“…In addition, the application of bomb 14 C in various other research disciplines has grown significantly in the last 2 decades. In particular, atmospheric bomb 14 C has been used in forensic studies (Wild et al 1998;Zoppi et al 2004;Nakamura et al 2007;Buchholz and Spalding 2010;Alkass et al 2011;Ubelaker and Parra 2011;Ehleringer et al 2012), in biomedical research (Spalding et al 2005(Spalding et al , 2008Bhardwaj et al 2006;Lynnerup et al 2008), and in soil carbon studies (Quideau et al 2000;Bruun et al 2005;Koarashi et al 2009;Trumbore 2009;Rabbi et al 2013), to build reliable chronologies for recent terrestrial archives and materials (Hua 2009;English et al 2010;Hodge et al 2011;Clarke et al 2012;Hua et al 2012a), to validate tree-ring ages (Fichtler et al 2003;Vieira et al 2005;Bowman et al 2011;Pearson et al 2011), to date recent trees having no annual growth rings (Worbes and Junk 1989;Poussart and Schrag 2005;Lovelock et al 2010), and to determine biogenic and fossil fractions of industrial CO 2 emissions (Mohn et al 2008(Mohn et al , 2012Felner and Rechberger 2009;Palstra and Meijer 2010). This paper presents a new compilation of tropospheric 14 CO 2 (or tropospheric 14 C in short) for the last 60 yr , covering a short interval before the onset of bomb 14 C in the mid-1950s, the bomb-peak period during the 1960s, and the post-bomb era up to very recent time.…”