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For any reasonable depth (ie. something you'd be willing to dig without specialized machinery), a deeper hole makes for a more stable temperature. The extra mass of soil surrounding your cellar acts to average out temperature changes: shallow burial averages out day-night shifts, while deeper averages out seasonal changes as well. The end result is that a ...


3

No, it is not true that the deeper you get the cooler it gets. It is actually the opposite, the deeper you get the warmer the temperature gets. This is called the Geothermal Gradient. This states that temperature goes up 25C per 1KM of depth. For the first couple of meters the temperature will likely drop or raise (depending on the above ground temp) ...


2

Because water evaporates at any temperature over 32 DegF, a swamp cooler or evaporative cooler is possible in any climate that needs cooling (though perhaps not in a powerful enough fashion depending on the cooling required). In a still body of water, the evaporation rate is proportional (in some form) to the humidity of the air, the air temperature, the dew ...



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