[I want the USA back]

Just how does one propose to take the temperature of the ocean? A temperature probe every cubic mile? How many would be needed?

In the end, there is no way to take the temperature of the ocean. The ocean is not a single object. It is huge, vast, enormous.

[FreedomPoster]

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.

[Ben Ficklin]

They use satellites for that. The US has a fleet of earth observing satellites. They are managed under NASA Earth Sciences Division and NASA, NOAA, and USGS operate different satellites. Other nations also operate satellites.

The first EOS was Poseidon/Topex launched in 1992 to measure sea level and ocean topography. It was replaced with Jason 1, Jason 2, and Jason 3 in 2016.

[aquila48]

Or worse yet imagine measuring the change in ocean levels within millimeters (as they claim to do) with the constant perturbations of changing waves, tides, winds... in all the different locations.