Article
Environmental Sciences
Maria Osinska, Robert Jozef Bialik, Kornelia Anna Wojcik-Dlugoborska
Summary: The study investigated the impacts of glacial meltwater on marine environments near diverse glaciers of King George Island, Antarctica. Findings showed changes in water quality parameters due to glacier meltwater influence, including decreased salinity, temperature, and dissolved organic matter contents, as well as increased pH, turbidity, and dissolved oxygen values. Glacial meltwater was shown to have the most correlation with dissolved organic matter content and the least correlation with water temperature in the studied coves.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geosciences, Multidisciplinary
A. P. Lepp, L. M. Simkins, J. B. Anderson, R. W. Clark, J. S. Wellner, C-d. Hillenbrand, J. A. Smith, A. A. Lehrmann, R. Totten, R. D. Larter, K. A. Hogan, F. O. Nitsche, A. G. C. Graham, L. Wacker
Summary: This study investigates subglacial hydrology and meltwater drainage activity beneath Thwaites Glacier in West Antarctica. The results show evidence of a long-lived subglacial hydrologic system and suggest that meltwater plumes are the primary mechanism of sedimentation seaward of the glacier. The findings highlight the importance of accounting for subglacial hydrology in projecting the future behavior of Thwaites Glacier and other marine-based glaciers around Antarctica.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Multidisciplinary Sciences
M. Guglielmin, M. Azzaro, P. Buzzini, D. Battistel, M. Roman, S. Ponti, B. Turchetti, C. Sannino, L. Borruso, M. Papale, A. Lo Giudice
Summary: A unique terrestrial ecosystem containing hypersaline brine was discovered in Northern Victoria Land, Antarctica. The geochemistry and microbial diversity revealed its difference from other Antarctic brines, indicating a probable ancient origin caused by progressive cryoconcentration of seawater.
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
Baojin Qiao, Jianting Ju, Liping Zhu, Hao Chen, Jinlei Kai, Qiangqiang Kou
Summary: Lake water storage is crucial for lake research, and traditional methods using bathymetric data for underwater topography estimation may lead to inaccuracies in large lakes like those found on the Tibetan Plateau. This study successfully utilized remote sensing data and in situ measurements to improve the accuracy of water storage estimation and change analysis in two lakes, highlighting the importance of considering multiple factors in lake expansion.
Article
Environmental Sciences
Baojin Qiao, Bingkang Nie, Changmao Liang, Longwei Xiang, Liping Zhu
Summary: The study revealed significant spatial differences between terrestrial water storage and lake water storage change in the inner Tibetan Plateau, with lake water storage changes mainly concentrated in the northeastern and southeastern parts, while increased terrestrial water storage primarily occurred in the northeastern region.
Article
Geosciences, Multidisciplinary
Peter M. F. Sheehan, Karen J. Heywood, Andrew F. Thompson, M. Mar Flexas, Michael P. Schodlok
Summary: The content and pathways of meltwater determine the impact of melting ice shelves in Antarctica on ocean circulation and climate. Through observations and simulations, we found that meltwater from different ice shelves has different densities and turbidities, leading to separate export pathways. The observations revealed a cyclonic in-trough gyre that retains meltwater, which has the potential to affect circulation and future melting.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Alessandro Silvano, Paul R. Holland, Kaitlin A. Naughten, Oana Dragomir, Pierre Dutrieux, Adrian Jenkins, Yidongfang Si, Andrew L. Stewart, Beatriz Pena Molino, Gregor W. Janzing, Tiago S. Dotto, Alberto C. Naveira Garabato
Summary: Warm ocean waters drive rapid ice-shelf melting in the Amundsen Sea. The variability of the undercurrent, which transports warm waters onto the continental shelf, is found to be depth-dependent on decadal time scales. Decadal ocean surface cooling in the tropical Pacific leads to wind anomalies that drive a perturbation of the surface flow and undercurrent, resulting in increased ice-shelf melting.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Review
Microbiology
Gilda Varliero, Pedro H. Lebre, Beat Frey, Andrew G. Fountain, Alexandre M. Anesio, Don A. Cowan
Summary: Microbial communities and nutrient dynamics in glaciers and ice sheets are constantly changing due to hydrological conditions. Glaciers and ice sheets act as bioreactors, as microbiomes transform nutrients and impact meltwater chemistry. Global warming affects nutrient and cell export, altering proglacial systems. This review integrates current understanding of glacial hydrology, microbial activity, and nutrient and carbon dynamics, highlighting their interdependence, variability, and impact on proglacial environments.
Article
Geosciences, Multidisciplinary
Ji Sung Na, Peter E. D. Davis, Byeong-Hoon Kim, Emilia Kyung Jin, Won Sang Lee
Summary: Understanding the structure of ice shelf water (ISW) is crucial for studying basal ice melting. Large-eddy simulation experiments were conducted in this study to assess ISW structure and basal melt patterns under different current velocity scenarios. The results revealed that ISW thickness is primarily determined by meridional velocity, while zonal velocity influences potential temperature and salinity. The northward movement of meltwater determines the basal melt rate and induces thermohaline interleaving. The findings contribute to the formulation of a parameterization for basal melting.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
Sonia A. Nagorski, Andrew W. Vermilyea, Carl H. Lamborg
Summary: The study found that Hg in glacierized streams is primarily in the particulate form, while in non-glacierized streams it is primarily in the filtered fraction, with concentrations 20 times higher and a higher percentage in its methylated form. During the summer melt season, the total Hg yield from glacierized streams was approximately 80 times higher than in non-glacierized streams. Glacial and watershed geochemical conditions likely contribute to differences in Hg speciation between the two types of streams.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Multidisciplinary Sciences
Sarah Feron, Raul R. Cordero, Alessandro Damiani, Avni Malhotra, Gunther Seckmeyer, Pedro Llanillo
Summary: Projections indicate that summertime warming events in Antarctica will become more frequent, longer-lasting, and significantly increase in number by the end of the century. This anticipated rise in warming events may lead to enhanced surface melt in coastal areas, posing a risk to the future stability of Antarctic ice shelves.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
M. Mar Flexas, Andrew F. Thompson, Michael P. Schodlok, Hong Zhang, Kevin Speer
Summary: The observed acceleration of ice shelf basal melt rates throughout West Antarctica could destabilize continental ice sheets and markedly increase global sea level. Explanations for decadal-scale melt intensification have focused on processes local to shelf seas surrounding the ice shelves. A suite of process-based model experiments, guided by CMIP6 forcing scenarios, show that freshwater forcing from the Antarctic Peninsula, propagated between marginal seas by a coastal boundary current, causes enhanced melting throughout West Antarctica.
Article
Chemistry, Multidisciplinary
Mi Hae Jeon, Jinyoung Jung, Mi Ok Park, Shigeru Aoki, Tae-Wan Kim, Seung-Kyu Kim
Summary: The Amundsen Sea is experiencing rapid melting of the West Antarctic Ice Sheet due to increased heat transport by Circumpolar Deep Water (CDW). Studying the humic-like component of fluorescent dissolved organic matter (FDOM) as a tracer for CDW and glacial meltwater in the Amundsen Sea shows potential for identifying these water masses and their impacts on biogeochemical cycles.
Article
Geosciences, Multidisciplinary
Kristina Krklec, David Dominguez-Villar, Drazen Perica
Summary: Rock tablet method is widely used in quantifying rock weathering by cutting rock samples and exposing them in natural environment to calculate weathering rate. Despite its simplicity, differences in experimental design, sample preparation, and calculations among researchers make the results challenging to evaluate and compare.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geosciences, Multidisciplinary
Russell S. Harmon, Deborah L. Leslie, W. Berry Lyons, Kathleen A. Welch, Diane M. McKnight
Summary: The McMurdo Dry Valley region in Antarctica is characterized by the flow of ephemeral streams during the summer season, transporting meltwater to ice-covered lakes. Analyzing the chemistry of streams in Taylor Valley over a 20-year period revealed dominant solute budgets and consistent anionic geochemical fingerprints, with variations in cation compositions. Two representative streams, Andersen Creek and Von Guerard, demonstrated varying physical and biological characteristics, with strong daily cycles in solute load, temperature, dissolved oxygen, and pH. Von Guerard exhibited chemostatic regulation over the summer flow season, indicating prolonged water-sediment interaction and silicate mineral dissolution.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2021)
Article
Geosciences, Multidisciplinary
Thomas Schuler, Jack Kohler, Nelly Elagina, Jon Ove M. Hagen, Andrew J. Hodson, Jacek A. Jania, Andreas M. Kaab, Bartlomiej Luks, Jakub Malecki, Geir Moholdt, Veijo A. Pohjola, Ireneusz Sobota, Ward J. J. Van Pelt
FRONTIERS IN EARTH SCIENCE
(2020)
Article
Microbiology
Maria-Luisa Avila-Jimenez, Gavin Burns, Zhili He, Jizhong Zhou, Andrew Hodson, Jose-Luis Avila-Jimenez, David Pearce
Article
Geosciences, Multidisciplinary
Eleanor L. Jones, Andrew J. Hodson, Steven F. Thornton, Kelly R. Redeker, Jade Rogers, Peter M. Wynn, Timothy J. Dixon, Simon H. Bottrell, H. Brendan O'Neill
FRONTIERS IN EARTH SCIENCE
(2020)
Article
Geosciences, Multidisciplinary
Mikkel Toft Hornum, Peter Betlem, Andy Hodson
Summary: This study found that the geological structures around certain pingos on Svalbard contribute to the flow of sub-permafrost groundwater towards the pingo springs. Electrical resistivity imaging revealed differences between geological units, suggesting that uplifted Arctic valley flanks may serve as significant locations for groundwater and greenhouse gas discharge.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
A. J. Hodson, M. Sabacka, A. Dayal, A. Edwards, J. Cook, P. Convey, K. Redeker, D. A. Pearce
Summary: The study describes the seasonal changes in biogeochemistry, microbial community, and ecosystem production in glacial snowpacks in the maritime Antarctic during a cold summer. The research found that autotrophic cells were low, while bacterial populations were high, with the basal ice layer being the most productive habitat. Additionally, the increasing acidity of the snow cover was attributed to emissions from wet guano in the penguin colony.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Geography, Physical
Tristram D. L. Irvine-Fynn, Tom O. Holt, Timothy D. James, Mark W. Smith, Nick Rutter, Philip R. Porter, Andrew J. Hodson
Summary: In a warming Arctic, the increase in seasonal bare-ice extent due to rising glacier snowlines enhances the importance of turbulent energy fluxes for surface ablation and glacier mass balance. This study uses time-lapse photogrammetry to analyze the fine-scale supraglacial topography on a glacier in Svalbard. The results show that surface roughness is affected by supraglacial hydrology and temporal changes in albedo feedbacks, and the roughness parameter decreases and then increases following the exposure of bare-ice. The study also identifies the influence of hydrological drivers on plot-scale topography. This research provides an analytical framework for future studies on ice surface roughness and hydro-meteorological variables and aims to improve parameterizations of evolving bare-ice areas.
EARTH SURFACE PROCESSES AND LANDFORMS
(2022)
Article
Energy & Fuels
Peter Betlem, Srikumar Roy, Thomas Birchall, Andrew Hodson, Riko Noormets, Miriam Roemer, Ragnheid Skogseth, Kim Senger
Summary: This study models the NGH stability zone in Svalbard's fjords and predicts NGH formation potential in most fjords at mean BWT conditions. Active petroleum systems with fluid migration reaching the seafloor are observed in Isfjorden, but the predicted GHSZ across Svalbard's fjords is likely to disappear in the next few decades due to water column warming.
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2021)
Article
Environmental Sciences
Ivaylo Kolchev, Ian P. G. Marshall, Eleanor Jones, Jacob C. Yde, Per Nornberg, Alejandro M. Rivera, Andy J. Hodson, Ebbe N. Bak, Kai Finster
Summary: Arctic permafrost soils store significant reserves of organic matter, and the increase in temperature and organic matter can stimulate the production of methane and carbon dioxide. However, younger sediments with limited organic carbon resources may have uncertain capacity for greenhouse gas emissions.
ARCTIC ANTARCTIC AND ALPINE RESEARCH
(2022)
Article
Engineering, Civil
Andrew Hodson, Gabrielle Kleber, Jack Johnson, Michael Lonardi, Chiara Petroselli, Tim Dixon, Simon Bottrell
Summary: This study investigates the hydrology and biogeochemistry of perennial groundwater springs in the forefields of retreating Svalbard glaciers. The results show that these springs are common in the area, even in cold-based glaciers with permafrost. The springs contain geogenic methane and exhibit different redox environments linked to various reactions. The study also reveals that climate-driven glacial retreat influences the quantity and quality of groundwater entering downstream drainage systems.
JOURNAL OF HYDROLOGY
(2023)
Article
Geosciences, Multidisciplinary
Gabrielle E. Kleber, Andrew J. Hodson, Leonard Magerl, Erik Schytt Mannerfelt, Harold J. Bradbury, Yizhu Zhu, Mark Trimmer, Alexandra V. Turchyn
Summary: Measurements of methane concentrations in recently formed springs in central Svalbard indicate that groundwater springs formed during the retreat of melting glaciers are likely hotspots of methane emissions in the high Arctic. Climate-driven glacial retreat facilitates widespread release of methane, creating a positive feedback loop that is probably prevalent across other regions of the rapidly warming Arctic.
Article
Geography, Physical
Mikkel Toft Hornum, Andrew Jonathan Hodson, Soren Jessen, Victor Bense, Kim Senger
Article
Geography, Physical
Andrew J. Hodson, Aga Nowak, Mikkel T. Hornum, Kim Senger, Kelly Redeker, Hanne H. Christiansen, Soren Jessen, Peter Betlem, Steve F. Thornton, Alexandra Turchyn, Snorre Olaussen, Alina Marca
Article
Geography, Physical
Andreas Alexander, Maarja Kruusmaa, Jeffrey A. Tuhtan, Andrew J. Hodson, Thomas Schuler, Andreas Kaab
Article
Geography, Physical
Joseph M. Cook, Andrew J. Tedstone, Christopher Williamson, Jenine McCutcheon, Andrew J. Hodson, Archana Dayal, McKenzie Skiles, Stefan Hofer, Robert Bryant, Owen McAree, Andrew McGonigle, Jonathan Ryan, Alexandre M. Anesio, Tristram D. L. Irvine-Fynn, Alun Hubbard, Edward Hanna, Mark Flanner, Sathish Mayanna, Liane G. Benning, Dirk van As, Marian Yallop, James B. McQuaid, Thomas Gribbin, Martyn Tranter
Article
Geosciences, Multidisciplinary
Andrew Jonathan Hodson, Aga Nowak, Kelly Robert Redeker, Erik S. Holmlund, Hanne Hvidtfeldt Christiansen, Alexandra Turchyn
FRONTIERS IN EARTH SCIENCE
(2019)