Climate scientist Roger Pielke, Sr has noted
that land surface temperature records (which comprise the vast majority of temperature records prior to the satellite era (1979-)) are unreliable
due to land use changes and urban heat island effects, and that we should therefore look to ocean heat content changes as the most reliable metric for assessing global heating and cooling. The oceans cover 71% of the global surface area and hold at least 1000
times more heat than the atmosphere. Many have claimed that the 'missing heat' from 'anthropogenic global warming' has gone into the oceans, even though the heat seems to be 'missing' from the oceans as well. Recent data from the ARGO network
of ~3200 floating robot sensors has shown that since full deployment of the system in ~2003, the ocean heat content has declined despite steadily rising 'greenhouse' CO2 levels:
From Loehle 2009: Cooling of the global ocean since 2003
How could this be? Here are the physical reasons why increasing concentrations of 'greenhouse gases' would not be expected to increase ocean heat content.
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