科学素养与生活应用·英语30篇（4）

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洋流如何在全球地表分配热量

Warm surface currents like the Gulf Stream carry tropical heat northward along eastern coastlines.
Cold deep currents return cooler, denser water toward the equator in a global conveyor belt.
This thermohaline circulation regulates climate—Europe stays milder than Canada at similar latitudes.
Melting polar ice adds freshwater, lowering salinity and potentially slowing current flow.
Satellites track sea-surface temperature and color to map current speed and direction.
Marine ecosystems depend on upwelling zones where cold, nutrient-rich water rises near coasts.
El Niño events temporarily shift Pacific currents, altering rainfall patterns worldwide.
Ships and submarines use current data to optimize fuel efficiency and navigation routes.
Changes in current strength correlate with long-term droughts and intensified monsoon seasons.
Climate models now integrate ocean-atmosphere coupling to improve decade-scale predictions.