Cover of: A climatology of the Middle Atlantic Bight shelfbreak front | Christopher Anthony Linder

A climatology of the Middle Atlantic Bight shelfbreak front

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CONTINENTAL SHELVES, MARINE CLIMATOLOGY, FRONTS (OCEANOGR
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Description of the shelfbreak front in the Middle Atlantic Bight is hampered by the extreme variability of the front. In order to gain more insight into the mean frontal structure and associated baroclinic jet, historical data is used to produce two dimensional climatological fields of temperature and salinity for the region south of Nantucket shoals. Associated cross-shelf fields of density, geostrophic velocity, relative vorticity, and shallow water potential vorticity have also been computed. Historical data from a quality- controlled database (HydroBase) in the region 69-72 deg W, 39.5-41 deg N is included. Cross-shelf sections are obtained by averaging the data in nine depth bins with an average cross-shelf spacing of 10 km but an increased resolution of 4 km near the shelfbreak. The vertical averaging interval was 10 m over the shelf and upper slope waters, increasing to 50 m in the deep slope waters. The data were averaged in bimonthly periods to study seasonal trends. For inter- regional comparison, similar analyses were performed for the south flank of Georges Bank and the shelf off New Jersey. The climatological temperature and salinity are consistent with previous descriptions of the frontal hydrography. Most importantly, features such as the cold pool, the upper slope pycnostad, and the frontal boundary are well resolved when compared with synoptic sections. The temperature contrast across the front varies seasonally between 2-6 deg C near the surface and at depths of 45-65 m. The salinity contrast is 1.5-2 PSS, with little seasonal variation. The resulting cross-frontal near surface density gradients are strongest during the winter and weakest during the summer, when the seasonal thermocline is established.

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Open LibraryOL25267190M

Description A climatology of the Middle Atlantic Bight shelfbreak front PDF

Description of the shelfbreak front in the Middle Atlantic Bight is hampered by the extreme variability of the front.

In order to gain insight into both the seasonal variability and regional variations in the mean frontal structure and associated baroclinic jet, historical data are used to produce two‐dimensional climatological fields of temperature and salinity for the region south of Cited by: Climatology of the Middle Atlantic Bight Shelfbreak Front.

Published: Ft. Belvoir, Va.: Defense Technical Information Center, [between and ?] Physical Description: microfiche Additional Creators: Defense Technical Information Center (U.S.) Availability. I Want It. A bi-monthly climatology of the front based on bin-averaging by water depth appears in Linder and Gawarkiewicz (); they describe characteristics of the Shelfbreak Jet including width, vertical.

A climatology of the Middle Atlantic Bight shelfbreak front Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, Includes bibliographical references (p. A climatology of the Middle Atlantic Bight shelfbreak front.

The shelfbreak front in the Middle Atlantic Bight is the water mass boundary between the cool, fresh water of the continental shelf and the warm, saline water of the continental slope.

The front has been described in numerous studies dating back to Bigelow [] and is important in many of the commercial fisheries of the.

Abstract. Description of the shelfbreak front in the Middle Atlantic Bight is hampered by the extreme variability of the front.

In order to gain insight into both the seasonal variability and regional variations in the mean frontal structure and associated baroclinic jet, historical data are used to produce two-dimensional climatological fields of temperature and salinity for the region south. A climatology of the Middle Atlantic Bight shelfbreak front By Christopher Anthony Linder Get PDF (6 MB).

A climatology of the Middle Atlantic Bight shelfbreak. A climatology of the Middle Atlantic Bight shelfbreak front. By Christopher A. (Christopher Anthony) Linder. Get PDF (12 MB) Abstract. by Christopher Andrew (M.S.)--Massachusetts Institute of Technology, Dept.

of Ocean Engineering, Includes bibliographical references (p. 93. Middle Atlantic Bight this shelfbreak front is a highly dynamical feature that is often severely contorted by large amplitude meandering (Beardsley et al.

For parameters typical of the Middle Atlantic Bight in winter, the most unstable wave is surface-trapped with a typical e-olding growth time scale of days.

The most unstable wavelength, 25 km, is roughly 20 percent more unstable using the unbounded topography seaward of the front versus using a flat bottom seaward of the frontal region.

The behavior of the Middle Atlantic Bight shelfbreak front is examined using the high-resolution NCEP North Atlantic Ocean Forecasting system (NAOFS).

Download A climatology of the Middle Atlantic Bight shelfbreak front PDF

The strength and variability of the shelfbreak front is quantified to obtain better understanding of the characteristics of the shelfbreak front. The shelfbreak front in the Middle Atlantic Bight (MAB) is the water mass boundary between the cold freshwater on the MAB shelf and the warm saline water of the slope sea.

Associated with the front is a narrow shelfbreak jet, which has been estimated to transport approximately – Sv (1 Sv ≡ 10 6 m 3 s −1) of water equatorward south of New England (Linder and Gawarkiewicz ).

Past observations have noted a seasonal asymmetry in the exchange across the shelfbreak front in the Middle Atlantic Bight. Wright () found that shelf parcels were present on the slope over 90% of the time during the late spring and summer and were present less than 10% of the time during winter.

All of the Middle Atlantic Bight shelf water terminated by 35°30'N. Ten days later, the Gulf Stream had moved away from the shelfbreak south of Cape Hatteras and strong winds from the north were.

The shelfbreak front in the Middle Atlantic Bight (MAB) is the water mass boundary between the cold freshwateronthe MABshelf andthewarmsaline water of the slope sea. Associated with the front is a narrow shelfbreak jet, which has been estimated to transport approximately – Sv (1 Sv [.

In the Middle Atlantic Bight (MAB), a persistent shelfbreak front near the m isobath separates cooler, fresher continental shelf waters from the warmer, saltier waters of the slope sea (e.g., Wright and Parker ; Houghton et al.

; Linder and Gawarkiewicz ), which lies between the continental shelf and the Gulf Stream (Csanady and Hamilton ).

Details A climatology of the Middle Atlantic Bight shelfbreak front PDF

1. Introduction [2] Along the east coast of the U.S. from Georges Bank to Cape Hatteras (Middle Atlantic Bight) a shelf‐slope front separates relatively fresh shelf water from saltier slope water [Bigelow and Sears, ; Linder and Gawarkiewicz, ].Exchange across the shelf‐slope front is important in determining shelf water properties [Csanady and Magnell, ], the extent to which.

the front to the bathymetry throughout the Middle Atlantic Bight. The front is slightly offshor e of the m isobath at mid - depth (40 - 55 m) s i nce the foot of the front, or intersection.

Science - Middle Atlantic Bight Climatology. A fine-scale survey of physical, chemical, and optical properties was done across the shelfbreak front in the Middle Atlantic Bight region south of Martha's Vineyard, Cape Cod (°W) during.

This climatology calculates monthly averages for the entire Middle Atlantic Bight with a high resolution spatially enabling the detailed comparison for the locations of CTD profiles from There is a scale mis-match temporally, using monthly averages for the climatology, but this is the best climatological field at present.

Observations from autumn near the shelfbreak front in the Middle Atlantic Bight are used to describe the transition from stratified summer conditions to well-mixed winter conditions over the shelf.

The plan view climatology encompasses the entire Middle Atlantic Bight continental shelf and slope region from Georges Bank to Cape Hatteras (N, W, see shaded area in Figure 1). The primary data source is Hydrobase2 (Curry, ). Linder, C. A., and G.

Gawarkiewicz, A climatology of the shelfbreak front in the Middle Atlantic Bight, J. Geophys. Res., The shelfbreak front in the Middle Atlantic Bight (MAB) is the water mass boundary between the cold freshwater on the MAB shelf and the warm saline water of the slope sea.

Associated with the front is a narrow shelfbreak jet, which has been estimated to transport approximately – Sv (1 Sv [. Shelfbreak Exchange Processes in the Middle Atlantic Bight Glen Gawarkiewicz Physical Oceanography Department.

Woods Hole Oceanographic Institution. ECCWO June 8, Co-Authors on recent paper in Oceanography Magazine Special Issue on Ocean Observatories Initiative Robert Todd, Gordon Zhang, Jacob Partida- WHOI. [1] 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.

Saline intrusions from the upper slope onto the outer shelf are frequently observed at the pycnocline along the shelfbreak front in the Middle Atlantic Bight during the summer. A brief cruise was conducted in July, between Baltimore and Washington Canyons to examine along‐shelf variability of pycnocline salinity intrusions.

We will focus our study on the Middle Atlantic Bight (hereafter called MAB). Linder and Gawarkiewicz () (hereafter called LG98) produced a climatology of the shelfbreak front in the MAB for different times of the year. Later, Gawarkiewicz et al. () showed that the structure of the shelfbreak front, although very robust, was strongly.

During a 2 day period in mid-Septembermore thanunconfirmed but identifiable, sei whale (Balaenoptera borealis) calls were collected as incidental data during a multidisciplinary oceanography and acoustics experiment on the shelf off New Jersey. Using a combined vertical and horizontal acoustic receiving array, sei whale movements were tracked over long distances (up to tens of.intrusion of slope water onto the continental shelf of the mid-Atlantic bight.

Geophysical Research Letters, 23, – Linder, C., and G. Gawarkiewicz, A climatology of the shelfbreak front in the Middle Atlantic Bight. Journal of Geophysical Research, submitted. 1. Introduction. Adjacent to the Gulf Stream, the Mid-Atlantic shelfbreak front separates colder fresher shelf water from the warmer saltier slope water (Beardsley and Boicourt,Lentz, ).The foot of the front is anchored at the shelfbreak, while its .