Mesozooplankton carbon requirement in the southern Adriatic Sea: vertical distribution, diel and seasonal variability, relation to particle flux

2014 ◽  
Vol 495 ◽  
pp. 91-104 ◽  
Author(s):  
R Minutoli ◽  
A Granata ◽  
C Brugnano ◽  
G Zagami ◽  
L Guglielmo
Keyword(s):  
Vertical Distribution ◽  
Seasonal Variability ◽  
Particle Flux ◽  
Adriatic Sea

Seasonal variability of particle flux in the Weddell Sea and its relation to ice cover

Nature ◽  
1988 ◽  
Vol 335 (6189) ◽  
pp. 426-428 ◽  
Author(s):  
Gerhard Fischer ◽  
Dieter Fütterer ◽  
Rainer Gersonde ◽  
Susumu Honjo ◽  
Dorinda Ostermann ◽  
...  
Keyword(s):  
Seasonal Variability ◽  
Particle Flux ◽  
Ice Cover ◽  
Weddell Sea

scholarly journals Seasonal and Vertical Variability of Currents Energy in the Sub-Mesoscale Range on the Black Sea Shelf and in Its Central Part

2021 ◽  
Vol 28 (1) ◽  
Author(s):  
O. S. Puzina ◽  
A. A. Kubryakov ◽  
A. I. Mizyuk ◽  
◽  
◽  
...  
Keyword(s):  
Vertical Distribution ◽  
Water Transport ◽  
Black Sea ◽  
Mixed Layer ◽  
Seasonal Variability ◽  
Baroclinic Instability ◽  
The Black Sea ◽  
Mesoscale Currents ◽  
Vertical Variability

Purpose. The study is aimed at investigating seasonal variability and vertical distribution of the sub-mesoscale currents energy (scales L = 1 … 10 km, T = 1 … 10 days) in the deep and shelf zones of the Black Sea. Methods and Results. The study is based on the spectral analysis of the results obtained from the NEMO model numerical calculations performed with high spatial resolution 1 km. The analysis shows that the seasonal variability of the submesoscale energy is significantly different in deep and shelf zones of the basin. At the same time, in both regions, seasonal variation of energy of the sub-mesoscale currents with scales L < 10 rm (Esp) is in good agreement with that of the density fluctuations on the same scales. In the central part of the sea, the high values of Esp are concentrated in the upper mixed layer throughout the whole year. The Esp peak is observed in winter at the depths 0–40 m, which indicates the important role of baroclinic instability induced by the inhomogeneous distribution of the mixed layer depth (MLD) in the generation of sub-mesoscale processes. At the same time, in February in the central part of the northwestern shelf, an absolute minimum of (Esp) is observed. This minimum is caused by the complete mixing and barotropization of the water column. The Esp maximum values are observed in the shelf in September – October. This is related to the intensification of the brackish water transport from the river mouths by mesoscale eddies. In the autumn period high values of Esp in the shelf and deep part of the basin are observed in the deeper layer, compare to summer months .Variability of the Esp vertical distribution coincides to the time variation of MLD. Variability of the submesoscale energy is of a pulsating character with the short-term intensifications and weakenings. Such variability is significantly related to the passing of the mesoscale fronts and the cross-shelf water transport caused by the eddies and upwellings, which lead to the increase of the baroclinic instability. Conclusions. Analysis of the seasonal and vertical variability of the submesoscale currents in the Black Sea deep and shelf zones evidences about the decisive role of the baroclinic instability triggered mainly by the heterogeneity of MLD on their dynamics.

Seasonal variability in primary production and particle flux in the northwestern Sargasso Sea: U.S. JGOFS Bermuda Atlantic time-series study

1992 ◽  
Vol 39 (7-8) ◽  
pp. 1373-1391 ◽  
Author(s):  
Steven E Lohrenz ◽  
George A Knauer ◽  
Vernon L Asper ◽  
Merritt Tuel ◽  
Anthony F Michaels ◽  
...  
Keyword(s):  
Time Series ◽  
Primary Production ◽  
Seasonal Variability ◽  
Particle Flux ◽  
Sargasso Sea ◽  
Time Series Study ◽  
Series Study

Vertical distribution of benthic foraminifera in the northern Adriatic Sea: The relation with the organic flux

1992 ◽  
Vol 19 (1-2) ◽  
pp. 131-146 ◽  
Author(s):  
F.J. Jorissen ◽  
D.M. Barmawidjaja ◽  
S. Puskaric ◽  
G.J. van der Zwaan
Keyword(s):  
Vertical Distribution ◽  
Benthic Foraminifera ◽  
Adriatic Sea ◽  
Northern Adriatic Sea ◽  
Northern Adriatic

scholarly journals Vertical distribution and aggregation patterns of krill (Crustacea: Euphausiacea) in the Bay of Biscay: interannual and seasonal variability

2019 ◽  
Vol 97 (7) ◽  
pp. 619-630 ◽  
Author(s):  
M. Peña ◽  
R. González-Quirós ◽  
I. Munuera-Fernández ◽  
F. González ◽  
S. Romero-Romero ◽  
...  
Keyword(s):  
Vertical Distribution ◽  
Vertical Migration ◽  
Seasonal Variations ◽  
Seasonal Variability ◽  
Shelf Area ◽  
Bay Of Biscay ◽  
Acoustic Data ◽  
Epipelagic Zone ◽  
Acoustic Recording ◽  
The Vertical Distribution

Studies of krill (Crustacea: Euphausiacea) in oceanic waters of the Bay of Biscay are scarce and restricted to the epipelagic zone, overlooking vertical dynamics such as diurnal vertical migration (DVM). There is a growing interest in acoustically evaluating the biomass of krill in this area, but this requires a good knowledge of its vertical dynamics and aggregation patterns. In this work we employed acoustic data and net samples from two consecutive annual surveys covering a wide off-shelf area of the Bay of Biscay (JUVENA surveys of 2013 and 2014) and four seasonal surveys covering slope and oceanic waters in the Cantabrian Sea (SCAPA surveys of 2015). Vertical dynamics of krill were analyzed in the frame of the environmental seascape. High interannual and seasonal variations in the vertical distribution and aggregation patterns (small swarms, dense aggregations, or loose layers) of krill were observed. The vertical distribution covaried with dissolved oxygen and salinity. According to our findings, the best season to acoustically evaluate krill in the Bay of Biscay is spring, with the bulk of the biomass located above 600 m depth. Moreover, extending the acoustic recording beyond the epipelagic zone is mandatory for any season.

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