Said another way, from a Thermodynamics perspective, temperature is a point property, a function of location and time. This is expressed as:
T = f(x, y, z, t)
Average temperatures can be determined, but when you are trying to determine the average of a huge control volume, like the ocean here, or the atmosphere of the entire Earth, measurement to obtain an accurate average is *extremely* problematic.
Now, realize that the temperature record of the ocean not all that long ago was at the level of a guy throwing a rope attached to a bucket with a mercury thermometer inside, lowering it z’, waiting a short bit for it to equilibrate, hauling it up fast, and reading the mercury. And from this the Warmists are ultimately making arguments over fractions of a degree over millions of square miles over tens or hundreds of years?
It’s just laughable, but no one can say that or they lose funding.
#19 is for you
Now, realize that the temperature record of the ocean not all that long ago was at the level of a guy throwing a rope attached to a bucket with a mercury thermometer inside, lowering it z’, waiting a short bit for it to equilibrate, hauling it up fast, and reading the mercury. And from this the Warmists are ultimately making arguments over fractions of a degree over millions of square miles over tens or hundreds of years?
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And variant methods mixed in, and with systemic route changes - such as a regulation change which causes a lot of ships to reflag and go to different ports.