Unlike the alien life in the 1958 movie “The Blob,” starring Steve McQueen, there is a bit of ambiguity about whether the 1,000-square-mile mass of warm water lurking off the California coast—named by scientists after the film—is an evil force.
The Blob has been on scientists’ radar screen since the fall of 2013. The circular water mass, around 100 yards deep, is, on average, around 5.5 degrees warmer than surrounding ocean. It warms the air blowing over it and headed inland, exacerbating shortfalls in precipitation. That means reduced snowpack and faster evaporation of rain.
The changed ocean conditions affect sea life patterns, reshaping ecosystems and redirecting migratory routes. But scientists don’t agree what caused it, are confused about its relationship to climate change and can’t say with any degree of certainty what its ultimate effects will be.
The range of experts sampled across the media highlighted what probably appears to be one of the more interesting aspects of climatology—at least to the experts: There is an awful lot not known about the science.
Some have linked the blob to an El Niño-like pattern called the Pacific Decadal Oscillation (PDO), which shifts in sea surface temperatures during long cycles. The last time it shifted the way it is now, back in the 1970s, it was followed by a bunch of wet El Niño winters over two decades time.
Bill Patzert, a climatologist at JPL, and others see it as a possible precursor to the “pineapple express” storms that soak the state in some winters. “Whether it's this year or next, it's coming,” Patzert told NBC Los Angeles. He said it would be a “drought buster.”
He sounded a bit more subdued a month earlier on a NASA website when he said, “This sea surface height map is a ‘keep-your-fingers-crossed, there’s-some-hope’ image. That’s not a forecast, but there is a glimmer of hope.”
Why just a glimmer of hope? “El Niño is a temporary blessing or curse. El Niño can't cure an increasing water demand due to population and economic growth.”
Good point. Humans might have something to do with this whole drought thing and they’ve just started working on that. It takes time to change old habits, antiquated laws and societal priorities.
Dennis Hartmann, a University of Washington professor of atmospheric sciences, took a long view of the blob in a joint release from the American Geophysical Union (AGU).
“It’s an interesting question if that’s just natural variability happening or if there’s something changing about how the Pacific Ocean decadal variability behaves. I don’t think we know the answer. Maybe it will go away quickly and we won’t talk about it anymore, but if it persists for a third year, then we’ll know something really unusual is going on.”