General_circulation_part_II_v3_2010v3

General_circulation_part_II_v3_2010v3 - General Circulation...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
General Circulation – Part II General Circulation – Part II General Circulation – Part II General Circulation – Part II 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
The importance of the Hadley Circulation for The importance of the Hadley Circulation for transport of energy, heat and moisture transport of energy, heat and moisture 1000mb winds (annual mean) Massive amounts of heat moisture and momentum (Kinetic energy) are carried by the Hadley cell H H H H H H H H H H High pressure systems High pressure systems over the oceans are over the oceans are sources of moisture sources of moisture (large rate of (large rate of evaporation) that are evaporation) that are transported by the transported by the trades in the Hadley trades in the Hadley Cell towards the Cell towards the continents and low continents and low 2
Background image of page 2
In the rise limbs of the Hadley cells heat and In the rise limbs of the Hadley cells heat and moisture are carried into the upper part of the moisture are carried into the upper part of the atmosphere atmosphere Surface Heating Surface Heating Transport of moisture and Transport of moisture and heat by ascending currents heat by ascending currents (updrafts) in convective (updrafts) in convective clouds clouds Water vapor condenses and Water vapor condenses and releases heat into the releases heat into the atmosphere. atmosphere. Regions with intense Regions with intense convection are therefore convection are therefore important sources of heat for important sources of heat for large areas – Example: the large areas – Example: the Amazon Basin. Amazon Basin. 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
At the top of the troposphere 9-12km above At the top of the troposphere 9-12km above the surface the air turns poleward the surface the air turns poleward Surface Heating Surface Heating Example of Divergence at the top of tropical storms 4
Background image of page 4
Transport of kinetic energy by Hadley circulation Kinetic Energy is the energy due to the motion of the air The total kinetic energy in the atmosphere can be broken down into three energy components: 1) zonal mean, 2) Transient Eddy and 3) Stationary eddy. Zonal winds 1) 1) Zonal Zonal Mean : Ex. Kinetic energy associated with subtropical Mean : Ex. Kinetic energy associated with subtropical Jets. Jets. Not very Not very important in low latitudes where meridional winds important in low latitudes where meridional winds are more important are more important More important in high latitudes (Westerlies) TRADE WINDS V- meridional U-zonal V- meridional
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Transport of kinetic energy by Transient edies 2) Transient Eddy –Represents energy 2) Transient Eddy –Represents energy produced by air motion in travelling produced by air motion in travelling disturbances (Ex. Tropical storms) disturbances (Ex. Tropical storms) This transient eddy form is exported from the low This transient eddy form is exported from the low to high latitudes to high latitudes 6
Background image of page 6
heat from low latitudes to high latitudes. This
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 64

General_circulation_part_II_v3_2010v3 - General Circulation...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online