rter: Chihying Chen, Xiaomin Chen
Embedded conve
cells (Usually con
ice crystal due to
strong updraft
hat could we “dig out” from the high-resolution,
lti-channel polar satellite?
o distinguish the cloud phase in TS Flossie with the help of
ti-channel analysis
is well known overshooting tops (OTs) exist in strong
vections within mature Hurricanes. Is that still true in the le
nse TSs？
loud phase: (Scatter plot of Hydra)
DIS: B1(.65µm) and B7(2.1µm) (Daytime not available)
RS: M5(.67µm) and M11(2.25µm);
M5(.67µm) and M10(1.61µm)
VIIRS 2013/07/29 23:53Z
M5(.672µm)
(2.25µm)
te daytime data is only available in VIIRS
.
2.25µm)
M5(.672µm)
11(2.25µm)
Not consiste
Why?
M5(.672µm)
0(1.61µm)
Bingo!
M5(.672µm)
How to find OTs?
Ø DCP=IRW (IR window)-
MODIS: B27(6.7µm) – B3
(11.0µm)
(Velden and Olander (1998
Bosart et al. 1999)
Ø There is one condition th
result in DCP >0, WV BT c
become warmer due to the
presence of water vapor pu
into the lower stratosphere
convective cloud tops (OTs
MODIS 2013/07/29 11:20Z
6.7µm) (11µm)
B27(6.7µm)
>1 degK
rivial band difference may lead to magnificent discrepancy
eflectivity (M11(2.25µm) and M10(1.61µm)) . Water
ensitivity dominates!
now particle reflectivity is sensitive to the different
hannels; visible light channel (.67µm) shows a much
arger reflectivity than that of M10(1.61µm) when
etecting the ice cloud.
TS Flossie do contains OTs embedded in convective
loud like Hurricanes.(ice cloud).
WV BT indicates the intrusion of dry air into the inne
ore of Flossie.