2001/12/01 by Karumuri Ashok, Zhaoyong Guan, Toshio Yamagata · 1,208 citations
Environmental Science · Earth and Planetary Sciences · #Climate variability and models #Tropical and Extratropical Cyclones Research #Oceanographic and Atmospheric Processes #Indian Ocean Dipole #El Niño Southern Oscillation #Climatology #Indian ocean #Monsoon #Walker circulation #Environmental science #Atmospheric sciences #Oceanography #Geology
paper · pdf · doi:10.1029/2001gl013294
published in Geophysical Research Letters 28(23), 4499-4502 (American Geophysical Union)
openalex publication_date 2001/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
The influence of the recently discovered Indian Ocean Dipole (IOD) on the interannual variability of the Indian summer monsoon rainfall (ISMR) has been investigated for the period 1958‐1997. The IOD and the El Niño/Southern Oscillation (ENSO) have complementarily affected the ISMR during the last four decades. Whenever the ENSO‐ISMR correlation is low (high), the IOD‐ISMR correlation is high (low). The IOD plays an important role as a modulator of the Indian monsoon rainfall, and influences the correlation between the ISMR and ENSO. We have discovered that the ENSO‐induced anomalous circulation over the Indian region is either countered or supported by the IOD‐induced anomalous meridional circulation cell, depending upon the phase and amplitude of the two major tropical phenomena in the Indo‐Pacific sector.