MARCOOS/ESPreSSO ROMS RU Coastal Ocean Modeling and Prediction group John Wilkin, Gordon Zhang, Julia Levin, Naomi Fleming, Javier Zavala-Garay, Hernan.

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Presentation transcript:

MARCOOS/ESPreSSO ROMS RU Coastal Ocean Modeling and Prediction group John Wilkin, Gordon Zhang, Julia Levin, Naomi Fleming, Javier Zavala-Garay, Hernan Arango 5 km resolution for assimilation 1 km resolution for forecast NCEP NAM 3-hour meteorology 1-day average USGS gauge river flow Open boundaries: ROMS MAB-GoM nested within GODAE-HyCOM operational N. Atlantic (He/NCSU) > OPeNDAP data portal > Assimilation experiments in 2006 (4DVar) > Glider observation analysis (Representers)

Assimilation and observing system design experiments in 2006 (LaTTE and SW06) > LaTTE subdomain RU CODAR (with tides) All glider CTD All moored T/S > SW06/MARCOOS/ESPreSSO Now:Climatology (Hydrobase); AVISO altimetry in Slope Sea; SST (AVHRR/MODIS/GOES blended from PFEL CoastWatch) Soon:regional climatology; glider; VOS/XBT; Argo Future:coastal along-track altimetry; in situ and satellite optics and ocean color > Glider observing system design use representers to analyse information content of MARCOOS glider tracks

Forecast skill improvement with assimilation of CODAR 60-day ensemble of all analyses/forecasts u “along-shelf” component

Forecast skill improvement with assimilation of CODAR 60-day ensemble of all analyses/forecasts v “across-shelf” component

The “Representer” (Bennett) is a measure of the covariance/correlation between ocean state variables and a pattern of observations Method: integrate the adjoint model backwards forced at observational locations, then the tangent linear model forward to carry “information” to analysis/forecast times Cost function: Covariance between J and temperature,, reflects the influence of glider observation At time = finish of glider mission

At time = 5 days after finish of glider mission Cost function: Covariance between J and temperature,, reflects the influence of glider observation