Now showing items 1-5 of 5
Effect of glacial retreat on sub-surface sediment accumulation in Glacier Bay, Alaska: evidence from 3.5 kHz records
(School of Oceanography, University of Washington, 2008-06-19)
The sediments in three areas of Glacier Bay were analyzed using data obtained through echo sounding. Tarr Inlet, the closest to the Grand Pacific Glacier, showed rounded hummocky structures and less fine-grained sediment. The intact sedimentary layering in Geikie Inlet likely results from its greater distance from the Geikie ...
Interpreting submarine structures for glacial retreat periodicity within Muchalat Inlet in Nootka Sound
[author abstract] At the end of the last glacial maximum a tidewater glacier, as part of the larger Cordilleran Ice Sheet, filled what is now Muchalat Inlet within Nootka Sound on Vancouver Island. As the glacier retreated it left distinct marks and features on the seafloor giving evidence as to what type, and how fast this ...
Zooplankton community structure in response to turbulent flow over a sill in Nootka Sound
[author abstract] Zooplankton behaviors have been well studied, and their movement in the water column can be activated by a number of reasons. They may migrate or maintain position in preferred light levels, avoid predation or relocate in search of food sources. In this study, I focused specifically on Euphausia pacificas’ ...
The influence of water column variability and seafloor topography on multibeam bathymetric mapping
[author abstract] The purpose of this study is to identify influences of seafloor topography and variability of sound velocity properties of the water column on the accuracy of multibeam depth estimates. This study examines the multibeam sonar data from a survey of repeated observations of the underwater feature of Williamson ...
Geological structure and acoustic properties of sediments in Effingham Inlet
[author abstract] Effingham Inlet is a unique fjord landscape located in Barkley Sound of Vancouver, Canada that was uncovered by glaciers around 15 ka. In this study, multibeam echosounder bathymetric and backscatter intensity values were recorded aboard the R/V Thompson on the University of Washington Oceanography Senior ...