Monsoons

Monsoon Flow Patterns (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.)

Thickness View of the Monsoon (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.)

Force Balances: Impact of Friction (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.)

Symmetric Heating: Walker Circulation (Figure obtained from Gill (1980), © 1980 Royal Meteorological Society/Wiley Interscience.) (u,v) - vectors w - contours (u,v) - vectors p - contours Meridionally- integrated flow heat forcing

Symmetric Heating: Hadley Circulation (Figure obtained from Gill (1980), © 1980 Royal Meteorological Society/Wiley Interscience.) zonal velocity streamfunction pressure perturbation

Recall: n = 1 ER and n = 0 MRG Waves (Figure obtained from Matsuno (1966), their Figures 4c and 6b. © 1966, J. Meteor. Soc. Japan.) n = 0 MRG Wave n = 1 ER Wave

n = 2 Equatorial Rossby Waves (Figure obtained from Matsuno (1966), their Figure 5c. © 1966, J. Meteor. Soc. Japan.) Location of maximized speed convergence Winds maximized near equator and decay rapidly N/S from there Negligible cross- equatorial flow Location of maximized divergence

Asymmetric Heating: Monsoon (Figure obtained from Gill (1980), © 1980 Royal Meteorological Society/Wiley Interscience.) (u,v) - vectors w - contours (u,v) - vectors p - contours heat forcing

Asymmetric Heating: Monsoon (Figure obtained from Gill (1980), © 1980 Royal Meteorological Society/Wiley Interscience.) zonal velocity streamfunction pressure perturbation

Symmetric + Asymmetric Solution (Figure obtained from Gill (1980), © 1980 Royal Meteorological Society/Wiley Interscience.) (u,v) - vectors w - contours (u,v) - vectors p - contours

Asian Monsoon: Structure (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.) Shaded: OLR (lower: more convective) Vector: 850 hPa Winds (m s -1 ) Streamlines: 200 hPa Winds

Asian Monsoon: Key Features (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.)

Asian Monsoon: Normal Onset Date (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.)

Asian Monsoon: Precipitation (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.) Near India W. Pacific Ocean

Oceanic Transport: Asian Monsoon (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.) Grey arrows: oceanic transport at the bottom of the oceanic mixed layer (~45° in layer-average, ~90° at bottom of layer)

Mei-yu/Baiu Front (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.)

Mei-yu/Baiu Front: Precipitation (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.) Total Rainfall Mei-yu/Baiu-related Rainfall

Monsoon Trough (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.)

Structure of the Australian Monsoon (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.) Shaded: OLR (lower: more convective) Vector: 850 hPa Winds (m s -1 ) Streamlines: 200 hPa Winds

Oceanic Transport: Australian Monsoon (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.) Grey arrows: oceanic transport at the bottom of the oceanic mixed layer (~45° in layer-average, ~90° at bottom of layer)

Australian/Maritime Continent Monsoon (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.)

West African Monsoon (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.) NH Summer SH Summer Shaded: OLR (lower: more convective) Vector: 850 hPa Winds (m s -1 ) Streamlines: 200 hPa Winds

Monsoons of the Americas (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.) North American Monsoon South American Monsoon

North American Monsoon (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.)

South American Monsoon (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.)

Indian Ocean Dipole (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.)

Active and Break Periods (Figure obtained from Introduction to Tropical Meteorology, 2 nd Edition, © 2011 COMET.) active break Convection Modulation Red: suppressed Blue: enhanced