Simmons, A., Fellous, J.-L., Ramaswamy, V., Trenberth, K., Asrar, G., Balmaseda, M., Burrows, J. P., Ciais, P., Drinkwater, M., Friedlingstein, P., Gobron, N., Guilyardi, E., Halpern, D., Heimann, M., Johannessen, J., Levelt, P. F., Lopez-Baeza, E., Penner, J., Scholes, R., & Shepherd, T. (2016). Observation and integrated Earth-system science: A roadmap for 2016–2025. Advances in Space Research, 57(10), 2037-2103. doi:10.1016/j.asr.2016.03.008.