B5-10 
PREPARATION OF CHARTS 
significant level. The completed temperature curve will be labeled ''T" 
at the top and bottom of each chart. 
a. 
Whenever the temperature is colder than -60°C ata pressure 
greater than 400 millibars, and the WBAN-31AA isnot avail- 
able, displace the temperature curve ten degrees to the right 
through the standard stratum affected to permit the tempera- 
ture trace to be plotted on the gridof the adiabatic chart. Re- 
label the temperature grid for the stratum accordingly. The 
thickness of the stratum will be obtained by means of Table 7. 
The limits of doubtful temperature on the adiabatic chart will 
be indicated by entering ''Begin (or End) doubtful temperature" 
close to the temperature curve and on the levels bounding the 
stratum of doubtful temperature, but so that no data will be 
obscured. Strata of missing data will be similarly indicated. 
"Missing Data" will be entered onthe level placed in the mis- 
sing strata. 
The dry adiabatic lines drawn on the adiabatic charts repre- 
sent a lapse rate of 9.76°C perkm. Whenever the temperature 
lapse rate equals or exceeds 9.8°C per km, i.e., when the lapse 
rate is superadiabatic, all data pertaining to the level bound- 
ing the superadiabatic stratum will be rechecked on the re- 
corder record, in the data block, and as plotted on the chart. 
If this recheck does not reveal anerror, the word "'rechecked,"' 
with arrows pointing to the beginning andending of the super- 
adiabatic portion of the curve will be placed to the left of the 
segment of the temperature curve on the adiabatic chart and 
recorder record. 
eeanadd ScSessztascecstiiinsasetia 
= ko @Y) 
POEECEE REPELLED RE Pe 
Seeseeceeeseusenuneneed (ccc cue a bara 
pe i 
y anieae! | 
Figure BS = 3, aS ene Rate 
