Review of Conservation of angular momentum (a second look) The Atmopsheric Circulation (a view from space and from NWS models) A closer look at Huricanes,

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Presentation transcript:

Review of Conservation of angular momentum (a second look) The Atmopsheric Circulation (a view from space and from NWS models) A closer look at Huricanes, their formation and the oceanic response Zonal average circulation Radiative Budget Atmosheric Circulation Part III

Review of Conservation of angular momentum (a second look) The Atmopsheric Circulation (a view from space and from NWS models) A closer look at Huricanes, their formation and the oceanic response Zonal average circulation Radiative Budget Atmosheric Circulation Part III

Schematic depiction of the development of the atmospheric circulation, starting from a state of rest Westerlies Easterlies (Trades)

Review of Conservation of angular momentum (a second look) The Atmopsheric Circulation (a view from space and from NWS models) A closer look at Huricanes, their formation and the oceanic response Zonal average circulation Radiative Budget Atmosheric Circulation Part III

A look at the atmospheric circulation from space ens/loops/wxloop.cgi?wv_moll+/14d/ Advection of water vapour associated with Eastrerlies and Westerlies Strong convection over tropical region Generation of Tropical Cyclones

equator

ITCZ: Inter-Tropical Convergenze Zone

Midlatitude Instabilities /~ovens/loops/wxloop.cgi?ir_centr al+/48h/3h

Poleward Heat Transport

Midlatitude Cyclones

Warm Front Cold Front Tropical Air Polar Air Tropical Air

ITCZ: Inter-Tropical Convergenze Zone Midlatitude Instabilities /~ovens/loops/wxloop.cgi?ir_centr al+/48h/3h

L L L L L L L H HH H H H Eq. Low Subtropical High Subpolar Low Polar High

Review of Conservation of angular momentum (a second look) The Atmopsheric Circulation (a view from space and from NWS models) A closer look at Tropical Cyclones, their formation and the oceanic response Zonal average circulation Radiative Budget Atmosheric Circulation Part III

Tropical Cyclones Webster P.J, G. J. Holland, J. A. Curry, H.-R. Chang (2005) Changes in Tropical Cyclone Number, Duration, and Intensity in a Warming Environment, SCIENCE Emmanuel, K. (2004) Increasing destructiveness of tropical cyclones over the past 30 years, NATURE Articles RITA ington.edu/~ovens/loop s/wxloop.cgi?fronts_ir_e ast+/48h/ ington.edu/~ovens/loop s/wxloop.cgi?fronts_ir_e ast+/48h/

L F pressure F Coriolis

Why do tropical storms intensify?

Vortices L F pressure F Coriolis H F pressure High Pressure System Low Pressure System

Tropical cyclone have an eye of anticyclonic circulation!

Storm Surge: sea level rises because of the low atmospheric pressure system

Review of Conservation of angular momentum (a second look) The Atmopsheric Circulation (a view from space and from NWS models) A closer look at Tropical Cyclones, their formation and the oceanic response Zonal average circulation Radiative Budget Atmosheric Circulation Part III

Vertical view of the atmosphere and Poleward Transport of Heat Equator Pole Hadley Cell Ferrel Cell Polar Cell

Review of Conservation of angular momentum (a second look) The Atmopsheric Circulation (a view from space and from NWS models) A closer look at Tropical Cyclones, their formation and the oceanic response Zonal average circulation Radiative Budget Atmosheric Circulation Part III

Radiative Budget

Rotation effects are not always important

Land-Sea Breeze

Moonsoons, a continental scale land-sea breeze