1/24 med bathymetry and vertical levels distribution group meeting 22 december 2015 agresti delrosso...

1/24 Med Bathymetry and vertical levels distribution

Group meeting 22 December 2015

AgrestiDelrossoClementi

(towards V 0.1)

Valentina Agresti

1/24 Bathymetry

State of the art

Analysis of the BATHYMETRY CHECKPOINTS and corrections of 1/24 land-sea mask costal areas, especially: islands, straits, gulfs, lagoons, rivers delta and costal lakes;

Matching between the the land-sea mask and the bathymetry (GEBCO), interpolated on 1/24° of resolution grid, using the “seaoveland” routine;

Minimum depth set to – 5 meters.

Bathymetry data:- GEBCO (V 0a)- EMODnet (V 0b)

1/24Bathymetry

V 0.1

Bathymetry Checkpoints

V 0.1Landsea

Mask

State of the art 2/2

Comparison between the T, U and V grids;

Test vertical levels distribution;

Bathymetry data:- GEBCO (V 0a)- EMODnet (V 0b)

1/24Bathymetry

V 0.1


V 0.1Landsea

Mask

Matching between the the land-sea mask and the bathymetry (GEBCO) interpolated on 1/24° of resolution grid;

Bathymetry data: GEBCO

A. Gibraltar Strait

B. Mar Chica

C. Boughrara Gulf

D. Nile delta

E. Bonifacio Strait

F. Ambracian Gulf

G. Malian Gulf

H. Thessalonikki

I. Croatian Islands

J. Gulf of Venice

K. Messina Strait

F

BC

A

D

E

K G

H

IJ

Analysis of the BATHYMETRY CHECKPOINTS: comparing the T, U, and V grids


Analysis of the BATHYMETRY CHECKPOINTS: comparing the T, U, and V grids ARAKAWA C GRID

Matching between the the land-sea mask and GEBCO the bathymetry interpolated on 1/24° of resolution grid.

Comparing the T, U and V grids

GIBRALTAR STRAIT


MAR CHICA


BOUGHRARA GULF


NILE DELTA


BONIFACIO STRAIT


MESSINA STRAIT


AMBRACIAN GULF


MALIAN GULF


THESSALONIKKI


CROATIAN ISLAND


GULF OF VENICE

1/24 Vertical levels distribution (towards V 0.1)

Damiano Delrosso

6 different vertical levels distributions have been prepared:

Experiment name

No. levs hcr 1st T-level depth [m]

last T-level depth [m]

second-last T-level depth [m]

exp01n24 72 30 1.472 5334.648 5006.818

exp02n24 91 30 0.308 5313.555 5026.334

exp03n24 91 30 1.010 6602.963 6250.977

exp04n24 120 30 1.002 6534.993 6315.839

exp05n24 120 32 1.003 6530.764 6320.031

exp06n24 120 28 1.001 6539.597 6311.271

Two different ways to produce NEMO vertical grid are available:

1) Define: jpk

hsur

ha0

ha1

hth

hcr

Experiment name

No. levs hcr

exp01n24 72 30

exp02n24 91 30

2) Define: jpk

hth

hcr

Δzmin

hmax

The vertical location of w− and t−levels is defined as: z(k) = hsur − h0k − h1log[cosh((k − hth)hcr)]

Experiment name

No. levs hcr

exp03n24 91 30

exp04n24 120 30

exp05n24 120 32

exp06n24 120 28

LEVELS DISTRIBUTION ALONG DEPTH

BATHYMETRY MASKED FOR DEPTHS > 5500 M

LEVELS DISTRIBUTION ALONG DEPTH (ZOOM Surface-500m)

FURTHER WORK – Step 1

Move to NEMO 3.6 STABLE Post merge party (the latest stable release)


Run an idealized simulation in order to compare original NEMO 3.6 STABLE code using 1/16 and 1/24 horiz. and vert. Geometry (no MFS routines at this step):- analytical formulation- no bdy- no runoff- initial conditions (?) -> Seadatanet 1/24 are available as interpolation from 1/16 Seadatanet, but maybe we could build new I.C. at 1/24 using DIVA

- test vertical geometry at this step?


Run a realistic simulation in order to compare sys4e or V2 with NEMO 1/24.We need to produce:- weights for 1/8 ECMWF- bdy- runoff- initial conditions (?) -> Seadatanet 1/24 are available as interpolation from 1/16 Seadatanet, but maybe we could build new I.C. at 1/24 using DIVA

- test vertical geometry at this step?

1/24 med bathymetry and vertical levels distribution group meeting 22 december 2015 agresti delrosso...

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