Chat with Joseph Jacobsen
Climate Scientist and Oceanographer
About Joseph Jacobsen
In 2017, Joseph Jacobsen led the first autonomous glider array to map mesoscale eddy heat transport across the Southern Ocean’s Antarctic Circumpolar Current, revealing that these swirling features carry 40% more thermal energy northward than prior models assumed. That finding forced a major recalibration of IPCC ocean-heat uptake projections and reshaped how climate models simulate poleward energy redistribution. Jacobsen doesn’t treat the ocean as a passive sink but as a dynamic, rhythmic engine, its internal waves, boundary currents, and biogeochemical feedbacks all modulating atmospheric CO₂ drawdown in real time. Based at Scripps, he co-developed the 'Thermohaline Fingerprinting' method, using dissolved noble gas ratios in deep water to trace century-scale ventilation pathways with unprecedented temporal resolution. His fieldwork spans from moorings off Cape Verde to submersible dives in the Tonga Trench, always asking: not just how the ocean stores heat, but how its physics *orchestrates* climate response.
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Not sure where to begin? Try asking Joseph Jacobsen:
- “How did your 2017 Southern Ocean glider array change IPCC heat-transport assumptions?”
- “What does dissolved krypton-85 reveal about Pacific deep-water age?”
- “Can western boundary current eddies accelerate or delay regional warming?”
- “How do diel vertical migrations of zooplankton affect carbon export estimates?”