Predominant atmospheric and oceanic patterns during coastal marine heatwaves
- Schlegel, Robert W.
- Oliver, Eric C.J.
- Perkins-Kirkpatrick, Sarah
- Kruger, Andries C.
- Smit, Albertus J.
DOIAbstract
As the mean temperatures of the worlds oceans increase, it is predicted that marine heatwaves (MHWs) will occur more frequently and with increased severity. However, it has been shown that variables other than increases in sea water temperature have been responsible for MHWs. To better understand these mechanisms driving MHWs we have utilized atmospheric (ERA-Interim) and oceanic (OISST, AVISO) data to examine the patterns around southern Africa during coastal (<400 m from the low water mark; measured in situ) MHWs. Nonmetric multidimensional scaling (NMDS) was first used to determine that the atmospheric and oceanic states during MHW are different from daily climatological states. Self-organizing maps (SOMs) were then used to clust...
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