Climate impacts
Five ocean hotspots share more than just heat
Open access · cc by · source: Europe PMC
Five Southern Hemisphere warming hotspots keep rapid SST rise, but acidification is unlikely to be the main 21st-century threat there.
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Five ocean hotspots share more than just heat
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The analysis used 23 models from the CMIP5 archive.
we repeated the analysis for the 23 models from the CMIP5 archive
Subtropical western boundary currents are warming two to three times faster than the global ocean mean.
waters of subtropical western boundary currents are warming two to three times faster than the global mean for the world's oceans
Key findings
SST rise is unequivocal; other drivers are noisier; aragonite undersaturation is unlikely in these five hotspots this century; circulation shifts (especially the East Australian Current) are an extra stressor.
Methodology
Mapped CMIP5 SST hotspots and used a NEMO earth-system run under RCP8.5 to compare SST, mixing, nitrate, primary production, oxygen, aragonite, and currents off eastern Australia, Brazil, South Africa, India, and Madagascar.
Limitations
Does not measure local fisheries catch or community adaptation outcomes, and coarse models miss some tropical hotspot dynamics.
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