Wednesday, July 26, 2017

New Ocean Heat Content Data is Out

The ocean heat content (OHC) for the 2nd quarter of 2017 has just been published, and it shows strong warming from a year ago.

Data: 0-700 m; 0-2000 m.

OHC for both regions is actually down slightly from a quarter ago, but this seems like the usual occurrence. But they're both up compared to 2Q16:

0-700 m region four-quarter change: +1.8 W/m2
0-2000 m region four-quarter change: +2.3 W/m2

where, again, I spread the heat change over the Earth's entire surface, since almost all (about 93%, plus or minus) of the trapped heat goes into the ocean.

By my calculations, the OHC of the 0-2000 m region -- basically the top half of the ocean -- is accelerating since 1Q2005 at 0.04 ± 0.02 (W/m2)/yr. That uncertainty is 2σ, and doesn't include consideration of autocorrelation.

Here are the graphs. Since OHC is the best measure of a planetary energy imbalance, it's clear the planet has kept warming.

1 comment:

jch1952 said...

I find this interesting. I expected very little energy would be lost in the El Niño, and it appears very little was.