Tetrachloroethylene as an indicator of extremely low Cl atom concentrations in the troposphere

Singh, H.B., A.N. Thakur, Y.E. Chen, and M. Kanakidou (1996), Tetrachloroethylene as an indicator of extremely low Cl atom concentrations in the troposphere, Geophys. Res. Lett., 23, 1529-1533.