The atmosphere of a poem has to do with the tone and mood that it creates. The tone of a poem refers to the attitude or perspective of the speaker towards the subject matter, while the mood refers to the emotions or feelings that the poem evokes in the reader. The atmosphere, therefore, is the overall feeling or impression that the poem creates in the reader.
The atmosphere can be created through various poetic devices, such as imagery, figurative language, and syntax. The time and place of the poem can also contribute to the atmosphere, but they are not the only factors. For example, a poem set in a beautiful garden may have a peaceful and serene atmosphere, but the same garden could be described in a way that creates a dark or eerie atmosphere. Therefore, while the time and place can influence the atmosphere, it is the tone and mood that are the most significant factors in creating the atmosphere of a poem.