Open AccessDecadal variations of Hadley and Walker circulations in the tropics
Author(s) -
B. N. Goswami,
Manu Anna Thomas
Publication year - 2001
Publication title -
mausam
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.243
H-Index - 12
ISSN - 0252-9416
DOI - 10.54302/mausam.v52i1.1673
Subject(s) - hadley cell , walker circulation , climatology , environmental science , atmospheric circulation , tropics , atmospheric sciences , general circulation model , geology , climate change , el niño southern oscillation , oceanography , fishery , biology
Preliminary estimate of divergent Hadley and Walker circulation associated with inter-decadal variations in the tropics is made with 50-year reanalysis data and compared with their inter-annual counterparts. Interdecadal and inter-annual components are separated using harmonic analysis and meridional and zonal mass flux stream functions are used to calculate the strength of Hadley and Walker circulations. The magnitude of inter-decadal Hadley and Walker circulation anomalies are shown to be comparable to those associated with dominant inter-annual variations. How superposition of inter-decadal and inter-annual divergent circulations may influence regional climate is discussed.