North Equatorial Indian Ocean Convection and Indian Summer Monsoon June Progression: a Case Study of 2013 and 2014

2017 ◽  
pp. 19-31
Author(s):  
Ramesh Kumar Yadav ◽  
Bhupendra Bahadur Singh
Keyword(s):  
Indian Ocean ◽  
Summer Monsoon ◽  
Indian Summer Monsoon ◽  
Equatorial Indian Ocean ◽  
Ocean Convection

scholarly journals Role of equatorial Indian Ocean convection on the Indian summer monsoon

MAUSAM ◽  
2021 ◽  
Vol 72 (2) ◽  
pp. 457-462
Author(s):  
BODDEPALLI MURALI ◽  
M. S. GIRISH KUMAR ◽  
M. RAVICHANDRAN ◽  
G. BHARATHI
Keyword(s):  
Indian Ocean ◽  
Summer Monsoon ◽  
Indian Summer Monsoon ◽  
Equatorial Indian Ocean ◽  
Ocean Convection

Predicting Extreme Phases of the Indian Summer Monsoon*

2009 ◽  
Vol 22 (2) ◽  
pp. 346-363 ◽  
Author(s):  
Qinghua Ding ◽  
Bin Wang
Keyword(s):  
Indian Ocean ◽  
South China Sea ◽  
Central Asia ◽  
Summer Monsoon ◽  
South China ◽  
Indian Summer Monsoon ◽  
Equatorial Indian Ocean ◽  
Tropical Convection ◽  
The South China Sea ◽  
Northern India

Abstract Extreme active and break phases of the Indian summer monsoon (ISM) often bring about devastating floods and severe draughts. Here it is shown that these extreme phases exhibit distinctive precursory circulation conditions in both the tropics and extratropics over a range of antecedent periods. The extremely active monsoon over northern India is preceded by a strengthening of the upper-tropospheric central Asian high and enhancement of the tropical convection over the equatorial Indian Ocean and the South China Sea. The concurrent buildup of the anomalous high over central Asia and the arrival of tropical convection over northern India increase the likelihood of occurrence of a heavy rainy period there. Similarly, the concurrent anomalous low over central Asia and the arrival of suppressed convection originating from the equatorial Indian Ocean and the South China Sea precede extremely strong monsoon breaks over northern India. Two predictors can be used to predict the extreme active/break phases of the northern ISM: normalized 200-hPa geopotential height over central Asia and outgoing longwave radiation over southern India. Once the mean of the two predictors exceeds a threshold unit (1.0), an extreme phase is anticipated to occur over northern India after 4–5 days and reach peak intensity after an additional 2 days. In general, an event forecast by this simple scenario has a 40% probability of developing into an extreme phase, which is normally a small probability event (a less than 4% occurrence).

scholarly journals Extremes of the Indian summer monsoon rainfall, ENSO and equatorial Indian Ocean oscillation

2004 ◽  
Vol 31 (12) ◽  
pp. n/a-n/a ◽  
Author(s):  
Sulochana Gadgil ◽  
P. N. Vinayachandran ◽  
P. A. Francis ◽  
Siddhartha Gadgil
Keyword(s):  
Indian Ocean ◽  
Summer Monsoon ◽  
Indian Summer Monsoon ◽  
Monsoon Rainfall ◽  
Indian Summer Monsoon Rainfall ◽  
Equatorial Indian Ocean ◽  
Summer Monsoon Rainfall

A 500,000 year record of Indian summer monsoon dynamics recorded by eastern equatorial Indian Ocean upper water-column structure

2013 ◽  
Vol 77 ◽  
pp. 167-180 ◽  
Author(s):  
Clara T. Bolton ◽  
Liao Chang ◽  
Steven C. Clemens ◽  
Kazuto Kodama ◽  
Minoru Ikehara ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Water Column ◽  
Summer Monsoon ◽  
Indian Summer Monsoon ◽  
Equatorial Indian Ocean ◽  
Column Structure ◽  
Eastern Equatorial Indian Ocean ◽  
Monsoon Dynamics
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