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Cryosphere-Carbon on Top of the Earth (CC-Top):Decreasing Uncertainties of Thawing Permafrost and Collapsing Methane Hydrates in the Arctic

Total Cost €


EC-Contrib. €






 CC-TOP project word cloud

Explore the words cloud of the CC-TOP project. It provides you a very rough idea of what is the project "CC-TOP" about.

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Project "CC-TOP" data sheet

The following table provides information about the project.


Organization address
postcode: 10691

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Sweden [SE]
 Project website
 Total cost 2˙499˙756 €
 EC max contribution 2˙499˙756 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2015-AdG
 Funding Scheme ERC-ADG
 Starting year 2016
 Duration (year-month-day) from 2016-11-01   to  2021-10-31


Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    STOCKHOLMS UNIVERSITET SE (STOCKHOLM) coordinator 2˙499˙756.00


 Project objective

The enormous quantities of frozen carbon in the Arctic, held in shallow soils and sediments, act as “capacitors” of the global carbon system. Thawing permafrost (PF) and collapsing methane hydrates are top candidates to cause a net transfer of carbon from land/ocean to the atmosphere this century, yet uncertainties abound.

Our program targets the East Siberian Arctic Ocean (ESAO), the World’s largest shelf sea, as it holds 80% of coastal PF, 80% of subsea PF and 75% of shallow hydrates. Our initial findings (e.g., Science, 2010; Nature, 2012; PNAS; 2013; Nature Geoscience, 2013, 2014) are challenging earlier notions by showing complexities in terrestrial PF-Carbon remobilization and extensive venting of methane from subsea PF/hydrates. The objective of the CC-Top Program is to transform descriptive and data-lean pictures into quantitative understanding of the CC system, to pin down the present and predict future releases from these “Sleeping Giants” of the global carbon system.

The CC-Top program combines unique Arctic field capacities with powerful molecular-isotopic characterization of PF-carbon/methane to break through on:

The “awakening” of terrestrial PF-C pools: CC-Top will employ great pan-arctic rivers as natural integrators and by probing the δ13C/Δ14C and molecular fingerprints, apportion release fluxes of different PF-C pools.

The ESAO subsea cryosphere/methane: CC-Top will use recent spatially-extensive observations, deep sediment cores and gap-filling expeditions to (i) estimate distribution of subsea PF and hydrates; (ii) establish thermal state (thawing rate) of subsea PF-C; (iii) apportion sources of releasing methane btw subsea-PF, shallow hydrates vs seepage from the deep petroleum megapool using source-diagnostic triple-isotope fingerprinting.

Arctic Ocean slope hydrates: CC-Top will investigate sites (discovered by us 2008-2014) of collapsed hydrates venting methane, to characterize geospatial distribution and causes of destabilization.


year authors and title journal last update
List of publications.
2019 Lisa Bröder, August Andersson, Tommaso Tesi, Igor Semiletov, Örjan Gustafsson
Quantifying Degradative Loss of Terrigenous Organic Carbon in Surface Sediments Across the Laptev and East Siberian Sea
published pages: 85-99, ISSN: 0886-6236, DOI: 10.1029/2018gb005967
Global Biogeochemical Cycles 33/1 2019-09-04
2017 Patrik Winiger, August Andersson, Sabine Eckhardt, Andreas Stohl, Igor P. Semiletov, Oleg V. Dudarev, Alexander Charkin, Natalia Shakhova, Zbigniew Klimont, Chris Heyes, Örjan Gustafsson
Siberian Arctic black carbon sources constrained by model and observation
published pages: E1054-E1061, ISSN: 0027-8424, DOI: 10.1073/pnas.1613401114
Proceedings of the National Academy of Sciences 114/7 2019-09-04
2019 P. Winiger, T. E. Barrett, R. J. Sheesley, L. Huang, S. Sharma, L. A. Barrie, K. E. Yttri, N. Evangeliou, S. Eckhardt, A. Stohl, Z. Klimont, C. Heyes, I. P. Semiletov, O. V. Dudarev, A. Charkin, N. Shakhova, H. Holmstrand, A. Andersson, Ö. Gustafsson
Source apportionment of circum-Arctic atmospheric black carbon from isotopes and modeling
published pages: eaau8052, ISSN: 2375-2548, DOI: 10.1126/sciadv.aau8052
Science Advances 5/2 2019-09-04
2017 Irina I. Pipko, Svetlana P. Pugach, Igor P. Semiletov, Leif G. Anderson, Natalia E. Shakhova, Örjan Gustafsson, Irina A. Repina, Eduard A. Spivak, Alexander N. Charkin, Anatoly N. Salyuk, Kseniia P. Shcherbakova, Elena V. Panova, Oleg V. Dudarev
The spatial and interannual dynamics of the surface water carbonate system and air–sea CO<sub>2</sub> fluxes in the outer shelf and slope of the Eurasian Arctic Ocean
published pages: 997-1016, ISSN: 1812-0792, DOI: 10.5194/os-13-997-2017
Ocean Science 13/6 2019-09-04
2017 Natalia Shakhova, Igor Semiletov, Orjan Gustafsson, Valentin Sergienko, Leopold Lobkovsky, Oleg Dudarev, Vladimir Tumskoy, Michael Grigoriev, Alexey Mazurov, Anatoly Salyuk, Roman Ananiev, Andrey Koshurnikov, Denis Kosmach, Alexander Charkin, Nicolay Dmitrevsky, Victor Karnaukh, Alexey Gunar, Alexander Meluzov, Denis Chernykh
Current rates and mechanisms of subsea permafrost degradation in the East Siberian Arctic Shelf
published pages: , ISSN: 2041-1723, DOI: 10.1038/ncomms15872
Nature Communications 8/1 2019-09-04
2017 Tommaso Tesi, Marc C. Geibel, Christof Pearce, Elena Panova, Jorien E. Vonk, Emma Karlsson, Joan A. Salvado, Martin Kruså, Lisa Bröder, Christoph Humborg, Igor Semiletov, Örjan Gustafsson
Carbon geochemistry of plankton-dominated samples in the Laptev and East Siberian shelves: contrasts in suspended particle composition
published pages: 735-748, ISSN: 1812-0792, DOI: 10.5194/os-13-735-2017
Ocean Science 13/5 2019-09-04
2018 Robert B. Sparkes, Melissa Maher, Jerome Blewett, Ayça Doğrul Selver, Örjan Gustafsson, Igor P. Semiletov, Bart E. van Dongen
Carbonaceous material export from Siberian permafrost tracked across the Arctic Shelf using Raman spectroscopy
published pages: 3293-3309, ISSN: 1994-0424, DOI: 10.5194/tc-12-3293-2018
The Cryosphere 12/10 2019-09-04
2019 Sarah Conrad, Johan Ingri, Johan Gelting, Fredrik Nordblad, Emma Engström, Ilia Rodushkin, Per S. Andersson, Don Porcelli, Örjan Gustafsson, Igor Semiletov, Björn Öhlander
Distribution of Fe isotopes in particles and colloids in the salinity gradient along the Lena River plume, Laptev Sea
published pages: 1305-1319, ISSN: 1726-4189, DOI: 10.5194/bg-16-1305-2019
Biogeosciences 16/6 2019-09-04
2018 Jannik Martens, Birgit Wild, Christof Pearce, Tommaso Tesi, August Andersson, Lisa Bröder, Matt O’Regan, Martin Jakobsson, Martin Sköld, Laura Gemery, Thomas M. Cronin, Igor Semiletov, Oleg V. Dudarev, Örjan Gustafsson
Remobilization of old permafrost carbon to Chukchi Sea sediments during the end of the last deglaciation
published pages: , ISSN: 0886-6236, DOI: 10.1029/2018gb005969
Global Biogeochemical Cycles 2019-09-04
2019 Birgit Wild, August Andersson, Lisa Bröder, Jorien Vonk, Gustaf Hugelius, James W. McClelland, Wenjun Song, Peter A. Raymond, Örjan Gustafsson
Rivers across the Siberian Arctic unearth the patterns of carbon release from thawing permafrost
published pages: 10280-10285, ISSN: 0027-8424, DOI: 10.1073/pnas.1811797116
Proceedings of the National Academy of Sciences 116/21 2019-09-04
2018 Svetlana P. Pugach, Irina I. Pipko, Natalia E. Shakhova, Evgeny A. Shirshin, Irina V. Perminova, Örjan Gustafsson, Valery G. Bondur, Alexey S. Ruban, Igor P. Semiletov
Dissolved organic matter and its optical characteristics in the Laptev and East Siberian seas: spatial distribution and interannual variability (2003&ndash;2011)
published pages: 87-103, ISSN: 1812-0792, DOI: 10.5194/os-14-87-2018
Ocean Science 14/1 2019-09-04
2017 Kirsi Keskitalo, Tommaso Tesi, Lisa Bröder, August Andersson, Christof Pearce, Martin Sköld, Igor P. Semiletov, Oleg V. Dudarev, Örjan Gustafsson
Sources and characteristics of terrestrial carbon in Holocene-scale sediments of the East Siberian Sea
published pages: 1213-1226, ISSN: 1814-9332, DOI: 10.5194/cp-13-1213-2017
Climate of the Past 13/9 2019-06-13
2017 Joan A. Salvadó, Lisa Bröder, August Andersson, Igor P. Semiletov, Örjan Gustafsson
Release of Black Carbon From Thawing Permafrost Estimated by Sequestration Fluxes in the East Siberian Arctic Shelf Recipient
published pages: 1501-1515, ISSN: 0886-6236, DOI: 10.1002/2017GB005693
Global Biogeochemical Cycles 31/10 2019-06-13
2017 Alexander N. Charkin, Michiel Rutgers van der Loeff, Natalia E. Shakhova, Örjan Gustafsson, Oleg V. Dudarev, Maxim S. Cherepnev, Anatoly N. Salyuk, Andrey V. Koshurnikov, Eduard A. Spivak, Alexey Y. Gunar, Alexey S. Ruban, Igor P. Semiletov
Discovery and characterization of submarine groundwater discharge in the Siberian Arctic seas: a case study in the Buor-Khaya Gulf, Laptev Sea
published pages: 2305-2327, ISSN: 1994-0424, DOI: 10.5194/tc-11-2305-2017
The Cryosphere 11/5 2019-06-13
2017 Jorien E. Vonk, Tommaso Tesi, Lisa Bröder, Henry Holmstrand, Gustaf Hugelius, August Andersson, Oleg Dudarev, Igor Semiletov, Örjan Gustafsson
Distinguishing between old and modern permafrost sources in the northeast Siberian land–shelf system with compound-specific <i>δ</i><sup>2</sup>H analysis
published pages: 1879-1895, ISSN: 1994-0424, DOI: 10.5194/tc-11-1879-2017
The Cryosphere 11/4 2019-06-13
2017 Irina I. Pipko, Svetlana P. Pugach, Igor P. Semiletov, Leif G. Anderson, Natalia E. Shakhova, Örjan Gustafsson, Irina A. Repina, Eduard A. Spivak, Alexander N. Charkin, Anatoly N. Salyuk, Kseniia P. Shcherbakova, Elena V. Panova, Oleg V. Dudarev
The spatial and interannual dynamics of the surface water carbonate system and air–sea CO<sub>2</sub> fluxes in the outer shelf and slope of the Eurasian Arctic Ocean
published pages: 997-1016, ISSN: 1812-0792, DOI: 10.5194/os-13-997-2017
Ocean Science 13/6 2019-06-13
2016 Joan A. Salvadó, Tommaso Tesi, Marcus Sundbom, Emma Karlsson, Martin Kruså, Igor P. Semiletov, Elena Panova, Örjan Gustafsson
Contrasting composition of terrigenous organic matter in the dissolved, particulate and sedimentary organic carbon pools on the outer East Siberian Arctic Shelf
published pages: 6121-6138, ISSN: 1726-4189, DOI: 10.5194/bg-13-6121-2016
Biogeosciences 13/22 2019-06-13
2018 Lisa Bröder, Tommaso Tesi, August Andersson, Igor Semiletov, Örjan Gustafsson
Bounding cross-shelf transport time and degradation in Siberian-Arctic land-ocean carbon transfer
published pages: , ISSN: 2041-1723, DOI: 10.1038/s41467-018-03192-1
Nature Communications 9/1 2019-06-13

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