Dispersal of the Hudson River Plume in the New York Bight: Synthesis of Observational and Numerical Studies During LaTTE

Chant, Robert J.; Wilkin, John; Zhang, Weifeng; Choi, Byoung-Ju; Hunter, Eli; Castelao, Renato M.; Glenn, Scott; Jurisa, J. T.; Schofield, Oscar; Houghton, Robert W.; Kohut, Josh; Frazer, Thomas K.; Moline, Mark A.

doi:10.5670/oceanog.2008.11

Cited by 47 publications

(23 citation statements)

References 26 publications

(26 reference statements)

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“…River plumes are typically described in terms of distinct dynamical regions. The near field is the region of intense mixing close to the river mouth where dynamics are dominated by river discharge and wind is typically considered second order [Chant et al, 2008;Hetland and MacDonald, 2008;Horner-Devine et al, 2009;Nash et al, 2009;Zhang et al, 2009;Hetland, 2010;Kilcher and Nash, 2010]. The streamwise momentum balance is assumed to be between the acceleration, the pressure gradient, and the interfacial stress.…”

Section: Introductionmentioning

confidence: 99%

The role of wind in the near field and midfield of a river plume

Kakoulaki

MacDonald

Horner‐Devine

2014

Geophysical Research Letters

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The role of wind in the near‐field and midfield regions of the Merrimack River plume is quantified using observations from surface drifters released near the river mouth during ebb tide in 2009, 2010, and 2011 under a range of wind and river discharge conditions. Comparison of momentum balance terms and analysis of plume trajectories suggests that the plume is sensitive to wind direction for wind speeds >4 m s−1 in all regions of the plume, including the near field, where wind influence has typically been considered second order. Intermediate ranges (4–12 km) were more strongly influenced by the wind than the near field (0–4 km). However, the influence of the instantaneous wind diminished farther from the mouth, presumably, due to the growing importance of longer time scale process (i.e., Ekman transport). The plume was less sensitive to cross‐shore winds than alongshore winds, particularly near the river mouth, where momentum dominates.

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Section: Introductionmentioning

confidence: 99%

The role of wind in the near field and midfield of a river plume

Kakoulaki

MacDonald

Horner‐Devine

2014

Geophysical Research Letters

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“…Nevertheless, there is no publication that compares the composition and temporal variation on the fish assemblage structure in the surf zone in relation to other coastal environments, distribution of their life stages, or identification of those that are residents. Actually, most of the coastal zone is heavily human populated (Beatley et al 2002) and the surf zones hold an increasing encumbrance as the focal area of recreation and suffer pollution from nearby urban centers (Chant et al 2008). Determining the degree, to which surf-zone assemblages vary temporally, as well as the knowledge on the ichthyofauna in coastal areas and its use at any time, may serve as parameters for further observations and gathering of diagnoses about these sites.…”

Section: Introductionmentioning

confidence: 99%

The influence of seasonality on fish life stages and residence in surf zones: a case of study in a tropical region

et al. 2013

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Abstract:Resident fishes and their seasonal use of a surf zone were characterized and identified in the Jaguaribe beach, located on the Island of Itamaracá, state of Pernambuco, northeastern Brazil. Monthly towings (March 2006 to February 2007 with a beach seine net (20 m long, 1.5 m high, 5 mm mesh size) in different moon phases and periods of the day (day and night) were conducted. A total of 6,407 specimens, 35 families and 90 species were recorded. Seven species were considered as annual residents (Anchoa tricolor, Anchoviella lepidentostole, Bairdiella ronchus, Larimus breviceps, Lycengraulis grossidens, Polydactylus virginicus and Pomadasys corvinaeformis), three resident throughout the dry season (Conodon nobilis, Lile piquitinga and Menticirrhus americanus) and two resident species in the rainy period (Cathorops spixii and Nicholsina usta). Among these 12 species, concerning their life cycle, three of them (A. tricolor, C. spixii and L. piquitinga ) showed only adult individuals, while B. ronchus, M. americanus and N. usta were the only species represented exclusively by juvenile in both seasons. The surf zone of Jaguaribe beach presents a considerable ecological importance as it encompasses a great diversity of fishes, including species considered rare for this ecosystem, as well as species which are resident annually or seasonally. The distribution pattern of species found in this study shows that the ichthyofauna of the surf zone in Jaguaribe beach is rich, mainly dominated by small-sized individuals including juveniles of several species, with the presence of some species most commonly found in neighboring environments, such as seagrass beds, estuaries and reefs. As an integrated component of interconnected environments in coastal areas of Pernambuco, and owing to its function in the life cycle of coastal fishes, the surf zone of Jaguartibe beach presents an apparently common ecological pattern for tropical sandy beaches. . americanus e N. usta foram as únicas representadas exclusivamente por jovens nas duas estações. A zona de arrebentação da Praia de Jaguaribe possui considerável importância ecológica, uma vez que engloba uma grande diversidade de peixes, incluindo espécies consideradas raras para este ecossistema, bem como espécies que são residentes anual ou sazonalmente. O padrão de distribuição das espécies registradas neste estudo demonstra que a ictiofauna da zona de arrebentação da praia de Jaguaribe é rica, dominada principalmente por indivíduos de pequeno tamanho, incluindo a fase juvenil de várias espécies, com a presença de algumas encontradas comumente em ambientes adjacentes, como banco de fanerógamas, estuários e recifes. Como um componente de ambientes interconectados em áreas costeiras de Pernambuco e por sua função no ciclo de vida de peixes costeiros, a zona de arrebentação da praia de Jaguaribe apresenta um padrão ecológico aparentemente comum em praias arenosas tropicais. Palavras-chave: ictiofauna, Itamaracá, praias arenosas, peixes juvenis.

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“…Observational studies confirm that the bulge is a naturally occurring phenomenon with many rivers (Chant et al, 2008;Horner-Devine et al, 2008;Horner-Devine, 2009;Valente and da Silva, 2009;Saldías et al, 2012;Hopkins et al, 2013;Mendes et al, 2014;Pan et al, 2014;Fernández-Nóvoa et al, 2015), but an anti-cyclonic rotation inside a bulge is observed seldom (Kudela et al, 2010;Horner-Devine, 2009;Chant et al, 2008). Observations of the evolution of the bulge over a certain time period are almost non-existent, with the ex-418 E. Soosaar et al: River bulge evolution and dynamics in a non-tidal sea ception of the Niagara River plume (Horner-Devine et al, 2008) and the Tagus estuary plume (Valente and da Silva, 2009).…”

Section: Introductionmentioning

confidence: 76%

“…Coastal currents are favoured in the case of low-discharge conditions and downwelling winds, while bulge formation is favoured during high-discharge conditions and upwelling winds (Chant et al, 2008). The anti-cyclonically recirculating bulge is characteristic of the surface advective plume (Yankovsky and Chapman, 1997), being a prominent feature in rotating tank experiments and numerical simulations under ideal conditions (Avicola and Huq, 2003;Horner-Devine et al, 2006;Thomas and Linden, 2007).…”

Section: Introductionmentioning

confidence: 98%

River bulge evolution and dynamics in a non-tidal sea – Daugava River plume in the Gulf of Riga, Baltic Sea

et al. 2016

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Abstract. Satellite remote sensing imagery and numerical modelling were used for the study of river bulge evolution and dynamics in a non-tidal sea, the Gulf of Riga (GoR) in the Baltic Sea. Total suspended matter (TSM) images showed a clearly formed anti-cyclonically rotating river bulge from Daugava River discharge during the studied low wind period. In about 7-8 days the bulge grew up to 20 km in diameter, before being diluted. A high-resolution (horizontal grid step of 125 m) General Estuarine Transport Model (GETM) was used for detailed description of the development of the river plume in the southern GoR over the period when satellite images were acquired. In the model simulation, the bulge growth rate was estimated as r b ∼ t 0.5±0.04 (R 2 = 0.90). Both the model simulation and the satellite images showed that river water was mainly contained in the bulge and there were numerous intrusions at the outer perimeter of the bulge. We performed numerical sensitivity tests with actual bathymetry and measured river runoff without wind forcing (1) having an initial three-dimensional density distribution, and (2) using initially a homogeneous ambient density field. In the first case, the anti-cyclonic bulge did not develop within the course of the model simulation and the coastal current was kept offshore due to ambient densitydriven circulation. In the second case, the river plume developed steadily into an anti-cyclonically recirculating bulge, with r b ∼ t 0.28±0.01 (R 2 = 0.98), and a coastal current. Additional simulations with constant cross-shore and alongshore winds showed a significant effect of the wind in the evolution of the river bulge, even if the wind speed was moderate (3-4 m s −1 ). While previous studies conclude that the midfield bulge region is governed by a balance between centrifugal, Coriolis and pressure gradient terms, our study showed that geostrophic balance is valid for the entire mid-field of the bulge, except during the 1-1.5 rotation period at the beginning of the bulge formation. In addition, while there is discharge into the homogenous GoR in the case of a high inflow Rossby number, the river inflow might split into two jets, with strong mixing zone in-between, in the plume nearfield region.

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Dispersal of the Hudson River Plume in the New York Bight: Synthesis of Observational and Numerical Studies During LaTTE

Cited by 47 publications

References 26 publications

The role of wind in the near field and midfield of a river plume

The role of wind in the near field and midfield of a river plume

The influence of seasonality on fish life stages and residence in surf zones: a case of study in a tropical region

River bulge evolution and dynamics in a non-tidal sea – Daugava River plume in the Gulf of Riga, Baltic Sea

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