PISTON

The Propagation of Intra-Seasonal Tropical OscillatioN (PISTON) was conducted in the August-October 2018 period over the northern Western Pacific tropical region. While numerous tropical intra-seasonal oscillations exist, PISTON primarily targeted the Boreal Summer Intraseasonal Oscillation (BSISO). The BSISO defines the northward and eastward movement of the Asian monsoon during northern-hemispheric (boreal) summertime. This oscillation has been observed to impact weather across the Maritime Continent and into the southeastern portions of continental Asia, and even weather within the United States. The BSISO is rather complex, and PISTON is therefore an extensive field campaign, involving both intensive numerical modeling and observational activities.