Brian N. Popp ◽  
Chi Hin Lam ◽  
...  
Keyword(s):  
Habitat Use ◽  
Water Column ◽  
New Caledonia ◽  
Long Distance ◽  
Okinawa Island ◽  
Migration Patterns ◽  
Vertical Movements ◽  
Near Surface ◽  
The Pacific ◽  
Utilization Patterns

AbstractSatellite-tracking of adult bumphead sunfish, Mola alexandrini, revealed long-distance latitudinal migration patterns covering thousands of kilometers. Horizontal and vertical movements of four bumphead sunfish off Taiwan were recorded with pop-up satellite archival tags in 2019–2020. Two individuals moved northward and traveled to Okinawa Island and Kyushu, Japan and two moved southwards; crossing the equator, to Papua New Guinea and New Caledonia. During daytime, bumphead sunfish descended below the thermocline and ascended to mixed layer depths (MLD) during nighttime. The N–S migrants, however, demonstrated different habitat utilization patterns. Instead of using prevailing currents, the northward movements of sunfish cohorts exhibited extensive use of mesoscale eddies. Fish in anticyclonic eddies usually occupied deeper habitats whereas those in cyclonic eddies used near-surface habitats. On northward excursions, fish spent most of their time in regions with high dissolved oxygen concentrations. Southward movement patterns were associated with major currents and thermal stratification of the water column. In highly stratified regions, fish stayed below the thermocline and frequently ascended to MLD during daytime either to warm muscles or repay oxygen debts. These results for bumphead sunfish present important insights into different habitat use patterns and the ability to undergo long-distance migrations over varying spatial-temporal scales and features.

Water column dissolution of aragonite in the Pacific Ocean

Nature ◽  
1984 ◽  
Vol 312 (5992) ◽  
pp. 321-326 ◽  
Author(s):  
Robert H. Byrne ◽  
James G. Acker ◽  
Peter R. Betzer ◽  
Richard A. Feely ◽  
Marion H. Cates
Keyword(s):  
Pacific Ocean ◽  
Water Column ◽  
The Pacific ◽  
The Pacific Ocean
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