This essay explains the mechanics of the North Atlantic Oscillation (NAO). The NAO can be defined most simply as the relationship between the center of low atmospheric pressure over Iceland and the center of high pressure above the Azores. It is the interaction between these systems that directs the flow of air and causes persistent weather patterns. The writer states that a common goal of the recent work on the NAO is to analyze past events to determine if our current positive trend is being goaded by an outside influence namely, global warming. The site features an interactive graph that relates the oscillation to historical events. It also has links to other essays, a video, an interactive map, and outside sources for more information about NAO.
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