Preprints
https://doi.org/10.5194/essd-2021-256
https://doi.org/10.5194/essd-2021-256

  10 Sep 2021

10 Sep 2021

Review status: this preprint is currently under review for the journal ESSD.

High-resolution bathymetry models for the Lena Delta and Kolyma Gulf coastal zones

Matthias Fuchs1, Juri Palmtag2, Bennet Juhls1,3, Pier Paul Overduin1, Guido Grosse1,4, Ahmed Abdelwahab1,4, Michael Bedington5, Tina Sanders6, Olga Ogneva1, Irina V. Fedorova7, Nikita S. Zimov8, Paul J. Mann2, and Jens Strauss1 Matthias Fuchs et al.
  • 1Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany
  • 2Department of Geography & Environmental Sciences, Northumbria University, Newcastle upon Tyne, UK
  • 3Department of Earth Sciences, Institute for Space Sciences, Freie Universität Berlin, Berlin, Germany
  • 4Institute of Geosciences, University of Potsdam, Potsdam, Germany
  • 5Plymouth Marine Laboratory, Plymouth, UK
  • 6Helmholtz-Zentrum Hereon, Institute for Carbon Cycles, Geesthacht, Germany
  • 7St. Petersburg State University, Institute of Earth Science, St. Petersburg, Russia
  • 8North-East Scientific Station, Pacific Institute for Geography, Far-East Branch, Russian Academy of Sciences, Cherskiy, Russia

Abstract. Arctic river deltas and deltaic near-shore zones represent important land-ocean transition zones influencing sediment dynamics and nutrient fluxes from permafrost-affected terrestrial ecosystems into the coastal Arctic Ocean. To accurately model fluvial carbon and freshwater export from rapidly changing river catchments, as well assessing impacts of future change on the Arctic shelf and coastal ecosystems, we need to understand the sea floor characteristics and topographic variety of the coastal zones. To date, digital bathymetrical data from the poorly accessible, shallow and large areas of the eastern Siberian Arctic shelves are sparse. We have digitized bathymetrical information for nearly 75,000 locations from large-scale current and historical nautical maps of the Lena Delta and the Kolyma Gulf Region in Northeast Siberia. We present the first detailed and seamless digital models of coastal zone bathymetry for both delta/gulf regions. We validated the resulting bathymetry layers using a combination of our own water depth measurements and a collection of available depth measurements, which showed a strong correlation (r > 0.9). Our bathymetrical models will serve as an input for a high-resolution coupled hydrodynamic-ecosystem model to better quantify fluvial and coastal carbon fluxes to the Arctic Ocean but may be useful for a range of other studies related to Arctic delta and near-shore dynamics such as modelling of submarine permafrost, near-shore sea ice, or shelf sediment transport. The new digital high-resolution bathymetry products are available on the PANGAEA data set repository (Fuchs et al. 2021a, b). Likewise the depth validation data is available on PANGAEA as well (Fuchs et al., 2021c).

Matthias Fuchs et al.

Status: open (until 05 Nov 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Matthias Fuchs et al.

Data sets

Conductivity, temperature and depth (CTD) measurements during the CACOON cruises in 2019 in the Lena Delta region Fuchs, Matthias; Palmtag, Juri; Ogneva, Olga; Sanders, Tina; Aksenov, Aleksei; Polyakov, Vyacheslav I; Strauss, Jens https://doi.pangaea.de/10.1594/PANGAEA.933187

High-resolution bathymetry model for the Lena Delta region Fuchs, Matthias; Palmtag, Juri; Juhls, Bennet; Overduin, Pier Paul; Grosse, Guido; Abdelwahab, Ahmed; Bedington, Michael; Sanders, Tina; Ogneva, Olga; Fedorova, Irina V; Zimov, Nikita S; Mann, Paul J; Strauss, Jens https://doi.pangaea.de/10.1594/PANGAEA.934045

High-resolution bathymetry model for the Kolyma Gulf region Fuchs, Matthias; Palmtag, Juri; Juhls, Bennet; Overduin, Pier Paul; Grosse, Guido; Abdelwahab, Ahmed; Bedington, Michael; Sanders, Tina; Ogneva, Olga; Fedorova, Irina V; Zimov, Nikita S; Mann, Paul J; Strauss, Jens https://doi.pangaea.de/10.1594/PANGAEA.934049

Matthias Fuchs et al.

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Short summary
We created digital, high-resolution bathymetry data sets for the Lena Delta and Kolyma Gulf regions in northeast Siberia. Based on nautical charts, we digitized depth points and isobaths lines, which serve as an input for a 50 m bathymetry model. The benefit of this data set is the accurate mapping of near-shore areas as well as the offshore continuation of the main deep river channels. This will improve the estimation of river outflow and the nutrient flux output into the coastal zone.