Winter storms arrive in California from the Northern Pacific near Alaska that ar

Question

Winter storms arrive in California from the Northern Pacific near Alaska that are cool and from the tropical Pacific near Hawaii that arc warm. Assume for the purposes of this assignment that the winter storms of interest arc 100 km wide, 300 km long and are 1 km thick. The storms arrive at an average altitude of 1.0 km and are saturated in water vapor. Storm clouds pass over the Sierra Nevada at an average elevation of 3.0 km and all water that condenses becomes precipitation. Further assume a saturated adiabatic lapse rate of 5 degree C/km. (a) If the Alaskan storm arrives with a temperature of 10 degree C, what volume of liquid water is deposited as precipitation? (b) If the Hawaiian storm arrives with a temperature of 20 degree C, what volume of liquid water is deposited as precipitation?

Explanation / Answer

Answer:

An average lapse rate of dew point with respect to atmospheric temperature are 10oC per km until the saturation point reached after that the temperature will fall at the rate of 6oC per km. And, here the condition is given that the lapse rate is 5oC per km therefore, if the storms comes with low temperature then precipitation would be low than the storm which have high temperature.

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