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Name: Hilary
Status: Student
Grade: 6-8
Location: FL 
Country: United States
Date: February 2007


Question:
Is there a difference in the lag in daily temperature experienced over land compare to the daily temperature lag over water?



Replies:
Hilary,

The air temperature lag over water would be greater than over land, assuming that the air temperature over the water is not influenced by the air temperature from land nearby.

Solar radiation penetrates deeply into water, only raising the surface water temperature slightly (and therefore raising the air temperature only slightly) during the day. The highest air temperature over water should occur later in the afternoon than the high temperature over land.

David R. Cook
Meteorologist
Climate Research Section
Environmental Science Division
Argonne National Laboratory



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