Open AccessAtmospheric circulation during active and break phases of Indian summer monsoon: A study using MST radar at Gadanki (13.5°N, 79.2°E)
Author(s) -
Roja Raman M.,
Jagannadha Rao V. V. M.,
Venkat Ratnam M.,
Kishore Kumar G.,
Narendra Babu A.,
Vijaya Bhaskara Rao S.,
Prabhakara Rao N.,
Narayana Rao D.
Publication year - 2008
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2008jd010341
Subject(s) - hadley cell , monsoon , zonal and meridional , atmospheric sciences , climatology , stratosphere , troposphere , atmospheric circulation , environmental science , atmospheric research , monsoon of south asia , walker circulation , general circulation model , geology , climate change , el niño southern oscillation , oceanography
The unique facility of measuring vertical winds using Indian mesosphere, stratosphere, and troposphere (MST) radar along with zonal and meridional winds enables the study of atmospheric circulation over Gadanki (13.5°N, 79.2°E) during the Indian summer monsoon season. The mean meridional circulations during winter and monsoon seasons represent part of two different Hadley circulations. The winter Hadley cell is observed to be stable whereas the monsoon Hadley cell seems to vary and depends on the monsoon activity. During active phase of the monsoon, the Hadley cell extends to the north, and during weak phase, it extends to the south of the study region. The observed features are compared with the winds obtained from National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis data. The present study emphasizes that the atmospheric circulation during monsoon season is to be studied separately for active and break phases.