Meteorological conditions deviate from the average climatological conditions, more or less.
Condition generally are not in the focus of citizen’s interest until some extreme event occurs. Then the print
and digital media are full of reports about the consequences of the storm. Citizens of all professions become
active participants and express their observations and opinions with their comments. On the one hand, this is
good, but on the other, the comments often confuse public opinion, and in some cases even disturb. The
reason is that most analysts and commentators do not have proper professional education and therefore do not
understand meteorological processes sufficiently. As a consequence, the comments make assumptions, even
claims, that episodes of extreme meteorological phenomena are the result of considerable, deliberate human
action (conspiracy). Many comments refer to contrails, which are claimed to be chemtrails as part of a secret
dusting program. The claim is based on the presentation of images, films and opinions without sufficient
evidence. These specific "records in the sky" are indeed the result of human action, and they were created by
known chemical and meteorological processes. They have been known since before the Second World War.
In the Cloud Atlas they are classified as Cirrus homogenitus and Cirrus homomutatus. By burning aircraft fuel
(hydrocarbons), hydrogen and carbon are produced, and their chemical reaction with oxygen produces carbon
dioxide and a molecule of water vapor. The water vapor molecule further binds to the nucleus, which consists
mainly of solid particles of jet fuel combustion. Due to the very low temperature at the height of the plane's
flight, the microscopic droplet almost immediately changes to a solid state (crystal) and becomes visible. The
retention and movement of aircraft trails (clouds) depends on a number of thermodynamic properties of the
atmosphere. High pressure, low humidity and downward air flow cause rapid disappearance, and low
pressure, high humidity and upward flow cause long-term retention of traces. High wind speed carries the
tracks in the direction of the wind. In addition to the condensation trails of the aircraft, citizens are also
suspicious of "strange-looking clouds", and those rare cloud forms have also long been observed, classified
and recorded in the Cloud Atlas.
