Measurement report: Black carbon properties and concentrations in southern Sweden urban and rural air – the importance of long-range transport oleh E. Ahlberg, S. Ausmeel, S. Ausmeel, L. Nilsson, M. Spanne, J. Pauraite, J. Klenø Nøjgaard, J. Klenø Nøjgaard, M. Bertò, H. Skov, P. Roldin, A. Kristensson, E. Swietlicki, A. Eriksson