They are called meteorologists; but also exist specialties as physics of the atmosphere, chemistry of the atmosphere.
Meteorologist
That person is called a 'meteorologist'
a person who studies people but not an psychologist
a person who studies people but not an psychologist
An Anthropologist.
Geography and social studies
It is called the audiologist.
you would call someone who studies economic zoology a Zoologist.
Botanist / herbologist studies plants, people who cultivate cannabis are considered growers
a person who studies insects is called an entomologist.
the people who studies a volcanoes is a volcanologists
Meteorologist