High-Resolution in situ measurement of nitrate in runoff from the Greenland Ice Sheet
We report the first in situ high-resolution nitrate time series from two proglacial meltwater rivers draining the Greenland Ice Sheet, using a recently developed submersible analyzer based on lab-on-chip (LOC) technology. The low sample volume (320 μL) required by the LOC analyzer meant that low con...
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ftsouthampton:oai:eprints.soton.ac.uk:416009 2023-07-30T04:03:36+02:00 High-Resolution in situ measurement of nitrate in runoff from the Greenland Ice Sheet Beaton, Alexander D. Wadham, Jemma L. Hawkings, Jon Bagshaw, Elizabeth A. Lamarche-gagnon, Guillaume Mowlem, Matthew C. Tranter, Martyn 2017-11-07 text https://eprints.soton.ac.uk/416009/ https://eprints.soton.ac.uk/416009/1/BeatonNitrate2017_revisied.pdf en English eng https://eprints.soton.ac.uk/416009/1/BeatonNitrate2017_revisied.pdf Beaton, Alexander D., Wadham, Jemma L., Hawkings, Jon, Bagshaw, Elizabeth A., Lamarche-gagnon, Guillaume, Mowlem, Matthew C. and Tranter, Martyn (2017) High-Resolution in situ measurement of nitrate in runoff from the Greenland Ice Sheet. Environmental Science & Technology, 51 (21), 12518-12527. (doi:10.1021/acs.est.7b03121 <http://dx.doi.org/10.1021/acs.est.7b03121>). accepted_manuscript Article PeerReviewed 2017 ftsouthampton 2023-07-09T22:19:11Z We report the first in situ high-resolution nitrate time series from two proglacial meltwater rivers draining the Greenland Ice Sheet, using a recently developed submersible analyzer based on lab-on-chip (LOC) technology. The low sample volume (320 μL) required by the LOC analyzer meant that low concentration (few micromolar to submicromolar), highly turbid subglacial meltwater could be filtered and colorimetrically analyzed in situ. Nitrate concentrations in rivers draining Leverett Glacier in southwest Greenland and Kiattuut Sermiat in southern Greenland exhibited a clear diurnal signal and a gradual decline at the commencement of the melt season, displaying trends that would not be discernible using traditional daily manual sampling. Nitrate concentrations varied by 4.4 μM (±0.2 μM) over a 10 day period at Kiattuut Sermiat and 3.0 μM (±0.2 μM) over a 14 day period at Leverett Glacier. Marked changes in nitrate concentrations were observed when discharge began to increase. High-resolution in situ measurements such as these have the potential to significantly advance the understanding of nutrient cycling in remote systems, where the dynamics of nutrient release are complex but are important for downstream biogeochemical cycles. Article in Journal/Newspaper glacier Greenland Ice Sheet Leverett Glacier University of Southampton: e-Prints Soton Greenland Kiattuut Sermiat ENVELOPE(-45.267,-45.267,61.267,61.267) Leverett Glacier ENVELOPE(-147.583,-147.583,-85.633,-85.633) |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
We report the first in situ high-resolution nitrate time series from two proglacial meltwater rivers draining the Greenland Ice Sheet, using a recently developed submersible analyzer based on lab-on-chip (LOC) technology. The low sample volume (320 μL) required by the LOC analyzer meant that low concentration (few micromolar to submicromolar), highly turbid subglacial meltwater could be filtered and colorimetrically analyzed in situ. Nitrate concentrations in rivers draining Leverett Glacier in southwest Greenland and Kiattuut Sermiat in southern Greenland exhibited a clear diurnal signal and a gradual decline at the commencement of the melt season, displaying trends that would not be discernible using traditional daily manual sampling. Nitrate concentrations varied by 4.4 μM (±0.2 μM) over a 10 day period at Kiattuut Sermiat and 3.0 μM (±0.2 μM) over a 14 day period at Leverett Glacier. Marked changes in nitrate concentrations were observed when discharge began to increase. High-resolution in situ measurements such as these have the potential to significantly advance the understanding of nutrient cycling in remote systems, where the dynamics of nutrient release are complex but are important for downstream biogeochemical cycles. |
format |
Article in Journal/Newspaper |
author |
Beaton, Alexander D. Wadham, Jemma L. Hawkings, Jon Bagshaw, Elizabeth A. Lamarche-gagnon, Guillaume Mowlem, Matthew C. Tranter, Martyn |
spellingShingle |
Beaton, Alexander D. Wadham, Jemma L. Hawkings, Jon Bagshaw, Elizabeth A. Lamarche-gagnon, Guillaume Mowlem, Matthew C. Tranter, Martyn High-Resolution in situ measurement of nitrate in runoff from the Greenland Ice Sheet |
author_facet |
Beaton, Alexander D. Wadham, Jemma L. Hawkings, Jon Bagshaw, Elizabeth A. Lamarche-gagnon, Guillaume Mowlem, Matthew C. Tranter, Martyn |
author_sort |
Beaton, Alexander D. |
title |
High-Resolution in situ measurement of nitrate in runoff from the Greenland Ice Sheet |
title_short |
High-Resolution in situ measurement of nitrate in runoff from the Greenland Ice Sheet |
title_full |
High-Resolution in situ measurement of nitrate in runoff from the Greenland Ice Sheet |
title_fullStr |
High-Resolution in situ measurement of nitrate in runoff from the Greenland Ice Sheet |
title_full_unstemmed |
High-Resolution in situ measurement of nitrate in runoff from the Greenland Ice Sheet |
title_sort |
high-resolution in situ measurement of nitrate in runoff from the greenland ice sheet |
publishDate |
2017 |
url |
https://eprints.soton.ac.uk/416009/ https://eprints.soton.ac.uk/416009/1/BeatonNitrate2017_revisied.pdf |
long_lat |
ENVELOPE(-45.267,-45.267,61.267,61.267) ENVELOPE(-147.583,-147.583,-85.633,-85.633) |
geographic |
Greenland Kiattuut Sermiat Leverett Glacier |
geographic_facet |
Greenland Kiattuut Sermiat Leverett Glacier |
genre |
glacier Greenland Ice Sheet Leverett Glacier |
genre_facet |
glacier Greenland Ice Sheet Leverett Glacier |
op_relation |
https://eprints.soton.ac.uk/416009/1/BeatonNitrate2017_revisied.pdf Beaton, Alexander D., Wadham, Jemma L., Hawkings, Jon, Bagshaw, Elizabeth A., Lamarche-gagnon, Guillaume, Mowlem, Matthew C. and Tranter, Martyn (2017) High-Resolution in situ measurement of nitrate in runoff from the Greenland Ice Sheet. Environmental Science & Technology, 51 (21), 12518-12527. (doi:10.1021/acs.est.7b03121 <http://dx.doi.org/10.1021/acs.est.7b03121>). |
op_rights |
accepted_manuscript |
_version_ |
1772814638521516032 |