Proposed Abstract Title

Systematic Variations on Broad Time Scales As Revealed by High Resolution Oceanographic Monitoring from Cabled Observatory Sensors

Type of Presentation

Oral

Session Title

Trans-boundary monitoring in the marine evironment: Challenges and opportunities

Location

2016SSEC

Description

Ocean Networks Canada operates the VENUS and NEPTUNE observatories, with installations across the Salish Sea and off the west coast into the deep Pacific Ocean. High-resolution time series from near-bottom sensors on the coastal VENUS array in the Salish Sea reveal environmental variations on a broad range of temporal scales. With over ten years of data from Saanich Inlet, the observations clearly show the influence of processes from internal waves and tides, to inter-annual signals linked to El Nino and La Nina. Data from Saanich Inlet, a protected fjord, quantify the seasonal renewal of dense over-flow exchanges, replenishing low Oxygen hypoxia in the inlet’s basin. In the Strait of Georgia, strong tides are superimposed on seasonal and inter-annual variations in the river flow and regional forcing, including influences tied to El Nino and La Nina. The 2015 water property signals are remarkable and noticeably distinguished form previous years, strongly influenced by the encroachment of the northeast Pacific Blob. This presentation will review key functional and climate related signals in data from the VENUS cabled observatory.

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Systematic Variations on Broad Time Scales As Revealed by High Resolution Oceanographic Monitoring from Cabled Observatory Sensors

2016SSEC

Ocean Networks Canada operates the VENUS and NEPTUNE observatories, with installations across the Salish Sea and off the west coast into the deep Pacific Ocean. High-resolution time series from near-bottom sensors on the coastal VENUS array in the Salish Sea reveal environmental variations on a broad range of temporal scales. With over ten years of data from Saanich Inlet, the observations clearly show the influence of processes from internal waves and tides, to inter-annual signals linked to El Nino and La Nina. Data from Saanich Inlet, a protected fjord, quantify the seasonal renewal of dense over-flow exchanges, replenishing low Oxygen hypoxia in the inlet’s basin. In the Strait of Georgia, strong tides are superimposed on seasonal and inter-annual variations in the river flow and regional forcing, including influences tied to El Nino and La Nina. The 2015 water property signals are remarkable and noticeably distinguished form previous years, strongly influenced by the encroachment of the northeast Pacific Blob. This presentation will review key functional and climate related signals in data from the VENUS cabled observatory.