Etudes et évaluation de processus océaniques par des hiérarchies ...

98 CHAPITRE 4. ETUDES DE PROCESSUS OCÉANOGRAPHIQUES
A. Wirth, B. Barnier / Ocean Modelling 12 (2006) 101–111 107
tel-00545911, version 1 - 13 Dec 2010
Fig. 3. GL case (h = 45° N): (a) south–north cut through the center of the domain and (b) horizontal cut at 1500 m
depth, temperature contour lines every DT = 5.0 · 10 4 K starting from DT = 3.1 · 10 3 K at t = 2 days after the onset
of cooling.
depth (m)
0
-100
-200
-300
-400
-500
-600
-700
0 3 6 9 12
time (h)
Fig. 4. Vertical displacement of plumes for the first 12 h: (—) fit (const. acceleration), (h) NP, () LS, (n) GL, (,) EG,
(s) NR.
of the buoyant water front is observed. In Fig. 4 this initial behavior is fitted to a constant acceleration
of g 0 = 7.72 · 10 7 m/s 2 , this corresponds to a temperature difference of DT =
g 0 /(ag) = 3.93 · 10 4 K, which is slightly less than half the maximal temperature after 1 h into
the experiment. At this early time all five experiments show almost identical behavior as rotation