Call for calm over hot, rising seas

underwater light

Richard Cumming takes a look at recent observational data on two topics often raised and guaranteed to cause concern. They are used both to “prove” the existence of rapid warming and as an example of the ills soon to befall us if we don’t prevent them. But both uses fail on a cool examination of the facts. The Climate Conversation Group calls for calm to prevent public hysteria.

Recent global mean sea level and ocean heat content trends

UPDATE 31 JAN 2011

“The sea level continues to rise” is a familiar refrain, but the AGW hypothesis, along with the IPCC AR4, both predict an accelerating rate of rise in the global mean sea level. The IPCC prediction is simply:

“Anthropogenic forcing is also expected to produce an accelerating rate of sea level rise.”

That sea levels are rising is undisputed, but what are the recent trends of both mean sea level (MSL) and its companion, ocean heat content (OHC)? Is MSL accelerating in accordance with the predictions?

Cumulative sea level change from 1905 to 2000, adapted from Holgate (2007), shows a steadily decelerating trend over the period: Continue Reading →