The scenario being this:
The red band extending 15 degrees from the equator is a dead zone, too hot for complex, multicellular life to thrive. How hot are we talking? The equator in this scenario scorches up to 165 degrees Fahrenheit. The last time the tropics got this hot was 270 million years ago. How the catastrophe happened is a mystery. After all, we still don't know how the Paleocene-Eocene Thermal Maximum happened so quickly and so dramatically.
But outside the red band, in regards to temperature and circulation, what would the rest of Earth's oceans look like in this scenario?