CU-Boulder ATOC 1060 - ATOC CH 5-11 (17 pages)

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ATOC CH 5-11



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ATOC CH 5-11

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Pages:
17
School:
University of Colorado at Boulder
Course:
Atoc 1060 - Our Changing Environment: El Nino, Ozone, and Climate
Our Changing Environment: El Nino, Ozone, and Climate Documents

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Sarah Rose ATOC 1060 Midterm 2 Ch 5 11 Chapter 5 Circulations of the oceans Ocean scale ocean depth 5 km months to thousands of years fast current Gulf Stream 10 km hr Atmosphere scale tropopause 10 km days to weeks weather fast winds Jet Stream 100 km h Ocean is slower because water is heavier Atmosphere goes around whole globe ocean confined by continents to ocean basins Ocean circulation Wind driven surface flow at surface horizontal currents wind powered Thermohaline circulation thermo temperature Haline salt density of sea water determined by temperature and salinity driven by density changes in density result in rising and sinking sea water currents both horizontal and vertical Most incoming solar energy absorbs at surface bottom of atmosphere top of ocean Top of ocean is heated hot water rises but it already at the top no vertical motion ocean is stratified meaning warm water near surface cold water on bottom Atmosphere structure Troposphere lowest Stratosphere 2nd layer Tropopause boundary between them Ocean is 2 layers surface mixed layer warm thin mixed by wind deep ocean cold thick Layers separated by thermocline Moving ocean water ocean current Coriolis force turns the current all occurring with in top layer Ocean Gyres atmospheric circulation and Ekman spiral large planetary scale ocean circulations main feature of wind driven surface circulation not uniform fast currents at western side of ocean basins western boundary currents ex Gulf Stream in N Atlantic Thermohaline Circulation less dense water on top more dense bottom warm lighter cold more dense fresh lest dense salt more dense no vertical motion Near poles water gets cold and salty enough to sink to bottom Bottom water formation only occurs near Antarctica Sinking results in rising water somewhere else overturning of ocean Very slow timescale 1000 years Circulations coexists wind driven surface circulation and thermohaline circulation both occur a parcel of water is affected by both Ocean energy



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