Influences of the Gulf of Maine intrusion on the Massachusetts Bay spring bloom: A comparison between 1998 and 2000

Jiang, Mingshun; Zhou, Meng; Libby, Scott; Hunt, Carlton D.

doi:10.1016/j.csr.2007.06.009

Cited by 15 publications

(19 citation statements)

References 25 publications

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“…Circulation, water properties, and consequently, much of the biology of Massachusetts and Cape Cod Bays are driven by the general pattern of water flow in the Gulf of Maine (Geyer et al 1992, Jiang et al 2007a) as modified by regional and local winds. A coastal current flows southwestward along the Maine and New Hampshire coasts where it may enter Massachusetts Bay at Cape Ann, north of Boston.…”

Section: Discussionmentioning

confidence: 99%

“…The strength of the alongshore coastal current in spring time is an important factor in transport of red tide bloom forming Alexandrium fundyense populations into Massachusetts Bay (Anderson et al 2005. The interannual variation in the degree of oceanic intrusion into Massachusetts Bay also appears to be an important determinant of the magnitude of the winter-spring bloom (Jiang et al 2007a). Furthermore, the influence of an ocean basin-scale climatic driver, the North Atlantic Oscillation, has been detected in interannual variation of Massachusetts Bay zooplankton abundance .…”

Section: Introductionmentioning

confidence: 96%

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Phytoplankton Patterns in Massachusetts Bay—1992–2007

Hunt

Borkman

Libby

et al. 2008

Estuaries and Coasts

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The Massachusetts Water Resources Authority (MWRA) conducts a comprehensive multidisciplinary monitoring program in Massachusetts Bay, Cape Cod Bay, and Boston Harbor to assess the environmental effects of a relocated secondary-treated effluent outfall. Through 2007, 8.7 years of baseline data and 7.3 years of postdiversion data (16 total years), including species level estimates of phytoplankton and zooplankton abundance, have been collected. MWRA's monitoring program and other studies make this region one of the most thoroughly studied and well-described marine systems in the world. The data show that the diversion of MWRA effluent from the harbor to the bay has decreased nutrients concentrations and improved water quality in the harbor (e.g., higher dissolved oxygen, lower chlorophyll). The diversion also resulted in an increase in dissolved inorganic nutrients (especially ammonium) in the vicinity of the bay outfall, but no obvious impacts such as increased biomass or decreased bottom water dissolved oxygen have been observed. Regional changes in phytoplankton and zooplankton unrelated to the diversion have been seen, and it is clear that the bays are closely connected both physically and ecologically with the greater Gulf of Maine. Direct responses to modifications of the nutrient field within a 10×10-km area centered near the midpoint of the 2-km long outfall diffuser in Massachusetts Bay (a.k.a. the nearfield) have not been seen in the plankton community. However, plankton variability in the bays has been linked to large regional to hemispheric scale (NAO) processes.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Phytoplankton Patterns in Massachusetts Bay—1992–2007

Hunt

Borkman

Libby

et al. 2008

Estuaries and Coasts

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“…The model domain covers the entire BH (over 500km 2 ) and a part of the Massachusetts Bay (MB) with a grid resolution around 70m (Figure 1). The model was forced by surface winds and heat fluxes derived from measurements at NOAA buoy 44013 in western MB, and freshwater discharges at the USGS gauges, and boundary forcing (tides, currents, temperature and salinity) derived from the model output of the MB hydrodynamic model [21]. The model captures the general dynamic processes including tidal cycle, seasonal development of stratification, and wind-and river-driven circulation.…”

Section: Modeling Underwater Phenomenamentioning

confidence: 99%

“…We also compute a numeric covariance for the Neponset River based on data from a numerical model of the river. The model is based on readings from a few specific sensor locations and is extended to all points in the river using a physics-based hydrodynamic model [21].…”

Section: Introductionmentioning

confidence: 99%

Adaptive decentralized control of underwater sensor networks for modeling underwater phenomena

Detweiler

Doniec²,

Jiang³

et al. 2010

Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems

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Understanding the dynamics of bodies of water and their impact on the global environment requires sensing information over the full volume of water. We develop a gradientbased decentralized controller that dynamically adjusts the depth of a network of underwater sensors to optimize sensing for computing maximally detailed volumetric models. We prove that the controller converges to a local minimum. We implement the controller on an underwater sensor network capable of adjusting their depths. Through simulations and experiments, we verify the functionality and performance of the system and algorithm.

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“…Hydrology, nutrients and phytoplankton in the GOM are also subject to largescale influences (Petrie & Drinkwater 1993, Barton et al 2003, Thomas et al 2003. As a shallow embayment connected to the GOM through the intruding branch of the WMCC, MB-CCB likely is affected by climate variability indirectly through changes in the boundary conditions (Jiang et al 2007b) and directly through changes in surface forcing, such as the sea surface temperature (SST) (Keller et al 2001) and surface winds (Turner et al 2006). However, the problem becomes more complicated because signals of largescale variability propagating into coastal regions can be amplified or weakened.…”

Section: Introductionmentioning

confidence: 99%

Springtime transport and retention of Calanus finmarchicus in Massachusetts and Cape Cod Bays, USA, and implications for right whale foraging

Jiang

Brown²,

Turner³

et al. 2007

Mar. Ecol. Prog. Ser.

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The Massachusetts Bay (MB) and Cape Cod Bay (CCB) system is a unique coastal embayment, with CCB serving as a high-use feeding ground for endangered North Atlantic right whales Eubalaena glacialis during winter and early spring. We used a hydrodynamic model, observed Calanus finmarchicus (the preferred prey of right whales) abundance, and right whale sightings during 1997-2004 to examine the transport and retention of C. finmarchicus in MB-CCB and the implications for right whale activity. A particle-tracking program was embedded into the model to simulate the Lagrangian residual circulation, and the transport and retention of passive particles. The results indicate significant correlations in the inter-annual variability of coastal transport, circulation pattern, C. finmarchicus abundance, and right whale sightings in spring. In normal years (with prevailing northwesterly winds), the monthly mean distributions of particles and Lagrangian residual currents show a coherent pattern with 2 particle retention areas in central CCB and central MB, respectively. The CCB retention area closely matches the area of high probability of right whale occurrence and feeding activity, indicating that this is an area favorable to zooplankton aggregations. In other years (e.g. 2002), the coastal current is significantly reduced due to prevailing southwesterly winds, and the particle retention zone is shifted northward, coincident with low C. finmarchicus abundance and whale sightings in CCB. The study also suggests that the North Atlantic Oscillation may influence C. finmarchicus abundance and distributions, and hence, right whale feeding activity in CCB through surface winds affecting MB-CCB circulation, and hence, zooplankton distributions.

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Influences of the Gulf of Maine intrusion on the Massachusetts Bay spring bloom: A comparison between 1998 and 2000

Cited by 15 publications

References 25 publications

Phytoplankton Patterns in Massachusetts Bay—1992–2007

Phytoplankton Patterns in Massachusetts Bay—1992–2007

Adaptive decentralized control of underwater sensor networks for modeling underwater phenomena

Springtime transport and retention of Calanus finmarchicus in Massachusetts and Cape Cod Bays, USA, and implications for right whale foraging

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