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)

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

doi:https://doi.org/10.5194/bg-18-3637-2021

Articles | Volume 18, issue 12

https://doi.org/10.5194/bg-18-3637-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/bg-18-3637-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 12

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

Data sets

Physical oceanography, nutrients, and δ¹⁸O measured on water bottle samples in the Laptev Sea D. Bauch, E. Cherniavskayia, A. Novikhin, and H. Kassens https://doi.org/10.1594/PANGAEA.885448

Stable oxygen isotope analysis of water samples during helicopter/ice camp TRANSDRIFT-XX, Laptev Sea D. Bauch and B. Thibodeau https://doi.org/10.1594/PANGAEA.924538

Surface water dissolved organic matter (DOC, CDOM) in the Lena River A. Eulenburg, B. Juhls, and J. A. Hölemann https://doi.org/10.1594/PANGAEA.898711

Colored dissolved organic matter (CDOM) measured during cruise TRANSDRIFT-XVII, Laptev Sea. J. A. Hölemann, B. Juhls, and L. A. Timokhov https://doi.org/10.1594/PANGAEA.924206

Colored dissolved organic matter (CDOM) and dissolved organic carbon (DOC) measured during cruise TRANSDRIFT-XIX, Laptev Sea J. A. Hölemann, B. P. Koch, B. Juhls, and L. A. Timokhov https://doi.org/10.1594/PANGAEA.924209

Colored dissolved organic matter (CDOM) and dissolved organic carbon (DOC) measured during helicopter/ice camp TRANSDRIFT-XX, Laptev Sea J. A. Hölemann, B. P. Koch, B. Juhls, and L. A. Timokhov https://doi.org/10.1594/PANGAEA.924228

Colored dissolved organic matter (CDOM) measured during cruise TRANSDRIFT-XXI, Laptev Sea J. A. Hölemann, B. Juhls, and L. A. Timokhov https://doi.org/10.1594/PANGAEA.924203

Colored dissolved organic matter (CDOM) and dissolved organic carbon (DOC) measured during cruise TRANSDRIFT-XXII, Laptev Sea J. A. Hölemann, B. P. Koch, B. Juhls, and L. A. Timokhov https://doi.org/10.1594/PANGAEA.924202

Colored dissolved organic matter (CDOM) and dissolved organic carbon (DOC) measured during cruise TRANSDRIFT-XXIV, Laptev Sea J. A. Hölemann, B. P. Koch, B. Juhls, and V. Ivanov https://doi.org/10.1594/PANGAEA.924210

Colored dissolved organic matter (CDOM) and dissolved organic carbon (DOC) measured during cruise TRANSARKTIKA-2019 Leg4, Laptev Sea and East Siberian Sea J. A. Hölemann, A. Chetverova, B. Juhls, and N. Kusse-Tiuz https://doi.org/10.1594/PANGAEA.924211

Surface water dissolved organic matter (DOC, CDOM) in the Lena River G. Kattner, B. Juhls, and B. Heim https://doi.org/10.1594/PANGAEA.898705

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.