Abstract
RECENT communications1,2 have directed attention to the importance to the biologist of the peculiar microclimate on the ground and among ground vegetation. A thin hot layer of air covers the surface of bare earth in sunshine, and among vegetation it is lifted to a height which depends upon the height and density of the vegetation. Measurement of the temperature of this air is difficult: the temperatureprofile is steep and is likely to be disturbed by the ventilation of an aspiration thermometer. When using an aspiration thermocouple over bare earth, I have found that the galvanometer reading rises initially to a high value and then falls, suggesting that hot air is being withdrawn and replaced by colder.
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References
Champness, S. S., Nature, 165, 325 (1950).
Waterhouse, F. L., Nature, 166, 232 (1950).
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PARRY, D. Microclimate Close to the Ground. Nature 167, 73–74 (1951). https://doi.org/10.1038/167073b0
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DOI: https://doi.org/10.1038/167073b0
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