FN Archimer Export Format
PT J
TI Microstructure observations of the summer-to-winter destratification at a coastal site in the Gulf of Naples
BT 
AF Kokoszka, Florian
   Conversano, Fabio
   Ludicone, Daniele
   FERRON, Bruno
   Bouruet-Aubertot, Pascale
   Mc Millan, Justine
AS 1:1;2:1;3:1;4:2;5:3;6:4;
FF 1:;2:;3:;4:;5:;6:;
C1 Stazione Zoologica Anton Dohrn, Naples, Italy
   Univ. Brest, CNRS, IFREMER, IRD, Laboratoire d’Oc´eanographie Physique et Spatiale (LOPS), IUEM, Plouzane, France
   Sorbonne Universit´e (UPMC, Univ Paris 06)-CNRS-IRD-MNHN, LOCEAN, Paris, France
   Rockland Scientific International Inc., Victoria, Canada
C2 STAZ ZOOL ANTON DOHRN, ITALY
   CNRS, FRANCE
   UNIV SORBONNE, FRANCE
   ROCKLAND SCIENTIFIC INTERNATIONAL INC., CANADA
SI BREST
SE PDG-ODE-LOPS-OH
UM LOPS
IN DOAJ
TC 0
UR https://archimer.ifremer.fr/doc/00662/77416/79078.pdf
   https://archimer.ifremer.fr/doc/00662/77416/83296.pdf
   https://archimer.ifremer.fr/doc/00662/77416/97600.pdf
LA English
DT Article
AB A dissection of the physics of the seasonal cycle of the oceanic upper layer stratification is necessary to improve climate predictions and to constrain the response of biogeochemical cycles to the climate change. Here we present a time series of vertical profiles of ε, the dissipation rate of turbulent kinetic energy, obtained from a microstructure profiler at a mid-latitude 75m-deep coastal site covering the destratification occurring during the the summer-to-winter. The main signature of the destratification is a progressive deepening of the mixed layer depth (MLD) from September to November, that finally extended to the bottom of the full water-column at the beginning of winter. By grouping the data into temporal and vertical bins we found that the statistics of ε depend upon the time of the year and the position with respect to the MLD. A seasonal increase in storminess is correlated with the increase in intermittency of the turbulence in the mixed layer. A co-location of patches of higher ε with the shear maxima of the two first baroclinic modes suggests internal waves activity plays a role in the setting the mixing intensity in the interior despite the lack of tidal forcing. The low-passed microstructure shear distribution seems to support this hypothesis despite possible signal contaminations. The actual origin of these energetic motions remains to be investigated. Overall, this study confirms that the variability of the stratification is ruled by several physical processes whose importance varies with the seasons. Predicting a change in stratification thus requires tackling the challenge of understanding and parameterising these processes. 
PY 2020
SO Authorea
PU ESSOAR
IS July 21, 2
DI 10.1002/essoar.10505074.3
ID 77416
ER

EF