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El Niño‐Related Stratification Anomalies Over the Continental Slope Off Oregon in Summer 2014 and 2015: The Potential Vorticity Advection Mechanism
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2023
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Source: Journal of Geophysical Research: Oceans, 128(6)
[PDF-9.06 MB]
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Journal Title:Journal of Geophysical Research: Oceans
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Description:Over the continental slope off Oregon at the US West Coast, at 44.6°N, vertical stratification is found to be anomalously weak in July–August of 2014 and 2015 both in a regional ocean circulation model and conductivity–temperature–depth (CTD) profile observations. To understand the responsible mechanism, we focus on the layer between the isopycnal surfaces σθ = 26.5 and 26.25 kg m −3 that is found between depths 100 and 300 m and represents material properties characteristic of the slope poleward undercurrent and shelf-slope exchange. This layer thickness, about 50 m on average, can be twice as large during the above-mentioned periods. In the 2009–2018 model analysis, this anomaly is revealed over the continental slope only in summers
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Source:Journal of Geophysical Research: Oceans, 128(6)
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ISSN:2169-9275;2169-9291;
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Rights Information:CC0 Public Domain
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Compliance:Library
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