Spatiotemporal variability and environmental effects of greenhouse gases, nutrients, and dissolved carbons in an ice-covered reservoir.

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  • Additional Information
    • Source:
      Publisher: Elsevier Country of Publication: Netherlands NLM ID: 0147621 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1096-0953 (Electronic) Linking ISSN: 00139351 NLM ISO Abbreviation: Environ Res Subsets: MEDLINE
    • Publication Information:
      Publication: <2000- > : Amsterdam : Elsevier
      Original Publication: New York, Academic Press.
    • Subject Terms:
      Greenhouse Gases*/analysis; Carbon Dioxide/analysis ; Ice Cover ; Water ; Nitrogen/analysis ; Nitrous Oxide ; Nutrients ; Methane/analysis
    • Abstract:
      Ice cover restructures the distribution of substances in ice and underlying water and poses non-negligible environmental effects. This study aimed to clarify the spatiotemporal variability and environmental effects of methane (CH 4 ), nitrous oxide (N 2 O), total nitrogen (TN), total phosphorus (TP), dissolved organic carbon (DOC), and dissolved inorganic carbon (DIC) in ice and water columns during different ice-covered periods. We surveyed the ice-growth, ice-stability, and ice-melt periods in an ice-covered reservoir located in Northeast China. The results showed that underlying water (CH 4 : 1218.9 ± 2678.9 nmol L -1 and N 2 O: 19.3 ± 7.3 nmol L -1 ) and ice (CH 4 : 535.2 ± 2373.1 nmol L -1 and N 2 O: 9.9 ± 1.5 nmol L -1 ) were sources of atmospheric greenhouse gases. N 2 O concentrations were the highest in the bottom water of the reservoir while CH 4 accumulated the most below the ice in the riverine zone. These can be attributed to differences in the solubilities and relative molecular masses of the two gases. Higher concentrations of N 2 O, TN, TP, DOC, and DIC were recorded in the underlying water than those in the ice due to the preferential redistribution of these substances in the aqueous phase during ice formation. Additionally, we distinguished between bubble and no-bubble areas in the riverine zone and found that the higher CH 4 concentrations in the underlying water than those in the ice were due to CH 4 bubbles. In addition, we reviewed various substances in ice-water systems and found that the substances in ice-water systems can be divided into solute exclusion and particle entrapment, which are attributed to differences between dissolved and particulate states. These findings are important for a comprehensive understanding of substances dynamics during ice-covered periods.
      Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
      (Copyright © 2023 Elsevier Inc. All rights reserved.)
    • Contributed Indexing:
      Keywords: Dissolved carbons; Environmental effects; Greenhouse gases; Ice-covered reservoir; Nutrients; Spatiotemporal variability
    • Accession Number:
      0 (Greenhouse Gases)
      142M471B3J (Carbon Dioxide)
      059QF0KO0R (Water)
      N762921K75 (Nitrogen)
      K50XQU1029 (Nitrous Oxide)
      OP0UW79H66 (Methane)
    • Publication Date:
      Date Created: 20231015 Date Completed: 20231127 Latest Revision: 20231127
    • Publication Date:
      20240514
    • Accession Number:
      10.1016/j.envres.2023.117375
    • Accession Number:
      37839530