The North Australia Metocean Study (NAMOS) is a Joint
Industry Project (JIP) that responds to the need for
an assessment of the extreme wind and wave climate
offshore North and Northwest Australia, which is largely
associated with tropical cyclones. The original NAMOS
JIP consisted of 77 top-ranked tropical cyclones from
the northwest shelf subregions of Carnavon Basin and
Timor Sea/Browse Basin. To expand the population of
storms, track-shifting was imposed on all of the storms
with an average of 9.45 shifts per storm. Later, Phase
2 increased the number of nominal storms to 124 and
the number of shifts to an average of 14.66 shifts
per storm. The most recent update was completed in
late 2014 and addressed 160 tropical systems from
the period 1970-2013. NAMOS is archived every 15 minutes
on a 7-km grid with Spectra archived at 777 locations.
is a secondary JIP that concentrates on extra-tropical
cyclones primarily from 3 regimes: easterly trade
wind intensifications, westerly trade wind enhancements,
and long period swell imported from intense extra-tropical
cyclones that migrate across the Southern Indian Ocean.
Nearly 200 events were chosen for this hindcast between
1979 and 2013 and archived 1-hourly on the same NAMOS
grid. Spectra are available at 784 locations.
who join both the NAMOS
and NAMOS-II JIPs are eligible to join NAMOS-Comp.
This latest JIP combines both storm populations into
a long-term, comprehensive, uniform operational hindcast
for the period 1979-2013 and is archived 1-hourly.
Spectra are available at 796 locations.
(GFNA) addresses the need for day-to-day continuous
operations. It is the only portion of the NAMOS project
that is available for purchase by the grid point for
non-JIP participants. It is available in in bulk for
JIP participants only. GFNA used the same 7-km grid
system, but the final archive ends east of 131E. The
hindcast is archived 1-hourly from 1999-2009.