十万个为什么·科学阅读30篇（1）

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科学常识延展阅读·自动延展（批次0001-010）

Ocean currents act like a giant conveyor belt, moving warm water from the equator toward the poles.
Cold, dense water sinks near the poles and flows back toward the equator deep underwater.
This thermohaline circulation redistributes heat and affects weather systems worldwide.
The Gulf Stream, for example, keeps Western Europe much warmer than other regions at the same latitude.
Melting polar ice adds freshwater, which may slow down sinking and weaken the current over time.
Satellites and drifting buoys collect real-time data on sea temperature and salinity changes.
Changes in current strength correlate with droughts, floods, and stronger hurricane seasons.
Marine life also follows these currents, influencing fish migration and plankton blooms.
Historical records from ship logs and coral skeletons help reconstruct centuries of current behavior.
Climate models now include ocean dynamics to improve long-term forecasts of regional warming.