MTEOR 206 1nd Edition Lecture 4 Outline of Last Lecture I. Properties of The Atmosphere Outline of Current Lecture I. Blizzard DefinitionII. Station Pressure vs. Sea-Level PressureIII. WindIV. Seasons and The EarthCurrent LectureI. Blizzard Definitiona. The following conditions must prevail for more than 3 hours: sustained wind or frequent gusts at 35 mph or more and considerable falling or blowing snow that frequently reduces visibility to less than ¼ milei. No falling snow = a ground blizzardII. Station Pressure vs. Sea-Level Pressurea. Station pressure: The actual pressure recorded by a barometer at a given locationb. Sea-level pressure: Pressure the barometer would read at a given location if the barometer were lowered to a given reference point, or to sea-levelc. Must remove topography from the pressure field to get the best meteorological readingIII. Winda. The atmosphere in motionb. 2 parts of wind: speed and directionc. Read as “coming from” (i.e. the winds are coming from the southwest) d. Wind tends to blow from high to low pressuree. Surface winds in the northern hemisphere are clockwise and outwardIV. Seasons and The Eartha. Primary cause of seasons is the tilt of the Earth’s axisThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.b. The Earth revolves around the sun every 365 daysc. In January, we are closer to the sun than in July. Why? Because distance is not the only factor in seasons.i. Seasons are regulated by the amount of solar energy received ii. The more energy, the warmer the Earth should beiii. The amount of solar energy received is determined by the angle at which sunlight strikes the