ATOC 1060 1st Edition Lecture 6 Outline of Last Lecture I. Black Body RadiationII. Cause of Greenhouse Effect III. Cloud influence on ClimateOutline of Current Lecture I. Climate Sensitivity & Climate FeedbacksII. Atmospheric Circulation & Hadley CellCurrent LectureI. Climate Sensitivity & Climate FeedbacksGlobal Climate Model (GCM): coupled numerical model that solves equations based on laws of fluid motion and physical climate processesDouble atmospheric Carbon Dioxide from 300ppm-600ppm=global mean temperature increases Water Vapor FeedbackMore warming = more evaporation = more water vaporMore cooling = more condensation = less water vaporSnow and Ice Surface Albedo FeedbackMore warming = lower albedo = more warmingMore cooling = lower albedo = more coolingCloud FeedbacksThese 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.Cloud changes with increased CO 2 can either cause cooling or warming depending on cloud height and thickness- Likely Positive but uncertainII. Atmospheric Circulation & Hadley Cell1. Tropics are warmer than the poles because they get more overhead sun than the poles2. Creates uneven distribution3. Heat is then transferred from equator towards the poles to reach equilibrium (balance)Heat is transferred from the tropics to the poles by  Atmospheric Circulation Ocean CirculationIn the troposphere, most of the heat transport takes place also where temperature decreases with heightAir Parcels- They rise and sink due to density differences- When air parcels are warmer or cooler than their surroundings they rise or fall- The buoyancy is controlled by the temperature of the air parcelVertical motion can occur mechanically Winds run into mountain and are forced to riseHot Air BalloonWarm air inside is less dense than cold air surrounding it Becomes positively buoyant and risesHot air rises so the balloon rises tooBalloon will continue to rise until the density of air outside the balloon matches the insideLevel of neutral buoyancy: level at which the balloon stops risingIf air in balloon is more dense than the surrounding air, the balloon will have negative buoyancy and sinkCold air sinks so the balloon sinks tooIdeal Gas Law-It relates pressure temperature and density P=pRTDensity and TemperatureInverse