[Solved] Which of the following statements about the Indian Ocean Dipole (IOD) is correct? — Ans: IOD is a periodic oscillation of sea surface temperatures in the Indian Ocean. | Static Core GK

Static Core GK - Indian Polity (Static)

Which of the following statements about the Indian Ocean Dipole (IOD) is correct?

AIOD is a periodic oscillation of sea surface temperatures in the Indian Ocean.

BNegative IOD causes warming of western Indian Ocean waters.

CPositive IOD leads to decreased rainfall over India during monsoon.

DIOD has no impact on the Indian monsoon rainfall.

Step-by-Step Solution

Step 1: Understand Indian Ocean Dipole (IOD)
IOD is a climate phenomenon involving oscillation of sea surface temperatures between western and eastern Indian Ocean.
Step 2: Analyze effects of IOD phases
Positive IOD causes warming in western Indian Ocean and generally increases Indian monsoon rainfall; negative IOD causes cooling.
Step 3: Identify correct statement
IOD is a periodic oscillation of sea surface temperatures in the Indian Ocean.
Step 4: Eliminate incorrect options
Positive IOD increases rainfall, not decreases; negative IOD causes cooling, not warming; IOD impacts monsoon rainfall.
Final Answer:
IOD is a periodic oscillation of sea surface temperatures in the Indian Ocean → Option A
Quick Check:
Indian Ocean Dipole = periodic sea temperature oscillation ✅

Quick Trick: IOD = sea temperature oscillation affecting monsoon.

Common Mistakes:

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Which of the following statements about the Indian Ocean Dipole (IOD) is correct?