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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B7. Istanbul 2004 
  
  
  
   
  
  
   
Convective — Land Stratiform - Land 
20 : 0 
— Lightning s Lightning 
15 = Lightning 60} = Lightning 
m free T free 
c ijr 
M 
LL 
20 
i] 
0. B58 x9 1 44 8:16 
R(mm/h) R(mm/h) 
Convective-Ocean Stratiform-Ocean 
rT a Freeman en aq 
— Lightning n — Lightning 
15 77 Lightning 601 — Lightning 
m free A^ free 
N X 
Ne 2 
T T 
9 Q 
LE i 
uL LL 
o D ux N 8 à 7 4 6 811 
R(mm/h) R(mm/h) 
Figure 4. Percentage of convective (left) and stratiform (right) 
cases versus rainfall rate for rain clouds with lightning (red) and 
lightning free (blue) on the land (top) and ocean (below). 
2.2. Rain Area and Convective Fraction 
Following Morales and Anagnostou (2003), the cloud fraction 
with rain is defined using a brightness temperature less than 273 
K whose there are corresponding rain areas accused by TRMM- 
PR. This way is determined the more frequent temperature for 
each cloud or Tmode and its area. 
Following Morales and Anagnostou (2003) and based on the 
data statistical analyses, it was initially obtained for the clouds 
lightning free, the following intervals of Tmode which represent 
the best relation: Tmode < 210; 210 < Tmode x 220; 220 « 
Tmode < 230; 230 < Tmode x 240; 240 « Tmode x 250; 250 « 
Tmode x 260; 260 « Tmode x 270; and Tmode » 270. The 
other hands, for the clouds with lightning were obtained the 
following intervals: Tmode < 220; 220 « Tmode x 240; 240 « 
Tmode x 260; and Tmode » 260. 
The figures 5 and 6 present the relations of rain fraction for the 
NLTG and LTG clouds, respectively, taken into account all 
classified Tmode (or intervals). It is noted as long as that 
Tmode reduce the rain fraction areas increase that could be 
connected to the intensification of convective. 
  
  
Tmode «210 
100 , T n 
aor 
6G 
  
  
  
Rain Area/Cloud Area (5) 
  
0.0 cz D.4 0.6 0.8 1.0 
Area Bellow Trnode/Total Cloud Area 
220 < Tmode < 230 
  
100 
aor 
80 
407%) 
  
zo£ 
e cl 1 1 1 
00" 02 04 06 OR 1.0 
Area Bellow Tmode/Total Cloud Arta 
  
Rain Áraa//Cloud Area (X) 
  
240 « Tmode « 250 
  
100 
80 
eor 
sal 
20F x 
o 
0.0 0.2 D.4 0.6 0.8 1.0 
Aren Bellow Tmode /Totol Cloud Area 
  
  
  
Rain Area /Cloud Area (5) 
  
260 « Tmode « 270 
  
100 
aor 
8o 
40H 
20r 
o 
00 02 D4 06 08 1.0 
Arco Bellow Tmode/Total Cloud Arta 
  
Roin Araa/Cloud Area (%) 
  
  
  
Rain Argo/Cloud rea (&) Rain Area/Cloud Area (#5) 
Rain Area//Cloud Area (5) 
Roin Araa/Cloud Area (%) 
   
   
  
  
210 « Tmode « 220 
  
  
  
0.0 oz D.4 0.5 0.8 1.0 
Areo Bellow Traede/Total Cloud Area 
230 « Tmode « 240 
  
o 
QOO 03 04 06 CB 1,0 
Aren Bellow Trnode/Total Cloud Area 
250 < Tmode < 260 
  
  
  
  
JO 02 D4 O6 OE 10 
Aren Bellow Tmede /Totol Cloud Area 
260 < Tmode < 270 
  
  
  
09 70.2 04 06 C8 1.0 
Arca Bellow Tmode/Total Cloud Arta 
  
Figure 5. Rain fraction of the clouds lightning free for different 
Tmode (or classes). 
  
  
   
  
  
  
  
  
  
  
  
Tmode «220 
T T T 
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o 
o 
x 
o 
2 
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Y oL J 
0 L 1 1 1 
0.0 0.2 0.4 0.6 0.8 1.0 
Area Bellow Tmode/Total Cloud Area 
240 « Tmode « 260 
100 T T T T 
® BO 
o 
5 
1 60 
o 
3 
ö 
d^ 
B 
€ 
£ 
o 
x 20r 
0 1 1 1 1 
0.0 0.2 0.4 0.6 0B 1.0 
Area Bellow Tmode/Total Cloud Area 
  
Rain Area/Cloud Area (%) 
Rain Area/Cloud Area (X) 
220 « Tmode « 240 
100 T T T T 
  
  
  
  
a 1 i L 1 
0.0 0.2 0.4 0.6 0.8 1.0 
Area Bellow Tmode/Total Cloud Area 
  
  
260 < Tmode 
T T 
100 T T 
Bar 
20r $ 1 
  
  
0 : L 1 1 
0.0 0.2 0.4 06 0B 1.0 
Area Bellow Tmode/Total Cloud Area 
  
  
Figure 6. Rain fraction of the clouds lightning for different 
Tmode (or classes). 
2.3. Assignment of Rainfall Rate 
1259