Walker Circulation is the closed circulation cells in the zonal-vertical plane with pronounced vertical upward and downward motion and favorable zonal motions at lower and upper troposphere in opposite directions.
South east Asian monsoon walker Circulation has its ascending limb over Eastern India, Bangladesh, and Burma while its descending limb lies over Pakistan and adjoining desert region
Equatorial Pacific Walker Circulation has its ascending limb over west equatorial Pacific near Indonesia and descending limb over central and east pacific dry zone.
Dr T. N. Krishnamurti (in1979) studied about walker circulation on the basis of 3 month average 200mb flow pattern
Upper tropospheric divergence outflow
Northern summer
1. Asian summer monso0on region
2. Pacific coast of south Mexico
Southern Summer
1. Central Africa
2. Indonesia
3. North west part of south America
Sinking Regions
Northern summer
1. Mid-Pacific Trough
2. Mid-Atlantic Trough
3. North africa
Southern Summer
1. Mid-Pacific Trade Belt
2. Mid-Atlantic Trade Belt
Reference:
Page 11.17,Chapter 11, Volume 3 , Tropical Meteorology by G. C. Asnani
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