(c) Tropical Cyclone Bondo: Horizontal Structure

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(c) Tropical Cyclone Bondo Horizontal Structure
NICAM Successfully Simulates Real Tropical
Cyclones
H. Fudeyasu, Y. Wang (IPRC), M. Satoh, T. Nasuno,
W. Yanase, H. Miura (FRCGC)
(a) Observed and simulated storm tracks of
Tropical Cyclone Bondo and Tropical Storm Isobel
(b) Tropical Cyclone Bondo Vertical Structure
TRMM surface rain
NICAM surface rain and wind
The first successful simulations of real
tropical cyclones by a global cloud-resolving
model, the Nonhydrostatic ICosahedral Atmospheric
Model (NICAM), at a resolution of dx 7 km. Shown
in (a) are JTWC best track data for Tropical
Cyclone Bondo and Tropical Storm Isobel and the
NICAM storm tracks for these two disturbances
(b) NICAM vertical structure of the eye wall and
rain band of Bondo (c) TRMM and NICAM horizontal
structure of Bondo.
C
D
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Tropical Storm Isobel MJO Triggered
Cloud Features
NICAM 18 days integration (2 Jan )
Meteorological satellite data 2 Jan, 2007 black
body temperature showing clouds
Tropical Storm Isobel was triggered by the
cyclonic wind shear due to westerly wind bursts
near the Equator.
MJO
MJO
TS Isobel
TS Isobel
Evolution of TS Isobel in NICAM Surface rain
rate in mm/h (color bar) and wind
9days
14days
17days
MJO
MJO
TS genesis
TS born
Evolution of TS Isobel in NICAM shows that strong
westerly wind bursts around the Equator increased
cyclonic vorticity south of the Equator,
generating Tropical Storm Isobel.