Article
Microbiology
Soohyun Kim, Kwanwoo Kim, Naeun Jo, Hyo-Keun Jang, So-Hyun Ahn, Janghan Lee, Howon Lee, Sanghoon Park, Dabin Lee, Dean A. Stockwell, Terry E. Whitledge, Sang-Heon Lee
Summary: The understanding of primary production of phytoplankton in the Kara Sea, Laptev Sea, and East Siberian Sea is limited. In order to address this knowledge gap, three NABOS expeditions were conducted, measuring in situ primary production rates and examining their controlling factors. The study found significant spatial and regional differences in primary production rates, with the East Siberian Sea having a lower rate compared to the Kara Sea and Laptev Sea, likely due to regional differences in freshwater content.
Article
Geosciences, Multidisciplinary
B. Bukhanov, E. Chuvilin, M. Zhmaev, N. Shakhova, E. Spivak, O. Dudarev, A. Osadchiev, M. Spasennykh, I. Semiletov
Summary: Understanding the features of sediment temperature and physical properties in the shelf and continental slope areas of the Russian Arctic seas is crucial for assessing the current condition of subsea permafrost and gas hydrates stability zone.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Environmental Sciences
Valentina Sattarova, Kirill Aksentov, Anatolii Astakhov, Xuefa Shi, Limin Hu, Alexandr Alatortsev, Anna Mariash, Elena Yaroshchuk
Summary: The analysis of trace metals in sediments of the Laptev and East Siberian Seas showed high concentrations of Cr, Zn, Ni, Cu, As, and Cd, with the increased Cd concentration possibly stemming from the highly productive waters of the Bering Sea. Contamination indices revealed no contamination by Cr, Ni, Cu, Zn, Pb, and Cd at any sampling locations, but slight As enrichment was observed.
MARINE POLLUTION BULLETIN
(2021)
Article
Ecology
Jens A. Hoelemann, Bennet Juhls, Dorothea Bauch, Markus Janout, Boris P. Koch, Birgit Heim
Summary: Permafrost degradation in major Siberian river catchments, combined with higher precipitation in a warming climate, could increase the flux of terrestrially derived dissolved organic matter into the Arctic Ocean. A study reveals that conservative mixing of high-tDOM river water and sea-ice meltwater with low-tDOM seawater is the major factor controlling the surface distribution of tDOM in the Laptev Sea and East Siberian Sea.
Article
Environmental Sciences
Xiaole Sun, Christoph Humborg, Carl-Magnus Morth, Volker Bruchert
Summary: This study evaluates the benthic nutrient regeneration in the outer Laptev and East Siberian shelf, highlighting significant benthic nitrogen loss relative to DIP and DSi. The estimation of benthic fluxes might be underestimated, and the proportion of nutrients derived from sediments is expected to increase with increasing primary production in the future warmer Arctic continental shelf.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Article
Environmental Sciences
Alexander Osadchiev, Dmitry Frey, Eduard Spivak, Sergey Shchuka, Natalia Tilinina, Igor Semiletov
Summary: This study focuses on the freshened surface layer (FSL) in the Laptev and East-Siberian seas, showing that the morphology of deltaic rivers and estuaries significantly impact the distribution of freshwater and the extent of the FSL. Wind conditions play a crucial role in determining the spreading and inter-annual variability of the FSL.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
E. Koltovskaya, I. A. Nemirovskaya
Summary: This study investigated the distribution and flux magnitude of suspended particulate matter (SPM) in the Kara and Laptev Seas. The composition of SPM was analyzed, revealing a predominance of allochthonous material. The findings contribute to our understanding of SPM dynamics in these regions.
Article
Environmental Sciences
Anastasia N. Drozdova, Ivan N. Krylov, Andrey A. Nedospasov, Elena G. Arashkevich, Timur A. Labutin
Summary: The East Siberian Sea is an area with high biogeochemical activity, characterized by unique dissolved organic carbon behavior and spectral distribution. Compared to the Laptev Sea, the shelf waters of the East Siberian Sea contain higher levels of protein-like and marine humic-like fluorescent substances.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
F. Matsubara, B. Wild, J. Martens, A. Andersson, R. Wennstrom, L. Broder, O. Dudarev, I Semiletov, O. Gustafsson
Summary: Global warming leads to the thawing of permafrost, resulting in the increased release of terrigenous organic matter to the Arctic Ocean. The degradation of this organic matter contributes to greenhouse gas emissions and ocean acidification, but the vulnerability of different components is not well known. This study investigates the degradation dynamics of terrigenous organic matter in the East Siberian Arctic Shelf, revealing differences in degradation between different chemical compounds.
GLOBAL BIOGEOCHEMICAL CYCLES
(2022)
Article
Engineering, Environmental
Peng Ren, Chunle Luo, Hongmei Zhang, Hayley Schiebel, Meredith G. Hastings, Xuchen Wang
Summary: Deposition of atmospheric particulates plays a significant role in transporting materials from land to the ocean, impacting climate and nutrient cycling. This study reveals that old organic carbon (OC) in aerosols contributes significantly to marginal sea sediments, serving as a crucial sink for atmospheric carbon dioxide.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Biodiversity Conservation
Lidiya Vasilenko, Yuriy Vasilenko, Aleksandr Bosin, Ira Tsoy, Xuefa Shi, Yanguang Liu
Summary: The study presents new data on the taxonomic diversity and content of microplanktonic organisms in Arctic sediments. Radiolarian skeletons were found in the Laptev Sea and Arctic Ocean, while tintinnid ciliate loricae were mainly found in the coastal shelf zone. These findings contribute to knowledge on Arctic biodiversity and can be used to monitor ecological and paleoceanographic changes in the region.
Article
Environmental Sciences
Siquan Wang, Guanghui Ding, Yihao Liu, Zhiyuan Dou, Hanzhe Chen, Miaolei Ya, Xiaoping Lin, Qin Li, Yongyu Li, Xinhong Wang
Summary: This study analyzed emerging per-and polyfluoroalkyl substances (PFASs) and traditional organochlorine pesticides (OCPs), polycyclic aromatic hydrocarbons (PAHs) in the marginal seas of China to investigate their occurrence, transport, and phase partitioning. It is the first study to examine the influence of organic carbon (OC) and element carbon (EC) on particulate emerging pollutants in seawater. The results show that the concentrations of PFASs, OCPs, and PAHs in the seawater varied and were generally higher in the northern East China Sea than in the southern East China Sea and South China Sea, potentially due to river discharges and land sources in the Yangtze River Delta. The Yellow Sea Coastal Current and Yangtze River Dilute Water were identified as driving factors for the transport of contaminants from north to south marginal seas. Positive correlations were observed between EC and PAHs, indicating co-emission during combustion. Additionally, positive correlations were found between OC, EC, and Log K-d for certain compounds, suggesting that OC and EC promote the partitioning of these high oleophilic compounds to suspended particles.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Oceanography
Valentina Sattarova, Anatolii Astakhov, Kirill Aksentov, Xuefa Shi, Limin Hu, Yanguang Liu, Dmitry Polyakov, Alexandr Alatortsev, Olga Kolesnik
Summary: Deciphering the origin of sedimentary material in the Arctic is important for understanding transport and sedimentation processes. Rare earth elements (REEs) can serve as indicators of sources, conditions, and processes. This study examined the distribution of REE sources in sediments from the East Siberian Arctic Shelf and found that the REEs came from the eroded Yedoma complex along the coast. The findings have implications for studying ice dynamics and for reconstructing the Central Arctic's lithostratigraphy and paleoceanography.
CONTINENTAL SHELF RESEARCH
(2023)
Article
Biodiversity Conservation
Maria S. Obrezkova, Ira B. Tsoy, Anastasya E. Kolyada, Xuefa Shi, Yanguang Liu
Summary: Our research was focused on the impact of recent warming in the Arctic on diatoms, the main producers in the Eastern Arctic seas. We analyzed the qualitative concentrations and quantitative ratio of diatoms in surface sediments from various Arctic regions, as well as the ecological structure of diatom assemblages. The results showed significant changes in species composition and quantitative ratio in the Arctic Ocean and the Laptev Sea and East Siberian Sea sediments, but no significant changes in the Chukchi Sea sediments. These transformations were linked to changes in temperature, current flow, salinity, ice melting, and ice-free periods associated with global warming in recent decades.
Review
Oceanography
Oleg Dudarev, Alexander Charkin, Natalia Shakhova, Aleksey Ruban, Denis Chernykh, Jorien Vonk, Tommaso Tesi, Jannik Martens, Irina Pipko, Svetlana Pugach, Elena Gershelis, Andrey Leusov, Andrey Grinko, Orjan Gustafsson, Igor Semiletov
Summary: This study investigates the interannual variability and spatial distribution of suspended particulate matter (SPM) in the East Siberian Sea. The results show significant differences in SPM distribution and elemental-isotopic characteristics between the western and eastern biogeochemical provinces of the sea. The atmospheric circulation and water transport play a role in determining the displacement of the biogeochemical border between the provinces.
PROGRESS IN OCEANOGRAPHY
(2022)
Article
Environmental Sciences
Laura Sanchez-Garcia, Maria Angeles Lezcano, Daniel Carrizo, Rita Severino, Miriam Garcia-Villadangos, Sherry L. Cady, Kim Warren-Rhodes, Nathalie A. Cabrol, Victor Parro
Summary: Subaerial hydrothermal systems are potential environments for the origin of life on Earth and Mars, offering a unique atmosphere-hydrosphere-lithosphere interface. The sinter deposits in these systems are promising targets for searching extraterrestrial life signs. This study investigates the effects of silicification on the preservation of lipid biomarkers using samples from El Tatio. The data reveals the degradation rate of lipid biomarkers and informs the time window for recovering signs of past life.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Microbiology
Alexander S. Savvichev, Igor I. Rusanov, Vitaly V. Kadnikov, Alexey V. Beletsky, Elena E. Zakcharova, Olga S. Samylina, Pavel A. Sigalevich, Igor P. Semiletov, Nikolai V. Ravin, Nikolay V. Pimenov
Summary: Bottom sediments at methane discharge sites of the Laptev Sea shelf were investigated. The rates of microbial methanogenesis and methane oxidation were measured, and the communities responsible for these processes were analyzed. Methane content in the sediments varied from 0.9 to 37 mu mol CH4 dm(-3). Methane carbon isotopic composition (delta C-13-CH4) varied from -98.9 to -77.6 parts per thousand, indicating its biogenic origin. The rates of hydrogenotrophic methanogenesis were low (0.4-5.0 nmol dm(-3) day(-1)). Methane oxidation rates varied from 0.4 to 1.2 mu mol dm(-3) day(-1) at the seep stations. Four lineages of anaerobic methanotrophic archaea (ANME) (1, 2a-2b, 2c, and 3) were found in the deeper sediments at the seep stations along with sulfate-reducing Desulfobacteriota. The ANME-2a-2b clade was predominant among ANME. Aerobic ammonium-oxidizing Crenarchaeota (family Nitrosopumilaceae) predominated in the upper sediments along with heterotrophic Actinobacteriota and Bacteroidota, and methaneotrophs of the classes Alphaproteobacteria (Methyloceanibacter) and Gammaproteobacteria (families Methylophilaceae and Methylomonadaceae). Members of the genera Sulfurovum and Sulfurimonas occurred in the sediments of the seep stations. Methanotrophs of the classes Alphaproteobacteria (Methyloceanibacter) and Gammaproteobacteria (families Methylophilaceae and Methylomonadaceae) occurred in the sediments of all stations. The microbial community composition was similar to that of methane seep sediments from geographically remote areas of the global ocean.
Article
Archaeology
K. N. White, D. Chiasserini, R. Loynes, A. R. David, B. E. van Dongen, K. Drosou, R. Forshaw, S. Fraser, P. Causey-Freeman, J. Metcalfe, E. Murphy, M. Regan, P. J. Reimer, D. G. Tosh, A. Whetton, A. J. Freemont
Summary: Scientific examination of mummies provides insights into human ancestry, diet, disease, cultures, and societies. However, invasive methods have raised concerns. A minimally invasive approach using imaging techniques and biopsy sampling allows for the collection of valuable data without significant disturbance to the mummy. This study on Takabuti demonstrates the potential of such methods.
JOURNAL OF ARCHAEOLOGICAL SCIENCE-REPORTS
(2023)
Article
Geology
Lauren K. O'Connor, Emily Dearing Crampton-Flood, Rhodri M. Jerrett, Gregory D. Price, B. David A. Naafs, Richard D. Pancost, Paul McCormack, Aris Lempotesis-Davies, Bart E. van Dongen, Sabine K. Lengger
Summary: A study of fossil peats in Canada suggests that the average annual air temperature during the end of the Cretaceous and the beginning of the Paleogene varied, with the highest temperature reaching 29°C. The range of temperature change on land is greater than that derived from marine proxy records. These findings help us better understand the temperature changes on land during the critical period of dinosaur extinction and the rise of mammals.
Article
Engineering, Civil
Irina I. Pipko, Svetlana P. Pugach, Kseniia P. Shcherbakova, Igor P. Semiletov
Summary: Rivers play a crucial role in the carbon cycle in the Arctic. The study investigates the variations in dissolved organic carbon (DOC) concentrations and DOM composition in Siberian rivers and evaluates their relationship with carbonate chemistry. The findings provide valuable information for understanding the impact of climate change on biogeochemical cycles in the Arctic.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Lina Xie, Evgeniy Yakushev, Igor Semiletov, Andrey Grinko, Ivan Gangnus, Anfisa Berezina, Alexander Osadchiev, Igor Zhdanov, Alexander Polukhin, Julia Moiseeva, Darya Purgina, Irina Pipko, Svetlana Pugach, Oleg Dudarev, Zhenming Ge
Summary: Based on data collected from annual transects conducted from 2015-2020, this study explores the impact of River Lena plume dispersion on the hydrophysical and biogeochemical structure of the southeastern Laptev Sea. The results indicate that the spreading patterns of the plume play a crucial role in regulating local processes and show significant variation on both seasonal and interannual scales.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Engineering, Geological
Elena V. Gershelis, Alexey S. Ruban, Denis V. Chernykh, Natalina A. Poltavskaya, Igor P. Semiletov
Summary: Ongoing global warming leads to the accelerated release of organic carbon from permafrost to the Arctic shelf waters, which can be accumulated in sediments and undergo degradation and remineralization, resulting in significant environmental consequences. This study aims to assess the sources and degradation degree of terrigenous organic matter in the surface sediments of the Eastern Arctic seas. The hydrogen index values in modern marine sediments on the Eastern Arctic shelf are associated with the contribution of biolabile terrestrial organic matter, while other Arctic waters show a growing contribution of autochthonous organic matter. Moreover, there are significant deviations from the linear dependence in the d13C and HI/OI correlation, indicating a different geochemical regime in the Eastern Arctic seas.
BULLETIN OF THE TOMSK POLYTECHNIC UNIVERSITY-GEO ASSETS ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Sergey Nikiforov, Roman Ananiev, Martin Jakobsson, Evgeny Moroz, Sergey Sokolov, Nikolay Sorokhtin, Nikolay Dmitrevsky, Elena Sukhikh, Igor Chickiryov, Yulia Zarayskaya, Anatoly Razumovskiy, Igor Semiletov
Summary: Based on data acquired during cruises of the RV Akademik Nikolaj Strakhov in 2018-2021, the distribution of submarine glacial landforms in the central part of the Pechora shelf area is revealed. The extent of the ice sheet during the Last Glacial Maximum (LGM) is proposed based on moraines and the distribution of glacial lineations. The mapped glacial landforms indicate the presence of an ice sheet in the area, while the Pechora basin was characterized by a cryogenic subaerial landscape.
Article
Geosciences, Multidisciplinary
Nickolay Sorokhtin, Nikolay Kozlov, Igor Semiletov, Leopold Lobkovsky, Sergey Nikiforov, Dmitry Alekseev, Roman Ananiev
Summary: Studies have shown that the Keivy domain of the Baltic Shield was tectonically overlapped by adjacent microcontinents during regional collision processes in the Late Archean, resulting in the submergence of the continental crust and the formation of a median massif. The Keivy massif entered the cratonization regime and experienced intense denudation processes and sedimentary cover accumulation. These processes occurred during the formation of the first supercontinent and the Early Precambrian glaciation, leading to the accumulation of extensive stratiform deposits of alumina raw materials within the Keivy median massif.
Article
Geosciences, Multidisciplinary
Dmitry A. Alekseev, Andrey V. Koshurnikov, Alexey Yu. Gunar, Ermolay I. Balikhin, Igor P. Semiletov, Natalia E. Shakhova, Nikolay A. Palshin, Leopold I. Lobkovsky
Summary: By using 1D numerical modeling and field data, the capabilities of the time-domain electromagnetic method (TDEM) for subsea permafrost mapping are analyzed. The effect of the background resistivity structure on the accuracy of inversion models is studied for settings typical for the East Siberian Arctic Shelf. Synthetic response analysis and regularized inversion are used to assess sensitivity and uncertainties in the geometry and resistivity of the reconstructed permafrost layer, confirming the efficacy of TDEM technology for subsea permafrost imaging.
Article
Geosciences, Multidisciplinary
J. Muchowski, L. Arneborg, L. Umlauf, P. Holtermann, E. Eisbrenner, C. Humborg, M. Jakobsson, C. Stranne
Summary: Diapycnal mixing affects the vertical transport rates of salt, heat, and other dissolved substances, which are crucial for the overturning circulation and ecosystem functioning in marine systems. This study investigates the overall impact of non-tidal flow over multiple small-scale bathymetric features on a strongly-stratified density interface in a coastal region. The findings highlight the importance of rough small-scale bathymetric features for the vertical transport of salt in coastal areas.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Irina Pipko, Svetlana Pugach, Igor Semiletov, Oleg Konstantinov
Summary: This study assesses the dynamics of the seawater carbonate system, air-sea CO2 fluxes, and the corrosive waters in the East Siberian Sea. The eastern ESS is the main source of corrosive waters into the deep basin. This can potentially impact the ocean water ecosystem.
Article
Geosciences, Multidisciplinary
Denis Chernykh, Natalia Shakhova, Vladimir Yusupov, Elena Gershelis, Boris Morgunov, Igor Semiletov
Summary: This paper presents an improved approach to study seafloor seepages in the Arctic coastal zone using a calibrated echosounder. The study recorded periods of increased activity of rising gas bubbles from the seabed in the East Siberian Arctic Shelf. The quantitative estimates of methane flux at the water column levels suggest that the CH4 transported by rising bubbles can be emitted into the atmosphere through ice features in the water/sea ice interface.
Article
Geosciences, Multidisciplinary
Martine Lizotte, Bennet Juhls, Atsushi Matsuoka, Philippe Massicotte, Gaelle Mevel, David Obie James Anikina, Sofia Antonova, Guislain Becu, Marine Beguin, Simon Belanger, Thomas Bosse-Demers, Lisa Broeder, Flavienne Bruyant, Gwenaelle Chaillou, Jerome Comte, Raoul-Marie Couture, Emmanuel Devred, Gabriele Deslongchamps, Thibaud Dezutter, Miles Dillon, David Doxaran, Aude Flamand, Frank Fell, Joannie Ferland, Marie-Helene Forget, Michael Fritz, Thomas J. Gordon, Caroline Guilmette, Andrea Hilborn, Rachel Hussherr, Charlotte Irish, Fabien Joux, Lauren Kipp, Audrey Laberge-Carignan, Hugues Lantuit, Edouard Leymarie, Antonio Mannino, Juliette Maury, Paul Overduin, Laurent Oziel, Colin Stedmon, Crystal Thomas, Lucas Tisserand, Jean-Eric Tremblay, Jorien Vonk, Dustin Whalen, Marcel Babin
Summary: Climate warming in the Arctic is expected to change the distribution and dynamics of carbon in frozen grounds. Thawing permafrost in the Mackenzie River watershed releases organic matter into the Arctic Ocean, but its fate remains poorly understood. Field expeditions were conducted to study this process in the Mackenzie Delta region and southern Beaufort Sea, with the collaboration of local communities and the measurement of various physical, chemical, and biological variables.
EARTH SYSTEM SCIENCE DATA
(2023)
Article
Geosciences, Multidisciplinary
Niek Jesse Speetjens, Gustaf Hugelius, Thomas Gumbricht, Hugues Lantuit, Wouter R. Berghuijs, Philip A. Pika, Amanda Poste, Jorien E. Vonk
Summary: ARCADE is an integrated database of over 40,000 catchments that drain into the Arctic Ocean, ranging in size from 1 to 3.1 x 106 km2. It includes numerous small catchments experiencing significant climatic warming and storing large amounts of soil carbon. ARCADE is a key tool for monitoring the pan-Arctic across scales.
EARTH SYSTEM SCIENCE DATA
(2023)
