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# (Refer to Table 6.3 )At 0 km (sea level)

- San Francisco:

Air temp. = 20oC

Dew Point temperature = 15oC

1.        ( 1 pt.) Calculate the relative humidity at San Francisco if the mixing ratio is 10.83 g/kg; the saturation mixing ratio at 20o C is 14.95 g/kg.  (Show your work to get full credit.)

2.       ( 4 pts.) At Placerville, what is the air temperature?

At Placerville, what is the relative humidity (hint: you see the base of the clouds here!)?

At Placerville, what is the mixing ratio?

At Placerville, what is the saturation mixing ratio?

1.     ( 3 pts.) What is the air temperature at the Sierra Nevada Crest ?

What is the mixing ratio at the Sierra Nevada Crest?

What is the saturation mixing ratio at the Sierra Nevada Crest?

Synthesis

4.        Compare the data at Placerville and the Sierra Nevada Crest and explain why the numbers changed (specifically why the temperature changed, the mixing ratio changed, saturation mixing ratio changed, and the dew point temperature changed.) (2 pts.)

5.                 How much water vapor condensed at between Placerville and the Sierra Nevada crest? (1 pt.)

6.                 (1 pt.) What is the air temperature at Gardnerville?

7.                 (1 pt.) Assume that the mixing ratio is the same as at the Sierra Nevada Crest.

What is the relative humidity at Gardnerville?

(Table provided below)

TABLE 6.3
Variation of Saturation Mixing Ratio with Temperature (at 1000 mb
pressure)
Temperature
(&quot;C)
(&quot;F)
Saturation Mixing Ratio
Over water (5/kg)
Over ice (6/kg)
50
122
88.12
45
113
66.33
40
104
49.81
35
95
37.25
30
86
27.69
25
77
20.44
20
68
14.95
15
59
10.83
10
50
7.76
5
41
5.50
O
32
3.84
3.84
-5
23
2.64
2.52
-10
14
1.79
1.63
15
5
1.20
1.03
-20
-4
0.78
0.65
-25
-13
0.50
0.40
-30
-22
0.32
0.24
-35
-31
0.20
0.14
-40
-40
0.12
0.08

View the full answer

RH
W
X
where RN = relative humidity, in percent;
I - actual mixing ratio; and
SALUTALOT
itio

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