Global ocean temperatures have been rising for at least a century

Locations of Argo's ocean-profiling robots

The location of Argo's 3,500 ocean-profiling robots in the world's oceans. (Credit: Image courtesy of Scripps Institute of Oceanography)

A new study contrasting ocean temperature readings of the 1870s with temperatures of the modern seas reveals an upward trend of global ocean warming spanning at least 100 years.

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