Table 4.

Photosynthetic efficiency and dissolved trace metals across the Drake Passage and the Western Antarctic Peninsula.

	Latitude	Longitude	dFe	dMn	dFe:dMn	Fv/Fm
	min−1	min−1	nM	nM	nM:nM	rel.unit
PS97
Station #1	60° 01.08′ S	65° 41.63′ W	2.88	0.36	8.0	0.17 ± 0.02
Station #2	60° 44.73′ S	65° 2.00' W	nd	1.52	nd	0.27 ± 0.01
Station #3	62° 29.90′ S	64° 17.66′ W	0.50	0.39	1.28	0.21 ± 0.02
Station #4	62° 35.03′ S	59° 41.33′ W	4.51	6.92	0.65	0.53 ± 0.03
Station #5	62° 26.57′ S	59° 12.24′ W	2.93	5.46	0.54	0.52 ± 0.02
Station #6	62° 25.32′ S	58° 29.35′ W	1.53	1.53	1	0.43 ± 0.04
Station #7	61° 49.53′ S	55° 39.02′ W	0.89	1.27	0.7	0.45 ± 0.01
Station #8	60° 29.94′ S	55° 29.70′ W	2.99	1.21	2.4	0.36 ± 0.02
Station #9	58° 5.01′ S	66° 3.00′ W	3.21	0.31	10.3	0.12 ± 0.03
PS112
Station #10	62° 45.60′ S	59° 00.42′ W	1.85	2.51	0.74	0.56 ± 0.01
Station #11	63° 00.00′ S	60° 30.00′ W	3.76	2.62	1.43	0.36 ± 0.01
Station #12	62° 53.16′ S	60° 14.32′ W	2.42	3.05	0.79	0.52 ± 0.03
Station #13	62° 14.23′ S	64° 33.41′ W	4.44	0.08	55.5	0.19 ± 0.02
Station #14	61° 45.08′ S	62° 00.49′ W	1.31	0.42	3.12	0.31 ± 0.01
Station #15	61° 01.33′ S	54° 47.30′ W	3.09	3.21	0.96	0.32 ± 0.01
Station #16	60° 41.80′ S	54° 34.24′ W	0.29	0.98	0.29	0.35 ± 0.01
Station #17	63° 38.78′ S	56° 29.57′ W	3.13	3.60	0.87	0.21 ± 0.01
Station #18	61° 59.25′ S	53° 59.37′ W	1.92	1.85	1.04	0.39 ± 0.01
Station #19	60° 57.51′ S	54° 44.69′ W	1.31	2.18	0.61	0.41 ± nd
Station #20	58° 35.64′ S	58° 61.37′ W	0.06	0.11	0.54	0.12 ± 0.01

Concentrations of total dissolved iron (dFe), dissolved manganese (dMn) and the 1h-dark-adapted maximum photosystem II quantum yield (F_v/F_m) were determined for 20 in situ stations sampled during the Polarstern expeditions PS97 and PS112 using GoFlo bottles. Values represent the mean ± SD (n = 3). nd denotes not determined.