Dry Adiabatic Lapse Rate (DALR) = 10°C/km (5°C/0.5 km) Wet Adiabatic Lapse Rate

Question

Dry Adiabatic Lapse Rate (DALR) = 10°C/km (5°C/0.5 km) Wet Adiabatic Lapse Rate (WALR) 6°Clkm (3°CI0.5 km) Using what you have learned about the adiabatic process associated with orographic lifting and Q10. | precipitation, calculate the temperature at the various altitudes on the windward and leeward sides of the mountain in the following diagram. Use the DLAR and WALR as described in the earlier section of the lab Principle Climate Topography Given information: Temperature at Sea Level - 35° C Dew point at Sea Level-15° C 5 km - 4 km - 3 km 2 km - - 5 km 4 km- - 3 km 2 km 1 km- 0 km [Sea Level

Explanation / Answer

ANSWER TO THE QUESTION-

EXPLANATION- The side of the mountain which recieves winds is called Windward side of the mountain and the other side of the mountain Leeward side. The wind which blows towards the windward side of the mountain usually are strong winds which carries lots of moisture. So, when these winds reaches the sides of the mountain, they rises up towards hiher altitudes and since they are much mose cooler, they reach dew point faster and starts precipitating and form numerous clouds. As they mover higher and higher these winds tends to lose temperature and becomes cooler and cooler.

These winds then flows towards the Leeward side of the mountain but by the time they reach the lower latitudes, these winds are much drier and as they decend towards lower altituded further more, their temperature slow slowly increases.

CALCULATION- Given Information-

Temperature at sea level = 35 degrees C

Dew point at sea level = 15 degrees C

WINDWARD SIDE- Every increase in altitude, there will be a decrease in temp (6 degrees/km) WALR

Temparature at sea level = 35 deg C

WALR = 6 deg C/1000 mts

Decrease in temp at 1000 mts = 1000(6/1000)

= 6 deg C

Temp at 1000 mts = 35 deg C - 6 deg C

=29 deg C

Therefore, at the height of 1 Km, the temp will be 29 deg C.

Using the same procedure, the temp at higher altitudes can be calculated as-

Temperature at windward side-

1 km 10a. 29 deg C

2 kms 10b. 23 deg C

3 kms 10c. 17 deg C

4 kms 10d. 11 deg C

5 kms 10e. 5 deg C

LEEWARD SIDE-

(here since DALR is given at 10 degrees C/1000 mts, the temp can be calculated by adding the DALR at every decending altitudes..

5 kms. 5 deg C

4 kms. 10f (5+10) 15 deg C

3 kms. 10g (15+10) 25 deg C

2 kms. 10h (25+10) 35 deg C

1 km. 10i (35 +10) 45 deg C

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