A model for tidally driven eccentric instabilities in fluid disks

1991 ◽  
Vol 381 ◽  
pp. 259 ◽  
Author(s):  
Stephen H. Lubow
Keyword(s):  
Fluid Disks ◽  
Tidally Driven

Channel head dynamics: capelin (Mallotus villosus) aggregation in the tidally driven upwelling system of the Saguenay - St. Lawrence Marine Park's whale feeding ground

2002 ◽  
Vol 59 (2) ◽  
pp. 197-210 ◽  
Author(s):  
Yvan Simard ◽  
Diane Lavoie ◽  
François J Saucier
Keyword(s):  
Circulation Model ◽  
Feeding Strategies ◽  
Total Biomass ◽  
Balaenoptera Acutorostrata ◽  
Mallotus Villosus ◽  
Tidal Dynamics ◽  
Lawrence Estuary ◽  
Fin Whale ◽  
Capelin Mallotus Villosus ◽  
Tidally Driven

Capelin (Mallotus villosus) tridimensional distribution at the head of the Laurentian Channel in the St. Lawrence estuary was investigated using 38- and 120-kHz acoustic surveys in the summers of 1994, 1995, 1997, and 1998. The results are interpreted with the help of a high-resolution tridimensional tidal circulation model. Total biomasses were small (93–4583 t) and showed rapid fluctuations, whereas mesoscale distribution was more constant. Capelin tended to occupy the very end of the channel head, especially the slopes and shallows surrounding the basins. This pattern did not coincide with the krill distribution, but the two total biomass series were significantly correlated. Capelin tidal dynamics is characterized by herding of capelin against the channel head slopes by the starting flooding currents, followed by an upwelling over the sills and shallows during maximum flood currents, and a return to the channel by the surface outflow during ebb. Each side of the channel head has a distinct capelin retention tidal cycle involving passive advection, swimming, and the two-layer estuarine circulation. This capelin distribution and tidal dynamics closely match the local fin whale (Balaenoptera physalus) and minke whale (Balaenoptera acutorostrata) distributions observed from the whale-watching fleet and typical tidal feeding strategies at the channel head.

scholarly journals Tidally-driven interannual variation in extreme sea level probabilities in the Gulf of Maine

2020 ◽  
Author(s):  
Hannah Baranes ◽  
Jonathan Woodruff ◽  
Stefan Talke ◽  
Robert Kopp ◽  
Richard Ray ◽  
...  
Keyword(s):  
Sea Level ◽  
Interannual Variation ◽  
Gulf Of Maine ◽  
Tidally Driven

Tidally Driven Dispersion of a Deep-Sea Sediment Plume Originating from Seafloor Disturbance in the DISCOL Area (SE-Pacific Ocean)

Geosciences ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 8
Author(s):  
Matthias Baeye ◽  
Kaveh Purkiani ◽  
Henko de de Stigter ◽  
Benjamin Gillard ◽  
Michael Fettweis ◽  
...  
Keyword(s):  
Optical Sensors ◽  
Fine Particles ◽  
Transport Model ◽  
Manganese Nodule ◽  
Background Concentration ◽  
Plume Dispersion ◽  
Suspended Particulate Matter Concentration ◽  
Deep Sea Sediment ◽  
Suspended Particulate ◽  
Tidally Driven

The purpose of the study was to measure in situ the background suspended particulate matter concentration (SPMC) in the DISCOL area (SE Pacific) and its increase due to mechanical mobilization of the seabed. The disturbance experiment imitated future manganese nodule exploitations and was designed to measure the sediment plume generated by such activities. In the direct vicinity of the disturbance, landers equipped with acoustic and optical sensors measured the current velocities and the SPMC. The SPMC at the disturbance was easily up to 10 mg/L and thus about 200 times higher than the background concentration. The downstream sediment plume, measured by the lander, had a SPMC of about 1 mg/L. After tide reversal, the sediment plume was recorded a second time. A sediment transport model reproduced the plume dispersion. After rapid settling of the coarser fraction, a plume of hardly settling fine particles remained in suspension (and no deposition–resuspension cycles). The transport was controlled by the tides and by the vertical velocity component that resulted from bathymetrical differences. The plume may continue to disperse up to 100+ days (up to hundreds of km) depending on the particle size and until background concentration is reached.

Estimating tidally driven mixing in the deep ocean

2002 ◽  
Vol 29 (23) ◽  
pp. 21-1-21-4 ◽  
Author(s):  
L. C. St. Laurent ◽  
H. L. Simmons ◽  
S. R. Jayne
Keyword(s):  
Deep Ocean ◽  
Tidally Driven

scholarly journals Kū Hou Kuapā: Cultural Restoration Improves Water Budget and Water Quality Dynamics in Heʻeia Fishpond

2018 ◽  
Author(s):  
Paula Mohlenkamp ◽  
Charles Kaiaka Beebe ◽  
Margaret A. McManus ◽  
Angela Hiʻilei Kawelo ◽  
Keliʻiahonui Kotubetey ◽  
...  
Keyword(s):  
Water Quality ◽  
Exchange Rates ◽  
Positive Impact ◽  
Discharge Rate ◽  
Quality Parameters ◽  
Stream Discharge ◽  
Bacterial Indicator ◽  
Average Abundance ◽  
Tidally Driven ◽  
The Impact

In Hawaiʻi, the transition from customary subsistence flooded taro agroecosystems, which regulate stream discharge rate trapping sediment and nutrients, to a plantation-style economy (c. the 1840s) led to nearshore sediment deposition - smothering coral reefs and destroying adjacent coastal fisheries and customary fishpond mariculture. To mitigate sediment transport, Rhizophora mangle was introduced in estuaries across Hawai’i (c. 1902) further altering fishpond ecosystems. Here, we examine the impact of cultural restoration between 2012-2018 at Heʻeia Fishpond, a 600-800-year-old walled fishpond. Fishpond water quality was assessed by calculating water exchange rates, residence times, salinity distribution, and abundance of microbial indicators prior to and after restoration. We hypothesized that R. mangle removal and concomitant reconstruction of sluice gates would increase mixing and decrease bacterial indicator abundance in the fishpond. We find that Heʻeia Fishpond’s physical environment is primarily tidally driven; wind forcing and river flux are secondary drivers. Post-restoration, two gates in the northeastern region account for >80% of relative flux in the fishpond. Increase in exchange rates during spring and neap tide and shorter minimum water residence time corresponded with the reconstruction of a partially obstructed 56 m gap together with the installation of an additional sluice gate in the fishpond wall. Lower mean salinities post-restoration suggests increased freshwater influx due to R. mangle removal. Spatial distribution of microbial bio-indicator species inversely correlated with salinity. Average abundance of Enterococcus and Bacteroidales did not significantly change after restoration efforts, however, average abundance of a biomarker specific to birds nesting in the mangroves decreased significantly after restoration. This study demonstrates the positive impact of biocultural restoration regimes on water flushing and water quality parameters, encouraging the prospect of revitalizing this and other culturally and economically significant sites for sustainable aquaculture in the future.

Constraints on Europa’s rotational dynamics from modeling of tidally-driven fractures

Icarus ◽  
2010 ◽  
Vol 210 (2) ◽  
pp. 770-784 ◽  
Author(s):  
Alyssa Rose Rhoden ◽  
Burkhard Militzer ◽  
Eric M. Huff ◽  
Terry A. Hurford ◽  
Michael Manga ◽  
...  
Keyword(s):  
Rotational Dynamics ◽  
Tidally Driven

Tidally driven mixing in a numerical model of the ocean general circulation

2004 ◽  
Vol 6 (3-4) ◽  
pp. 245-263 ◽  
Author(s):  
Harper L. Simmons ◽  
Steven R. Jayne ◽  
Louis C.St. Laurent ◽  
Andrew J. Weaver
Keyword(s):  
Numerical Model ◽  
General Circulation ◽  
Ocean General Circulation ◽  
Tidally Driven

Seasonal and Tidally Driven Reproductive Patterns in the Saltmarsh Topminnow, Fundulus jenkinsi

Copeia ◽  
2012 ◽  
Vol 2012 (3) ◽  
pp. 451-459 ◽  
Author(s):  
Erik T. Lang ◽  
Nancy J. Brown-Peterson ◽  
Mark S. Peterson ◽  
William T. Slack
Keyword(s):  
Reproductive Patterns ◽  
Tidally Driven ◽  
Fundulus Jenkinsi
Sign in / Sign up

Export Citation Format

Share Document