A New Formula for the Rain Dew Point III

In paper I in this series, the author derived the following equation for rain dew point [1].

To–T=(3kTo2/σoao)(P*H2O/Pair)

This equation has its origin in the author’s research in 2012 [2]. The author applied it to rain drops in another paper [3]. Then it was simplified by using Lord Kelvin’s equation for rising vapor pressure through curvature of the surface [4, 5]. In this paper new tables, more complete than the one in paper II, [6] will be presented for To=0°C, -10°C and -22.5°C as the starting temperature of the rain cloud. Values for σo and P*H2O (surface tension of the water droplet, vapor pressure of the water droplet) for those temperatures have been obtained from the literature [7, 8]. The values for T, the undercooling temperature for the rain cloud, will be in the new tables. Water can only be supercooled to about -40°C, so we are only taking this down to -22.5°C for the starting To. The calculations will be presented in RESULTS.