[gamerdonkey]

I have many questions about your methodology:

- How many stations were you left with?

- Did that number decline over time (as you excluded replacement stations)?

- What was your scale?

- Are you willing to share your results?

- How is this still the top comment after 30 minutes?

But your comment touches on a common misconception, which is that heat islands must be excluded to accurately measure the overall temperature. You refer to the idea as "heat-producing objects", but I would argue that a parking lot is more of a heat reflecting object. More to the point, even heat islands must be considered as part of the worldwide climate, simply because they are part of this wide world. Their heat does not simply disappear (I hope you agree that would violate physics).

Imagine we want to measure the average temperature inside a single 30-foot by 10-foot room during winter. We have two probes: one near a burning fireplace on one end of the room, and one near a window on the other. If we excluded data from one probe or the other, do you believe we would get an accurate average reading?

Of course, when scientists are calculating a global temperature, they have to handle special cases in the data (like heat islands). This has been known for some time, and you can read more about it here: https://www.realclimate.org/index.php/archives/2007/07/no-ma...

I fear that I've spent too much time responding to this, but I wanted to take it on in earnest.