Why, when its really cold out, when the sun is rising does the temperature drop a couple degrees?

Question

This phenomenon my occur all the time, I don't know, but I only notice it when its super cold out. What I am referring to is say the temperature is -1 Fahrenheit. Just before the sun rises I notice the thermometer drops a couple of degrees, to like -2, or -3. Then of course once the sun comes up the temperature begins to rise. I've asked several people that I consider pretty smart and nobody seems to have an answer.

Answer 1

Good observations. Here is the answer. This lag between solar insolation and warming occurs for the same reason that maximum temperatures for the day do not occur when we have maximum solar insolation around noon but rather later in the afternoon around 3 - 4 p.m. When the sun comes up it must be absorbed by the earth, the earth must begin to warm and re-radiate longwave infrared radiation which then is responsible for heating the atmosphere. So there is this lag between solar insolation and heating. This is the scientific explanation. Hope this helps a little.

Answer 2

stable question. this happens for a similar reason that optimal temperatures for the day due no longer ensue as quickly as we've optimal photograph voltaic insolation around midday yet particularly later in the afternoon around 3 - 4 p.m. whilst the sunlight comes up it would possibly be absorbed via the earth, the earth might desire to start to heat and re-radiate longwave infrared radiation which then heats the ambience. So there is that this lag between photograph voltaic insolation and heating. wish this permits a sprint.

Answer 3

GREAT QUESTION!!
I'll tell you. At -1 degrees Fahrenheit, below freezing point, the frost and frozen dew gets deposited on various items like cars, leaves, etc. As the sun rises, first, this frost vaporizes into water-vapor and enters the atmosphere. This water-vapor absorbs the radiations radiating from the earth's surface, thus making the atmosphere temporarily cooler. Then, the sunlight starts gradually heating up the earth and subsequently the atmosphere.
I hope you understand.

Answer 4

Here is a guess. The temperature of the air nearest the ground (and where your thermometer is located) is a little warmer that the air above it. The sun warms the earth at dawn and circulating currents lift that air up and bring the colder air down.

Answer 5

possible ., if the humidity is high as energy is spent, while calories are used by moisture air laden air