The East Asian Monsoon affects China, Korea, Japan and surrounding regions with warm, humid summers and cold, dry winters. Its summer phase can produce rainfall exceeding 1,000 mm in parts of southeastern China.

A monsoon trough is an elongated area of low pressure that develops within the larger monsoon circulation. It often serves as a focus for tropical cyclone formation in the western Pacific.

Walker circulation is an east‑west atmospheric circulation over the tropical Pacific driven by differences in sea‑surface temperature. It underlies the seasonal reversal of winds that contributes to monsoon patterns.

The Sahel is a semi‑arid region south of the Sahara Desert in Africa that experiences a short rainy season. Its rainfall is closely linked to the West African Monsoon, a branch of the global monsoon system.

Indian Geography

Monsoon

Seasonal changes in atmospheric circulation and precipitation

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Overview

A monsoon is traditionally a seasonal reversing wind accompanied by corresponding changes in precipitation, but now used to describe seasonal changes in atmospheric circulation and precipitation associated with annual latitudinal oscillation of the Intertropical Convergence Zone, specifically between its limits to the north and south of the equator.

Source: Wikipedia — Monsoon (CC BY-SA)

Key concepts

How Monsoon connects to the ideas, people and events around it.

Intertropical Convergence Zone
driven by
The Intertropical Convergence Zone (ITCZ) is a belt of low pressure encircling the Earth near the equator where trade winds converge. It migrates seasonally and is a primary driver of monsoon circulations.
Indian Summer Monsoon
includes
The Indian Summer Monsoon delivers the majority of annual rainfall to the Indian subcontinent between June and September. In 2022 it contributed over 80 % of the country's total precipitation.
East Asian monsoon
includes
The East Asian Monsoon affects China, Korea, Japan and surrounding regions with warm, humid summers and cold, dry winters. Its summer phase can produce rainfall exceeding 1,000 mm in parts of southeastern China.
Monsoon trough
features
A monsoon trough is an elongated area of low pressure that develops within the larger monsoon circulation. It often serves as a focus for tropical cyclone formation in the western Pacific.
El Niño–Southern Oscillation
modulated by
El Niño–Southern Oscillation (ENSO) is a coupled ocean‑atmosphere phenomenon that influences global climate variability. ENSO phases can weaken or strengthen monsoon rainfall, as seen during the 1997–98 El Niño.
Walker circulation
related to
Walker circulation is an east‑west atmospheric circulation over the tropical Pacific driven by differences in sea‑surface temperature. It underlies the seasonal reversal of winds that contributes to monsoon patterns.
Sahel
affects
The Sahel is a semi‑arid region south of the Sahara Desert in Africa that experiences a short rainy season. Its rainfall is closely linked to the West African Monsoon, a branch of the global monsoon system.
Agricultural productivity
supports
Agricultural productivity in monsoon‑dependent regions relies on the timing and amount of seasonal rains. In India, monsoon variability accounts for roughly 30 % of year‑to‑year fluctuations in crop yields.

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Questions about Monsoon

What is Monsoon?

What are the key concepts related to Monsoon?

The main concepts connected to Monsoon include Intertropical Convergence Zone, Indian Summer Monsoon, East Asian monsoon, Monsoon trough, El Niño–Southern Oscillation, Walker circulation, Sahel, Agricultural productivity. Each is linked on the map above with its own summary.

Which exams cover Monsoon?

Monsoon is part of Indian Geography, which appears in the syllabus of UPSC CSE, UPSC CAPF, NDA, CDS, AFCAT, SSC CGL and 49 more exams.