scholarly journals Bio-optical footprints created by mesoscale eddies in the Sargasso Sea

2011 ◽  
Vol 38 (13) ◽  
pp. n/a-n/a ◽  
Author(s):  
D. A. Siegel ◽  
P. Peterson ◽  
D. J. McGillicuddy ◽  
S. Maritorena ◽  
N. B. Nelson
Keyword(s):  
Mesoscale Eddies ◽  
Sargasso Sea

scholarly journals Particle fluxes associated with mesoscale eddies in the Sargasso Sea

2008 ◽  
Vol 55 (10-13) ◽  
pp. 1426-1444 ◽  
Author(s):  
K.O. Buesseler ◽  
C. Lamborg ◽  
P. Cai ◽  
R. Escoube ◽  
R. Johnson ◽  
...  
Keyword(s):  
Mesoscale Eddies ◽  
Sargasso Sea ◽  
Particle Fluxes

scholarly journals Mesoscale eddies influence the movements of mature female white sharks in the Gulf Stream and Sargasso Sea

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Peter Gaube ◽  
Camrin D. Braun ◽  
Gareth L. Lawson ◽  
Dennis J. McGillicuddy ◽  
Alice Della Penna ◽  
...  
Keyword(s):  
Gulf Stream ◽  
Mesoscale Eddies ◽  
Mature Female ◽  
Sargasso Sea

Mesoscale eddies, satellite altimetry, and new production in the Sargasso Sea

1999 ◽  
Vol 104 (C6) ◽  
pp. 13359-13379 ◽  
Author(s):  
David A. Siegel ◽  
Dennis J. McGillicuddy ◽  
Erik A. Fields
Keyword(s):  
Satellite Altimetry ◽  
Mesoscale Eddies ◽  
Sargasso Sea ◽  
New Production

Influence of mesoscale eddies on new production in the Sargasso Sea

Nature ◽  
10.1038/28367 ◽  
1998 ◽  
Vol 394 (6690) ◽  
pp. 263-266 ◽  
Author(s):  
D. J. McGillicuddy ◽  
A. R. Robinson ◽  
D. A. Siegel ◽  
H. W. Jannasch ◽  
R. Johnson ◽  
...  
Keyword(s):  
Mesoscale Eddies ◽  
Sargasso Sea ◽  
New Production

scholarly journals Silicate:nitrate ratios of upwelled waters control the phytoplankton community sustained by mesoscale eddies in sub-tropical North Atlantic and Pacific

2010 ◽  
Vol 7 (5) ◽  
pp. 7505-7525 ◽  
Author(s):  
T. S. Bibby ◽  
C. M. Moore
Keyword(s):  
Phytoplankton Community ◽  
Biological Response ◽  
Mesoscale Eddies ◽  
Physical Nature ◽  
Euphotic Zone ◽  
Intermediate Water ◽  
Sargasso Sea ◽  
North Pacific Intermediate Water ◽  
Mode Water ◽  
Phytoplankton Communities

Abstract. Mesoscale eddies in sub-tropical gyres physically perturb the water column and can introduce macronutrients to the euphotic zone, stimulating a biological response by which phytoplankton communities can become dominated by large phytoplankton. Mesoscale eddies are therefore important in driving export in oligotrophic regions of the modern ocean. The character and magnitude of the biological response sustained by eddies are, however, variable. Here we present data from mesoscale eddies in the Sargasso Sea (Atlantic) and the waters off Hawai'i (Pacific), alongside mesoscale events that affected the Bermuda Atlantic Time Series (BATS) over the past decade. From this analysis, we suggest that the phytoplankton community structure sustained by mesoscale eddies is predetermined by the relative abundance of silicate over nitrate (Si*) in the upwelled waters. We present data that demonstrate that mode-water eddies (MWE) in the Sargasso Sea upwell locally formed waters with high Si* to the euphotic zone, and that cyclonic eddies in the Sargasso Sea introduce waters with low Si*, a signature that originated in the iron-limited Southern Ocean. We propose that this phenomenon can explain the observed abundance of large-diatom species in MWE and small prokaryotic phytoplankton in cyclonic features. In contrast to the Atlantic, cyclonic eddies in waters off Hawai'i induce North Pacific Intermediate Water (NPIW) that has high Si* and therefore also appears capable of establishing diatom populations. These observations suggest that the structure of phytoplankton communities sustained by eddies may not be directly related to the physical nature of the eddy but rather to the chemical composition of the upwelled waters. This paper links the biological production and export efficiency of mesoscale eddies to events in spatially and temporally disparate locations.

scholarly journals Variations in Synechococcus cell quotas of phosphorus, sulfur, manganese, iron, nickel, and zinc within mesoscale eddies in the Sargasso Sea

2009 ◽  
Vol 55 (2) ◽  
pp. 492-506 ◽  
Author(s):  
Benjamin S. Twining ◽  
Daliangelis Nuñez-Milland ◽  
Stefan Vogt ◽  
Rodney S. Johnson ◽  
Peter N. Sedwick
Keyword(s):  
Mesoscale Eddies ◽  
Sargasso Sea ◽  
Iron Nickel

Satellite and in situ observations of the bio-optical signatures of two mesoscale eddies in the Sargasso Sea

2008 ◽  
Vol 55 (10-13) ◽  
pp. 1218-1230 ◽  
Author(s):  
D.A. Siegel ◽  
D.B. Court ◽  
D.W. Menzies ◽  
P. Peterson ◽  
S. Maritorena ◽  
...  
Keyword(s):  
Mesoscale Eddies ◽  
Sargasso Sea ◽  
In Situ Observations

scholarly journals Silicate:nitrate ratios of upwelled waters control the phytoplankton community sustained by mesoscale eddies in sub-tropical North Atlantic and Pacific

2011 ◽  
Vol 8 (3) ◽  
pp. 657-666 ◽  
Author(s):  
T. S. Bibby ◽  
C. M. Moore
Keyword(s):  
Phytoplankton Community ◽  
Biological Response ◽  
Mesoscale Eddies ◽  
Physical Nature ◽  
Euphotic Zone ◽  
Intermediate Water ◽  
Sargasso Sea ◽  
North Pacific Intermediate Water ◽  
Mode Water ◽  
Phytoplankton Communities

Abstract. Mesoscale eddies in sub-tropical gyres physically perturb the water column and can introduce macronutrients to the euphotic zone, stimulating a biological response in which phytoplankton communities can become dominated by large phytoplankton. Mesoscale eddies may therefore be important in driving export in oligotrophic regions of the modern ocean. However, the character and magnitude of the biological response sustained by eddies is variable. Here we present data from mesoscale eddies in the Sargasso Sea (Atlantic) and the waters off Hawai'i (Pacific), alongside mesoscale events that affected the Bermuda Atlantic Time-Series Study (BATS) over the past decade. From this analysis, we suggest that the phytoplankton community structure sustained by mesoscale eddies is predetermined by the relative abundance of silicate over nitrate (Si*) in the upwelled waters. We present data that demonstrate that mode-water eddies (MWE) in the Sargasso Sea upwell locally formed waters with relatively high Si* to the euphotic zone, and that cyclonic eddies in the Sargasso Sea introduce waters with relatively low Si*, a signature that originated in the iron-limited Southern Ocean. We propose that this phenomenon can explain the observed dominance of the phytoplankton community by large-diatom species in MWE and by small prokaryotic phytoplankton in cyclonic features. In contrast to the Atlantic, North Pacific Intermediate Water (NPIW) with high Si* may influence the cyclonic eddies in waters off Hawai'i, which also appear capable of sustaining diatom populations. These observations suggest that the structure of phytoplankton communities sustained by eddies may be related to the chemical composition of the upwelled waters in addition to the physical nature of the eddy.

scholarly journals Mesoscale variations of biogeochemical properties in the Sargasso Sea

1999 ◽  
Vol 104 (C6) ◽  
pp. 13381-13394 ◽  
Author(s):  
D. J. McGillicuddy ◽  
R. Johnson ◽  
D. A. Siegel ◽  
A. F. Michaels ◽  
N. R. Bates ◽  
...  
Keyword(s):  
Sargasso Sea
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