[dd, decimal degrees; ft, feet above the North American Vertical Datum of 1988; OB, bulk deposition from E or VWM; E, depth-integrated depth-integrated environmental;																									
VWM, volume-weighted mean of two snowpack layers; ANC, acid neutralization capacity; ueq/L, microequivalents per liter;																									
uS/cm, microsiemens per centimeter; SC, specific conductance at 25degC; pH values in standard units; H, hydrogen; Ca, calcium;																									
Mg, magnesium; Na, sodium; K, potassium;  NH4, ammonium; Cl, chloride; SO4, sulfate; NO3, nitrate; DOC, dissolved organic carbon;																									
mg/L, milligrams per liter; SWE, snow-water equivalent;  cm, centimeters; d34S, stable-sulfur isotope ratio (34S/32S); Hg, mercury;																									
ng/L, nanograms per liter; NA or empty cell indicates not analyzed; <, below reporting limits; M, presence verified but not quantified; %, percent																									
missing year indicates no sample collected or sample results reviewed and rejected																									
Roth 1994: Mercury in water by CVAFD with potassium dichromate preservation																									
USEPA Method 1631, Rev E: Mercury in water by Oxidation, Purge and Trap, and CVAFS]																									
																									
Station ID	451638111255900																								
Site Name	BIG SKY, MT																								
Latitude (dd)	45.2772222																								
Longitude (dd)	-111.4330556																								
Elevation (ft)	9092																								
SiteNumber	StationName	SampleDate	WaterYear	SampleType	ANC (ueq/L)	SC (uS/cm)	pH	H (ueq/L)	Ca (ueq/L)	Mg (ueq/L)	Na (ueq/L)	K (ueq/L)	NH4 (ueq/L)	Cl (ueq/L)	SO4 (ueq/L)	NO3 (ueq/L)	DOC (mg/L)	Total N (mg/L)	Total Dissolved N (mg/L)	Hg (ng/L) Roth 1994	Hg (ng/L) USEPA 1631	d34S (per mil)	SWE (cm)	Snow Depth (cm)	Ionic Balance (%)
451638111255900	BIG SKY, MT	1993-04-06	1993	OB		4	5.4	4	5.1	<1.7	4.3	0.5	5.4	1.1	6.7	7.6	0.5					4.1	38	137	11.2
451638111255900	BIG SKY, MT	1994-03-25	1994	OB	0	4	5.8	1.6	8.1	<1.7	4.8	0.8	6	1.7	7.3	6.9	0.7					7.3		173	14.5
451638111255900	BIG SKY, MT	1995-03-19	1995	OB	0	3	5.4	4	4.5	<1.7	<3	0.5	4.4	<1.1	4.2	5.1	0.7					5		196	18.1
451638111255900	BIG SKY, MT	1996-03-18	1996	OB	0	2	5.6	2.5	4.3	<1.7	<0.9	1.3	2.3	<1.1	3.3	5.2	0.5					6.3		257	10.1
451638111255900	BIG SKY, MT	1997-03-20	1997	OB	-4	2	5.4	4	<3.1	<1.7		<0.5	2.4	<1.1	2.1	3.4	0.6					5.9		188	7.6
451638111255900	BIG SKY, MT	1998-03-18	1998	OB	-6	3	5.2	6.3	3.5	<1.7		<0.5	3.7	<1.1	3.5	5.4	0.7					6.1		127	20.5
451638111255900	BIG SKY, MT	1999-03-17	1999	OB	-3.6	3	5.5	3.2	5.5	<1.7	<0.9	<0.5	4.2	1.4	3.3	5.4	0.3					5.8		239	12.2
451638111255900	BIG SKY, MT	2000-03-15	2000	OB	3.8	3	5.5	3.2	5	<1.7	<0.9	0.8	4	<1.1	2.5	4.1	0.6							119	43.6
451638111255900	BIG SKY, MT	2001-03-17	2001	OB	-3	4	5.4	4	4	<1.7	<0.9	0.5	4.2	<1.1	4.4	6.4	0.5					5.6		124	8.1
451638111255900	BIG SKY, MT	2002-03-17	2002	OB	-2.4	3	5.5	3.2	5	<1.7	<0.9	0.5	4.5	<1.1	2.9	5	0.6			2			38	119	25.1
451638111255900	BIG SKY, MT	2003-03-18	2003	OB	2.8	3	5.7	2	9.5	2.5	4.8	0.8	4.7	3.1	3.7	5	0.5			1.8			56	178	39.3
451638111255900	BIG SKY, MT	2004-03-17	2004	OB	-4.6	3	5.4	4	<3.1	<1.7	<0.9	<0.5	3	<1.1	2.9	4.3	0.3			0.9			23	76	-1.4
451638111255900	BIG SKY, MT	2005-03-09	2005	OB	1.8	4	5.5	3.2	9	<1.7	<0.9	0.8	4.7	2.5	3.1	5.7	0.3			1.7			18	58	26.6
451638111255900	BIG SKY, MT	2006-03-08	2006	OB	4	4.1	5.9	1.3	7	1.6	3.5	0.8	5.7	3.4	5	5	0.51						41	150	28.2
451638111255900	BIG SKY, MT	2007-03-07	2007	OB	1.2	3.2	5.6	2.5	4.5	0.8	<0.9	0.5	3.7	0.8	2.7	3.6	0.37					3.9	32	114	30
451638111255900	BIG SKY, MT	2008-03-05	2008	OB	6	4	5.9	1.3	13.5	1.6	1.3	0.8	8	1.1	5.2	7.1	0.5						41	150	41.6
451638111255900	BIG SKY, MT	2009-03-04	2009	OB	-0.4	2.8	5.7	2	4.5	0.8	2.2	0.8	4.2	0.8	2.7	5	0.77				2.92		31	102	26.1
451638111255900	BIG SKY, MT	2010-03-10	2010	OB	-2.6	3.9	5.5	3.2	5.5	1.6	2.6	2.3	4.8	3.1	3.7	6.4	0.59				2.07		51	165	20.5
451638111255900	BIG SKY, MT	2011-03-09	2011	OB	4.2	3.3	5.8	1.6	8	1.6	5.2	0.8	3.4	4.2	3.5	4.3	0.66				1.84		83	264	34.8
451638111255900	BIG SKY, MT	2012-03-07	2012	OB	-2	3	5.1	7.9	6.5	<1.6	1.3	0.8	6.2	1.4	2.5	3	0.4	0.13			2.46		82	249	53.4
451638111255900	BIG SKY, MT	2013-03-06	2013	OB	-8	3	5.4	4	8.5	<1.6	2.6	0.5	6.4	3.1	3.1	5.7	0.5	0.16			1.99		49	147	29.8
451638111255900	BIG SKY, MT	2014-03-05	2014	OB	6.2	3	6	1	7	1.6	4.3	0.5	3.2	4.2	2.3	3.4	0.35	0.1	0.12				78	259	41.2
451638111255900	BIG SKY, MT	2015-03-11	2015	OB	4	3.1	5.8	1.6	8	1.6	5.2	0.8	4.4	2.5	4.6	3.6	0.57	0.1			4.09		105	147	41
451638111255900	BIG SKY, MT	2016-03-08	2016	OB	1	2.3	5.6	2.5	4	0.8	1.3	0.5	4.8	<0.6	1.9	3.6	0.42	0.15			2.24		40	130	46.1