Advances in the Ocean Observing System in the Gulf of Maine: Technical capabilities and scientific results

Pettigrew, Neal R.; Fikes, C. Patrick; Beard, M. Kate

doi:10.1109/oceanssyd.2010.5603663

Cited by 5 publications

(4 citation statements)

References 6 publications

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“…Details of the buoys are given in Pettigrew et al. (2011).…”

Section: Methodsmentioning

confidence: 99%

Variability of Deep Water in Jordan Basin of the Gulf of Maine: Influence of Gulf Stream Warm Core Rings and the Nova Scotia Current

Zhang

2021

JGR Oceans

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The exchange between shelf seas and deep oceans, a central question in coastal physical oceanography (Brink, 2016), regulates how nutrients, biota, and other materials are delivered to or removed from the coastal regions. It is particularly important for the semi-enclosed Gulf of Maine (GoM), one of the most important fishing ground in the US (Pershing et al., 2015), since a major source of the nutrients to sustain the high biological productivity in GoM comes from the subsurface water on the neighboring continental slope (hereafter referred to as slope water) that intrudes into the deep GoM (Townsend et al., 1998(Townsend et al., , 2010. The intruding slope water supplies approximately 30% of the nutrients needed for the primary biological production in the GoM (Schlitz & Cohen, 1984). The slope water condition and the intrusion is subject to the influence of large-scale climate variations.

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“…Details of the buoys are given in Pettigrew et al. (2011).…”

Section: Methodsmentioning

confidence: 99%

Variability of Deep Water in Jordan Basin of the Gulf of Maine: Influence of Gulf Stream Warm Core Rings and the Nova Scotia Current

Zhang

2021

JGR Oceans

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“…Additionally, the similar values between the GoM Δ 14 C data and those from the coastal Canada (Sherwood et al, 2008) indicate a persistent input from water originating from the north and flowing southward along the continental shelf into the GoM. Recent evidence suggests that the relative contribution of SSW has been increasing in the GoM since at least the early 2000s (Pettigrew et al, 2008, 2011; Smith et al, 2012) based on instrumental current data and perhaps as far back as the 1970s based on nutrient data (Townsend & Ellis, 2010). It is therefore likely that the amount of SSW entering the GoM has changed through time.…”

Section: Discussionmentioning

confidence: 76%

“…It follows then that when SSW inflow into the GoM is decreased, slope water flow into the GoM would increase. This mechanism has been used to both explain interannual changes in SSW and slope water inflow, with increases in slope water in the summer as opposed to the winter and spring seasons explained by increase SSW input in the winter and freshwater input in the spring (Hopkins & Garfield, 1979; Smith et al, 2001), as well as an apparent recent regime shift to increased SSW influx and decreased slope water as a result of a melting Arctic (Pettigrew et al, 2008, 2011; Smith et al, 2001).…”

Section: Discussionmentioning

confidence: 99%

A 250‐Year, Decadally Resolved, Radiocarbon Time History in the Gulf of Maine Reveals a Hydrographic Regime Shift at the End of the Little Ice Age

et al. 2020

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In order to document relative changes in water mass contributions in the Gulf of Maine (GoM), we used the shell material of the long‐lived ocean quahog (Arctica islandica). A multicentury, crossdated master shell growth chronology facilitated the reconstruction of a radiocarbon Δ14C history prior to the radiocarbon bomb‐pulse of the 1950s. This reconstruction reveals a highly variable Δ14C series (mean = −56.6 ± 8.0‰ (1σ); N = 34) from CE 1685 to 1935. Δ14C values indicate a rapid shift ca. 1860 CE in source waters to the GoM. From CE 1685 to 1860, GoM waters were dominated by an admixture of Warm Slope Water primarily composed of tropical Atlantic surface waters/Gulf Stream Waters, and Scotian Shelf Water. This water regime was followed by a rapid Δ14C transition to a Labrador Slope Water endmember after CE 1860, with an apparent decrease in Scotian Shelf Water. Together, this shift is likely related to broader changes in the Arctic and the Labrador Sea, and a short‐term strengthening of the Atlantic meridional overturning circulation. Labrador Slope Water dominating GoM hydrography in the 1900s is verified by the similarities between this record and other coral‐ and shell‐derived Δ14C records influenced by waters with Labrador Sea origin. This suggests that GoM radiocarbon variability broadly reflects large‐scale ocean circulation processes in the Northwestern Atlantic. The lack of Δ14C values much below the Labrador Slope Water endmember suggests that the interior GoM gets very little to no Antarctic Intermediate Water as other studies had previously suggested.

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“…The Gulf of Maine sensor array has had a data return of approximately 90% over more than a decade of operation and provided more temporal oceanographic data than available from the previous century. The observing system has revealed marked seasonal and interannual variability of the circulation and physical properties that suggest occurrences of regime shifts in the GoM over the last decade [1], [2], [3].…”

Section: Introductionmentioning

confidence: 99%

Evaluations of a 600 kHz RDI phased array system ADCP and a wave module operating on a G2 Slocum glider

Pettigrew

Neary

Fleming

et al. 2014

2014 Oceans - St. John's

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Advances in the Ocean Observing System in the Gulf of Maine: Technical capabilities and scientific results

Cited by 5 publications

References 6 publications

Variability of Deep Water in Jordan Basin of the Gulf of Maine: Influence of Gulf Stream Warm Core Rings and the Nova Scotia Current

Variability of Deep Water in Jordan Basin of the Gulf of Maine: Influence of Gulf Stream Warm Core Rings and the Nova Scotia Current

A 250‐Year, Decadally Resolved, Radiocarbon Time History in the Gulf of Maine Reveals a Hydrographic Regime Shift at the End of the Little Ice Age

Evaluations of a 600 kHz RDI phased array system ADCP and a wave module operating on a G2 Slocum glider

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