Abstract
New measurements have been made of anomalous i.r. absorption in moist air using a White cell and optical path lengths of 56.4 and 94.0 m. Simultaneous measurements were made of the ion content of the moist air, which was humidified by boiling water in a recirculating system. Data are presented for absorption cross section, self-broadening coefficient and ion content as functions of humidity. The results show that the i.r. absorption is proportional to the ion content of moist air, and that the observed behavior is consistent with the theory that ions are formed by the dissociation of huge populations of large neutral clusters that are formed by evaporation and that are responsible for much of the i.r. continuum absorption. Other theoretical aspects and projected work are discussed briefly.
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