University:
Boston University
Course:
CAS EE 144 | Introduction to Oceanography
Academic year:

2024
Views:

234

Pages:

11
Author:

Lafuentedqri

First Search • Use the global ocean forecast model to track the debris reversely to determine where the plane probably was. 1. G-NCOM-Global Navy Coastal Ocean Model 2. US Navy Global Ocean Model (HYCOM) 3. French Atlantic Ocean Model (MERCATOR) Why did it take 6 days to find the surface debris? Phase 3 International Modeling Group (Mercator, IOS Southampton, CLS, Meteo France, Ifremer, UBrest, SHOM, INM Russia, Ecole Normale Supérieure, FVCOM, WHOI) Background and Requirement for Model Simulation Background oceanic environment North Equatoria l Current Equatoria Sout h Equa toria l l Counter Requirement for model simulation • Accurate meteorological forcing (winds, air-pressure ; heat flux, etc) • Resolve the meso-scale variability of the sea surface elevation (or Sea Surface Height-SSH) • Reproduce the surface mixed layer …. Current Curr ent • In a range of the inter-tropic wind convergence zone • Near-surface currents varies significantly with time and in space; • Difficulties for Modeling 1. We have no well-validated meteorological forcing conditions 1) Blended winds-from multi-satellite measurements 2) NCEP reanalysis global winds (~ one degree) 3) ECMWF global winds 2. No high-resolution satellite-derived SST and SSH available in the local region to resolve short-term and meso-scale variations 1) SST: ~8 km (but it is constructed from multi-day data) 2) SSH: ~every 7 days (do have daily date from March-June, 2009) and ~30 km (http://www.aviso.oceanobs.com/en/data/products/sea-surface-height-products/) 3. No sufficient local data to validate the model WRF Location: -30.96289W 4.01686N ECMWF Blended