. 2009 Oct 23;76(1):23–29. doi: 10.1128/AEM.01127-09

TABLE 2.

Chemical composition and pH of the artificial cloud water solution that mimics the natural cloud water collected at the puy de Dôme station between 2001 and 2008^a

Compound or parameter	Concn (μM)
	Artificial cloud	Natural cloud water
	Artificial cloud	Min	Max
Acetate	20	0.31	47.8
Formate	14.5	0.25	69.8
Succinate	1.5	0.02	4.1
Oxalate	3	0.10	16.9
Cl⁻	320	0.49	1,948.9
NO₃⁻	200	0.80	766.7
SO₄²⁻	50	1.94	369.5
Na⁺	251	0.37	678.5
NH₄⁺	200	6.28	1,801.7
K⁺	10	0.13	124.1
Mg²⁺	10	0.03	47.9
Ca²⁺	40	0.30	74.8
pH	5-5.3	3.9	7.6

Data are from references 35 and 38 and Parazols et al. (unpublished). Concentrations of the solution used as the incubation medium for microcosm experiments were 10 times more than those of the artificial cloud.