“…10 In this sense, atmospheres provide one answer to the task that Hutchison and Bleiker (2014) pose as a key challenge to IR emotions research, that is, to theorize how individual emotions become collective and political. The IR emotions literature has developed a range of useful perspectives for thinking about collective emotions, from intergroup emotion theory (Sasley, 2011), to circulations of affect (Ross, 2014;Solomon, 2014), structures of feeling (Koschut, 2017;Van Rythoven, 2021), the institutionalization of emotions (Crawford, 2014), affective communities (Hutchison, 2016), and neuroscience (Gammon, 2020;Holmes, 2018), to name a few. Other recent work has begun to explore what might be called the "atmospheric" aspects of emotional experience, such as the "sensing" of threats at border controls (Gregory, 2019), "situational awareness" of danger during urban terrorism (Krasmann and Hentschel, 2019), the role of sound in security politics (Weitzel, 2018), and circulations of rumors in conflict zones (McGahern, 2016).…”