A Compilation and Description of Hydrographic Transects of the Mid-Atlantic Bight Shelf-break Front PDF Download
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Author: Vincent D. Lyne
Publisher:
ISBN:
Category : Continental shelf
Languages : en
Pages : 290
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Book Description
Author: Vincent D. Lyne
Publisher:
ISBN:
Category : Continental shelf
Languages : en
Pages : 290
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Book Description
Author: Bernard Le Méhauté
Publisher: Harvard University Press
ISBN: 9780674017399
Category : Political Science
Languages : en
Pages : 1340
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Book Description
Author: Andrew Joseph Hirzel
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
The Middle Atlantic Bight (MAB) is a highly productive ecosystem, supporting several economically important commercial fisheries. Chlorophyll enhancement at the MAB shelf-break front has been observed only intermittently, despite numerous studies that suggest persistent upwelling at the front. High resolution cross-frontal transect crossings were collected from three two-week cruises in April 2018, May 2019, and July 2019. Chapter 2 focused on applying a novel method of classifying planktonic images taken by a Video Plankton Recorder to enable processing of the large volumes of data collected with the instrument. Chapter 3 investigated cross-frontal trends by temporally averaging in both Eulerian and frontally-aligned coordinates. For April 2018, transient chlorophyll enhancement was seen at the front in individual transects and within the frontally-aligned mean transect, but not within the Eulerian mean transect. The Eulerian mean for May 2019 showed chlorophyll enhancement as a result of frontal eddies, which were further explored in chapter 4. No frontal enhancement was observed in July 2019. The frontal eddies observed in May 2019 were simulated using an idealized model, which showed that upwelling occurred within both of the frontal eddies, despite having opposite rotational directions. This result was consistent with nutrient enhancement observed within the centers of both eddies. Biological enhancement within each eddy was observed, which may have been a result of advection from source waters and/or a local response to upwelled nutrients. The influence of frontal variability and frontal eddies on nutrients and plankton at the front argues for the necessity for 3-D models to fully explain frontal behavior and its effects on biological responses.
Author: A. Robertson
Publisher: Taylor & Francis
ISBN: 9789056990336
Category : Science
Languages : en
Pages : 204
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Book Description
First Published in 2004. Routledge is an imprint of Taylor & Francis, an informa company.
Author:
Publisher:
ISBN:
Category : Electronic journals
Languages : en
Pages : 944
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Book Description
Author: Daniel Vaulot
Publisher:
ISBN:
Category : Cell cycle
Languages : en
Pages : 876
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Author:
Publisher:
ISBN:
Category : Oceanography
Languages : en
Pages : 182
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
The seasonality of various characteristics of the detached bottom boundary layer of the Middle Atlantic Bight shelfbreak front is examined using a collection of high resolution transects across the front. The analysis follows previous methodology in which accumulated temperature change along isopycnals within the front is used to infer the location of the detached layer. The seasonal mean isopycnal at which detachment occurs (approximately 26.0 kg cu.m) is fairly constant throughout the year. However, the vertical scale of the detached layer varies significantly with season, extending 60-80 m above the bottom in winter and spring, but only 20-40 m above the bottom in summer. The vertical scale is controlled by the strength and depth of the seasonal pycnocline. The observations suggest that the detached layer is capable of extending into the euphotic zone during winter and spring. INDEX TERMS: 4528 Oceanography: Physical: Fronts and jets; 4211 Oceanography: General: Benthic boundary layers; 4219 Oceanography: General: Continental shelf processes; 4279 Oceanography: General: Upwelling and convergences.
Author:
Publisher:
ISBN:
Category : Environmental engineering
Languages : en
Pages : 410
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Analysis of the Shelfbreak PRIMER data sets are described. These data sets, consisting of primarily high-resolution hydrographic surveys, show important shelfbreak processes including interaction of a slope eddy with the front, large-amplitude frontal meandering, and frontal response to wind forcing. In addition, collaborative work with acousticians on acoustic propagation across the front is also described. In general, the front is shown to contain large horizontal and vertical velocity shears, leading to large day-to-day variability. In addition to analysis of these data sets, analysis of drifter tracks near the front have also shown new perspectives on exchange across the front, and a stability analysis of the front was also performed.
