Limited Presence of Permafrost Dissolved Organic Matter in the Kolyma River, Siberia Revealed by Ramped Oxidation

Rogers, Jennifer A.; Kellerman, Anne M.; Chanton, Jeffrey P.; Zimov, N.; Spencer, Robert G. M.

doi:10.1029/2020jg005977

Cited by 17 publications

(17 citation statements)

References 71 publications

(180 reference statements)

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“…Despite highly uncertain estimates for future terrestrial permafrost thaw, evidence is emerging to suggest the release of permafrost-derived OC to inland waters is underway (Mann et al 2015 ; Abbott et al, 2015 ; Wickland et al, 2018 ; Wild et al 2019 ; O’Donnell et al 2020 ; Walvoord et al 2020; Kokelj et al 2020 ). Contemporary permafrost contributions to bulk Kolyma mainstem OC calculated using dual-isotopic (Δ 14 C/δ 13 C) signatures are estimated to be 0.7 ± 0.1% during August–September (Mann et al 2015 ), and between 0.8 and 7.7% in late summer via a combination of ultrahigh-resolution mass spectrometry and ramped pyrolysis oxidation techniques (Rogers et al 2021 ). The fraction of permafrost and peat deposits to total DOC within the Kolyma and Lena Rivers have also been estimated using Δ 14 C and source apportionment across seasons (Table S8 in Wild et al 2019 ).…”

Section: Discussionmentioning

confidence: 99%

Degrading permafrost river catchments and their impact on Arctic Ocean nearshore processes

Mann

Strauß

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et al. 2021

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Arctic warming is causing ancient perennially frozen ground (permafrost) to thaw, resulting in ground collapse, and reshaping of landscapes. This threatens Arctic peoples' infrastructure, cultural sites, and land-based natural resources. Terrestrial permafrost thaw and ongoing intensification of hydrological cycles also enhance the amount and alter the type of organic carbon (OC) delivered from land to Arctic nearshore environments. These changes may affect coastal processes, food web dynamics and marine resources on which many traditional ways of life rely. Here, we examine how future projected increases in runoff and permafrost thaw from two permafrost-dominated Siberian watersheds—the Kolyma and Lena, may alter carbon turnover rates and OC distributions through river networks. We demonstrate that the unique composition of terrestrial permafrost-derived OC can cause significant increases to aquatic carbon degradation rates (20 to 60% faster rates with 1% permafrost OC). We compile results on aquatic OC degradation and examine how strengthening Arctic hydrological cycles may increase the connectivity between terrestrial landscapes and receiving nearshore ecosystems, with potential ramifications for coastal carbon budgets and ecosystem structure. To address the future challenges Arctic coastal communities will face, we argue that it will become essential to consider how nearshore ecosystems will respond to changing coastal inputs and identify how these may affect the resiliency and availability of essential food resources.

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Section: Discussionmentioning

confidence: 99%

Degrading permafrost river catchments and their impact on Arctic Ocean nearshore processes

Mann

Strauß

Palmtag

et al. 2021

Ambio

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“…For example, permafrost soils have been shown to have water extractable organic matter that widely vary in composition as a function of radiocarbon age (Gagné et al 2020), e.g., ice-rich Pleistocene-aged deposits (> 12,000 years bp) that are potentially most vulnerable to thermokarst development. This "old" carbon content may differ considerably in composition relative to modern permafrost NOM (Rogers et al 2021).…”

Section: Need For Sites Representative Of Dynamic Systemsmentioning

confidence: 99%

“…One such method has been the development of ramped pyrolysis oxidation (RPO) coupled with isotopic analyses that greatly helps to tease apart NOM source and age (Rosenheim et al 2013;Rosenheim and Galy 2012). This technique has already been implemented alongside FT-ICR MS to tie together changes in thermostability alongside molecular composition (Rogers et al 2021).…”

Section: Chemical Characterizationmentioning

confidence: 99%

Identification of next-generation International Humic Substances Society reference materials for advancing the understanding of the role of natural organic matter in the Anthropocene

et al. 2023

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Many challenges remain before we can fully understand the multifaceted role that natural organic matter (NOM) plays in soil and aquatic systems. These challenges remain despite the considerable progress that has been made in understanding NOM’s properties and reactivity using the latest analytical techniques. For nearly 4 decades, the International Humic Substances Society (IHSS, which is a non-profit scientific society) has distributed standard substances that adhere to strict isolation protocols and reference materials that are collected in bulk and originate from clearly defined sites. These NOM standard and reference samples offer relatively uniform materials for designing experiments and developing new analytical methods. The protocols for isolating NOM, and humic and fulvic acid fractions of NOM utilize well-established preparative scale column chromatography and reverse osmosis methods. These standard and reference NOM samples are used by the international scientific community to study NOM across a range of disciplines from engineered to natural systems, thereby seeding the transfer of knowledge across research fields. Recently, powerful new analytical techniques used to characterize NOM have revealed complexities in its composition that transcend the “microbial” vs. “terrestrial” precursor paradigm. To continue to advance NOM research in the Anthropocene epoch, a workshop was convened to identify potential new sites for NOM samples that would encompass a range of sources and precursor materials and would be relevant for studying NOM’s role in mediating environmental and biogeochemical processes. We anticipate that expanding the portfolio of IHSS reference and standard NOM samples available to the research community will enable this diverse group of scientists and engineers to better understand the role that NOM plays globally under the influence of anthropogenic mediated changes.

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“…To determine BDOC levels under actual environmental conditions, nutrients should not be added to reduce artifacts. In contrast, to quantify Yano et al, 1998Soil water 9-45 Fellman et al, 2009Textor et al, 2019Permafrost 11-40 Rogers et al, 2021Textor et al, 2019River water 3-56 Casas-Ruiz et al, 2016Frias et al, 1992;Knapik et al, 2015;Rogers et al, 2021;Servais et al, 1987;Textor et al, 2018 Stream water 2-35 Textor et al, 2019;Trulleyová & Rulı ḱ, 2004;Volk et…”

Section: Batch Incubationmentioning

confidence: 99%

Challenges in quantifying and characterizing dissolved organic carbon: Sampling, isolation, storage, and analysis

et al. 2022

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Despite the advancements in analytical techniques, there are still great challenges and difficulties in accurately and effectively quantifying and characterizing dissolved organic carbon (DOC) in environmental samples. The objectives of this review paper are (a) to understand the roles and variability of DOC along the water continuum; (b) to identify the constraints, inconsistences, limitations, and artifacts in DOC characterization; and (c) to provide recommendations and remarks to improve the analytical accuracy. For the first objective, we summarize the four ecological and engineering roles of DOC along the water continuum from source water to municipal utility, including nutrients and energy sources, controlling the fates of micropollutants, buffering capacity, and treatability and precursors of disinfection byproducts. We also discuss three major challenges in DOC analysis, including spatial and temporal variations, degradability and stability, and unknown structures and formulas. For the second objective, we review the procedures and steps in DOC analysis, including sampling in diverse environmental matrices, isolation of DOC fraction, storage and preservation techniques, and analyses on bulk chemical characteristics. We list and discuss the available options and evaluate the advantages and disadvantages of each choice. Last, we provide recommendations and remarks for each stage: sampling, isolation, storage, and analysis.

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Limited Presence of Permafrost Dissolved Organic Matter in the Kolyma River, Siberia Revealed by Ramped Oxidation

Cited by 17 publications

References 71 publications

Degrading permafrost river catchments and their impact on Arctic Ocean nearshore processes

Degrading permafrost river catchments and their impact on Arctic Ocean nearshore processes

Identification of next-generation International Humic Substances Society reference materials for advancing the understanding of the role of natural organic matter in the Anthropocene

Challenges in quantifying and characterizing dissolved organic carbon: Sampling, isolation, storage, and analysis

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