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Performance monitoring of the wastewater system of Bharati Station, Antarctica Polar Sci. (IF 1.8) Pub Date : 2024-03-11 Rahul Kumar, N.S. Magesh, Vivek Kumar, Kirti Ranjan Das, Ariz Ahmad, Vikas Singh, Partha Sarathi Majhi, Ravi Mishra, Anand K. Singh, Shailendra Saini, Yogesh Ray
The untouched condition of Antarctica's environment is a result of its inherent absence of human activity. Nevertheless, with the introduction of scientific research stations and human presence, a considerable volume of wastewater has been produced by these research facilities. The wastewater needs to be treated before discharge and has strict rules and regulations set by the Antarctic Treaty (Annexure
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Regional ensemble of CMIP6 global climate models for Sakha (Yakutia) Republic, Northern Eurasia Polar Sci. (IF 1.8) Pub Date : 2024-03-06 Nikita I. Tananaev
Future climate projections based on multi-model ensemble approach are seen as more reliable, but not all models are equally performant at reproducing climate features at a regional scale. An optimal regional GCM ensemble was developed for Sakha (Yakutia) Republic based on error statistics and spatial correlation metrics. Historical Coupled Model Intercomparison Project, version 6 (CMIP6) simulations
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Reducing arctic black carbon emissions: Features of national regulatory systems as a key factor Polar Sci. (IF 1.8) Pub Date : 2024-02-24 Daiju Narita, Kazuki Motohashi
Black carbon is an air pollutant that contributes to Arctic warming, and its control is the subject of multiple international institutions in the region. However, the potential for cost-effective reduction of black carbon emissions in the region is conditioned by the features of the national regulatory systems in relevant countries. This study conducted a comparative analysis of national pollution
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Prospects for the development of the Northern Sea Route after February 2022: An analysis of Russia's policy in the new conditions Polar Sci. (IF 1.8) Pub Date : 2024-02-13 Diana Mikhailova, Shinichiro Tabata
This paper aims to evaluate Russian state policy towards the development of the Northern Sea Route with all the political, economic, and financial challenges that followed the war between Russia and Ukraine after February 2022. Much attention has been paid to the new plan of the development of the Northern Sea Route until 2035, adopted by the Government in August 2022 since this is a strategic document
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Brood patch size as a field indicator for feather mercury concentration, but not plastic ingestion, in a harvested seabird of the high Arctic: The little auk Alle alle Polar Sci. (IF 1.8) Pub Date : 2024-02-05 Mayuko Otsuki, Monica Ogawa, Yutaka Watanuki, Yoko Mitani, Mayumi Ishizuka, Yoshinori Ikenaka, Jean-Baptiste Thiebot
Northwest Greenland societies substantially rely on subsistence harvest, a part of which consists of little auks (), an abundant seabird in the Arctic. Although little auks inhabit remote regions, they are prone to accumulating mercury (Hg) in their tissues and ingesting plastics from their environment while feeding. This entails a broad array of health-related issues, from the birds themselves to
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Contribution of cryoconite holes in the supraglacial discharge of bioavailable iron in Larsemann Hills, East Antarctica Polar Sci. (IF 1.8) Pub Date : 2024-02-01 G. Samui, A. Sanyal, R. Antony, C.M. Laluraj, M. Thamban
Supraglacial discharge of limiting micronutrients such as iron (Fe) into high-nutrient low-chlorophyll (HNLC) regions like the Southern Ocean has recently drawn global attention. In this study, we aim to understand the contribution of cryoconite holes (comprising a meltwater column with an underlying layer of sediment) to the discharge of Fe through the glacier runoff. Cryoconite hole meltwater collected
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Russia lacks the financial resources to improve living standards in the Arctic: A case of the Sakha Republic Polar Sci. (IF 1.8) Pub Date : 2024-01-24 Kazuho Yokogawa
This paper focuses on the Sakha Republic in the Russian Far East as one of the Arctic regions. Russia's Arctic policy gives priority to improving the living standard and quality of life of Arctic inhabitants. I examine the feasibility of Russia's Arctic policy in the context of economic and social situation in the Sakha Republic and fiscal capacity of local governments, which are responsible for the
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Cold winds in the north: Three perspectives on the impact of Russia's war in Ukraine on security and international relations in the Arctic Polar Sci. (IF 1.8) Pub Date : 2024-01-24 Paal Sigurd Hilde, Fujio Ohnishi, Magnus Petersson
The article presents three perspectives on how Russia's full-scale invasion of Ukraine has impacted international relations and security in the Arctic: a North European, a pan-Arctic and a Japanese-cum-North Pacific. We find a significant impact on the security situation in Northern Europe, including the European Arctic, notably in the Finish and Swedish decisions to join NATO. The consequences have
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Assessment of the human footprint in Antarctica: A case study Larsemann Hills Polar Sci. (IF 1.8) Pub Date : 2024-01-19 Sergey Kakareka, Sviatlana Salivonchyk
The article is devoted to assessment of the anthropogenic influence in the Larsemann Hills, East Antarctica. The emission of the main pollutants and greenhouse gases from diesel generators used at Antarctic stations are estimated for the period since the beginning of the development of the oasis area (from 1986 to 2019). It is shown that SO2 emissions decreased in 2019 compared to peak values in 1990
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An estimation of atmospheric attenuation on an earth-space radio link operating at Ka-band over Larsemann hills area of Antarctica Polar Sci. (IF 1.8) Pub Date : 2024-01-18 Sahal Mohammed M.N., Chinmay Kumar Patra, Sudhakar Kandukuri, Vivek Kumar, Vijay Kumar Soni
The National Remote Sensing Centre (NRSC) has established its ground station named Antarctica Ground Station for Earth Observation Satellites (AGEOS) at Bharati station located at Larsemann hills area of Antarctica for the tracking and data acquisition from polar orbiting satellites. A communication link through a geostationary satellite in C-band is being used for transferring data to the mainland
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On the response of the mesopause region over an Indian Antarctic station Bharati to the geomagnetic storm of 23–24 March 2023 Polar Sci. (IF 1.8) Pub Date : 2024-01-17 Navin Parihar, Anand Kumar Singh, Saranya Padincharapad, Shailendra Saini
We report, in this work, the changes in the thermal structure of the mesosphere-lower thermosphere (MLT) region over an Indian Antarctic station Bharati (69.4° S, 76.2° E, CGM coordinates 75° S, 97° E) brought about by an intense geomagnetic storm of 23–24 March 2023 (Dst ∼ −155 nT). We use the temperature and OH airglow measurements of the Sounding of the Atmosphere using Broadband Emission Radiometry
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Thermal germination characteristics of three High Arctic plants: Implications for their response to climate warming Polar Sci. (IF 1.8) Pub Date : 2024-01-04 Soshi Osaki, Masaki Uchida, Takayuki Nakatsubo
Although temperature plays a crucial role in governing seed reproduction in High Arctic plants, little is known about the germination response of these plants to climate warming. We conducted a germination experiment to examine the thermal germination characteristics of three common High Arctic plant species in Svalbard: Dryas octopetala, Oxyria digyna, and Salix polaris. We exposed the seeds to two
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Phytoplankton community structure during the melting phase of the land-fast ice in Prydz Bay, east Antarctica Polar Sci. (IF 1.8) Pub Date : 2024-01-04 Pratiksha D. Deshmukh, Jenson V. George, Ravidas K. Naik, Shramik M. Patil, Melena Soares, B. Ajay, N. Anilkumar
Phytoplankton, the primary producers of all aquatic systems, form the base of the marine food web. Any change in the environmental settings of the given ecosystem will affect the phytoplankton community structure of the region. In the present work, water sampling was carried out from the poorly explored polar region, beneath the sea ice during the melting phase of land-fast ice near Indian Antarctic
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Investigation of background radiation levels and environmental radioactivity around Bharati Station, Larsemann Hills in east Antarctica-an overview Polar Sci. (IF 1.8) Pub Date : 2024-01-03 A.K. Bakshi, Rupali Pal, Jis Romal, B.K. Sahoo, Saurabh Garg, B.K. Sapra
Study on the measurement of background radiation level in and around Bharati station, Larsemann Hills region of East Antarctica was taken up using different types of detectors. The radiation levels due to cosmogenic (especially neutron) and terrestrial origin (gamma and neutron) and natural radioactivity due to presence of primordial radionuclide in the samples of soil, rock, lake water, ice and air
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Important factors affecting transportation for shippers and potential demand for the Northeast Passage: A conjoint analysis of Japan Polar Sci. (IF 1.8) Pub Date : 2024-01-01 Shinichi Yamaguchi, Kei Komuro, Shinnosuke Tanabe, Hajime Yamaguchi
This study utilized choice-based conjoint analysis, along with conditional logit to identify the following three research questions: RQ1: Which factor of the route is important for sippers in marine transport? RQ2: What is the potential demand for the NEP? How does the shipping cost alter the demand? RQ3: Which industry exhibits a high potential demand for the NEP? According to the results, Shipping
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Occurrence of Sanionia uncinata sporophytes on King George island, Antarctica: Exploring possible links to climate change Polar Sci. (IF 1.8) Pub Date : 2023-12-28 Maria Victória Magalhães de Vargas, Sara Navarrete Bohi Goulart, Guilherme Afonso Kessler de Andrade, Rafael Plá Matielo Lemos, Margéli Pereira de Albuquerque, Lorena Ferreira Peixoto, Ana Laura Pereira Lourenço, Mariana Pulrolnik Parrillo de Oliveira, Stephan Machado Dohms, Dafne Adriana Abreu dos Anjos, Marcelo Henrique Soller Ramada, Filipe de Carvalho Victoria
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Scientific research and collaboration in Antarctica: Türkiye's engagement from a science diplomacy perspective Polar Sci. (IF 1.8) Pub Date : 2023-12-24 Derya Buyuktanir Karacan, Burcu Ozsoy, Dilara Zengin Okay
The Antarctic Peninsula is one of the most affected regions by global climate change, requiring a multinational and collaborative effort of concerted actions guided by scientific principles. Science diplomacy has been embraced by policymakers and various stakeholders as a promising approach in international and global politics to tackle this issue and manage Antarctica's governance peacefully through
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Ice ridge evolution: Investigation in-situ and computer simulations Polar Sci. (IF 1.8) Pub Date : 2023-12-25 Oleg Andreev, Victor Kharitonov
The article presents a two-dimensional three-layer non-stationary thermodynamic model allowing to calculate the annual variation (thermodynamic evolution) of the ice ridge using external meteorological and hydrological parameters as well as the information on the initial ice ridge porosity. For the test model simulation, the results of the study of morphometric characteristics of the ice ridge carried
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Soil organic matter and biogenic-abiogenic interactions in soils of Larsemann Hills and Bunger Hills, East Antarctica Polar Sci. (IF 1.8) Pub Date : 2023-12-16 Ivan Alekseev, Evgeny Abakumov
Although Antarctic soils are usually described as weakly developed, recent studies indicated the significant variability in soil forming conditions across the sixth continent as well as considerable diversity of soils. The identification of pedogenetic processes in Antarctica is crucial for understanding not only the current state of its environment, but also for better understanding of soil development
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Characterization and discrimination of tundra plant leaves by Attenuated Total Reflection Fourier transform infrared spectroscopy Polar Sci. (IF 1.8) Pub Date : 2023-12-16 Takashi Osono, Weitong Lin, Motohiro Hasegawa, Masaki Uchida
Attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy is a powerful tool for investigating the biochemical fingerprint of plants, but its applicability to tundra plant leaves has yet to be addressed. The present study aimed to apply ATR-FTIR measurement to characterize tundra plant leaves and to discriminate these among plant species with different growth forms. The ATR-FTIR
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Bacterial community structure, adaptations and prevalence of antimicrobial resistance in bacteria from Antarctica: A review Polar Sci. (IF 1.8) Pub Date : 2023-12-13 Sonia Tamang, Prayatna Sharma, Santosh Kumar, Nagendra Thakur
Antarctica serves as an ideal prototype to study past climatic condition as the ice core records dates back to 100,000 years. Microbiological research on ice core has opened a doorway to our understanding on biodiversity and its contribution to the frozen ecosystem. In this review, the ice core bacterial diversity of East and West Antarctica has been documented. Cold-adapted bacteria hold immense potential
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Editorial: Research advances from Larsemann Hills, Antarctica: International cooperation and future prospects Polar Sci. (IF 1.8) Pub Date : 2023-12-10 Anand K. Singh, Shailendra Saini, Yogesh Ray, Svetlana Grigoreva, Xiangbin Cui, Xianglan Li, Rahul Mohan, M. Javed Beg, Rasik Ravindra
In the Larsemann Hills, three countries – Russia, China, and India – maintain year-round stations, while Australia operates a summer facility. These countries engage in diverse scientific research in the Larsemann Hills and the surrounding areas. The unprecedented cooperation resulted in the International Conference on Antarctic Research (ICAR) at Bharati station in 2020. Additionally, the BRICS working
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Critical seasonal conditions in the reindeer-herding year: A synopsis of factors and events in Fennoscandia and northwestern Russia Polar Sci. (IF 1.8) Pub Date : 2023-11-18 Roza Laptander, Tim Horstkotte, Joachim Otto Habeck, Sirpa Rasmus, Teresa Komu, Heidrun Matthes, Hans Tømmervik, Kirill Istomin, Jussi T. Eronen, Bruce C. Forbes
In this article, we identify what herders in Fennoscandia and northwestern Russia see as critical conditions and events in the annual reindeer herding cycle. Indigenous Sámi and Yamal reindeer herders identify eight seasons, each of which has crucial importance in its own way. Differences in perception between Fennoscandian and northwestern Russian reindeer herders about good and bad seasonal conditions
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Thermotectonic evolution of the Rauer Group and Vestfold Hills in Prydz Bay: Implications for Neoproterozoic assembly of the East Antarctic shield Polar Sci. (IF 1.8) Pub Date : 2023-11-15 Sandro Chatterjee, Aishi Debnath, Suvankar Samantaray, Devsamridhi Arora, Soham Dey, Saibal Gupta, Naresh Chandra Pant
The Rauer Group and Vestfold Hills are critical components of the East Antarctic Shield and are believed to have been parts of the supercontinents Rodinia and Gondwana. The Rauer Group is characterized by Archean to Pan-African thermal history, while the Pan-African signature in the Vestfold Hills is restricted to its southwestern margin. The correlation between the Rauer Group and Vestfold Hills remains
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Differences in iodine chemistry over the Antarctic continent Polar Sci. (IF 1.8) Pub Date : 2023-11-08 Anoop S. Mahajan, Shrutika Wagh, Rafael P. Fernandez, Surendra Singh, Silvia Bucci, Alfonso Saiz-Lopez
High concentrations of iodine oxide (IO) have been reported over west Antarctica, with areas around the Weddell Sea showing a peak in spring. However, stations in east Antarctica show much lower values during summer, although observations over spring are still missing. Here, we present the first year-long observations of IO outside the Weddell Sea region using a multi-axis differential optical absorption
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Atmospheric aerosol optical properties and trends over Antarctica using in-situ measurements and MERRA-2 aerosol products Polar Sci. (IF 1.8) Pub Date : 2023-11-01 Hareef Baba Shaeb Kannemadugu, Prijith Sudhakaran Syamala, Alok Taori, Rajashree Vinod Bothale, Prakash Chauhan
Columnar aerosol loading and surface level atmospheric black carbon (BC) concentration over the Antarctic are examined using the measurements carried out at the Indian Antarctic stations, Bharati and Maitri, as part of the 36th Indian Scientific Expedition (2016–17) to Antarctica (ISEA). The mean aerosol optical depth (AOD) at wavelength 500 nm at Bharati is observed to be 0.101 ± 0.01, whereas that
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Evaluation of meteorological characteristics and the influence of the Southern Annular Mode at newly established Bharati Station, East Antarctica Polar Sci. (IF 1.8) Pub Date : 2023-10-31 Vivek Kumar, Sanjay Bist, Rahil Akram, Anikender Kumar, Vijay Kumar Soni, Sunny Chug
The Indian Antarctic program, a multi-disciplinary and multi-institutional program initiated in 1981 with the first expedition to Antarctica, has been instrumental in advancing our understanding of Antarctic meteorology and its global climate implications. This study focuses on the latest meteorological characteristics of newly established research base Bharati aiming to unravel the climate dynamics
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Spatio-temporal variability of Atmospheric CO2 and CH4 concentrations over Antarctica using Ground and Space-based measurements Polar Sci. (IF 1.8) Pub Date : 2023-10-31 Mahesh Pathakoti, Mahalakshmi D.V., Sreenivas Gaddamidi, Alok Taori, Venkata Ramana Muvva, Rajashree Vinod Bothale, Ibrahim Shaik, P. Raja, Prakash Chauhan
The present study reports on the variability of atmospheric carbon dioxide (CO2) and methane (CH4) concentrations over Antarctica using data collected during the 2015–2016 and 2016–2017 as part of the Indian Scientific Expedition to Antarctica (ISEA). During the austral summer (January–March), this study examined the spatio-temporal variability in atmospheric CO2 and CH4 concentrations at the Indian
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Simultaneous observations of atmospheric vertical potential gradient from coastal Antarctic stations Bharati and Maitri Polar Sci. (IF 1.8) Pub Date : 2023-10-31 Krishnamoorthy Jeeva, Geeta Vichare, Gopi K. Seemala, Atul S. Kulkarni, Elango Paramasivan, Subrata Moulik, Anoop K. Soman, Pranjal Saikia
Simultaneous observations of the atmospheric electric potential gradient (PG) at Bharati and Maitri stations were studied from 2014 to 2016. A new regional diurnal pattern of fair-weather PG for the coastal Antarctic region, perhaps the ubiquitous characteristics of the PG for the coastal Antarctic region, has been identified. This pattern has a significant broad minimum around noon hours. It is around
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Simulation of crude oil slick on ice infested sea water Polar Sci. (IF 1.8) Pub Date : 2023-10-20 Hosseinreza Abbasi, Raed Lubbad
A three-dimensional numerical model based on the smoothed particle hydrodynamics (SPH) method is utilized to model such interactions. The effects from air and water are well captured using suitable force components and without explicit inclusion of air and water phases. This reduces the four-phase SPH model into a two-phase model, significantly reducing computational costs and potentially enabling
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Lichens of Larsemann Hills and adjacent oases in the area of Prydz Bay (Princess Elizabeth Land and MacRobertson Land, Antarctica) Polar Sci. (IF 1.8) Pub Date : 2023-10-20 Mikhail Andreev (Mихаил АНДРЕЕВ)
The lichen flora of coastal (Larsemann Hills, Landing Bluff, Rouer Islands) and internal (Clemence Massif, Radok Lake, Luff Nunatak, Stinear, Rymill and Bloomfield Mountains and others) oases (Princess Elizabeth Land and Mac Robertson Land, Antarctica) was investigated. 72 lichen species (incl. 48 species known for the Larsemann Hills) belonging to 34 genera and 14 families were recorded. Investigated
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Himalayan glacier thickness mapper (HIGTHIM) tool: An automated approach to map potential glacier lakes and expansion of existing lakes Polar Sci. (IF 1.8) Pub Date : 2023-10-19 Pradeep Srinivasalu, Anil V. Kulkarni, S.N. Remya, Tejal Shirsat, Ajanta Goswami
Climate warming is the driving force behind the mass change of glaciers, resulting in their thinning and retreat. These changes could result in the formation of glacial lakes across the Himalayan landscape, posing a risk of glacial lake outburst flood (GLOF) hazards, causing enormous damage to the natural environment, human property, and lives. The present study demonstrates a semi-automated tool named
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Soundscape in summer in Kongsfjorden, Svalbard, arctic Polar Sci. (IF 1.8) Pub Date : 2023-10-09 Sunil Kumar Mohanta, M.C. Sanjana, G. Latha, E. Arunbabu
This paper summarises research on ambient noise data collected during the summers of 2016 and 2017 by an autonomous Ambient Noise Measurement System (ANMS) deployed in the Kongsfjorden, Arctic. The primary goals of this study are to identify the various soundscape components and the variation of the soundscape in the Arctic environment during the summers of 2016 and 2017. This work mainly quantifies
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The current state of Lake Dålk (Larsemann Hills, East Antarctica) Polar Sci. (IF 1.8) Pub Date : 2023-10-10 Anastasiia Sukhanova, Dmitry Bantsev, Sergey Popov, Alina Boronina, Egor Shimanchuk, Sergey Polyakov
The study focuses on the current state of englacial Lake Dålk (Larsemann Hills Oasis), which was completely devastated in January 2017 by a catastrophic outburst and formed again in February 2020. A set of works including ground-penetrating radar (GPR) profiling, geodetic survey, core drilling, thermometric measurements and isotopic analysis was performed. As a result, new data were obtained about
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Evidence of Paleoproterozoic metamorphism in Vestfold Hills, East Antarctica: Insights from phase equilibria modelling and monazite CHIME dating Polar Sci. (IF 1.8) Pub Date : 2023-10-05 Aditya Naik, Devsamridhi Arora, Mayuri Pandey, Naresh Chandra Pant, Rashmi Gupta
The Vestfold Hills sector on the coastal fringe of the Princess Elizabeth Land forms part of an Archean to Paleoproterozoic aged cratonic nucleus of the East Antarctic Shield. A charnockite-granite association from the Mossel Gneiss Group in the northern region of the Vestfold Hills is investigated in this work to characterise the metamorphic-magmatic evolution of the area. Conventional thermometry
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International collaboration- An indispensable tool for Antarctic research: Status report of India's endeavours on the icy continent Polar Sci. (IF 1.8) Pub Date : 2023-09-28 Swati Nagar, Yogesh Ray, Rakesh Rao, Avinash Kumar, Rahul Mohan
Antarctica, the southernmost continent on Earth, is a harsh and remote place with an extreme climate. Despite its challenges, the continent has become a significant site for scientific research, particularly in the fields of earth sciences, glaciology, environmental science, atmospheric sciences, meteorology, palaeoclimatology, and biology. As a signatory to the Antarctic Treaty, India has actively
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Indigenous place names in arctic Canada: A publicly accessible inventory of projects Polar Sci. (IF 1.8) Pub Date : 2023-09-23 M. Cecilia Porter, Alyssa Parker, Matthew Walls
Toponyms contain Indigenous modes of understanding and reflect ecological histories and deep relationships between Indigenous communities, arctic environments, time, and land. Completed toponymic studies are useful for researchers to access; however, they are notoriously difficult to find. Many are completed by community groups and published on their websites or completed by government agencies and
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Seasonal and solar activity dependence of TEC over Bharati station, Antarctica Polar Sci. (IF 1.8) Pub Date : 2023-09-15 Gopi K. Seemala, Ipsita Katual, Chandan Kapil, Geeta Vichare
The total electron content (TEC) is a key parameter that is used to understand the effects of ionosphere on satellite-based navigation and communication signals. The ionosphere at polar is highly dynamic and acts as a major sink for the solar-terrestrial energy transfer processes, different magnetospheric and space weather events. Especially in Antarctica, the observation is still sparse due to a limited
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Biophysical effects of an old tundra fire in the Brooks Range Foothills of Northern Alaska, U.S.A Polar Sci. (IF 1.8) Pub Date : 2023-09-11 Eric A. Miller, Carson A. Baughman, Benjamin M. Jones, Randi R. Jandt
Our understanding of tundra fire effects in Northern Alaska is limited because fires have been relatively rare. We sampled a 70+ year-old burn visible in a 1948 aerial photograph for vegetation composition and structure, soil attributes, terrain rugosity, and thermokarst pit density. Between 1948 and 2017 the burn initially became wetter as ice wedges melted but then drained and dried as the troughs
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Metamorphic evolution of granulites from Grovnes Peninsula of Larsemann Hills, East Antarctica: Constraints from phase equilibrium modelling and geochronology Polar Sci. (IF 1.8) Pub Date : 2023-09-04 Nilanjana Sorcar, J. Amal Dev, Sneha Mukherjee, Kumar Batuk Joshi, B. Padma Rao
Petrology, geothermobarometry, and phase equilibrium modelling of garnetiferous felsic gneiss from Grovnes peninsula in the Larsemann Hills of Prydz Bay, East Antarctica provide pristine evidence for the preservation of high-grade metamorphic imprint in the area. The metamorphic evolution of the sample is demonstrated by the development of the assemblage Grt+Bt+Melt+Pl+Sill+Kfs+Qtz+Ilm at peak metamorphic
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High-resolution insights of physical properties of water columns of lakes at the Larsemann Hills, East Antarctica Polar Sci. (IF 1.8) Pub Date : 2023-09-03 Cheryl A. Noronha-D’Mello, B.S. Mahesh, Jenson George, Shramik Patil, Avirajsinh Jadav, Rahul Mohan
During the Austral summer of 2022, a study was conducted to investigate the physical properties of six lakes in the Larsemann Hills, East Antarctica. The lake water column's key properties, viz. temperature, salinity, density, fluorescence, and depth, were examined using a CTD profiler to establish a high-resolution description of their variations and identify the factors influencing intra and inter-lake
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Surface mass balance calculation with ground observation in the sub-basin of Larsemann Hills, East Antarctica Polar Sci. (IF 1.8) Pub Date : 2023-09-01 Surendra Jat, Mohammad Sadiq, Pradeep Kumar, Abhishek Verma, Deepak Y Gajbhiye
The study includes ground-based data of surface mass balance calculations to assess the input of climate change on the ice sheet health. The study covers an approximately 471 km2 area of the ice sheet that lies in between the Dålk and Polarårboken glaciers, Larsemann Hills, Prince Elizabeth, East Antarctica. Snow accumulation/ablation data is collected from 13 stake networks and 06 single stakes installed
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Imaging of crustal structure beneath the Larsemann Hills, Antarctica using scattered wave technique – First Results Polar Sci. (IF 1.8) Pub Date : 2023-08-29 B.P. Rao
The crustal structure in terms of crustal thickness, shear wave velocities and Poisson's ratio plays a crucial role in understanding and/or deciphering the tectonic setting and its evolution. The receiver function analysis, H–K stacking and inversion techniques are the widely used tools to determine these parameters. In the present study, the data obtained from the first-ever established broadband
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Climatology of quiet time geomagnetic field variations at two locations in Antarctica Polar Sci. (IF 1.8) Pub Date : 2023-08-28 Geeta Vichare, Atul Kulkarni, Rahul Rawat, Gopi K. Seemala, Anoop K. Soman, Pritimay Patro
During geomagnetic quiet conditions, Indian Antarctic stations are considered to be located outside the auroral oval: Maitri (CGM coordinates: 63.3°S, 54.2°E) is equatorward and Bharati (CGM coordinates: 74.8°S, 98.4°E) is poleward of the auroral oval. Simultaneous observations of magnetic field variations at these two locations for 10-years (2013–2022) provide an opportunity to study quiet-time magnetic
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Reconstruct the AMSR-E/2 thin ice thickness algorithm to create a long-term time series of sea-ice production in Antarctic coastal polynyas Polar Sci. (IF 1.8) Pub Date : 2023-08-25 Sohey Nihashi, Kay I. Ohshima, Takeshi Tamura
This study presented an extended time series of ice production in Antarctic coastal polynyas for 20 years of 2002–21 using high spatial resolution satellite data from passive microwave sensors: the Advanced Microwave Scanning Radiometer for EOS (AMSR-E) and the Advanced Microwave Scanning Radiometer 2 (AMSR2). For this, we reconstructed the previously presented thin ice thickness algorithms and re-estimated
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Year-long ground-based observations of bromine oxide over Bharati Station, Antarctica Polar Sci. (IF 1.8) Pub Date : 2023-08-21 Shrutika P. Wagh, Sankirna D. Joge, Surendra Singh, Prithviraj Mali, Steffen Beirle, Thomas Wagner, Silvia Bucci, Alfonso Saiz-Lopez, Rohini Bhawar, Anoop S. Mahajan
Bromine chemistry plays an important role in tropospheric ozone depletion events in polar regions. Autocatalytic reactions lead to bromine explosion events, causing ozone depletion to near-zero levels in the polar troposphere. Bromine chemistry over Antarctica is not fully understood, and ground-based observations are scarce. This work presents year-long observations of bromine oxide (BrO) over the
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Mapping lichen abundance in ice-free areas of Larsemann Hills, East Antarctica using remote sensing and lichen spectra Polar Sci. (IF 1.8) Pub Date : 2023-08-12 Chandra Prakash Singh, Harsh Joshi, Dhruvkumar Kakadiya, Malay S. Bhatt, Rajesh Bajpai, Ramya Ranjan Paul, D.K. Upreti, Shailendra Saini, Mirza Javed Beg, Anant Pande, Naveen Tripathi, Kiledar Singh Tomar, Sandip R. Oza, Mehul R. Pandya, Bimal K. Bhattacharya
Lichen communities are known to be most resistant and adapted organisms to the extreme environments; however, their abundance is not well mapped. Extensive lichen surveys were conducted as part of the 39th Indian scientific expedition and in-situ spectra (350 nm–2500 nm) of lichens were collected in the Larsemann Hills, East Antarctica during austral summer of 2020. Lichen abundance mapping was carried
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First direct measurement and characterisation of plasma waves, originating from outer space, in the polar upper atmosphere, achieved in the Larsemann-Vestfold region by winter traverses onto the icecap Polar Sci. (IF 1.8) Pub Date : 2023-08-09 D. Neudegg, M. Underwood
The geomagnetic field focuses onto the polar regions near the auroral oval, which the Larsemann Hills are in proximity to. Solar disturbances cause instabilities in the geomagnetic field and the associated electrically-charged particle (plasma) population, which translate into waves that propagate along geomagnetic field lines towards the Earths polar regions. As the waves enter the electrically charged
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Characterizing Antarctic air-breathing predator dive patterns on a common prey base from stationary echosounders Polar Sci. (IF 1.8) Pub Date : 2023-08-06 Pavanee Annasawmy, John K. Horne, Christian S. Reiss, Gavin J. Macaulay
Diving patterns of air-breathing predators were monitored from three moored subsurface upward-looking echosounders. Complete and partial dive profiles were visible on active acoustic records as echoes that started and/or returned to the surface. Dive metrics: maximum dive depths, durations, and wiggle count were measured and angles, distances, and velocities, were calculated at each mooring. Dive shapes
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Diversity and composition of fungal communities across diverse environmental niches in Antarctica Polar Sci. (IF 1.8) Pub Date : 2023-08-05 Namrata Jiya, Prafulla Shede, Avinash Sharma
Antarctica harbours a wide range of extreme and diverse ecological niches that support diverse group of microorganisms, making it important to investigate the microbial diversity of this pristine environment. The current study focuses on the diversity and distribution of fungi in diverse environmental niches like exposed soil, accumulated snow, deep sea, and lake sediments in the Larsemann Hills, Antarctica
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New insights on the phylogeny and genetic status of a highly vagile seabird from East Antarctica Polar Sci. (IF 1.8) Pub Date : 2023-08-03 Ankit Shankar Pacha, Anant Pande, Shashank Arya, Shailendra Saini, Kuppusamy Sivakumar, Samrat Mondol
Wilson's storm-petrel (Oceanites oceanicus, family Oceanitidae, order Procellariiformes) breeds in rock cavities along the ice-free coastline of Antarctica, a habitat susceptible to environmental change and human disturbance. Despite extensive presence, high numbers and wide-ranging movement, there are taxonomic ambiguities surrounding species' phylogenetic positioning and data gaps for most parts
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Surface roughness from in-situ measurements around Indian Antarctic stations Polar Sci. (IF 1.8) Pub Date : 2023-07-27 Megha Maheshwari, Kamaljit Singh Rajkumar, Jayaprasad Pallipad, Dhani Ram Rajak, Sandip Rashmikant Oza, Raj Kumar
Surface roughness is an important parameter in deriving energy balance over the polar ice-sheets and glaciers. In Antarctica, roughness appears as snow patches and is affected by wind transport. It is also influenced by snowfall, snowdrifts, snowmelt, and snow grain size. In this paper, we derive surface roughness using a laser distometer. The roughness measurements were collected during the 32nd Indian
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A broadband seismological observatory at Larsemann Hills, Antarctica: Noise characteristics and data quality Polar Sci. (IF 1.8) Pub Date : 2023-07-16 Padma Rao B, Krishna Jha, Suresh Kumar Thatikonda
Antarctica, the southernmost ice-covered continent, plays a pivotal role in unraveling Earth's intricate evolutionary processes. Several studies have been conducted to comprehend the crustal structure of West Antarctica. However, our understanding of the sub-surface structure in the East Antarctica region, particularly along Princess Elizabeth Land (PEL), remains limited due to the scarcity of geophysical
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Larsemann Hills: Geomorphometric modeling and mapping Polar Sci. (IF 1.8) Pub Date : 2023-07-11 I.V. Florinsky
Geomorphometric modeling is widely used in geosciences. However, geomorphometric modeling and mapping of Antarctic oases has not been performed so far. This article presents the first results of our work on geomorphometric modeling and mapping of the Larsemann Hills obtained in the frameworks of the 68th Russian Antarctic Expedition in January–April 2023. As input data, we used a fragment of the Reference
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Study on movement characteristics of snow-wind flow based on SPH method Polar Sci. (IF 1.8) Pub Date : 2023-06-30 Shuzhi Zhang, Afang Jin, Yong Dai
Snowstorm disasters seriously endanger human life and the social economy. In order to find out the influence of the sublimation of snow on motion characteristic of snow-wind flow, based on Smoothed Particle Hydrodynamics (SPH), this paper simulates motion to propose the method and basic theory of the SPH model of snow-wind flow. The basic idea of the SPH method is to decompose the computational domain
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Mineral magnetic properties of surface soils from the Broknes and Grovnes Peninsula, Larsemann Hills, East Antarctica Polar Sci. (IF 1.8) Pub Date : 2023-06-25 G.S. Joju, Anish Kumar Warrier, Marcos A.E. Chaparro, B.S. Mahesh, Freddy Abraham Matthew, S. Anusree, Rahul Mohan
This study presents the mineral magnetic, particle size, and organic content data of surface soils from Larsemann Hills, East Antarctica. The analysis of isothermal remanent magnetization and the high specific magnetic susceptibility values –mean (±S.D.) values of 117.7 (±175.0) × 10−8m3kg−1 for Broknes Peninsula and of 330.9 (±217.4) × 10−8m3kg−1 for Grovnes Peninsula– indicate high concentrations
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Estimating spatio-temporal changes in front edge of the Ronne Ice Shelf in context of climate change using remote sensing based integrated approach Polar Sci. (IF 1.8) Pub Date : 2023-06-20 Bishakha Kundu, Avinash Kumar, Aakriti Srivastava, Debrupa Chatterjee, Fumming Xie, Dharmaveer Singh
Climate variability is thought to have an impact on the Ronne Ice Shelf (RIS), one of the largest ice shelf in Antarctica, located at the mouth of the Weddell Sea. However, investigations evaluating the impact of climate variability on the geometry (front edge) of this ice body have not yet been done. This study examines a spatial-temporal shift in the front edge of the Ronne Ice Shelf during the years
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Investigating noble gases and nitrogen in Zag (H3-6) and ALH 77216 (L3.7–3.9): The ordinary chondrites with solar type neon and argon Polar Sci. (IF 1.8) Pub Date : 2023-06-13 Ramakant R. Mahajan
Concentrations and isotopic compositions of noble gases (He, Ne, Ar, Kr, and Xe) and nitrogen in two ordinary chondrites (OCs), Zag (H3-6) and ALH 77216 (L3.7–3.9), are presented. The aim of the study is to examine the cosmic ray exposure history, radiogenic ages and isotopic signatures of trapped gases in them. The results of stepwise heating analyses indicate that light noble gases (He and Ne) are