Carbon Dioxide and Methane Dynamics in a Small Boreal Lake During Winter and Spring Melt Events. Denfeld, B. A., Klaus, M., Laudon, H., Sponseller, R. A., & Karlsson, J. Journal of Geophysical Research: Biogeosciences, 123(8):2527–2540, 2018. _eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1029/2018JG004622![Carbon Dioxide and Methane Dynamics in a Small Boreal Lake During Winter and Spring Melt Events [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex In seasonally ice-covered lakes, carbon dioxide (CO2) and methane (CH4) emission at ice-off can account for a significant fraction of the annual budget. Yet knowledge of the mechanisms controlling below lake-ice carbon (C) dynamics and subsequent CO2 and CH4 emissions at ice-off is limited. To understand the control of below ice C dynamics, and C emissions in spring, we measured spatial variation in CO2, CH4, and dissolved inorganic and organic carbon from ice-on to ice-off, in a small boreal lake during a winter with sporadic melting events. Winter melt events were associated with decreased surface water DOC in the forest-dominated basin and increased surface water CH4 in the mire-dominated basin. At the whole-lake scale, CH4 accumulated below ice throughout the winter, whereas CO2 accumulation was greatest in early winter. Mass-balance estimates suggest that, in addition to the CO2 and CH4 accumulated during winter, external inputs of CO2 and CH4 and internal processing during ice-melt could represent significant sources of C gas emissions during ice-off. Moreover, internal processing of CO2 and CH4 worked in opposition, with production of CO2 and oxidation of CH4 dominating at ice-off. These findings have important implications for how small boreal lakes will respond to warmer winters in the future; increased winter melt events will likely increase external inputs below ice and thus alter the extent and timing of CO2 and CH4 emissions to the atmosphere at ice-off.
@article{denfeld_carbon_2018,
title = {Carbon {Dioxide} and {Methane} {Dynamics} in a {Small} {Boreal} {Lake} {During} {Winter} and {Spring} {Melt} {Events}},
volume = {123},
copyright = {©2018. American Geophysical Union. All Rights Reserved.},
issn = {2169-8961},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1029/2018JG004622},
doi = {10.1029/2018JG004622},
abstract = {In seasonally ice-covered lakes, carbon dioxide (CO2) and methane (CH4) emission at ice-off can account for a significant fraction of the annual budget. Yet knowledge of the mechanisms controlling below lake-ice carbon (C) dynamics and subsequent CO2 and CH4 emissions at ice-off is limited. To understand the control of below ice C dynamics, and C emissions in spring, we measured spatial variation in CO2, CH4, and dissolved inorganic and organic carbon from ice-on to ice-off, in a small boreal lake during a winter with sporadic melting events. Winter melt events were associated with decreased surface water DOC in the forest-dominated basin and increased surface water CH4 in the mire-dominated basin. At the whole-lake scale, CH4 accumulated below ice throughout the winter, whereas CO2 accumulation was greatest in early winter. Mass-balance estimates suggest that, in addition to the CO2 and CH4 accumulated during winter, external inputs of CO2 and CH4 and internal processing during ice-melt could represent significant sources of C gas emissions during ice-off. Moreover, internal processing of CO2 and CH4 worked in opposition, with production of CO2 and oxidation of CH4 dominating at ice-off. These findings have important implications for how small boreal lakes will respond to warmer winters in the future; increased winter melt events will likely increase external inputs below ice and thus alter the extent and timing of CO2 and CH4 emissions to the atmosphere at ice-off.},
language = {en},
number = {8},
urldate = {2024-03-26},
journal = {Journal of Geophysical Research: Biogeosciences},
author = {Denfeld, B. A. and Klaus, M. and Laudon, H. and Sponseller, R. A. and Karlsson, J.},
year = {2018},
note = {\_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1029/2018JG004622},
keywords = {\#nosource, carbon cycle, carbon dioxide, emissions, ice-covered lake, methane, winter limnology},
pages = {2527--2540},
}
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