Saturday, January 27, 2018

Ocean Heat Content Reaches Record Highs

We all know by now -- or should know -- that ocean heat content (OHC) is easily the best metric of a global energy imbalance -- about 93% of the trapped heat goes there.

At least, The Guardian has caught on.

The OHC data for 4Q17 are in, and it shows that in 2017, the OHC of the top sixth and the top half of the global ocean both reached record annual values:

In 2017, the heat uptake for the 0-2000 m region -- the top half of the ocean -- was 1.6 W/m2 relative to 2016, and its acceleration, in just 12 years of data recording, is 0.039 ± 0.018 W/m2/yr.


Layzej said...

Is there a good chance that the 12 year trend for OHC down to 2000m is not representative of the long term trend?

David Appell said...

Do you mean, could it be a natural fluctuation? I'm not sure how to address that -- this is all the data there is for 0-2000 m -- but I haven't read any scientist who thinks that. Doesn't mean no one does, I just don't know.

Layzej said...

My naive guess is that it is probably not going to continue with that acceleration. It looks like the record starts at somewhat of a high point: