Observation and integrated Earth-system science: A roadmap for 2016-2025

Adrian Simmons^*, Jean Louis Fellous, Venkatachalam Ramaswamy, Kevin Trenberth, Ghassem Asrar, Magdalena Balmaseda, John P. Burrows, Philippe Ciais, Mark Drinkwater, Pierre Friedlingstein, Nadine Gobron, Eric Guilyardi, David Halpern, Martin Heimann, Johnny Johannessen, Pieternel F. Levelt, Ernesto Lopez-Baeza, Joyce Penner, Robert Scholes, Ted Shepherd