Why the coldest part of a night is most of the time at dawn? How do we explain this signifiant temperature drop?
EDIT: I get answers telling that’s because sun has been out the longest when sun rises again. Indeed it makes sense that the night will continuously go coolest, but the weird thing is: There is a real, proper drop on the thermometer every morning at the dawn, event if we stayed at 5°c all night long, at the very first lights, it will drop to 4°c and then go back to 5°c a moment later (actually happened again this morning).
The reason of this radical drop is my question.
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In: Geology
The entire night the earth, which held a lot of leftover heat (like how a baked potato stays hot once its out of the oven, is releasing its heat. At sunrise, the maximum amount of heat has been released before new heat is introduced by the sun. And while it seems like the sun should make things warmer at sunrise, the sun is not actually above the horizon at sunrise. It’s really like 6 degrees or so below the horizon and we can see it because the atmosphere bends the light towards our eyes. There is also some debate about evaporative cooling from the dew, similar to how sweating makes us cooler, but I believe this is largely trivial.
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