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 (2020): Fluorescence properties of dissolved organic matter from Leverett Glacier outflow [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.910920
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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.
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: ZAIROV * 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