Diapycnal Mixing in the Cape Ghir upwelling region

Geophysical Resea ch Abs ac s Vol. 14, EGU2012-9732-3, 2012 EGU Gene al Assembly 2012 © Au ho (s) 2012 Diapycnal Mixing in he Cape Ghi upwelling egion A. Rod íguez-San ana (1), M. Emeliano (2), V. Paka (3), S.N. Es ada-Allis (1), M. A cos-Pulido (1), M. He nández-A encibia (1), D. Ba ahona (4), B. Aguia -González (1), A. Ma e o-Díaz (1), P. De la Fuen e (2), F. Machín (1), and J.L. Peleg í (2) (1) Depa amen o de Física, Uni e sidad de Las Palmas de G an Cana ia, Las Palmas de G an Cana ia, Spain ([email p o ec ed]), (2) Ins i u o de Ciencias del Ma , CSIC, Ba celona, Spain ([email p o ec ed]), (3) Shi sho Ins i u e o Oceanology, Kalining ad, Russia ([email p o ec ed]), (4) Depa amen o de Geo ísica, Uni e sidad de Concepción, Chile, ([email p o ec ed]) One oceanog aphic su ey was ca ied ou wi hin a p ojec mul idisciplina y (PROMECA) om 18 o 29 Oc obe 2010 in he Cana y Basin. Du ing h ee days, Conduc i i y –Tempe a u e dep h (CTD), Expandable Ba hy e mog aph (XBT) and Mic os uc u e u bulence ( ee all p o ile s: u boMAP and Baklán) da a we e ob ained in se e al s a ions in he Cape Ghi upwelling egion. Also du ing he c uise, eloci y da a we e measu ed by a essel Acous ic Dopple Cu en P o ile (ADCP) wi h a e ical bin size o 8 m. The i s esul s show how he e ical dis ibu ion o he dissipa ion a e o u bulen kine ic ene gy, ε, is modi ied by he ilamen s p esen in he egion. These oceanog aphic s uc u es in ensi y he e ical shea o he low and modi y he e ical g adien s o empe a u e and salini y, hus in luencing in he sou ces o mixing p ocesses associa ed (Kel in-Helmhol z ins abili ies and double di usion). The ε alues ound ange be ween 10-7 and 10-10 W/kg in he i s 500 m o he wa e column wi h maximum alues nea he su ace o associa ed o he ilamen s. Wi h he dissipa ion a es o he mal a iance, χ, es ima ed om mic os uc u e da a, we a e applying a model based in he dissipa ion a io, a io o he di usi i ies o hea and buoyancy, o es ima e he ne u bulence di usi i ies when p ocesses o double di usion and u bulence induced by e ical shea o he low a e p esen in he same egion.