scholarly journals Time series of vertical flux of zooplankton fecal pellets on the continental shelf of the western Antarctic Peninsula

2012 ◽  
Vol 471 ◽  
pp. 23-36 ◽  
Author(s):  
MR Gleiber ◽  
DK Steinberg ◽  
HW Ducklow
Keyword(s):  
Time Series ◽  
Continental Shelf ◽  
Antarctic Peninsula ◽  
Vertical Flux ◽  
Western Antarctic Peninsula ◽  
Fecal Pellets

scholarly journals Spatial patterns of continental shelf faunal community structure along the Western Antarctic Peninsula

PLoS ONE ◽  
2020 ◽  
Vol 15 (10) ◽  
pp. e0239895 ◽  
Author(s):  
Alan M. Friedlander ◽  
Whitney Goodell ◽  
Pelayo Salinas-de-León ◽  
Enric Ballesteros ◽  
Eric Berkenpas ◽  
...  
Keyword(s):  
Community Structure ◽  
Continental Shelf ◽  
Spatial Patterns ◽  
Antarctic Peninsula ◽  
Western Antarctic Peninsula

Bioactive trace metal time series during Austral summer in Ryder Bay, Western Antarctic Peninsula

2017 ◽  
Vol 139 ◽  
pp. 103-119 ◽  
Author(s):  
Johann Bown ◽  
Patrick Laan ◽  
Sharyn Ossebaar ◽  
Karel Bakker ◽  
Patrick Rozema ◽  
...  
Keyword(s):  
Time Series ◽  
Trace Metal ◽  
Antarctic Peninsula ◽  
Austral Summer ◽  
Western Antarctic Peninsula

scholarly journals Productivity and linkages of the food web of the southern region of the western Antarctic Peninsula continental shelf

2014 ◽  
Vol 122 ◽  
pp. 10-29 ◽  
Author(s):  
Tosca Ballerini ◽  
Eileen E. Hofmann ◽  
David G. Ainley ◽  
Kendra Daly ◽  
Marina Marrari ◽  
...  
Keyword(s):  
Continental Shelf ◽  
Food Web ◽  
Antarctic Peninsula ◽  
Southern Region ◽  
Western Antarctic Peninsula

scholarly journals Transport of warm Upper Circumpolar Deep Water onto the western Antarctic Peninsula continental shelf

Ocean Science ◽  
2012 ◽  
Vol 8 (4) ◽  
pp. 433-442 ◽  
Author(s):  
D. G. Martinson ◽  
D. C. McKee
Keyword(s):  
Continental Shelf ◽  
Antarctic Peninsula ◽  
Deep Water ◽  
Antarctic Circumpolar Current ◽  
Western Antarctic Peninsula ◽  
Dominant Mechanism ◽  
Circumpolar Deep Water ◽  
Marguerite Bay ◽  
Circumpolar Current ◽  
The Antarctic

Abstract. Five thermistor moorings were placed on the continental shelf of the western Antarctic Peninsula (between 2007 and 2010) in an effort to identify the mechanism(s) responsible for delivering warm Upper Circumpolar Deep Water (UCDW) onto the broad continental shelf from the Antarctic Circumpolar Current (ACC) flowing over the adjacent continental slope. Historically, four mechanisms have been suggested: (1) eddies shed from the ACC, (2) flow into the cross-shelf-cutting canyons with overflow onto the nominal shelf, (3) general upwelling, and (4) episodic advective diversions of the ACC onto the shelf. The mooring array showed that for the years of deployment, the dominant mechanism is eddies; upwelling may also contribute but to an unknown extent. Mechanism 2 played no role, though the canyons have been shown previously to channel UCDW across the shelf into Marguerite Bay. Mechanism 4 played no role independently, though eddies may be advected within a greater intrusion of the background flow.

scholarly journals Particle flux on the continental shelf in the Amundsen Sea Polynya and Western Antarctic Peninsula

Elem Sci Anth ◽  
2015 ◽  
Vol 3 ◽  
Author(s):  
Hugh W. Ducklow ◽  
Stephanie E. Wilson ◽  
Anton F. Post ◽  
Sharon E. Stammerjohn ◽  
Matthew Erickson ◽  
...  
Keyword(s):  
Time Series ◽  
Antarctic Peninsula ◽  
Particle Flux ◽  
Phytoplankton Bloom ◽  
Bacterial Respiration ◽  
Polar Regions ◽  
Western Antarctic Peninsula ◽  
Amundsen Sea ◽  
Incubation Experiments ◽  
Phaeocystis Antarctica

Abstract We report results from a yearlong, moored sediment trap in the Amundsen Sea Polynya (ASP), the first such time series in this remote and productive ecosystem. Results are compared to a long-term (1992–2013) time series from the western Antarctic Peninsula (WAP). The ASP trap was deployed from December 2010 to December 2011 at 350 m depth. We observed two brief, but high flux events, peaking at 8 and 5 mmol C m−2 d−1 in January and December 2011, respectively, with a total annual capture of 315 mmol C m−2. Both peak fluxes and annual capture exceeded the comparable WAP observations. Like the overlying phytoplankton bloom observed during the cruise in the ASP (December 2010 to January 2011), particle flux was dominated by Phaeocystis antarctica, which produced phytodetrital aggregates. Particles at the start of the bloom were highly depleted in 13C, indicating their origin in the cold, CO2-rich winter waters exposed by retreating sea ice. As the bloom progressed, microscope visualization and stable isotopic composition provided evidence for an increasing contribution by zooplankton fecal material. Incubation experiments and zooplankton observations suggested that fecal pellet production likely contributed 10–40% of the total flux during the first flux event, and could be very high during episodic krill swarms. Independent estimates of export from the surface (100 m) were about 5–10 times that captured in the trap at 350 m. Estimated bacterial respiration was sufficient to account for much of the decline in the flux between 50 and 350 m, whereas zooplankton respiration was much lower. The ASP system appears to export only a small fraction of its production deeper than 350 m within the polynya region. The export efficiency was comparable to other polar regions where phytoplankton blooms were not dominated by diatoms.

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