Summertime thermocline salinity maximum intrusions in the Mid-Atlantic Bight

Flagg, Charles N.; Houghton, Robert W.; Pietrafesa, L. J.

doi:10.1016/0967-0645(94)90026-4

Cited by 33 publications

(30 citation statements)

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“…No drifters examined here and only a few of the total EPA-DWDS drifter set crossed the 100-m isobath (Berger et al 1996;Dragos et al 1996). Yet, many fish larvae cross from the slope onto the NEUSCS, which indicates that the physical mechanisms of cross-frontal exchange predominantly operate below 10 to 15 m. Cowen et al (1993) proposed that on-shelf movement of some species occurred via an ontogenetic deepening of larval vertical distributions coupled with slopewater intrusions along the summertime NEUSCS thermocline (Flagg et al 1994). For species that cross onto the NEUSCS at the surface (e.g., bluefish, P. sal-tatrix; white hake, Urophycis tenuis), Hare and Cowen (1996) and Hare et al (2001) proposed active horizontal swimming as the mechanism.…”

Section: Discussionmentioning

confidence: 99%

Routes and rates of larval fish transport from the southeast to the northeast United States continental shelf

Hare

Churchill

Cowen

et al. 2002

Limnology & Oceanography

104

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Larval fish originating south of Cape Hatteras, North Carolina, are frequently found on the continental shelf north of Cape Hatteras, even as far north as the Scotian shelf. The Gulf Stream and associated warm-core rings are hypothesized as the physical mechanisms responsible for the northward transport of larvae. Specifically, larvae spawned along the southeast U.S. continental shelf are entrained into the Gulf Stream, transported to the northeast, regularly incorporated in warm-core ring streamers, transported across the slope region, and released along the shelf edge north of Cape Hatteras. This proposed transport route was evaluated using hydrographic data and drifter tracks that were collected as part of other studies. Continental shelf water that originated south of Cape Hatteras was found AcknowledgmentsPatricia Tester, Cecily Natunewicz, and David Chapman provided critical reviews of earlier drafts of this manuscript.

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Section: Discussionmentioning

confidence: 99%

Routes and rates of larval fish transport from the southeast to the northeast United States continental shelf

Hare

Churchill

Cowen

et al. 2002

Limnology & Oceanography

104

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“…Associated with the warm core ring were saline intrusions which were concentrated at approximately 20 m depth, near the depth of peak stratification found over the continental shelf, consistent with the prior results of Lentz (2003). These intrusions have been identified as a common summer shelf-slope exchange process (e.g., Boicourt and Hacker, 1976;Gordon and Aikman, 1981;Aikman, 1984;Burrage and Garvine, 1988;Gawarkiewicz et al, 1990;Flagg et al, 1994;Churchill et al, 2003). The along-shelf scale of the saline intrusions was $20 km and the intrusions were associated with weakened peak stratifications relative to the mean stratification over the continental shelf.…”

Section: Large Scale Oceanographic Setting and Variabilitymentioning

confidence: 99%

On whether azimuthal isotropy and alongshelf translational invariance are present in low-frequency acoustic propagation along the New Jersey shelfbreak

Lynch

Emerson

Abbot

et al. 2012

The Journal of the Acoustical Society of America

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To understand the issues associated with the presence (or lack) of azimuthal isotropy and horizontal (along isobath) invariance of low-frequency (center frequencies of 600 Hz and 900 Hz) acoustic propagation in a shelfbreak environment, a series of experiments were conducted under the Autonomous Wide-Aperture Cluster for Surveillance component of the Shallow Water 2006 experiment. Transmission loss data reported here were from two mobile acoustic sources executing (nearly) circular tracks transmitting to sonobuoy receivers in the circle centers, and from one 12.5 km alongshelf acoustic track. The circle radii were 7.5 km. Data are from September 8, 2006. Details of the acoustic and environmental measurements are presented. Simple analytic and computer models are used to assess the variability expected due to the ocean and seabed conditions encountered. A comparison of model results and data is made, which shows preliminary consistency between the data and the models, but also points towards further work that should be undertaken specifically in enlarging the range and frequency parameter space, and in looking at integrated transmission loss.

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“…Mar Ecol Prog Ser 375: [65][66][67][68][69][70][71] 2009 Chesapeake Bay tributaries), and local wind forcing, including upwelling and hurricanes (Bumpus 1973, Beardsley et al 1976, Churchill & Cornillon 1991, Flagg et al 1994. Several species of soniferous fishes spawn in these coastal waters, including weakfish Cynoscion regalis, spot Leiostomus xanthurus, Atlantic croaker Micropogonias undulatus, black drum Pogonias cromis, striped cusk-eel Ophidion marginatum, and striped and northern searobins Prionouts evolans and P. carolinas (Able & Hagan 1995, Martino & Able 2003.…”

Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

Short-term upwelling events modulate fish sound production at a mid-Atlantic Ocean observatory

Mann¹,

Grothues²

2009

Mar. Ecol. Prog. Ser.

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Understanding factors controlling the distribution and reproduction of fishes is crucial for developing ecosystem models of fish populations. Yet, these observations are difficult to make on the same time and space scales as physical forcing events. A hydrophone was used to record fish sound production associated with reproduction at the LEO-15 ocean observatory to determine the relationship between variation in fish calling behavior and oceanographic variation. Sound production was dominated by Atlantic croaker Micropogonias undulatus, weakfish Cynoscion regalis, and striped cusk-eel Ophidion marginatum. Striped cusk-eels called with a crepuscular pattern, with a strong peak at dusk, less sound production during the night, and a lesser peak in sound production at dawn. Sciaenids called mostly at dusk and night. Nine advection events bringing colder waters to the LEO-15 site were correlated with greatly reduced levels of sound production in Atlantic croaker and weakfish on daily time scales. Our results show how ocean observatories with passive acoustics can study tightly coupled physical oceanographic influences on fish behavior on daily time scales.KEY WORDS: Sciaenid · Cusk-eel · Passive acoustics · Ocean observatory Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 375: [65][66][67][68][69][70][71] 2009 Chesapeake Bay tributaries), and local wind forcing, including upwelling and hurricanes (Bumpus 1973, Beardsley et al. 1976, Churchill & Cornillon 1991, Flagg et al. 1994. Several species of soniferous fishes spawn in these coastal waters, including weakfish Cynoscion regalis, spot Leiostomus xanthurus, Atlantic croaker Micropogonias undulatus, black drum Pogonias cromis, striped cusk-eel Ophidion marginatum, and striped and northern searobins Prionouts evolans and P. carolinas (Able & Hagan 1995, Martino & Able 2003. Spot and Atlantic croaker are at the northern end of their range off New Jersey, and local spawning and recruitment appear to fluctuate dramatically in response to temperature (Grothues & Able 2003, Hare & Able 2007. LEO-15 offers the opportunity to collect simultaneous oceanographic data and passive acoustics data to explore environmental correlates of variability in fish sound production.We deployed a hydrophone at the LEO-15 to explore fish sound patterns on event to long-term time scales. The goals were to determine the timing of soniferous fish sound production at the coastal ocean study site and perform time-series analysis of sound production data and oceanographic data to determine how physical parameters may influence daily and seasonal patterns of sound production. We show that short-term upwelling events, on the order of days, are tightly correlated with variability in fish sound production. MATERIALS AND METHODSStudy site and data acquisition. LEO-15 is a submarine electro-optical telecommunications platform with a node (Node B) located at the 20 m isobath of Beach Haven Ridge, a shoreface sand ridge 9.6 km off the coast of s...

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Summertime thermocline salinity maximum intrusions in the Mid-Atlantic Bight

Cited by 33 publications

References 9 publications

Routes and rates of larval fish transport from the southeast to the northeast United States continental shelf

Routes and rates of larval fish transport from the southeast to the northeast United States continental shelf

On whether azimuthal isotropy and alongshelf translational invariance are present in low-frequency acoustic propagation along the New Jersey shelfbreak

Short-term upwelling events modulate fish sound production at a mid-Atlantic Ocean observatory

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