A comparison of the physics of the northern and southern shelves of the eastern Bering Sea and some implications for the ecosystem

Stabeno, Phyllis J.; Farley, Edward V.; Kachel, Nancy B.; Moore, Sue E.; Mordy, Calvin W.; Napp, Jeffrey M.; Overland, James E.; Pinchuk, Alexei I.; Sigler, Michael F.

doi:10.1016/j.dsr2.2012.02.019

Cited by 180 publications

(187 citation statements)

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“…5b). The warm surface waters transitioned into a subsurface pool of cold (< 0 • C) and more saline waters that has been attributed to brine rejection (Stabeno et al, 2012a) (Fig. 5a-b).…”

Section: Vertical Variability Along Transectsmentioning

confidence: 99%

“…On the broad eastern shelf, currents are northwestward following the topographic isobaths and the ACW, while along the "green belt", a highly productive habitat along the edge of the continental shelf, mesoscale eddy motion promotes exchange of water between the shelf and the deep basin that contributes to enhanced primary productivity (Stabeno and Van Meurs, 1999;Wang et al, 2013). The seasonal advance, retreat and extent of sea ice in the Bering Sea strongly influences the physical properties and the biological communities of the region (Sigler et al, 2010;Stabeno et al, 2012a;Goes et al, 2014). In fact, the areal extent and rate of retreat of sea ice can determine the conditions that will develop over the Bering Sea shelf in the following summer, such as the formation of the cold pool associated with the winter water over the middle shelf (Zhang et al, 2012;Stabeno et al, 2012b).…”

Section: Introductionmentioning

confidence: 99%

“…The shelf has E. J. D'Sa et al: Absorption and fluorescence properties of CDOM of the eastern Bering Sea 3227 been further divided into northern and southern regions with a demarcation at ∼ 60 • N (Stabeno et al, 2012a). Circulation on the shelf is complicated with the Alaskan Stream flowing along the Aleutian Peninsula and supplying some of its water via Aleutian passes to the Bering Slope Current (BSC), the Aleutian North Slope Current (ANSC), and the Alaskan Coastal Water (ACW) or Alaskan Coastal Current (ACC) (Fig.…”

Section: Introductionmentioning

confidence: 99%

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Absorption and fluorescence properties of chromophoric dissolved organic matter of the eastern Bering Sea in the summer with special reference to the influence of a cold pool

et al. 2014

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Abstract. The absorption and fluorescence properties of chromophoric dissolved organic matter (CDOM) are reported for the inner shelf, slope waters and outer shelf regions of the eastern Bering Sea during the summer of 2008, when a warm, thermally stratified surface mixed layer lay over a cold pool (< 2 • C) that occupied the entire middle shelf. CDOM absorption at 355 nm (a g 355) and its spectral slope (S) in conjunction with excitationemission matrix (EEM) fluorescence and parallel factor analysis (PARAFAC) revealed large variability in the characteristics of CDOM in different regions of the Bering Sea. PARAFAC analysis aided in the identification of three humic-like (components one, two and five) and two proteinlike (a tyrosine-like component three, and a tryptophanlike component four) components. In the extensive shelf region, average absorption coefficients at 355 nm (a g 355, m −1 ) and DOC concentrations (µM) were highest in the inner shelf (0.342 ± 0.11 m −1 , 92.67 ± 14.60 µM) and lower in the middle (0.226 ± 0.05 m −1 , 78.38 ± 10.64 µM) and outer (0.185 ± 0.05 m −1 , 79.24 ± 18.01 µM) shelves, respectively. DOC concentrations, however were not significantly different, suggesting CDOM sources and sinks to be uncoupled from DOC. Mean spectral slopes S were elevated in the middle shelf (24.38 ± 2.25 µm −1 ) especially in the surface waters (26.87 ± 2.39 µm −1 ) indicating high rates of photodegradation in the highly stratified surface mixed layer, which intensified northwards in the northern middle shelf likely contributing to greater light penetration and to phytoplankton blooms at deeper depths. The fluorescent humic-like components one, two, and five were most elevated in the inner shelf most likely from riverine inputs. Along the productive "green belt" in the outer shelf/slope region, absorption and fluorescence properties indicated the presence of fresh and degraded autochthonous DOM. Near the Unimak Pass region of the Aleutian Islands, low DOC and a g 355 (mean 66.99 ± 7.94 µM; 0.182 ± 0.05 m −1 ) and a high S (mean 25.95 ± 1.58 µm −1 ) suggested substantial photobleaching of the Alaska Coastal Water, but high intensities of humic-like and protein-like fluorescence suggested sources of fluorescent DOM from coastal runoff and glacier meltwaters during the summer. The spectral slope S vs. a g 355 relationship revealed terrestrial and oceanic end members along with intermediate water masses that were modeled using nonlinear regression equations that could allow water mass differentiation based on CDOM optical properties. Spectral slope S was negatively correlated (r 2 = 0.79) with apparent oxygen utilization (AOU) for waters extending from the middle shelf into the deep Bering Sea indicating increasing microbial alteration of CDOM with depth. Although our data show that the CDOM photochemical environment of the Bering Sea is complex, our current information on its optical properties will aid in better understanding of the biogeochemical role of CDOM in carbon budgets in relation to the annual sea ic...

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“…5b). The warm surface waters transitioned into a subsurface pool of cold (< 0 • C) and more saline waters that has been attributed to brine rejection (Stabeno et al, 2012a) (Fig. 5a-b).…”

Section: Vertical Variability Along Transectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Absorption and fluorescence properties of chromophoric dissolved organic matter of the eastern Bering Sea in the summer with special reference to the influence of a cold pool

et al. 2014

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“…Many seabird species in the Bering Sea are omnivorous, consuming different species of zooplankton and fishes, spatially between colonies or ecoregions, seasonally, and when self-feeding vs. provisioning chicks (Hunt et al 2002a, Paredes et al 2012, Renner et al 2012, Harding et al 2013. Abundance of these prey species can vary greatly by season, year, and region (Brodeur et al 1999, Hollowed et al 2012, Parker-Stetter et al 2013, Ressler et al 2014; for example, physical forcing from wind and winter sea ice extent over the shelf can greatly affect the distribution and abundance of fish populations in the SEBS (Hunt et al 2002b, Stabeno et al 2012a). Furthermore, changes in prey resources can have differential impacts on surface-feeding vs. diving piscivorous and planktivorous seabirds (Kitaysky & Golubova 2000, Piatt et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Temporal shifts in seabird populations and spatial coherence with prey in the southeastern Bering Sea

Suryan

Kuletz²,

Parker‐Stetter³

et al. 2016

Mar. Ecol. Prog. Ser.

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“…Variability in ice cover on the Bering Sea shelf is associated with wind-driven variability in the advection of warmer waters onto the shelf during winter (Stabeno et al, 2001), with enhanced onshelf flow when winds are predominantly from the southeast (Danielson et al, 2012a(Danielson et al, , 2012b. Model projections suggest more ice-free years in the southeast Bering Sea (Wang and Overland, 2015), while the winter cover of sea ice in the northern Bering Sea north of 60°N is not expected to decline significantly in the foreseeable future (Stabeno et al, 2012). In the Barents Sea, sea-ice variability is linked to the heat transport carried by the influx of Atlantic Water with increased heat transport leading to reduced sea ice (Anthun et al, 2012;Sandø et al, 2014).…”

Section: Expected Changes In Sea-ice Covermentioning

confidence: 99%

Advection in polar and sub-polar environments: Impacts on high latitude marine ecosystems

Hunt

Drinkwater

Arrigo

et al. 2016

Progress in Oceanography

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a b s t r a c tWe compare and contrast the ecological impacts of atmospheric and oceanic circulation patterns on polar and sub-polar marine ecosystems. Circulation patterns differ strikingly between the north and south. Meridional circulation in the north provides connections between the sub-Arctic and Arctic despite the presence of encircling continental landmasses, whereas annular circulation patterns in the south tend to isolate Antarctic surface waters from those in the north. These differences influence fundamental aspects of the polar ecosystems from the amount, thickness and duration of sea ice, to the types of organisms, and the ecology of zooplankton, fish, seabirds and marine mammals. Meridional flows in both the North Pacific and the North Atlantic oceans transport heat, nutrients, and plankton northward into the Chukchi Sea, the Barents Sea, and the seas off the west coast of Greenland. In the North Atlantic, the advected heat warms the waters of the southern Barents Sea and, with advected nutrients and plankton, supports immense biomasses of fish, seabirds and marine mammals. On the Pacific side of the Arctic, cold waters flowing northward across the northern Bering and Chukchi seas during winter and spring limit the ability of boreal fish species to take advantage of high seasonal production there. Southward flow of cold Arctic waters into sub-Arctic regions of the North Atlantic occurs mainly through Fram Strait with less through the Barents Sea and the Canadian Archipelago. In the Pacific, the transport of Arctic waters and plankton southward through Bering Strait is minimal.In the Southern Ocean, the Antarctic Circumpolar Current and its associated fronts are barriers to the southward dispersal of plankton and pelagic fishes from sub-Antarctic waters, with the consequent evolution of Antarctic zooplankton and fish species largely occurring in isolation from those to the north. The Antarctic Circumpolar Current also disperses biota throughout the Southern Ocean, and as a result, the biota tends to be similar within a given broad latitudinal band. South of the Southern Boundary of the ACC, there is a large-scale divergence that brings nutrient-rich water to the surface. This divergence, along with more localized upwelling regions and deep vertical convection in winter, generates elevated nutrient levels throughout the Antarctic at the end of austral winter. However, such elevated nutrient levels do not support elevated phytoplankton productivity through the entire Southern Ocean, as iron concentrations are rapidly removed to limiting levels by spring blooms in deep waters. However, coastal http://dx

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A comparison of the physics of the northern and southern shelves of the eastern Bering Sea and some implications for the ecosystem

Cited by 180 publications

References 48 publications

Absorption and fluorescence properties of chromophoric dissolved organic matter of the eastern Bering Sea in the summer with special reference to the influence of a cold pool

Absorption and fluorescence properties of chromophoric dissolved organic matter of the eastern Bering Sea in the summer with special reference to the influence of a cold pool

Temporal shifts in seabird populations and spatial coherence with prey in the southeastern Bering Sea

Advection in polar and sub-polar environments: Impacts on high latitude marine ecosystems

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