Spatial and temporal variability of a coarse-sand anomaly on a sandy inner shelf, northeastern Gulf of Mexico

1996 ◽  
Vol 16 (3) ◽  
pp. 266-272 ◽  
Author(s):  
Peter Fleischer ◽  
William B. Sawyer ◽  
Hannelore Fiedler ◽  
Ingo H. Stender
Keyword(s):  
Gulf Of Mexico ◽  
Temporal Variability ◽  
Coarse Sand ◽  
Spatial And Temporal Variability ◽  
Inner Shelf ◽  
Northeastern Gulf Of Mexico

scholarly journals Water column oxygen dynamics within the coastal gradient in the northeastern Gulf of Mexico inner shelf

2015 ◽  
Vol 104 ◽  
pp. 104-119 ◽  
Author(s):  
Michael Santema ◽  
Allan J. Clarke ◽  
Kevin Speer, ◽  
Markus Huettel
Keyword(s):  
Gulf Of Mexico ◽  
Water Column ◽  
Inner Shelf ◽  
Northeastern Gulf Of Mexico ◽  
Oxygen Dynamics

scholarly journals Temporal variability of chlorophyll distribution in the Gulf of Mexico: bio-optical data from profiling floats

2017 ◽  
Author(s):  
Orens Pasqueron de Fommervault ◽  
Paula Perez-Brunius ◽  
Pierre Damien ◽  
Julio Sheinbaum
Keyword(s):  
Gulf Of Mexico ◽  
Mixed Layer ◽  
Temporal Variability ◽  
Mixed Layer Depth ◽  
Chlorophyll Concentration ◽  
Optical Data ◽  
Spatial And Temporal Variability ◽  
Layer Depth ◽  
In Situ Experiments ◽  
Surface Increase

Abstract. Chlorophyll concentration is a key oceanic biogeochemical variable. In the Gulf of Mexico (GOM), its distribution, which is mainly obtained from satellite surface observations and scarce in situ experiments, is still poorly understood. In 2011–2012, eight profiling floats equipped with biogeochemical sensors were deployed for the first time in the GOM and generated an unprecedented dataset that significantly increased the number of chlorophyll vertical distribution measurements in the region. The analysis of these data, once calibrated, permits us to reconsider the spatial and temporal variability of the chlorophyll concentration in the water column. At a seasonal scale, results confirm the surface signal seen by satellites, presenting maximum concentrations in winter and low values in summer. It is shown that the deepening of the mixed layer depth is the primary factor triggering the chlorophyll surface increase in winter. In the GOM, current belief is that this surface increase corresponds to a biomass increase. However, the present dataset reveals a vertically integrated content of chlorophyll which remains constant throughout the year, suggesting that the surface increase results from a vertical redistribution of subsurface chlorophyll or photoacclimation processes, rather than a net increase of primary productivity. One plausible explanation for this is the decoupling between the mixed layer depth and the deep nutrient reservoir since mixed layer depth only reaches the nitracline in sporadic events in the observations. Float measurements also provide evidence that the depth and the magnitude of the deep chlorophyll maximum is strongly controlled by the mesoscale variability, with higher chlorophyll biomass generally observed in cyclones rather than anticyclones.

Acoustic backscatter and sediment textural properties of inner shelf sands, northeastern Gulf of Mexico

1996 ◽  
Vol 16 (3) ◽  
pp. 273-278 ◽  
Author(s):  
Kenneth S. Davis ◽  
Niall C. Slowey ◽  
Ingo H. Stender ◽  
Hannelore Fiedler ◽  
William R. Bryant ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Textural Properties ◽  
Acoustic Backscatter ◽  
Inner Shelf ◽  
Northeastern Gulf Of Mexico
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