Mixing behavior of dissolved organic matter at the Yukon and Kolyma land ocean interface

Anne M. Kellerman; Peter J. Hernes; Amy M. McKenna; J. Blake Clark; Augusta Edmund; Brice Grunert; Paul J. Mann; Antonio Mannino; Michael Novak; Aron Stubbins; Maria Tzortziou; Nikita S. Zimov; Robert G. M. Spencer

doi:10.1016/j.marchem.2023.104281

Mixing behavior of dissolved organic matter at the Yukon and Kolyma land ocean interface

Anne M. Kellerman^*, Peter J. Hernes, Amy M. McKenna, J. Blake Clark, Augusta Edmund, Brice Grunert, Paul J. Mann, Antonio Mannino, Michael Novak, Aron Stubbins, Maria Tzortziou, Nikita S. Zimov, Robert G. M. Spencer

^*Corresponding author for this work

Geography and Environmental Sciences Department

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Abstract

Unprecedented rates of climate change in the Arctic are causing altered land to ocean transport of dissolved organic matter (DOM) and subsequent processing in the Arctic Ocean. Low salinity waters have been suggested as hotspots for DOM dynamics. Although a wide range of biogeochemical processes have been observed in temperate and tropical estuaries, very little is known about DOM behavior at the Arctic land-ocean interface. Here, we use dissolved organic carbon (DOC) concentration, DOM absorption properties and ultrahigh resolution mass spectrometry to assess DOM mixing behavior at the Yukon and Kolyma land-ocean interface. Mixing behavior varied seasonally in the Yukon River. During freshet, despite high spatial variability, DOC concentration was depleted ~10% compared to conservative mixing, however aromatic DOM was enriched through mid-salinity (≤15). In late summer, DOC concentration was ~20% depleted at mid-salinity, yet DOM composition reflected enhanced in situ production compared to conservative mixing. In the Kolyma, DOC concentration suggested non-conservative loss at salinity

Original language	English
Article number	104281
Journal	Marine Chemistry
Volume	255
Early online date	20 Jul 2023
DOIs	https://doi.org/10.1016/j.marchem.2023.104281
Publication status	Published - 20 Sept 2023

Keywords

Dissolved organic matter
Salinity mixing
Large Arctic estuaries
Arctic C biogeochemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.marchem.2023.104281

MARCHE_104281_AAMAccepted author manuscript, 1.39 MBLicence: CC BY-NC-ND
Supplementary InformationOther version, 476 KBLicence: CC BY-NC-ND

Cite this

Kellerman, A. M., Hernes, P. J., McKenna, A. M., Clark, J. B., Edmund, A., Grunert, B., Mann, P. J., Mannino, A., Novak, M., Stubbins, A., Tzortziou, M., Zimov, N. S., & Spencer, R. G. M. (2023). Mixing behavior of dissolved organic matter at the Yukon and Kolyma land ocean interface. Marine Chemistry, 255, Article 104281. https://doi.org/10.1016/j.marchem.2023.104281

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title = "Mixing behavior of dissolved organic matter at the Yukon and Kolyma land ocean interface",

abstract = "Unprecedented rates of climate change in the Arctic are causing altered land to ocean transport of dissolved organic matter (DOM) and subsequent processing in the Arctic Ocean. Low salinity waters have been suggested as hotspots for DOM dynamics. Although a wide range of biogeochemical processes have been observed in temperate and tropical estuaries, very little is known about DOM behavior at the Arctic land-ocean interface. Here, we use dissolved organic carbon (DOC) concentration, DOM absorption properties and ultrahigh resolution mass spectrometry to assess DOM mixing behavior at the Yukon and Kolyma land-ocean interface. Mixing behavior varied seasonally in the Yukon River. During freshet, despite high spatial variability, DOC concentration was depleted ~10% compared to conservative mixing, however aromatic DOM was enriched through mid-salinity (≤15). In late summer, DOC concentration was ~20% depleted at mid-salinity, yet DOM composition reflected enhanced in situ production compared to conservative mixing. In the Kolyma, DOC concentration suggested non-conservative loss at salinity ",

keywords = "Dissolved organic matter, Salinity mixing, Large Arctic estuaries, Arctic C biogeochemistry",

author = "Kellerman, {Anne M.} and Hernes, {Peter J.} and McKenna, {Amy M.} and Clark, {J. Blake} and Augusta Edmund and Brice Grunert and Mann, {Paul J.} and Antonio Mannino and Michael Novak and Aron Stubbins and Maria Tzortziou and Zimov, {Nikita S.} and Spencer, {Robert G. M.}",

note = "Funding information: This work was funded by the U.S. National Science Foundation (ANT-1203885/PLR-1500169) and NASA (16-RSWQ16–0042 and 20-CARBON20–0091). A portion of this work was performed at the National High Magnetic Field Laboratory ICR User Facility, which is supported by the National Science Foundation Division of Materials Research and Division of Chemistry through DMR 16–44,779 and the State of Florida. Discharge data from the Yukon River at Pilot Station was retrieved from the USGS Water Data for the Nation website. Data can be found in Tables S1–3, and through Open Science Framework (https://osf.io/s67h2/), and SeaBASS (https://seabass.gsfc.nasa.gov/cruise/Arctic_RSWQ_Yukon).",

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doi = "10.1016/j.marchem.2023.104281",

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T1 - Mixing behavior of dissolved organic matter at the Yukon and Kolyma land ocean interface

AU - Kellerman, Anne M.

AU - Hernes, Peter J.

AU - McKenna, Amy M.

AU - Clark, J. Blake

AU - Edmund, Augusta

AU - Grunert, Brice

AU - Mann, Paul J.

AU - Mannino, Antonio

AU - Novak, Michael

AU - Stubbins, Aron

AU - Tzortziou, Maria

AU - Zimov, Nikita S.

AU - Spencer, Robert G. M.

N1 - Funding information: This work was funded by the U.S. National Science Foundation (ANT-1203885/PLR-1500169) and NASA (16-RSWQ16–0042 and 20-CARBON20–0091). A portion of this work was performed at the National High Magnetic Field Laboratory ICR User Facility, which is supported by the National Science Foundation Division of Materials Research and Division of Chemistry through DMR 16–44,779 and the State of Florida. Discharge data from the Yukon River at Pilot Station was retrieved from the USGS Water Data for the Nation website. Data can be found in Tables S1–3, and through Open Science Framework (https://osf.io/s67h2/), and SeaBASS (https://seabass.gsfc.nasa.gov/cruise/Arctic_RSWQ_Yukon).

PY - 2023/9/20

Y1 - 2023/9/20

N2 - Unprecedented rates of climate change in the Arctic are causing altered land to ocean transport of dissolved organic matter (DOM) and subsequent processing in the Arctic Ocean. Low salinity waters have been suggested as hotspots for DOM dynamics. Although a wide range of biogeochemical processes have been observed in temperate and tropical estuaries, very little is known about DOM behavior at the Arctic land-ocean interface. Here, we use dissolved organic carbon (DOC) concentration, DOM absorption properties and ultrahigh resolution mass spectrometry to assess DOM mixing behavior at the Yukon and Kolyma land-ocean interface. Mixing behavior varied seasonally in the Yukon River. During freshet, despite high spatial variability, DOC concentration was depleted ~10% compared to conservative mixing, however aromatic DOM was enriched through mid-salinity (≤15). In late summer, DOC concentration was ~20% depleted at mid-salinity, yet DOM composition reflected enhanced in situ production compared to conservative mixing. In the Kolyma, DOC concentration suggested non-conservative loss at salinity

AB - Unprecedented rates of climate change in the Arctic are causing altered land to ocean transport of dissolved organic matter (DOM) and subsequent processing in the Arctic Ocean. Low salinity waters have been suggested as hotspots for DOM dynamics. Although a wide range of biogeochemical processes have been observed in temperate and tropical estuaries, very little is known about DOM behavior at the Arctic land-ocean interface. Here, we use dissolved organic carbon (DOC) concentration, DOM absorption properties and ultrahigh resolution mass spectrometry to assess DOM mixing behavior at the Yukon and Kolyma land-ocean interface. Mixing behavior varied seasonally in the Yukon River. During freshet, despite high spatial variability, DOC concentration was depleted ~10% compared to conservative mixing, however aromatic DOM was enriched through mid-salinity (≤15). In late summer, DOC concentration was ~20% depleted at mid-salinity, yet DOM composition reflected enhanced in situ production compared to conservative mixing. In the Kolyma, DOC concentration suggested non-conservative loss at salinity

KW - Dissolved organic matter

KW - Salinity mixing

KW - Large Arctic estuaries

KW - Arctic C biogeochemistry

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U2 - 10.1016/j.marchem.2023.104281

DO - 10.1016/j.marchem.2023.104281

M3 - Article

SN - 0304-4203

VL - 255

JO - Marine Chemistry

JF - Marine Chemistry

M1 - 104281

ER -

Mixing behavior of dissolved organic matter at the Yukon and Kolyma land ocean interface

Abstract

Keywords

UN SDGs

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