/* DATA DESCRIPTION:
Citation:	Asmala, Eero; Österholm, Peter; Virtasalo, Joonas J (2023): Water quality and geochemical data from Laihianjoki and Sulvanjoki flocculation experiments in April 2021 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.961684, 
	In: Asmala, E et al. (2023): Suspension particle size, water quality and geochemical data from Laihianjoki and Sulvanjoki flocculation experiments in April 2021 [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.961683
Abstract:	Water samples were collected from the Laihianjoki and Sulvanjoki rivers in April 2021, using a bucket and transferred to 30 L acid-washed containers. The sampling was conducted during springtime, a few weeks after the peak flow caused by snow smelt. The collected river waters were immediately analyzed for pH, temperature, electrical conductivity, and salinity using a WTW Multiline P4 meter. The samples were then transported to the Tvärminne field station of the University of Helsinki, where laboratory experiments began within 24 hours.
	A large-volume bucket experiment was conducted to study the dynamics of suspended particle size distribution and associated nutrients during the transition from fresh to brackish water conditions. Artificial seawater with salinity of 66.8 g kg-1 was added to river water in an acid-washed basin, while changes in water chemistry and particle size distribution were continuously monitored using a multiparameter water quality sonde and a laser-diffraction particle size analyzer. Additionally, small-volume jar experiments were performed to collect particle samples under controlled conditions using a flocculator apparatus. The collected material was analyzed, and the filtrate was used for further analysis of colored dissolved organic matter.
	Triplicate samples from flocculator experiments were acidified and analyzed for metal concentrations using an inductively coupled plasma optical emission spectrometer (ICP-OES) and an inductively coupled plasma mass spectrometer (ICP-MS). Filtrate samples were measured for colored dissolved organic matter (CDOM) absorbance and fluorescence using a spectrophotometer and a spectrofluorometer, respectively. Particulate organic carbon (POC) and particulate organic-bound metals were analyzed in filter retentate samples using a mass spectrometer and ICP-MS. Total suspended matter (TSM) was determined by filtering and weighing samples. The apparent particle density was calculated by dividing TSM by volumetric concentrations measured by a laser-diffraction particle size analyzer. However, the density results are biased as particles larger than the detection limit of the instrument are not included in the analysis.
Keyword(s):	acid sulphate soils; Baltic Sea; estuaries; Flocculation; Laboratory experiment; Salinity; trace metals
Coverage:	MEDIAN LATITUDE: 63.038500 * MEDIAN LONGITUDE: 21.682500 * SOUTH-BOUND LATITUDE: 63.034000 * WEST-BOUND LONGITUDE: 21.660000 * NORTH-BOUND LATITUDE: 63.043000 * EAST-BOUND LONGITUDE: 21.705000
	DATE/TIME START: 2021-04-13T00:00:00 * DATE/TIME END: 2021-04-13T00:00:00
Event(s):	Laihianjoki_water * LATITUDE: 63.043000 * LONGITUDE: 21.705000 * DATE/TIME: 2021-04-13T00:00:00 * LOCATION: Finland * METHOD/DEVICE: Water sample (WS)
	Sulvanjoki_water * LATITUDE: 63.034000 * LONGITUDE: 21.660000 * DATE/TIME: 2021-04-13T00:00:00 * LOCATION: Finland * METHOD/DEVICE: Water sample (WS)
Parameter(s):	Type of study (Study type) * PI: Asmala, Eero (https://orcid.org/0000-0002-9150-1227, eero.asmala@gtk.fi)
	Event label (Event) * PI: Asmala, Eero (https://orcid.org/0000-0002-9150-1227, eero.asmala@gtk.fi)
	LATITUDE (Latitude) * GEOCODE * PI: Asmala, Eero (https://orcid.org/0000-0002-9150-1227, eero.asmala@gtk.fi)
	LONGITUDE (Longitude) * GEOCODE * PI: Asmala, Eero (https://orcid.org/0000-0002-9150-1227, eero.asmala@gtk.fi)
	Date/time analysis, experiment (Date/time analysis exp) * PI: Asmala, Eero (https://orcid.org/0000-0002-9150-1227, eero.asmala@gtk.fi)
	Salinity, absolute [g/kg] (ASAL) * PI: Asmala, Eero (https://orcid.org/0000-0002-9150-1227, eero.asmala@gtk.fi) * METHOD/DEVICE: Multiparameter probe, YSI Xylem Inc., EXO2 (URI: https://www.ysi.com/exo2)
	Conductivity, specific [µS/cm] (Cond) * PI: Asmala, Eero (https://orcid.org/0000-0002-9150-1227, eero.asmala@gtk.fi) * METHOD/DEVICE: Multiparameter probe, YSI Xylem Inc., EXO2 (URI: https://www.ysi.com/exo2)
	Replicate (Repl) * PI: Asmala, Eero (https://orcid.org/0000-0002-9150-1227, eero.asmala@gtk.fi)
	Carbon, organic, particulate [mg/l] (POC) * PI: Asmala, Eero (https://orcid.org/0000-0002-9150-1227, eero.asmala@gtk.fi) * METHOD/DEVICE: Mass spectrometer, Europa Scientific ANCA-MS 20-20 15N/13C
	Suspended particulate matter [mg/l] (SPM) * PI: Asmala, Eero (https://orcid.org/0000-0002-9150-1227, eero.asmala@gtk.fi) * METHOD/DEVICE: Derived from filter weights
	Aluminium, particulate [µg/l] (Al part) * PI: Asmala, Eero (https://orcid.org/0000-0002-9150-1227, eero.asmala@gtk.fi) * METHOD/DEVICE: Inductively coupled plasma–optical emission spectrometer (ICP-OES), Thermo Fisher Scientific Inc., iCAP 7400
	Cobalt, particulate [µg/l] (Co part) * PI: Asmala, Eero (https://orcid.org/0000-0002-9150-1227, eero.asmala@gtk.fi) * METHOD/DEVICE: Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP Q
	Copper, particulate [µg/l] (Cu part) * PI: Asmala, Eero (https://orcid.org/0000-0002-9150-1227, eero.asmala@gtk.fi) * METHOD/DEVICE: Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP Q
	Iron, particulate [µg/l] (Fe part) * PI: Asmala, Eero (https://orcid.org/0000-0002-9150-1227, eero.asmala@gtk.fi) * METHOD/DEVICE: Inductively coupled plasma–optical emission spectrometer (ICP-OES), Thermo Fisher Scientific Inc., iCAP 7400
	Manganese, particulate [µg/l] (Mn part) * PI: Asmala, Eero (https://orcid.org/0000-0002-9150-1227, eero.asmala@gtk.fi) * METHOD/DEVICE: Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP Q
License:	Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/)
Status:	Curation Level: Enhanced curation (URI: https://wiki.pangaea.de/wiki/Curation_levels)
Size:	432 data points
*/
Study type	Event	Latitude	Longitude	Date/time analysis exp	ASAL [g/kg]	Cond [µS/cm]	Repl	POC [mg/l]	SPM [mg/l]	Al part [µg/l]	Co part [µg/l]	Cu part [µg/l]	Fe part [µg/l]	Mn part [µg/l]
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	0.0	248	A	5100	20.8	746	0.102	5.25	604	2.630
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	0.0	248	B	5318	24.4	780	0.072	13.43	570	3.510
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	0.0	248	C	4879	26.6	724	0.026	6.17	580	2.250
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	0.8	1715	A	6072	34.6	1256	0.000	6.87	692	2.130
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	0.8	1715	B	6076	31.6	1294	0.000	17.29	730	2.410
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	0.8	1715	C	6683	39.8	1686	0.000	10.01	958	2.610
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	1.6	3110	A	8372	35.2	1668	0.000	7.69	698	2.190
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	1.6	3110	B	7808	33.6	1778	0.000	6.43	744	1.990
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	1.6	3110	C	7729	32.6	1784	0.000	8.37	752	2.510
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	3.5	6640	A	6850	41.0	2052	0.000	8.41	736	2.490
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	3.5	6640	B	7074	42.0	2112	0.158	10.29	754	2.570
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	3.5	6640	C	7524	43.0	2012	0.100	6.79	692	2.310
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	4.2	7750	A	7086	47.6	2292	0.192	8.47	858	3.010
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	4.2	7750	B	7283	45.4	2112	0.114	9.39	792	2.510
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	4.2	7750	C	8186	50.4	2292	0.152	8.45	858	3.050
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	4.8	8920	A	7035	45.8	2232	0.164	9.45	854	3.170
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	4.8	8920	B	7089	52.8	2192	0.128	15.49	830	3.370
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	4.8	8920	C	7002	49.0	2172	0.082	8.03	804	3.110
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	0.1	370	A	3470	11.2	332	0.000	5.61	288	0.937
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	0.1	370	B	3624	17.4	612	0.000	5.43	340	1.090
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	0.1	370	C	3990	10.8	790	0.000	32.09	286	0.777
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	1.1	2240	A	5820	18.4	1372	0.132	6.01	460	2.210
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	1.1	2240	B	5204	20.4	1134	0.106	4.65	456	0.955
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	1.1	2240	C	4468	16.8	1356	0.120	11.49	472	1.370
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	2.1	4110	A	7413	38.6	2332	0.134	7.55	540	1.330
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	2.1	4110	B	7272	32.4	2432	0.098	5.97	574	1.570
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	2.1	4110	C	5879	28.2	2412	0.164	19.69	566	3.730
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	3.1	5860	A	7101	34.4	3312	0.084	7.55	580	1.190
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	3.1	5860	B	7689	36.6	3172	0.074	7.99	562	1.190
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	3.1	5860	C	7451	31.8	3212	0.082	10.55	570	1.330
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	4.1	7630	A	8599	49.2	3572	0.052	9.31	588	1.450
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	4.1	7630	B	8422	46.0	3912	0.094	9.35	582	1.930
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	4.1	7630	C	8949	40.4	3852	0.086	13.35	596	8.790
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	5.0	9250	A	8163	45.0	4052	0.114	12.31	600	1.870
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	5.0	9250	B	7701	41.8	4092	0.112	15.49	596	2.030
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	5.0	9250	C	7771	46.4	4092	0.114	8.89	616	1.630
