Add the intense rush of exploration and the thrill of discovery to stunning concert experiences and you get Green Umbrella, the Los Angeles Philharmonic at its most daring. This season, the acclaimed new-music series includes the world premieres of Annie Gosfield’s War of the Worlds and Ted Hearne’s opera Place. Conductors include Gustavo Dudamel, John Adams, Susanna Mälkki, Carlos Miguel Prieto, and Christopher Rountree.