Citation:

PANGAEA.910920

Name: Fluorescence properties of dissolved organic matter from Leverett Glacier outflow
Published: 2020-01-17
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Dissolved Organic Matter; DOM; Fluorescence; glaciers; PARAFAC

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Abstract:

The outflow of Leverett Glacier, a large land-terminating glacier of the Greenland Ice Sheet was sampled over the 2015 ablation season. Dissolved organic carbon (DOC) concentrations, dissolved organic matter (DOM) fluorescence, and hydrogeochemical data (e.g. discharge, specific conductivity, pH, and turbidity) were analyzed to assess changing DOM sources over the melt season. DOC concentrations and red-shifted fluorescence suggest terrestrial inputs from overridden soils dominated DOM early season inputs before progressive dilution with increasing discharge. During the outburst period, supraglacial drainage events disrupted the subglacial drainage system and introduced dominant protein-like fluorescence signatures not observed in basal flow. These results suggest that subglacial hydrology and changing water sources influence exported DOC concentration and DOM composition, differentiated through fluorescence characteristics. The outburst and post-outburst periods were characterized by protein-like fluorescence from supraglacial and potentially subglacial microbial sources.

Keyword(s):

Dissolved Organic Matter; DOM; Fluorescence; glaciers; PARAFAC

Supplement to:

Kellerman, Anne M; Hawkings, Jon R; Wadham, Jemma; Kohler, Tyler; Stibal, Marek; Grater, Elizabeth; Marshall, Matthew; Hatton, Jade Elizabeth; Beaton, Alexander; Spencer, Robert G M (accepted): Glacier outflow dissolved organic matter as a window into seasonally changing carbon sources: Leverett Glacier, Greenland. Journal of Geophysical Research: Biogeosciences, e2019JG005161, https://doi.org/10.1029/2019JG005161

Further details:

Bartholomew, I; Nienow, Peter; Sole, Andrew J; Mair, D; Cowton, T; Palmer, Steven J; Wadham, Jemma (2011): Supraglacial forcing of subglacial drainage in the ablation zone of the Greenland ice sheet. Geophysical Research Letters, 38(8), n/a-n/a, https://doi.org/10.1029/2011GL047063

Cowton, T; Nienow, Peter; Bartholomew, I; Sole, Andrew J; Mair, D (2012): Rapid erosion beneath the Greenland ice sheet. Geology, 40(4), 343-346, https://doi.org/10.1130/G32687.1

Hawkings, Jon R; Hatton, Jade Elizabeth; Hendry, Katharine R; de Souza, Gregory F; Wadham, Jemma; Ivanovic, Ruza F; Kohler, T J; Stibal, Marek; Beaton, Alexander; Lamarche-Gagnon, G; Tedstone, Andrew; Hain, Mathis P; Bagshaw, Elizabeth; Pike, Jennifer; Tranter, Martyn (2018): The silicon cycle impacted by past ice sheets. Nature Communications, 9(1), https://doi.org/10.1038/s41467-018-05689-1

Hawkings, Jon R; Wadham, Jemma; Tranter, Martyn; Telling, Jon; Bagshaw, Elizabeth; Beaton, Alexander; Simmons, Sarah-Louise; Chandler, David M; Tedstone, Andrew; Nienow, Peter (2016): The Greenland Ice Sheet as a hot spot of phosphorus weathering and export in the Arctic. Global Biogeochemical Cycles, 30(2), 191-210, https://doi.org/10.1002/2015GB005237

Kohler, T J; Žárský, J D; Yde, J; Lamarche-Gagnon, G; Hawkings, Jon R; Tedstone, Andrew; Wadham, Jemma; Beaton, A D; Stibal, Marek (2017): Carbon dating reveals a seasonal progression in the source of particulate organic carbon exported from the Greenland Ice Sheet. Geophysical Research Letters, 44(12), 6209-6217, https://doi.org/10.1002/2017GL073219

Murphy, Kathleen; Stedmon, Colin A; Graeber, Daniel; Bro, Rasmus (2013): Fluorescence spectroscopy and multi-way techniques. PARAFAC. Analytical Methods, 5(23), 6557, https://doi.org/10.1039/C3AY41160E

Wadham, Jemma; Hawkings, Jonathan; Telling, Jon; Chandler, David M; Alcock, Jon; O'Donnell, Emily; Preeti, Kaur; Bagshaw, Elizabeth; Tranter, Martyn; Tedstone, Andre; Nienow, Peter (2016): Sources, cycling and export of nitrogen on the Greenland Ice Sheet. Biogeosciences, 13(22), 6339-6352, https://doi.org/10.5194/bg-13-6339-2016

Coverage:

Median Latitude: 67.070000 * Median Longitude: -50.210000 * South-bound Latitude: 67.060000 * West-bound Longitude: -50.230000 * North-bound Latitude: 67.090000 * East-bound Longitude: -50.200000

Date/Time Start: 2015-05-12T11:45:00 * Date/Time End: 2015-10-28T00:00:00

Event(s):

Leverett_glacier_basal_ice * Latitude: 67.090000 * Longitude: -50.230000 * Location: Greenland * Method/Device: Snow/ice sample (SNOW)

Leverett_glacier_snow * Latitude: 67.060000 * Longitude: -50.200000 * Location: Greenland * Method/Device: Snow/ice sample (SNOW)

Leverett_glacier_time_series * Latitude: 67.060000 * Longitude: -50.200000 * Date/Time Start: 2015-05-12T00:00:00 * Date/Time End: 2015-10-28T00:00:00 * Location: Greenland * Campaign: * Basis: L Atalante

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Kellerman, Anne M
2	DATE/TIME	Date/Time		Kellerman, Anne M		Geocode
3	Period	Period		Kellerman, Anne M		sampling period
4	Day of the year	DOY	day	Kellerman, Anne M
5	Carbon, organic, dissolved	DOC	mg/l	Kellerman, Anne M	Shimadzu TOC-L total organic carbon analyzer	High sensitivity catalyst, calibration curve 0.05-2.5 mg C/L
6	Fluorescence	Fluorescence		Kellerman, Anne M	Fluorescence spectrometer, AquaLog, HORIBA JobinYvon	total fluorescence, values obtained by Parallel factor analysis
7	Fluorescence, dissolved organic matter, at 317 nm wavelength	fDOM 317	%	Kellerman, Anne M	Fluorescence spectrometer, AquaLog, HORIBA JobinYvon	%C317, % Raman units, values obtained by Parallel factor analysis
8	Fluorescence, dissolved organic matter, at 483 nm wavelength	fDOM 483	%	Kellerman, Anne M	Fluorescence spectrometer, AquaLog, HORIBA JobinYvon	%C483, % Raman units, values obtained by Parallel factor analysis
9	Fluorescence, dissolved organic matter, at 425 nm wavelength	fDOM 425	%	Kellerman, Anne M	Fluorescence spectrometer, AquaLog, HORIBA JobinYvon	%C425, % Raman units, values obtained by Parallel factor analysis
10	Fluorescence, dissolved organic matter, at 416 nm wavelength	fDOM 416	%	Kellerman, Anne M	Fluorescence spectrometer, AquaLog, HORIBA JobinYvon	%C416, % Raman units, values obtained by Parallel factor analysis
11	Fluorescence, dissolved organic matter, at 368 nm wavelength	fDOM 368	%	Kellerman, Anne M	Fluorescence spectrometer, AquaLog, HORIBA JobinYvon	%C368, % Raman units, values obtained by Parallel factor analysis
12	Flow rate	Q	m³/s	Kellerman, Anne M	Pressure transducer, HOBO	at time of sampling; stage was converted into discharge using a rating curve of 26 Rhodamine-WT dye dilution injections.
13	Conductivity	Cond	mS/cm	Kellerman, Anne M	Campbell Scientific 247-L Conductivity and Temperature Probe
14	Suspended particulate matter	SPM	mg/l	Kellerman, Anne M	Roorkee Industries Suspended Sediment Sampler USDH-48	suspended particulate matter
15	pH	pH		Kellerman, Anne M	Honeywell Durafet pH sensors
16	Nitrogen in nitrate	N-[NO3]-	µmol/l	Kellerman, Anne M	Thermo Scientific Dionex IonPac AS11-HC-4μm Anion-Exchange Column fitted to a Thermo Scientific Dionex ICS-5000 Ion Chromatography
17	Phosphorus in orthophosphate	P-[PO4]3-	µmol/l	Kellerman, Anne M	Lachat QuickChem 8500 flow injection autoanalyser	sampling protocol based on the molybdenum blue method
18	Carbon, organic, dissolved load	DOC load	g/s	Kellerman, Anne M

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Size:

785 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Event	2 Date/Time	3 Period	4 DOY [day]	5 DOC [mg/l]	6 Fluorescence	7 fDOM 317 [%]	8 fDOM 483 [%]	9 fDOM 425 [%]	10 fDOM 416 [%]	11 fDOM 368 [%]	12 Q [m³/s]	13 Cond [mS/cm]	14 SPM [mg/l]	15 pH	16 N-[NO3]- [µmol/l]	17 P-[PO4]3- [µmol/l]	18 DOC load [g/s]
Leverett_glacier_time_series	2015-05-12T11:45	Onset of melt	132	0.63	0.89	19	27	27	14	14	1.9	0.0460		8.20	3.9	0.04	1.2
Leverett_glacier_time_series	2015-05-14T10:30	Onset of melt	134	0.63	0.89	18	29	29	12	12	2.3	0.0284		7.90	2.6	0.04	1.4
Leverett_glacier_time_series	2015-05-16T10:40	Onset of melt	136	0.63	1.02	16	32	30	13	10	2.8	0.0300		8.00	3.8	0.02	1.8
Leverett_glacier_time_series	2015-05-17T10:30	Onset of melt	137	0.64	0.94	13	33	31	14	9	3.0	0.0374		8.06	4.0	0.04	1.9
Leverett_glacier_time_series	2015-05-18T18:00	Onset of melt	138	0.67	1.41	24	26	25	11	14	3.1	0.0443		8.05	4.2	0.03	2.1
Leverett_glacier_time_series	2015-05-18T11:30	Onset of melt	138	0.66	0.97	17	30	30	13	10	3.2	0.0251		7.90	4.5	0.04	2.1
Leverett_glacier_time_series	2015-05-20T10:35	Onset of melt	140	0.96	1.63	9	34	31	13	13	3.7	0.0283		8.20	4.8	0.07	3.6
Leverett_glacier_time_series	2015-05-22T10:05	Onset of melt	142	0.95	1.48	6	32	31	14	17	4.0	0.0465		8.20	4.8	0.05	3.8
Leverett_glacier_time_series	2015-05-23T10:40	Onset of melt	143	0.94	1.5	8	35	31	13	13	4.3	0.0510		8.00	4.7	0.03	4.0
Leverett_glacier_time_series	2015-05-24T10:05	Onset of melt	144	0.82	1.33	12	31	29	14	15	4.6	0.0508		8.00	4.2	0.01	3.8
Leverett_glacier_time_series	2015-05-26T10:15	Onset of melt	146	0.77	1.19	7	35	32	14	11	5.0	0.0346		7.90	3.6	0.04	3.9
Leverett_glacier_time_series	2015-05-28T10:10	Onset of melt	148	0.76	1.31	9	34	31	13	13	5.5	0.0287	510.00	7.63	3.5	0.07	4.2
Leverett_glacier_time_series	2015-05-30T10:15	Onset of melt	150	0.55	1.02	10	34	31	13	11	4.3	0.0284	520.00	7.62	2.7	0.03	2.4
Leverett_glacier_time_series	2015-06-01T10:00	Onset of melt	152	0.64	1.43	26	27	25	10	12	11.9	0.0232	540.00	7.58	1.9	0.08	7.6
Leverett_glacier_time_series	2015-06-03T10:45	Onset of melt	154	0.45	0.71	14	36	31	12	8	12.3	0.0370	530.00	7.72	2.5	0.09	5.5
Leverett_glacier_time_series	2015-06-05T10:15	Onset of melt	156	0.32	0.68	29	27	24	10	10	16.1	0.0325	530.00	7.70	3.0	0.07	5.2
Leverett_glacier_time_series	2015-06-07T10:00	Onset of melt	158	0.48	0.84	14	37	30	11	8	21.9	0.0209	540.00	7.62	2.8	0.07	10.5
Leverett_glacier_time_series	2015-06-09T10:20	Onset of melt	160	0.40	0.65	15	40	31	10	5	17.6	0.0304	530.00	7.76	3.4	0.07	7.0
Leverett_glacier_time_series	2015-06-11T09:15	Onset of melt	162	0.36	0.73	21	32	26	10	12	16.4	0.0270	530.00	7.70	3.5	0.11	5.9
Leverett_glacier_time_series	2015-06-13T10:05	Onset of melt	164	0.24	0.41	23	35	29	9	3	21.4	0.0204	540.00	7.55	2.1	0.09	5.1
Leverett_glacier_time_series	2015-06-15T10:20	Onset of melt	166	0.16	0.35	28	26	24	10	12	28.5	0.0183	570.00	7.60	2.6	0.09	4.6
Leverett_glacier_time_series	2015-06-17T10:10	Onset of melt	168	0.22	0.49	33	30	24	7	5	36.4	0.0244	580.00	7.73	2.5	0.12	8.0
Leverett_glacier_time_series	2015-06-19T10:30	Onset of melt	170	0.12	0.27	44	25	25	7	0	54.6	0.0191	690.00	7.78	2.4	0.18	6.6
Leverett_glacier_time_series	2015-06-20T10:05	Outburst period	171	0.18	0.36	28	24	23	9	17	72.4	0.0170	1180.00	8.04	2.0	0.14	13.0
Leverett_glacier_time_series	2015-06-21T10:15	Outburst period	172	0.12	0.27	49	23	23	6	0	83.5	0.0138	1050.00	8.01	2.8	0.14	10.0
Leverett_glacier_time_series	2015-06-23T10:15	Outburst period	174	0.09	0.32	51	17	20	7	6	84.5	0.0083	720.00	7.72	1.7	0.16	7.6
Leverett_glacier_time_series	2015-06-25T10:15	Outburst period	176	0.10	0.3	38	23	24	11	5	105.5	0.0127	1010.00	8.01	1.5	0.17	10.6
Leverett_glacier_time_series	2015-06-27T10:00	Outburst period	178	0.14	0.35	49	20	21	8	3	120.3	0.0137	1370.00	8.47	0.9	0.25	16.8
Leverett_glacier_time_series	2015-06-29T10:00	Outburst period	180	0.14	0.27	52	21	21	6	0	144.0	0.0115	1110.00	8.41	2.0	0.24	20.2
Leverett_glacier_time_series	2015-07-01T09:30	Outburst period	182	0.13	0.53	76	9	11	2	2	171.1	0.0081	1080.00	8.31	1.9	0.29	22.2
Leverett_glacier_time_series	2015-07-02T10:05	Outburst period	183	0.11	0.42	31	11	13	33	12	215.1	0.0141	2090.00	9.06	1.8	0.18	23.7
Leverett_glacier_time_series	2015-07-03T10:05	Outburst period	184	0.14	0.33	61	16	15	5	3	204.6	0.0136	1470.00	8.84	1.8	0.18	28.6
Leverett_glacier_time_series	2015-07-05T10:30	Outburst period	186	0.10	0.37	65	13	16	6	0	207.2	0.0095	890.00	8.27	1.8	0.18	20.7
Leverett_glacier_time_series	2015-07-06T09:30	Outburst period	187	0.11	0.7	29	5	6	58	2	213.9	0.0082	820.00	8.18	1.8	0.20	23.5
Leverett_glacier_time_series	2015-07-07T10:00	Outburst period	188	0.07	0.42	27	6	9	48	10	245.9	0.0073	890.00	8.29	1.7	0.17	17.2
Leverett_glacier_time_series	2015-07-08T09:45	Outburst period	189	0.12	0.29	70	10	13	5	2	294.5	0.0083	970.00	8.60	1.6	0.12	35.3
Leverett_glacier_time_series	2015-07-10T10:25	Outburst period	191	0.10	0.31	58	10	13	5	14	366.6	0.0110	1050.00	9.19	1.9	0.21	36.7
Leverett_glacier_time_series	2015-07-11T10:25	Outburst period	192		0.63	37	6	7	45	5	366.6	0.0109	900.00	9.10	0.8	0.23
Leverett_glacier_time_series	2015-07-13T10:10	Post-outburst	194	0.06	0.51	38	5	7	49	0	253.2	0.0087	770.00	8.69	1.4	0.17	15.2
Leverett_glacier_time_series	2015-07-15T07:55	Post-outburst	196		0.33	82	8	9	0	0	229.4	0.0074	660.00	8.36	1.4	0.17
Leverett_glacier_time_series	2015-07-17T10:15	Post-outburst	198	0.06	0.69	53	3	4	39	1	281.7	0.0078	680.00	8.33	0.8	0.15	16.9
Leverett_glacier_time_series	2015-07-19T10:45	Post-outburst	200		0.23	76	8	10	3	3	311.3	0.0098	660.00	8.58	1.0	0.20
Leverett_glacier_time_series	2015-07-21T11:30	Post-outburst	202	0.07	0.53	73	6	7	2	12	322.1	0.0114	670.00	8.82	0.8	0.17	22.5
Leverett_glacier_time_series	2015-07-23T10:25	Post-outburst	204	0.08	0.3	76	8	9	2	5	306.4	0.0112	660.00	8.94	1.1	0.23	24.5
Leverett_glacier_time_series	2015-07-26T10:05	Post-outburst	207	0.10	0.63	43	4	6	43	3	301.9	0.0137	700.00	9.45	1.1	0.22	30.2
Leverett_glacier_time_series	2015-07-28T07:22	Post-outburst	209		0.58	34	5	7	49	5	240.3	0.0168	760.00	9.53	0.7	0.24
Leverett_glacier_time_series	2015-07-29T08:25	Post-outburst	210	0.07	0.49	34	6	7	43	10	236.8	0.0146	830.00	9.46	1.2	0.23	16.6
Leverett_glacier_time_series	2015-10-28T00:00	October	301	0.49	0.81	24	31	23	10	12
Leverett_glacier_basal_ice		Basal Ice			1.84	21	32	21	8	18
Leverett_glacier_basal_ice		Basal Ice			2.55	17	36	21	8	17
Leverett_glacier_basal_ice		Basal Ice		0.88	3.4	17	33	27	12	11
Leverett_glacier_snow		Snow			0.1	100	0	0	0	0
Leverett_glacier_snow		Snow			0.09	100	0	0	0	0
Leverett_glacier_snow		Snow			0.24	96	0	4	0	0