A before-and-after snapshot of mood expressed about weather when a massive tornado hit Joplin Missouri. Dark orange colors indicate negative mood. Dark green represents positive mood. For those tweeting about the weather, mood shifted decidedly the day after the tornado struck.
Pulse is a set of analytical tools we are developing to track the ebb and flow of online conversations geographically. We extract and filter relevant content, add in rules for interpreting the expressed sentiment, and then pass jobs off to crowd-based workers to make judgments of sentiment. Pulse will enable us to identify key opportunities for introducing multimedia content into the dialogue.
Interest in the day's weather is widespread, with spirits dropping for many on gray, rainy days, and spirits soaring on sunny days. But, weather mood can be nuanced, with moods darkening when too much sun brings drought or a trace of snow causes a commuting mess in cities not accustomed to snow. Conversely, moods can turn upbeat when rain finally arrives in a parched area. Lots of people make comments about the weather on Twitter, though teasing out their mood is non trivial and currently requires an innovative approach based in crowdsourcing. This is the first comprehensive study of people's mood about the weather across the U.S. More »