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Naval Research Laboratory

HYCOM Consortium for Data-Assimilative Ocean Modeling


Real-time 1/12° Global HYCOM Nowcast/Forecast System

The global system has been using atmospheric forcing from the NAVy Global Environmental Model (NAVGEM) version 1.1 (labeled 91.0). On 8 April 2014 the forcing was switched to NAVGEM version 1.2. The label for the new experiment is 91.1. Posted 8 April 2014.

Disclaimer: A numerical instability started to develop in the equatorial Atlantic Ocean on May 10. This was caused by the NCODA-3DVAR analysis not being able to converge to the correct solution. Because profiles are assimilated more than once, the instability persisted for some days. A correction to NCODA was implemented on May 20th.

Mean plots


System information


Click on the ocean of interest to see regional plots

Atlantic Ocean    Indian Ocean    Pacific Ocean    Polar Oceans    Global


Comparison with in situ data


NCODA Observations


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