Analysis of Rainfall Patterns in Figure 3.2
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Questions and Answers

What is the term for precipitation caused by air being lifted over high topographic surfaces?

  • Frontal precipitation
  • Orographic precipitation (correct)
  • Convectional precipitation
  • Cyclonic precipitation
  • Which side of mountain ranges in the United States typically receives more precipitation due to orographic lifting?

  • West (correct)
  • South
  • East
  • North
  • What contributes to arid conditions prevailing on the downwind side of high topographic surfaces after the air mass has moved over them?

  • Increased humidity
  • High pressure system
  • Dry air mass (correct)
  • Decreased wind speed
  • What is the main factor influencing the size distribution of raindrops in a storm?

    <p>Rainfall intensity</p> Signup and view all the answers

    Which of the following factors can cause falling raindrops to deviate from a spherical shape?

    <p>Pressure difference and air resistance</p> Signup and view all the answers

    What effect does the diameter of raindrops have on their stability while falling through the air?

    <p>Larger raindrops are more stable</p> Signup and view all the answers

    What method is used to measure snowfall in mountainous areas?

    <p>Aerial snow surveys with depth gauges</p> Signup and view all the answers

    How are snow courses samples collected for measurement?

    <p>Using specially designed tubes that sample complete snow depth</p> Signup and view all the answers

    What is a common error in nonrecording rain gauges when measuring precipitation?

    <p>Water creeping up on the measuring stick</p> Signup and view all the answers

    What is one of the corrections needed for evaporation in rainfall measurement?

    <p>Approximately 2% correction for evaporation</p> Signup and view all the answers

    How do aerial snow surveys help in predicting runoff amounts?

    <p>By comparing equivalent water depth with observed runoff</p> Signup and view all the answers

    What is the purpose of setting up depth-measuring equipment on snow ranges?

    <p>To help watershed managers make predictions of runoff</p> Signup and view all the answers

    What causes the highest rainfall in the western mountains?

    <p>Initial rise of the air over the western mountains</p> Signup and view all the answers

    Why is lower annual rainfall generally observed as air moves down the mountain slopes?

    <p>Dry air rising to higher elevations</p> Signup and view all the answers

    Which factor contributes to increased rainfall toward the eastern boundary of the United States?

    <p>Increased moisture along the Atlantic Ocean</p> Signup and view all the answers

    Why are funnel-shaped hoods inserted in rain gauges?

    <p>To minimize evaporation losses</p> Signup and view all the answers

    What is a common problem associated with rainfall measurements using rain gauges?

    <p>Presence of nearby vegetation and buildings</p> Signup and view all the answers

    How are rain gauges classified based on their functionality?

    <p>Based on recording capabilities</p> Signup and view all the answers

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