Home > Documents > BIOGEOCHEMICAL BUDGET THROUGH THE STRAIT...

BIOGEOCHEMICAL BUDGET THROUGH THE STRAIT...

Date post: 20-Mar-2018
Category:
Author: vunhi
View: 250 times
Download: 17 times
Share this document with a friend
Embed Size (px)
of 18 /18
BIOGEOCHEMICAL BUDGET THROUGH THE STRAIT OF GIBRALTAR, A MODELLING STUDY BIOGEOCHEMICAL BUDGET THROUGH THE STRAIT OF GIBRALTAR, A MODELLING STUDY Macías, D. (1) , , Bruno, M. (2) , Echevarría, F. (1,3) , Vázquez, A. (2) ,García, C.M. (1) (1) Biology Department. University of Cádiz (2) Applied Physics Department. University of Cádiz (3) Centro Andaluz de Ciencia y Tecnología Marinas (CACYTMAR)
Transcript
  • BIOGEOCHEMICAL BUDGET THROUGH THE STRAIT OF GIBRALTAR, A MODELLING STUDY

    BIOGEOCHEMICAL BUDGET THROUGH THE STRAIT OF GIBRALTAR, A MODELLING STUDY

    Macas, D. (1),, Bruno, M.(2) , Echevarra, F. (1,3), Vzquez, A.(2),Garca, C.M. (1)

    (1) Biology Department. University of Cdiz(2) Applied Physics Department. University of Cdiz

    (3) Centro Andaluz de Ciencia y Tecnologa Marinas (CACYTMAR)

  • AREA OF STUDY

    1/15

  • AREA OF STUDY

    1/15

  • AREA OF STUDY

    14 km250 m

    2/15

  • ALONG STRAIT CIRCULATION

    TWO LAYER FLUX OVER THE SILL

    3/15

  • ALONG STRAIT CIRCULATION

    INTERNAL WAVE GENERATION

    TIDE RISING IN THE ATLANTIC

    INTERFACIAL MIXINGBUDGETS ALTERATION 4/15

  • DIMENSION OF THE PHENOMENON

    -200

    -150

    -100

    -50

    -200

    -150

    -100

    -50

    -200

    -150

    -100

    -50

    Salinidad (p.s.u.)

    Temperatura (C)

    Clorofila (mg/m3)

    35

    35.6

    36.2

    36.8

    37.4

    38

    38.6

    1313.51414.51515.51616.517

    00.651.31.952.63.253.94.55

    a)

    b)

    c)

    HW+6 HW-4 HW-2 HW HW+2 HW+4 HW+6 HW-4 HW-2 HW HW+2 HW+4

    1 2 3 4 5 6 7 8 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37

    1 2 3 4 5 6 7 8 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37

    HW+6 HW-4 HW-2 HW HW+2 HW+4 HW+6 HW-4 HW-2 HW HW+2 HW+4

    1 2 3 4 5 6 7 8 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37

    HW+6 HW-4 HW-2 HW HW+2 HW+4 HW+6 HW-4 HW-2 HW HW+2 HW+4

    Complicate patterns on the spatio-temporal distribution of physical and biogeochemical variables

    Undetermined effect of interfacial mixing on the element budgets between Mediterranean and Atlantic basins.

    NECESITY OF APPROPIATED MODELS TO REPRESENT TIDAL FORCINGS AND MIXING EVENTS !!

    5/15

  • 6/15

    PHYSICAL MODEL

    -6 -5.8 -5.6 -5.4 -5.2 -5

    35.6

    35.8

    36

    36.2

    36.4

    Gibraltar

    Tarifa

    CeutaTanger

    Data of:* Upper layer velocity* Lower layer velocity* Upper layer thickness

    START POINT: 2 layer-2D hydrodynamical model (Izquierdo et al, 2001)

    Main problems:* Two-layered model* Hydrostatic (no w velocities)

  • THREE LAYER APPROACH

    Sigmoid fitting

    Velocity

    h1

    Dep

    th

    u1u2

    1

    2

    Velocity

    h1

    Dep

    th

    u1u2

    1

    2

    3

    u3

    h3

    The interfacial layer is the region where a steep change in the vertical velocity profile occurs (3).

    PHYSICAL MODELIMPROVEMENTS OF THE MODEL

    7/15

  • 8/15

    Interface

    Dep

    th

    Along strait distance

    W E

    Upper layer velocity

    Lower layer velocity

    Density

    h1

    Interface

    /2

    /21 m

    Nbefore

    Ndeep

    ( )( )

    25.0*)()(

    )1(0

    221

    12


Recommended