December 11, 2008 Meeting Summary
Mingjing Tong presented an update on her work with the assimilation of
airborne Doppler radar data with GSI for hurricane initialization and
prediction. A control run (which used GFS analysis) was compared to runs
using assimilated radial velocity. For the case of Felix, the radial
velocity data had a negative impact on track and intensity, however this
impact was not large. The negative impacts were smaller for Karen. When
the runs with assimilated radial velocity, which used the GFS forecast,
were compared to a different control, which also used the GFS forecast,
track and intensities for the assimilated radial velocity were closer to
the best track values. More cases are going to be run for this work,
which is ongoing.
Hyun-Sook Kim discussed some topics from the 2008 NOAA Hurricane
Conference she attended, which group members then weighed in on.
Specifically, the group discussed the need to design a method of
real-time data transfer of ocean observations from field campaigns.
There is currently a 12-hour turn-around rate for observational data,
and ways to reduce this time are still awaiting funding. If data can be
obtained more efficiently, it must then be examined and tested for
relevancy before being assimilated. The next topic was the use of
measurements taken from Gustav and Ike. Hyun-Sook mentioned about a
3-month wait for such data, which would be very useful once obtained.
Finally, Hyun-Sook mentioned the topic of open communication or
interaction with other groups working on coupling HYCOM with the WRF.
Some examples given were HRD and FSU. It was agreed that cases for this
work should be carefully chosen so that they are most useful to both