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Sunrise Scientific Cruise

The sun rises off the bow off the research vessel Neil Armstrong during an expedition in the North Atlantic in September 2017 led by WHOI paleoceanographer Lloyd Keigwin. Scientists and crew took cores to extract a column of seafloor sediments. The sediments preserve clues that researchers can use to reconstruct how the ocean circulated in the past. The deeper the core, the further back in time the clues go. The scientists’ goal was to reach sediments a few meters down, which were deposited during Earth’s last glacial period when ice sheets were at their greatest extent. (Photo by Christopher Griner, Woods Hole Oceanographic Institution)