Fig. 4. (a) Ranges of δ13CTC in PM2.5 collected on day- and night-time bases in summer and winter in Tianjin, North China (aThis study) together with those in the particles emitted from specific origins (bWidory et al., (2004)40; cGleason and Kyser, (1984)39; dMartinelli et al., (2002)36). (b) Scatter plots between δ13CTC and TC and WSOC in summer and winter.
