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ISU GEO 211 - Air masses and fronts, el nino and la nina
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GEO 211 1st Edition Lecture 28 Outline of Last Lecture I. Ocean currentsA. Caused by:1. Prevailing wind2. Coriolis force3. Ocean temperature/salinity differences4. Tides5. Shoreline configuration B. Gyres- large scale, ocean circulation caused by subtropical anticyclone- Cold currents- Warm currents C. Importance of ocean currents1. Exchange of energy between low and high latitudes2. Sustaining global heat balance3. Moderate climate (weather) conditions in some areas D. Coasts with cold ocean currents experience:1. Frequent fog2. UpwellingOutline of Current Lecture II. El Nino and La NinaA. El nino- abnormal warming of the Pacific Ocean between South America and Australia and Indonesia in the equatorial regionB. La nina- extensive, below normal cooling of the central/eastern Pacific OceanIII. Air masses and frontsA. Air mass- large body of air that has a uniform weather characteristics, particularly temperature and water vapor contentB. Source regions (birthplace): flat land surfaces with light windsThese 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.Current LectureII. El Nino and La NinaA. El nino- abnormal warming of the Pacific Ocean between South America and Australia and Indonesia in the equatorial region- Event occurs during Christmas season- “little boy” or “Christ child” in Spanish- 1st recognized by fishermen along the coasts of Ecuador and Peru- During event, warm equatorial waters pile up along Ecuador/Peru coasts (easternPacific)- Warm water block upwelling of color, nutrient-filled water along coast, devastating the fish industryB. La nina- extensive, below normal cooling of the central/eastern Pacific Ocean- Stronger trade winds push warm water westwards- Reversal of surface atmospheric pressure between E/W pacific is called Southern OscillationIII. Air masses and frontsA. Air mass- large body of air that has a uniform weather characteristics, particularly temperature and water vapor contentB. Source regions (birthplace): flat land surfaces with light winds- Cover large land surfaces- Air masses acquire characteristics of regions they develop- Characteristics of air masses are slightly modified when they move to other


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ISU GEO 211 - Air masses and fronts, el nino and la nina

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