ATOC 1060 1st Edition Lecture 3 Outline of Last Lecture I. Equilibrium TemperatureII. Observed Greenhouse GassesIII. Ozone HoleA. Discovery, cause, solutionIV. Ozone Hole A. Changes, sources, lifetimesOutline of Current Lecture I. Albedo, Coupling, Feedback loopsII. EquilibriaA. Stable vs UnstableIII. Daisy WorldCurrent LectureI. Albedo, Coupling, Feedback LoopsAlbedo: The reflexivity of a surface, expressed as a fraction of the total incident sunlight reflected by a surface.Clouds help keep the Albedo of a planet a lot lower Albedo for Clouds: 0.5Albedo for Ocean: 0.05Albedo for Land: 0.01-0.9Positive feedback loop leads to warming of the planetNegative feedback loop stabilized warmingNegative feedback loop have odd number of negative couplingsThese 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. Lower Albedo leads tomore absorbed sunlightMore absorbed Sunlight leads to less Sea IceLess sea Ice leads to lower AlbedoIncreased temperatures lead to larger cloud albedo larger cloud Albedo leads to less absorbed sunlightless absorbed sunlight reduces temperatureII. Equilibria- Stable/UnstableStable Equilibria: A state in which the system will remain if left undisturbed and to which the system will return with disturbed. (Valley)Unstable Equilibria: A state in which the system will remain if left undisturbed but even sdlight disturbances will carry the system to some other (stable) equilibrium state. (Peak)Stable Equilibria= Negative feedback loopsUnstable Equilibria= Positive feedback loopsDisturbing equilibria: Forcing and perturbationIII. Daisy WorldAn example of Albedo, Coupling, Feedback Loops, Equilibrium States-Covered with white daisies and grey soil-Albedo of daisy world depends on how much daisy’s there are-When daisy coverage increases daisy world gets colder-When daisy coverage decreases daisy world gets warmer-Increasing temperature will increase or decrease daisy Coverage -Vey temperature