Circulation in Cross Sound, Alaska

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Continental Shelf Research Pub Date : 2025-01-18 DOI:10.1016/j.csr.2025.105409

Emily Lemagie , Christopher Paternostro , Phyllis J. Stabeno , Mark Zimmermann

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引用次数: 0

Abstract

Cross Sound is located in southeast Alaska's Alexander Archipelago and extends ∼50 km eastward from the Gulf of Alaska to Icy Strait. Between May and August 2010, ten moorings were deployed at the entrances to Cross Sound and at key internal locations within the Sound. Instruments on each mooring measured current velocity and temperature; some also measured salinity. The tidal range in this region is large (>5 m), causing high current speeds (peak speed measured at 263 cm s⁻¹), with a strong fortnightly signal. The flow predominantly follows the bathymetry westward from Icy Strait through Cross Sound and into the Gulf of Alaska. Moorings captured an estuarine exchange with outflow near the surface and inflow at depth. Earlier multi-year moorings demonstrated that synoptic variability in water properties is greater in spring and fall than over the summer season. In summer, during spring tides, the water column can mix to the bottom, delivering nutrients into the surface euphotic zone. When spring tides coincided with a strong wind event, bottom temperatures increased by > 1 °C over 3 days.

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来源期刊

Continental Shelf Research 地学-海洋学

CiteScore

4.30

自引率

4.30%

发文量

136

审稿时长

6.1 months

期刊介绍： Continental Shelf Research publishes articles dealing with the biological, chemical, geological and physical oceanography of the shallow marine environment, from coastal and estuarine waters out to the shelf break. The continental shelf is a critical environment within the land-ocean continuum, and many processes, functions and problems in the continental shelf are driven by terrestrial inputs transported through the rivers and estuaries to the coastal and continental shelf areas. Manuscripts that deal with these topics must make a clear link to the continental shelf. Examples of research areas include: Physical sedimentology and geomorphology Geochemistry of the coastal ocean (inorganic and organic) Marine environment and anthropogenic effects Interaction of physical dynamics with natural and manmade shoreline features Benthic, phytoplankton and zooplankton ecology Coastal water and sediment quality, and ecosystem health Benthic-pelagic coupling (physical and biogeochemical) Interactions between physical dynamics (waves, currents, mixing, etc.) and biogeochemical cycles Estuarine, coastal and shelf sea modelling and process studies.