Abstract
WHILE the subject of cyclones is being discussed in NATURE, I should like to direct attention to a point which I have already treated in a paper read before the Royal Society of Edinburgh in January, 1916. It is there pointed out that though the core of a cyclone is colder than the core of an anticyclone or than the surrounding air, yet the air in the cyclone is lighter than that in the anticyclone. This decrease in density is due to the air being under a lower pressure. It is shown that the lower pressure in cyclones more than compensates for their lower temperature, so that though the air in cyclones is colder, yet it is lighter than the surrounding air, and tends to ascend in the troposphere as well as in the stratosphere.
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AITKEN, J. Cyclones. Nature 102, 425 (1919). https://doi.org/10.1038/102425b0
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DOI: https://doi.org/10.1038/102425b0