Finding Ground Temps. for Long Island New York 4' and 8'

Brad White_9

In the inter-frost zone, probably from surface to a depth of 3-4 feet (where ever frostline is in a given area) you will have the full gradient from "ambient to constant" in summer and similar in winter except the inter-frost temperature tends to remain closer to surface temperature. Dang that is hard! But your point is taken, the upper crust (so to speak) varies. My point remains, what lies beneath is reasonably constant year-round.

If you see the attached PDF previously posted, they extrapolate a rise in temperature of 1.5 degrees for each 100 feet of depth.

KEVIN HEINRICH

GROUND TEMPS. LONG ISLAND NY 4' AND 8'

Were would I be able to find ground temp data for Long Island NY.(WE ARE VERY CLOSE TO WATER TABLES HOW IS THE EFFECT OF THAT FIGURED OUT)

Brad White_81

The attached USAF Weather Data

for Islip/MacArthur has a 50-foot groundwater temperature of 54.9 degrees. Granted this is further down than you are thinking. Rule of thumb is that the ground temperature below frostline closely matches the average annual temperature for the area.

jp_2

ground, cold in summer,warm in winter

as I understand, ground temps are 180 degree out of phase with outside temps.

which would make sense, takes all summer to warm up, then all winter to cool down.

this relates to deeper soil, not close to surface.

but if you have high water table, my guess would be the ground matches water temp of course.

what is the code on footing depth there?

Brad White_9

Actually

the temperatures are relative in that the ground temperature is fairly constant, usually within a few degrees if that much. As a result the differnces seem out of phase but only that the atmosphere above is so volatile. You can see how they average out in the heat sink known as earth.

jp_2

well sort of brad,

as is understandable, it all has to do with climate and depth.

when talking about this we really need to clarify what sort of depth we are talking about, 2ft, 8ft 12ft or 1,000ft?

what happens at 2 ft in a winter climate area is not equateable to whats happening at 10 ft, so as its often said, "it depend".

i agree the temps are constant, but at what depth? I've always wonder that?

jp_2

oopps

i missed your last sentense in the first post.....i agree too