但是气象学家们在记录和描述哈德莱环流时，并没有真正理解它的运行机制。
But while the Hadley Circulation had been documented and described, meteorologists didn't really understand how it physically worked.
海洋研究学者哈里·布莱登带领一个小组，监察着整个大西洋环流的其它关键变化。
Led by oceanographer Harry Bryden, the team detected other key changes in the overall Atlantic circulation system.
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