Are La-Nina and positive Indian Ocean dipole similar?
The Indian Ocean dipole is essentially a measure of the difference in sea surface temperatures between the western and eastern Indian Ocean.

The El Nino and La Nina are the opposite phases of the El Nino Southern Oscillation cycle that occurs in the Pacific Ocean.

The only similarity with the Indian Ocean dipole, is that the difference between the sea surface temperature between the central western Pacific Ocean &amp; central eastern Pacific Ocean are measured.