Table 1. Summary of the tropospheric ¹⁴CO₂ sampling sites

Site code	Site	Country	Agency	Latitude	Longitude	Elevation	Period of record
V	Kapp Linné	Norway	Telegrafstyret	78 04' N	1338' E	10 m	1963-64
F	Fruholmen	Norway	Fruholmen lighthouse	7106' N	2359' E	70 m	1962-93
K	Gråkallen	Norway	Norwegian Institute of Technology	6325' N	1015' E	450 m	1962
Kv	Vassfjellet	Norway	Norwegian Institute of Technology	6316' N	1022' E	700 m	1962-63
L	Lindesnes	Norway	Lindesnes lighthouse	5759 'N	0704' E	50 m	1963-64
S	Santiago de Compostela	Spain	Local airport	4253' N	0826' W	360 m	1963-66
IZ	Izaña	Spain	Observatorio Astronomica, Izaña	2822' N	1630' W	2400 m	1963-67, 1976-90
M	Mas Palomas	Spain	NASA	2745' N	1540' W	10-100 m	1963-73
R	Rehovot	Israel	Weismann Institue of Science	3150' N	3450' E	100 m	1967-68
D	Dakar	Senegal	University of Dakar-Fann	1433' N	1707' W	10 m	1963-64
DF	Dakar-Fann	Senegal	University of Dakar-Fann	1441' N	1728' W	25 m	1964-68
TC	N'Djamena	Chad	ORSTOM de Fort-Lamy	1208' N	1457' E	300 m	1966-76
E	Debre Zeit	Ethiopia	Ethiopian Evangelical College	840' N	3858' E	1900 m	1963-69
G	Fianarantsoa	Madagascar	Missionary station	2127' S	4705' E	1100 m	1964-78