Banca de DEFESA: LEONARDO BRITO PIRES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : LEONARDO BRITO PIRES
DATA : 26/02/2021
HORA: 14:00
LOCAL: Instituto de Geociências
TÍTULO:

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PALAVRAS-CHAVES:

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PÁGINAS: 77
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Oceanografia
SUBÁREA: Oceanografia Física
RESUMO:

The assimilation of SWOT altimetry data will play a key role in the understanding of ocean energy and mesoscale processes. In the present work, Observing System Simulation Experiments (OSSEs) were performed with the Hybrid Coordinate Ocean Model + Oceanographic Network Data Assimilation System (HYCOM+RODAS) with 1/24◦ of horizontal resolution and 21 vertical layers. The synthetic data of SST, SSH to nadir and SSH type SWOT were obtained from a free run using ROMS. The objective of the work is to evaluate the impact of assimilating synthetic SWOT altimetry data with HYCOM+RODAS on Brazil Current kinetic energy (11◦ - 34◦S). Three experiments were carried out to achieve this goal: expt 1.0, assimilating only synthetic SST assimilation; expt 1.1, assimilating synthetic SST and nadir SLA data; and expt 1.2, assimilating synthetic SST, nadir SLA data, and SWOT SLA data. The result of the generation of synthetic SSH data showed very high SWOT errors in the regions of the outer edges of each band of the satellite ground track. However, HYCOM+RODAS managed to assimilate this data as it was evident in the analysis increment along the SWOT ground tracks. Mean Kinetic Energy (MKE) and Eddy Kinetic Energy (EKE) elds improved both on the surface and in depth when SWOT synthetic data were assimilated in HYCOM+RODAS. The features in the MKE and EKE elds in expt 1.2 were more similar to those in the ROMS run. The best correlations for the SSH elds, zonal and meridional velocities with respect to ROMS were found in in expt 1.2. RMSE of SST with respect to ROMS in these three experiments was reduced by more than 50% when compared to the control run. The results obtained with the OSSE performed in this work showed the possible benets and impacts in the MKE and EKE in the assimilation of SWOT data will bring to the representation of the mesoescale circulation of the BC.

MEMBROS DA BANCA:
Interno(a) - 1562309 - CARLOS ALESSANDRE DOMINGOS LENTINI
Interno(a) - 1868627 - JANINI PEREIRA
Externo(a) à Instituição - LEONARDO NASCIMENTO LIMA - INPE