Dipole Mode Index (DMI) Monthly Time-series

Describes SST gradient in Indian ocean.

Correlation of annual DMI time-series with Annual SST from the HadISST1.1 SST dataset for 1870-2021. The east-west gradient is illustrated

WRIT TS

Description and Specifications

Description

Intensity of the IOD is represented by anomalous SST gradient between the western equatorial Indian Ocean (50E-70E and 10S-10N) and the south eastern equatorial Indian Ocean (90E-110E and 10S-0N). This gradient is named as Dipole Mode Index (DMI). When the DMI is positive then, the phenomenon is referred to as the positive IOD and when it is negative, it is referred as the negative IOD.

Temporal Coverage

Monthly values: 1870/01 to near present
Update Status: Monthly

Data Notes

Units: degC

Get Data

Time-series List

DMI (HadISST) : Standard PSL Format, CSV, and NetCDF (What is standard format?)
DMI East (HadISST) : Standard PSL Format, CSV, and NetCDF (What is standard format?)

Source, citation and related Information.

Related Time-series

None

Links

NOAA DMI Webpage

Original Source

Index is calculated at PSL using this NCL code

Time-series source dataset(s)

HadISST1.1 Dataset

Citation

Possible impacts of Indian Ocean Dipole mode events on global climate. Authors: Saji, NH;Yamagata, T, CLIMATE RES, 25 (2): 151-169 DEC 5 2003.M

References

Possible impacts of Indian Ocean Dipole mode events on global climate. Authors: Saji, NH;Yamagata, T, CLIMATE RES, 25 (2): 151-169 DEC 5 2003.M