Home Page | Help | Contact | Log In | Search | Follow us: Official ASLO 2011 ASM Twitter Feed Official ASLO 2011 ASM Facebook Page

Navigation

Ricardo Torres, R. J., Plymouth Marine Laboratory, Plymouth, United Kingdom, rito@pml.ac.uk
Carol Robinson, C. ., School of Environmental Sciences/ University of East Anglia, East Anglia, United Kingdom,
Philip Nightingale, P. ., Plymouth Marine Laboratory, Plymouth , United Kingdom,
Beatriz. Barreiro, B. ., Instituto de Investigaciones Marinas, Vigo, Spain,
Eric Desmond Barton, E. D., Instituto de Investigaciones Marinas, Vigo, Spain,
Thomas Meunier, T. ., Instituto de Investigaciones Marinas, Vigo, Spain,
Vas Kitidis, V. ., Plymouth Marine Laboratory, Plymouth, United Kingdom,
Simon Thomas, S. ., Plymouth Marine Laboratory, Plymouth, United Kingdom,
Glen Tarran, G. ., Plymouth Marine Laboratory, Plymouth, United Kingdom,
Timothy Smyth, T. ., Plymouth Marine Labortarory, Plymouth, United Kingdom,

SMALL SCALE TURBULENCE DISTRIBUTION IN THE MAURITANIAN UPWELLING: LINKS WITH BIOGEOCHEMISTRY

Coastal upwelling regions are characterised by large chemical and particle fluxes which significantly influence atmospheric chemistry and oceanic biogeochemistry. Upwelling filaments and Surface Ekman layer dynamics are the two main mechanisms for export which transport well mixed upper column water offshore. This view contrasts with measurements obtained during two SF6 tracer experiments in April-May 2009. During 40 days we sampled upper-ocean turbulence in lagrangian survey mode (15 days) and in spatial survey mode. Data from a shear microstructure (MSS90), an ADCP with high rate pinging and an autonomous fast temperature CTD profiler provides a view of high temporal and spatial heterogeneity and provide a framework within which both physical and biological micro-environments can be described. Large scale surveys with CTD, VMADCP and MVP too support the view of an energetic yet patchy upper water column. Richardson №, Turner № and Thorpe scale distributions show a large proportion of the water column to be turbulent. We will present estimates of turbulence, examples of different processes contributing to upper-ocean mixing and its significance in the upper ocean biogeochemistry during the experiment.

Session #:S28
Date: 02-16-2011
Time: 13:45

Presentation is given by student: No