Categories of marine heatwaves as defined in Hobsbay et al. (2018): "Categorizing and naming marine heatwaves." Oceanography 31(2):162–173, <a rel="nofollow" class="external free" href="https://doi.org/10.5670/oceanog.2018.205">https://doi.org/10.5670/oceanog.2018.205</a>.
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