Permafrost and lakes control river isotope composition across a boreal Arctic transect in the Western Siberian lowlands. Ala-aho, P., Soulsby, C., Pokrovsky, O. S., Kirpotin, S. N., Karlsson, J., Serikova, S., Manasypov, R., Lim, A., Krickov, I., Kolesnichenko, L. G., Laudon, H., & Tetzlaff, D. Environmental Research Letters, 13(3):034028, February, 2018. Publisher: IOP Publishing![Permafrost and lakes control river isotope composition across a boreal Arctic transect in the Western Siberian lowlands [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex The Western Siberian Lowlands (WSL) store large quantities of organic carbon that will be exposed and mobilized by the thawing of permafrost. The fate of mobilized carbon, however, is not well understood, partly because of inadequate knowledge of hydrological controls in the region which has a vast low-relief surface area, extensive lake and wetland coverage and gradually increasing permafrost influence. We used stable water isotopes to improve our understanding of dominant landscape controls on the hydrology of the WSL. We sampled rivers along a 1700 km South–North transect from permafrost-free to continuous permafrost repeatedly over three years, and derived isotope proxies for catchment hydrological responsiveness and connectivity. We found correlations between the isotope proxies and catchment characteristics, suggesting that lakes and wetlands are intimately connected to rivers, and that permafrost increases the responsiveness of the catchment to rainfall and snowmelt events, reducing catchment mean transit times. Our work provides rare isotope-based field evidence that permafrost and lakes/wetlands influence hydrological pathways across a wide range of spatial scales (10–105 km2) and permafrost coverage (0%–70%). This has important implications, because both permafrost extent and lake/wetland coverage are affected by permafrost thaw in the changing climate. Changes in these hydrological landscape controls are likely to alter carbon export and emission via inland waters, which may be of global significance.
@article{ala-aho_permafrost_2018,
title = {Permafrost and lakes control river isotope composition across a boreal {Arctic} transect in the {Western} {Siberian} lowlands},
volume = {13},
issn = {1748-9326},
url = {https://dx.doi.org/10.1088/1748-9326/aaa4fe},
doi = {10.1088/1748-9326/aaa4fe},
abstract = {The Western Siberian Lowlands (WSL) store large quantities of organic carbon that will be exposed and mobilized by the thawing of permafrost. The fate of mobilized carbon, however, is not well understood, partly because of inadequate knowledge of hydrological controls in the region which has a vast low-relief surface area, extensive lake and wetland coverage and gradually increasing permafrost influence. We used stable water isotopes to improve our understanding of dominant landscape controls on the hydrology of the WSL. We sampled rivers along a 1700 km South–North transect from permafrost-free to continuous permafrost repeatedly over three years, and derived isotope proxies for catchment hydrological responsiveness and connectivity. We found correlations between the isotope proxies and catchment characteristics, suggesting that lakes and wetlands are intimately connected to rivers, and that permafrost increases the responsiveness of the catchment to rainfall and snowmelt events, reducing catchment mean transit times. Our work provides rare isotope-based field evidence that permafrost and lakes/wetlands influence hydrological pathways across a wide range of spatial scales (10–105 km2) and permafrost coverage (0\%–70\%). This has important implications, because both permafrost extent and lake/wetland coverage are affected by permafrost thaw in the changing climate. Changes in these hydrological landscape controls are likely to alter carbon export and emission via inland waters, which may be of global significance.},
language = {en},
number = {3},
urldate = {2024-03-26},
journal = {Environmental Research Letters},
author = {Ala-aho, P. and Soulsby, C. and Pokrovsky, O. S. and Kirpotin, S. N. and Karlsson, J. and Serikova, S. and Manasypov, R. and Lim, A. and Krickov, I. and Kolesnichenko, L. G. and Laudon, H. and Tetzlaff, D.},
month = feb,
year = {2018},
note = {Publisher: IOP Publishing},
keywords = {\#nosource},
pages = {034028},
}
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