Vaisala RS41, Руководство пользователя

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User’s Guide ______________________________________________________________________
94 ___________________________________________________________________M211486EN-A
Total Ozone from Sounding
The total ozone from the sounding is calculated by summing up the
amount of ozone in the layers between two measurement points as
expressed in the equation below. When using the units indicated in the
list below, the equation gives the total ozone in units of grams per
square meter (g/m
2
).
where:
When the constants are inserted into the equation, it reduces to:
A commonly used unit for total ozone is Dobson Unit (DU = 2.687
×
10
20
molecules/m
2
). To get the result in DUs, ozone grams must first be
divided by molar mass of ozone 48.00 g/mol and then multiplied by
Avogadro's number 6.02217
×
10
23
molecules/mol. The result is ozone
in molecules/m
2
. The unit relation above is used to convert this to DUs.
= 1.6571, ratio of molecular masses of ozone and air
g = 9.80665 m/s
2
, acceleration of gravity
p
i
... p
i+n
= Ambient pressure, [hPa]
i = Index for a measurement point
p
3i
... p
3i+n
= Ozone partial pressure [mPa]
M
3
= 48.00 g/mol, molar mass of ozone
NOTE
The equation above gives the ozone in grams per square meter (g/m
2
).
:
s
'
H
3
g
-----
p
3
p
i
ln d
pi
³
H
3
p
3
i
p
3
i l
+
+
g 2
------------------------------------
p
i
p
i 1 +
-----------
© ¹
§ ·
ln
i
¦
= =
H
3
:
s
'
0.0845
p
3 i
p
3 i 1 +
+
u
p
i
p
i 1 +
-----------
© ¹
§ ·
ln
i
¦
=