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Five ocean hotspots share more than just heat
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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Which five hotspots did they focus on?
Eastern Australia, Brazil, South Africa, India, and Madagascar.
Source: From global to regional and back again: common climate stressors of marine ecosystems relevant for adaptation across five ocean warming hotspots · DOI · quote verified
How many CMIP5 models were analyzed?
23 models from the CMIP5 archive.
Source: From global to regional and back again: common climate stressors of marine ecosystems relevant for adaptation across five ocean warming hotspots · DOI · quote verified
How fast are western boundary currents warming?
Two to three times faster than the global ocean mean.
Source: From global to regional and back again: common climate stressors of marine ecosystems relevant for adaptation across five ocean warming hotspots · DOI · quote verified
What baseline defined a climate stressor?
Two standard deviations from the 1990–2010 mean.
Source: From global to regional and back again: common climate stressors of marine ecosystems relevant for adaptation across five ocean warming hotspots · DOI · quote verified
Is ocean acidification a major 21st-century threat in these five hotspots?
Unlikely, even under RCP8.5.
Source: From global to regional and back again: common climate stressors of marine ecosystems relevant for adaptation across five ocean warming hotspots · DOI · quote verified
Which SST trend was unequivocal?
Sea-surface temperature rise in all five hotspot areas.
Source: From global to regional and back again: common climate stressors of marine ecosystems relevant for adaptation across five ocean warming hotspots · DOI · quote verified
Which other drivers were weaker relative to natural variability?
Stratification, DIN, and primary production responses were weak.
Source: From global to regional and back again: common climate stressors of marine ecosystems relevant for adaptation across five ocean warming hotspots · DOI · quote verified
What extra stressor do they highlight besides warming, acidification, and oxygen loss?
Changing ocean circulation, especially western boundary currents.
Source: From global to regional and back again: common climate stressors of marine ecosystems relevant for adaptation across five ocean warming hotspots · DOI · quote verified
What is happening to the East Australian Current?
Southward shift and intensification.
Source: From global to regional and back again: common climate stressors of marine ecosystems relevant for adaptation across five ocean warming hotspots · DOI · quote verified
Which partnership frames the adaptation context?
GULLS, on reducing vulnerability of marine-dependent coastal communities.
Source: From global to regional and back again: common climate stressors of marine ecosystems relevant for adaptation across five ocean warming hotspots · DOI · quote verified
Where do CMIP5 models reproduce hotspots most consistently?
Western boundary current extensions such as Brazil, Kuroshio, Gulf Stream, Agulhas, and East Australian currents.
Source: From global to regional and back again: common climate stressors of marine ecosystems relevant for adaptation across five ocean warming hotspots · DOI · quote verified