Slate manages to make oceanography and climate change interesting. I think they sensationalize a bit, which is unnecessary because the story is compelling on its own merits. But I don’t see this kind of coverage anywhere else and I enjoy it. You could spend a month drilling down to all the links they provide. An excerpt:

The news comes amid increasingly confident forecasts that there will be a strengthening El Niño for the remainder of 2015, which could spark a litany of impacts worldwide, not the least of which is the more efficient transport of heat from the oceans to the atmosphere. That liberated heat from the Pacific Ocean should boost global temperatures to never-before-recorded levels, making 2015 the warmest year ever measured…

Besides El Niño, a more worrying, longer-term trend is also taking shape. The Pacific Decadal Oscillation (PDO) is a decades-long periodic warming of the Pacific Ocean that tends to favor bursts of accelerated global warming. As I wrote last October, the Pacific appears to be in the midst of a shift into a new warm phase that could last 20 years or so.

The PDO—or, “the blob” as it’s been referred to recently—is starting to freak out some scientists. There are emerging signs of a major shift in the Pacific Ocean’s food chain, including a dearth of plankton, tropical fish sightings near Alaska, and thousands of starving sea lion pups stranded on the California coast. As Earth’s largest ocean, what happens in the Pacific affects the weather virtually planet-wide, and that means an “imminent” jump in global warming may have already begun—spurred on by the PDO.