CAMPAGNE ASCADE简洁的级联

1、preliminary results of the cascade cruise (gulf of lions)r/v latalante, 01 - 23 march 2011cefrem, icm-csic, ub, upm, ifremer, la, hcmr, lov, lmgem, lomic, ua cascade: cascading, storm, convection, advection and downwelling eventscascading : down-slope cascade of dense water formed along the coastwin

2、d-driven mixing and cooling of the upper layer of the ocean during winteropen-sea convection : deepening of the mixed layer thickness in the open ocean situation for the gulf of lionsmarinquantification of the export of dissolved and particulate organic and inorganic matter, as well as microorganism

3、s (free and attached bacteria, phytoplankton) = validation of coupled modelsopen-sea convection event02 feb - chlorophylle05 mar - chlorophylleradiale lradiale mdifference phases of open-sea convectionpreconditionninggeneral circulation and winds combine to predispose some part of a gyre to locally

4、overturnmixingheat loss associated with the wind exceed some critical level and initiates convectionsinkingsinking and restratification of the water column, once the surface forcing declinespreadingdispersion of newly formed deep mixed water transfer and sequestration of organic matter in the deep b

5、asin response of deep ecosystemsafter helen johns (/helen/oodc.html)hints of pelagic ecosystem response to convectionbursts of deep (near-bottom) bio-luminescence measured by photomultiplier following convection eventsboth mechanical stimulation (current-induced) and spontaneous

6、stimulation (bacterial growth due to nutrients inputs from surface and sediment)1031021013.313.2403010020jan 2008jul 2008jan 2009jul 2009jan 201013.113.012.9104pot. temperature (deg. c)current speed (cm/s)number of photon per secondsjul 2010after tamburini et al ( submitted to science)depth (m)poten

7、tial temperature (c)chlorophylle (g/l)0500100015002000250012.9013.2500.154 march8 marchsinking and spreadingrapid shift from a convective (homogenized) to a stratified regime within few dayslevantine intermediate waterold deep watermixed layer depthnew deep watercapping of newly formed deep water by

8、 levantine intermediate water export of dissolved and particulate, organic and inorganic matter and bacterial activity (preserving in situ hyperbaric conditions) during and outside convective periods in old and new deep waters10 march - turbidity18 march - turbiditystorm, downwelling and cascading e

9、vent(cm/s)suspended sediment concentration (mg/l)simulation of bottom currents for march 13, 2011(peak of the 1st storm) monitoring of the storm in the cap de creus canyonmoorings ctd station and transect 2 days of fixed ctd yoyo-ing during the stormtransect after the stormcontinuous recording with

10、mooringscurrent, turbidity, and particle fluxesadcp echo amplitude (count)adcp current speed (cm/s)1st storm2nd stormsediment traps samples (36h interval)large current (up to 90 cm/s), turbidity(up to 25 mg/l), and particles fluxesexport of dissolved and particulate organic and inorganic matter, as well as microorganisms (free and attached bacteria, phytoplankton) on water, trap samples, and sedimentsignature of dense water plumeturbiditytemperaturesalinityoxygenetransect performed after the 1st storm (march 14, 2011