Lectura tesi: “Implementation of A High Resolution Regional Ocean Model For Investigating Air-Sea Interaction in The Mediterranean Area"

  • Autor: Mahesh Shinde
  • Lloc: Aula 507 "Pere Pasqual", Facultat de Física.
  • Data/Hora: 1 febrer 2016/12:00

TRIBUNAL

  • President: Dr. Manuel Espino Infantes
  • Secretari: Dr. Jordi Solé i Ollé
  • Vocal: Dr. Manuel Ruiz Villareal
  • Substituts: Dr. Emilio García Ladona Dr. Josep Lluís Pelegrí Llopart

DIRECTORS/TUTORS

Dr. Jordi Isern Fontanet

Dra. Ileana Blade Mendoza (Tutora)

 

Resum:

A high resolution application using regional ocean model is developed in the Mediterranean. Since the first internal Rossby radius of deformation in the Mediterranean sea is of the order of 10-15 kms, the spatial resolution is explored to the order of ∼5 km (1/16o) with uneven 40 sigma vertical levels. The objective is to validate certain fields from the model simulations and to study air-sea interactions. The monthly mean Sea Surface Temperature (SST) climatology obtained from ten years of model forced with climatological air-sea fluxes is well captured by model configuration. Model simulated summer SST climatology shows biases of the order of 0.8-1.0 oC with observation (MedAtlas) and 1.0-1.2 oC with intercomparison. On the large scales, the surface currents generated by model captures general structures of surface circulation. The monthly mean mixed layer depth (MLD) climatology computed from model is validated with observed monthly MLD climatology and found to be overestimated by model in winter. In second experiment, model is forced with six hourly air-sea fluxes from ERA-Interim for the period 1998-2007. The monthly mean SST climatology obtained from above simulation follows climatological annual cycle with cold biases in summer season. The weak SSTs (bias of the order of 1.0 to 1.5 oC) are observed in summer. The monthly mean SST anomalies are well simulated by model except for 2006. The comparison with satellite derived SSTs reveals that model is able to capture both, the seasonal and interannual variability, although it still has a bias of the order of 1 to 1.2 oC. The model is able to reproduce signatures of intermediate water masses. Monthly mean climatology and interannual variability of MLD are quite well reproduced by model. The model is also capable to generate mesoscale eddies in the western Mediterranean although model has overestimated surface fields.