Ocean Currents: The Global Conveyor Belt

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## TL;DR

Ocean currents form a global "conveyor belt" — the thermohaline circulation — that redistributes heat, nutrients, and carbon dioxide across the planet. Driven by temperature and salinity gradients, this system regulates global climate, supports marine ecosystems, and takes roughly 1,000 years to complete one full cycle.

## Core Explanation

Ocean currents are driven by wind (surface currents, top 400m), density differences (deep currents), and the Coriolis effect. The Atlantic Meridional Overturning Circulation (AMOC) is a critical component — its potential slowdown due to climate change is a major scientific concern. Ocean currents transport 30-50% of anthropogenic CO2 absorbed by oceans. Major systems include the Gulf Stream (warming Western Europe by 5-10°C), the Antarctic Circumpolar Current (the strongest, moving 130 million m³/s), and the North Pacific Gyre. NOAA's Global Drifter Program tracks surface currents via satellite-tracked buoys.

## Detailed Analysis

[详细分析、统计数据、历史发展和进一步阅读。待后续补充。]

## Further Reading

- [Source 1 — Ocean Currents: The Global Conveyor Belt](https://www.noaa.gov/education/)

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