---
title: "La Niña: Cool Phase of El Niño | Model Diplomat"
description: "La Niña is the cool phase of the El Niño–Southern Oscillation, crucial for understanding climate patterns, especially for civil services and policy research."
url: "https://modeldiplomat.com/learn/glossary/la-nina"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- La Niña is the cool phase of the El Niño–Southern Oscillation, marked by abnormal cooling of the central and eastern equatorial Pacific surface waters.
- How does La Niña differ from El Niño in its effect on the Indian monsoon?
- What index is used to officially declare a La Niña event?
- How does La Niña relate to the Walker Circulation and trade winds?
- Why does La Niña matter for global temperature trends?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

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In 2022, NOAA confirmed a rare third consecutive ("triple-dip") La Niña, which intensified eastern Australia's flooding and prolonged a catastrophic multi-season drought across the Horn of Africa.

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