Meteorologists can chart the points where temperatures and humidities intersect to let a cloud form.
The humidities over the Southern Hemisphere in July indicate the humidities that comparable regions in the Northern Hemisphere will attain in January, just as July in the Northern Hemisphere suggests the humidities in the Southern Hemisphere during January.
Because of the high temperatures, however, relative humidities are very low.
"So the snowflake that you see on the ground is deeply affected by the different temperatures, humidities, velocities, turbulences, etc, that it has experienced on the way".
By the time we arrived on the scene, they'd been sitting here for years, exposed to the unforgiving humidities and temperatures of the St . Louisseasons.
The presence of cloud condensation and ice nuclei in air parcels is tested by using cloud chambers in which controlled temperatures and relative humidities are specified.
Such particles, called condensation nuclei, collect water because of their hygroscopic nature and, at relative humidities above about 80 percent, exist as solution droplets.
A. Your breath can mix with the outside air to form the visible mist that meteorologists call a mixing cloud at a fairly broad range of temperatures and humidities, said Jeff Warner, a meteorologist at Pennsylvania State University.
Average relative humidities range from nearly 100 percent in the south to 65 percent in the north, although, during the harmattan season, figures as low as 12 percent have been recorded in the north and around Accra.
In the absence of such aerosols, the spontaneous conversion of water vapour into liquid water or ice crystals requires conditions with relative humidities much greater than 100 percent, with respect to a flat surface of H2O.
The direct measurement of vapour fluxes is an extremely intricate proposition, as motions over a water surface are usually turbulent, and instruments capable of measuring rapidly changing vertical motions and humidities are required.
