TCAR - Typhoon Committee

Fig. 13: 850hPa Wind and Radar Echo (shade) of
Koppu (0915) through Assimilation Analysis (a)11
hours before landing; (b)landing; (c)7 hours after
landing.
A field observation experiment
An outfield observation experiment was launched in
2008 and 2009 and tropical cyclones Kammuri, Nuri,
and Hagupit in 2008 as well as Goni and Koppu in 2009
were obtained regarding their motions. Observational
data was acquired at the Maoming scientific
experiment base. Field experiments were conducted
and observational data were collected, and other
TCAR
CHAPTER 1 - TYPHOON COMMITTEE ACTIVITIES
cooperators assisted in selecting observation sites
and conducting observations. Main field observation
equipment used in the 2008 field experiments
included a wind profiler, a microwave radiometer, and
a mobile microwave radiometer at Beishan station, in
Maoming base. Main outfield observation equipment
used in the 2009 experiments consisted of 4 fixed
wind profilers (Beishan of Maoming, Zhuhai and
Shenzhen), a mobile observing system (including a
mobile wind profiler and ultrasonic pulse instrument),
and a GPS sounding set.
Figure 4 shows that the mobile wind profiler at
Taishan, Guangdong province, captured the TS Goni
as it passed the observation site and the wind speed
decreased and then increased, indicating that the
centre of the typhoon was going through the site and
began to tilt at 2,500 m level.
Fig. 14: The Vertical Wind Profile of TS Goni (0907) by
Mobile Radar Wind Profiler
Figure 5 shows, under the impact of Koppu, the
mobile observation system on Hailing Island of
Yangjiang recorded significant deflection in wind
direction without showing any TC-eye structure, at
the observation point.
Fig. 15:Vertical Wind Profile of TS Koppu (0915) from
mobile radar wind profiler
Shanghai Typhoon Institute, CMA carried out the
field experiment on typhoon “Morakot “ that landed in
2009
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