Lecture 3 and 4
Lecture 3 and 4 ATM 102
Stony Brook U
Popular in Introduction to Weather and Climate
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This 3 page Class Notes was uploaded by Cora Man on Monday February 15, 2016. The Class Notes belongs to ATM 102 at Stony Brook University taught by Professor Mak in Winter 2016. Since its upload, it has received 22 views. For similar materials see Introduction to Weather and Climate in Physical Science at Stony Brook University.
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Date Created: 02/15/16
Lecture 3 09/06/12 - Weather usually moves west to east - Hurricanes: central Atlantic (Bermuda) – go to Florida – hook to north (along eastern seaboard) – travel east (ALWAYS HOOK RIGHT) - Relative humidity increases as temperature drops - Trophs: change in wind direction - All hurricanes start off at the coast of Africa Lecture 4 09/11/12 - Incoming radiation = visible energy has a shorter wavelength o Some absorbed, are reemitted as heat (long waves) are intercepted and absorbed by clouds/water vapor/other gases and rereleases radiation = continually heats up atmosphere > then escapes into outer space Long wave radiation = HEAT 1000 photons coming in – 1000 photons going out to maintain the constant temperature of the earth = steady state - Total greenhouse effect is on the order of 33degrees Centigrade o 66 degrees of that is due to water vapor o Baseline condition and superimpose additional changes - Water vapor only absorbs radiation at very specific wave lengths - So what happens when the abundances of greenhouse gases increase? - Feedbacks Further increase or mitigate greenhouse effect o Radiating force – amount of forces that you absorb and emit o More water vapor = stronger greenhouse effect o Positive feedback/ WATER VAPOR FEEDBACK – average temperature increases, amount of water vapor increases (able to be calculated) Responsible up to half of the predicted effect of the consistency of feedback (BIG) Cloud formation (clouds will absorb more outgoing radiation, enhancing greenhouse effect) Ice melt – decrease albedo (ice=white) and less incoming radiation is being reflected and more radiation is being absorbed Indirect effect – ice melts and form clouds o Negative feedback – cloud formation (increase albedo/reflectivity – reduce the amount of incoming radiation the atmosphere traps – net effect = less radiation in system) Clouds are good insulators – on a clear dark night = colder than cloudy night - Clouds = positive feedback/negative feedback = big uncertainty of the role of greenhouse effects o More clouds forming – warmer temperatures – enhance greenhouse effect or reduce o Ice Lecture 3 09/06/12 - Weather usually moves west to east - Hurricanes: central Atlantic (Bermuda) – go to Florida – hook to north (along eastern seaboard) – travel east (ALWAYS HOOK RIGHT) - Relative humidity increases as temperature drops - Trophs: change in wind direction - All hurricanes start off at the coast of Africa
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