Dissolved Nitrogen Concentrations and Stable Isotopic Composition in The Eastern Canadian Arctic Archipelago and Baffin Bay, Legs 2a and 2b of the ArcticNet expedition, CCGS Amundsen, July 5th to August 15th 2019
Climate change is expected to alter the input of nitrogen (N) sources in the Eastern Canadian Arctic Archipelago (ECAA) and Baffin Bay due to increased discharge from glacial meltwater and permafrost thaw. Since dissolved inorganic N is generally depleted in surface waters, dissolved organic N (DON)...
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dataone:doi:10.18739/A2JM23H6Z 2023-11-08T14:14:14+01:00 Dissolved Nitrogen Concentrations and Stable Isotopic Composition in The Eastern Canadian Arctic Archipelago and Baffin Bay, Legs 2a and 2b of the ArcticNet expedition, CCGS Amundsen, July 5th to August 15th 2019 Annie Bourbonnais Holly Westbrook Samples were collected in the Eastern Canadian Arctic Archipelago and Baffin Bay ENVELOPE(-93.64001,-51.87299,81.761,66.593) BEGINDATE: 2019-07-05T00:00:00Z ENDDATE: 2019-08-15T00:00:00Z 2023-08-07T16:16:00.116Z https://doi.org/10.18739/A2JM23H6Z unknown Arctic Data Center Eastern Canadian Arctic Archipelago Baffin Bay Dissolved Organic Nitrogen Nitrate Stable Isotopes Dataset dataone:urn:node:ARCTIC https://doi.org/10.18739/A2JM23H6Z 2023-11-08T13:48:47Z Climate change is expected to alter the input of nitrogen (N) sources in the Eastern Canadian Arctic Archipelago (ECAA) and Baffin Bay due to increased discharge from glacial meltwater and permafrost thaw. Since dissolved inorganic N is generally depleted in surface waters, dissolved organic N (DON) could represent a significant N source fueling phytoplankton activity in Arctic ecosystems. Yet, few DON data for this region exist. We measured concentrations and stable isotope ratios (δ15N and δ18O) of DON and nitrate (NO3−) to investigate the sources and cycling of dissolved nitrogen in regional rivers and at the sea surface from samples collected in the ECAA and Baffin Bay. Samples were collected during Leg 2a and 2b of the ArcticNet expedition aboard the Canadian Coast Guard Ship (CCGS) Amundsen from July 5th to August 15th of 2019. The concentration and δ15N of DON were measured as in Knapp et al. (2005). Total dissolved nitrogen (TDN) was oxidized to NO3− using recrystallized persulfate followed by measurement on a NOx analyzer by chemiluminescent detection (Braman and Hendrix, 1989). The δ15N of NO3 was determined using the denitrifier method (Weigand et al., 2016). References: Braman, R. S., and Hendrix, S. A. (1989). Nanogram Nitrite and Nitrate Determination in Environmental and Biological Materials by Vanadium(III) Reduction with Chemiluminescence Detection. Analytical Chemistry, 61, 2715–2718. Knapp, A. N., Sigman, D. M., and Lipschultz, F. (2005). N isotopic composition of dissolved organic nitrogen and nitrate at the Bermuda Atlantic Time-series Study site. Global Biogeochemical Cycles, 19(1). Weigand, M. A., Foriel, J., Barnett, B., Oleynik, S., and Sigman, D. M. (2016). Updates to instrumentation and protocols for isotopic analysis of nitrate by the denitrifier method. Rapid Communications in Mass Spectrometry, 30(12), 1365-1383.). Dataset Arctic Archipelago Arctic ArcticNet Baffin Bay Baffin Bay Baffin Canadian Arctic Archipelago Climate change permafrost Phytoplankton Arctic Data Center (via DataONE) Arctic Baffin Bay Canadian Arctic Archipelago ENVELOPE(-93.64001,-51.87299,81.761,66.593) |
institution |
Open Polar |
collection |
Arctic Data Center (via DataONE) |
op_collection_id |
dataone:urn:node:ARCTIC |
language |
unknown |
topic |
Eastern Canadian Arctic Archipelago Baffin Bay Dissolved Organic Nitrogen Nitrate Stable Isotopes |
spellingShingle |
Eastern Canadian Arctic Archipelago Baffin Bay Dissolved Organic Nitrogen Nitrate Stable Isotopes Annie Bourbonnais Holly Westbrook Dissolved Nitrogen Concentrations and Stable Isotopic Composition in The Eastern Canadian Arctic Archipelago and Baffin Bay, Legs 2a and 2b of the ArcticNet expedition, CCGS Amundsen, July 5th to August 15th 2019 |
topic_facet |
Eastern Canadian Arctic Archipelago Baffin Bay Dissolved Organic Nitrogen Nitrate Stable Isotopes |
description |
Climate change is expected to alter the input of nitrogen (N) sources in the Eastern Canadian Arctic Archipelago (ECAA) and Baffin Bay due to increased discharge from glacial meltwater and permafrost thaw. Since dissolved inorganic N is generally depleted in surface waters, dissolved organic N (DON) could represent a significant N source fueling phytoplankton activity in Arctic ecosystems. Yet, few DON data for this region exist. We measured concentrations and stable isotope ratios (δ15N and δ18O) of DON and nitrate (NO3−) to investigate the sources and cycling of dissolved nitrogen in regional rivers and at the sea surface from samples collected in the ECAA and Baffin Bay. Samples were collected during Leg 2a and 2b of the ArcticNet expedition aboard the Canadian Coast Guard Ship (CCGS) Amundsen from July 5th to August 15th of 2019. The concentration and δ15N of DON were measured as in Knapp et al. (2005). Total dissolved nitrogen (TDN) was oxidized to NO3− using recrystallized persulfate followed by measurement on a NOx analyzer by chemiluminescent detection (Braman and Hendrix, 1989). The δ15N of NO3 was determined using the denitrifier method (Weigand et al., 2016). References: Braman, R. S., and Hendrix, S. A. (1989). Nanogram Nitrite and Nitrate Determination in Environmental and Biological Materials by Vanadium(III) Reduction with Chemiluminescence Detection. Analytical Chemistry, 61, 2715–2718. Knapp, A. N., Sigman, D. M., and Lipschultz, F. (2005). N isotopic composition of dissolved organic nitrogen and nitrate at the Bermuda Atlantic Time-series Study site. Global Biogeochemical Cycles, 19(1). Weigand, M. A., Foriel, J., Barnett, B., Oleynik, S., and Sigman, D. M. (2016). Updates to instrumentation and protocols for isotopic analysis of nitrate by the denitrifier method. Rapid Communications in Mass Spectrometry, 30(12), 1365-1383.). |
format |
Dataset |
author |
Annie Bourbonnais Holly Westbrook |
author_facet |
Annie Bourbonnais Holly Westbrook |
author_sort |
Annie Bourbonnais |
title |
Dissolved Nitrogen Concentrations and Stable Isotopic Composition in The Eastern Canadian Arctic Archipelago and Baffin Bay, Legs 2a and 2b of the ArcticNet expedition, CCGS Amundsen, July 5th to August 15th 2019 |
title_short |
Dissolved Nitrogen Concentrations and Stable Isotopic Composition in The Eastern Canadian Arctic Archipelago and Baffin Bay, Legs 2a and 2b of the ArcticNet expedition, CCGS Amundsen, July 5th to August 15th 2019 |
title_full |
Dissolved Nitrogen Concentrations and Stable Isotopic Composition in The Eastern Canadian Arctic Archipelago and Baffin Bay, Legs 2a and 2b of the ArcticNet expedition, CCGS Amundsen, July 5th to August 15th 2019 |
title_fullStr |
Dissolved Nitrogen Concentrations and Stable Isotopic Composition in The Eastern Canadian Arctic Archipelago and Baffin Bay, Legs 2a and 2b of the ArcticNet expedition, CCGS Amundsen, July 5th to August 15th 2019 |
title_full_unstemmed |
Dissolved Nitrogen Concentrations and Stable Isotopic Composition in The Eastern Canadian Arctic Archipelago and Baffin Bay, Legs 2a and 2b of the ArcticNet expedition, CCGS Amundsen, July 5th to August 15th 2019 |
title_sort |
dissolved nitrogen concentrations and stable isotopic composition in the eastern canadian arctic archipelago and baffin bay, legs 2a and 2b of the arcticnet expedition, ccgs amundsen, july 5th to august 15th 2019 |
publisher |
Arctic Data Center |
publishDate |
|
url |
https://doi.org/10.18739/A2JM23H6Z |
op_coverage |
Samples were collected in the Eastern Canadian Arctic Archipelago and Baffin Bay ENVELOPE(-93.64001,-51.87299,81.761,66.593) BEGINDATE: 2019-07-05T00:00:00Z ENDDATE: 2019-08-15T00:00:00Z |
long_lat |
ENVELOPE(-93.64001,-51.87299,81.761,66.593) |
geographic |
Arctic Baffin Bay Canadian Arctic Archipelago |
geographic_facet |
Arctic Baffin Bay Canadian Arctic Archipelago |
genre |
Arctic Archipelago Arctic ArcticNet Baffin Bay Baffin Bay Baffin Canadian Arctic Archipelago Climate change permafrost Phytoplankton |
genre_facet |
Arctic Archipelago Arctic ArcticNet Baffin Bay Baffin Bay Baffin Canadian Arctic Archipelago Climate change permafrost Phytoplankton |
op_doi |
https://doi.org/10.18739/A2JM23H6Z |
_version_ |
1782012224376668160 |