What kind of literary technique of atmosphere is in the novel David Copperfield?

according to:http://www.mc3.edu/aa/lal/workshops/LiteraryDefinitions.html literary atmosphere is the mood pervading a literary work, particularly created by the setting; helps establish the expectations and attitude of the reader. I am currently reading "David Copperfield" for school and I needed to describe the literary atmosphere, which is how I found this question. I would descibe the atmosphere as early life in Britain, showing the life of a posthumus boy who grew up with a bitter nanny, a loving mother, and an abusive stepfather. If autobiography is part of the atmosphere, I do not know. Vague as I was, I hope this helps someone!!