Articles | Volume 18, issue 12
https://doi.org/10.5194/bg-18-3637-2021
https://doi.org/10.5194/bg-18-3637-2021
Research article
 | 
18 Jun 2021
Research article |  | 18 Jun 2021

The impact of the freeze–melt cycle of land-fast ice on the distribution of dissolved organic matter in the Laptev and East Siberian seas (Siberian Arctic)

Jens A. Hölemann, Bennet Juhls, Dorothea Bauch, Markus Janout, Boris P. Koch, and Birgit Heim

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Cited articles

Alling, V., Sanchez-Garcia, L., Porcelli, D., Pugach, S., Vonk, J. E., van Dongen, B., Morth, C. M., Anderson, L. G., Sokolov, A., Andersson, P., Humborg, C., Semiletov, I., and Gustafsson, O.: Nonconservative behavior of dissolved organic carbon across the Laptev and East Siberian seas, Global Biogeochem. Cy., 24, Gb4033, https://doi.org/10.1029/2010gb003834, 2010. 
Amon, R. M. W.: The role of dissolved organic matter for the organic carbon cycle in the Arctic Ocean, in: The organic carbon cycle in the Arctic Ocean, edited by: Stein, R. and MacDonald, R. W., Springer Verlag, Berlin, 83–99, 2004. 
Amon, R. M. W. and Meon, B.: The biogeochemistry of dissolved organic matter and nutrients in two large Arctic estuaries and potential implications for our understanding of the Arctic Ocean system, Mar. Chem., 92, 311–330, https://doi.org/10.1016/j.marchem.2004.06.034, 2004. 
Amon, R. M. W., Rinehart, A. J., Duan, S., Louchouarn, P., Prokushkin, A., Guggenberger, G., Bauch, D., Stedmon, C., Raymond, P. A., Holmes, R. M., McClelland, J. W., Peterson, B. J., Walker, S. A., and Zhulidov, A. V.: Dissolved organic matter sources in large Arctic rivers, Geochim. Cosmochim. Ac., 94, 217–237, https://doi.org/10.1016/j.gca.2012.07.015, 2012. 
Anderson, L. G. and Amon, R. M. W.: DOM in the Arctic Ocean, chap. 14, in: Biogeochemistry of Marine Dissolved Organic Matter (2nd Edn.), edited by: Hansell, D. A. and Carlson, C. A., Academic Press, Boston, 609–633, 2015. 
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Short summary
The Arctic Ocean receives large amounts of river water rich in terrestrial dissolved organic matter (tDOM), which is an important component of the Arctic carbon cycle. Our analysis shows that mixing of three major freshwater sources is the main factor that regulates the distribution of tDOM concentrations in the Siberian shelf seas. In this context, the formation and melting of the land-fast ice in the Laptev Sea and the peak spring discharge of the Lena River are of particular importance.
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