Article
Geography, Physical
Xiaolong Chen, Hongbin Zhang, Michael L. Griffiths, Xiaogui Peng, Liangzhe Yang, Ming Yu, Junhua Huang, Shuyu Xue, Hai Cheng, Shuai Chen
Summary: This study examines the weakening of the East Asian summer monsoon during the Younger Dryas period, attributing it to freshwater discharge into the North Atlantic and subsequent cooling of the Northern Hemisphere. It also highlights the influence of sea ice variability in the Nordic Sea on the high-latitude climate during this period, but the impact on the East Asian summer monsoon remains uncertain.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Md. Arif Hussain, Mohd. Farooq Azam, Smriti Srivastava, Parul Vinze
Summary: This study reconstructs the glacier-wide mass balances of the Gangotri Glacier System and its individual glaciers using a temperature-index model. The results show negative mass balances for Gangotri and Meru glaciers, while positive mass balances for Chaturangi and Raktavaran glaciers. The positive mass balances on the fragmented tributary glaciers are attributed to non-climatic topographic reasons, and should not be confused with climate change denial or the Karakoram Anomaly.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
D. R. Rounce, R. Hock, R. W. McNabb, R. Millan, C. Sommer, M. H. Braun, P. Malz, F. Maussion, J. Mouginot, T. C. Seehaus, D. E. Shean
Summary: Supraglacial debris affects glacier mass balance by either enhancing or reducing surface melting. Accounting for debris can reduce sub-debris melt by up to 37%, impacting regional mass balance by 0.40 m water equivalent per year. Recent observations suggest differences in ice dynamics are the primary reason for thinning rates over debris-covered and clean ice glaciers.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geography, Physical
Argha Banerjee, Ujjwal Singh, Chintan Sheth
Summary: The researchers propose a new method that combines multiple remote-sensing proxies to obtain robust estimates of annual glacier mass balance. This method can be used to study interannual variability in mass balance on glaciers where field data are not available.
JOURNAL OF GLACIOLOGY
(2023)
Article
Geography, Physical
Thupstan Angchuk, Alagappan Ramanathan, I. M. Bahuguna, Arindan Mandal, Mohd Soheb, Virendra Bahadur Singh, Somdutta Mishra, Sarvagya Vatsal
Summary: Improving knowledge of Himalayan glaciers mass balance is crucial for understanding current and past atmospheric variations, as well as future water availability. The study of Patsio Glacier in the western Himalayas revealed a cumulative mass balance over seven years with consistent winter mass balance values, showing a positive correlation with annual and winter precipitation in the region. Monitoring seasonal mass balance and considering non-climatic parameters like debris and aspect are important for accurate estimation of glacier-wide mass balance.
JOURNAL OF GLACIOLOGY
(2021)
Article
Geography, Physical
Tika Ram Gurung, Rijan Bhakta Kayastha, Koji Fujita, Sharad Prasad Joshi, Anna Sinisalo, James D. D. Kirkham
Summary: Despite the importance of in situ glacier mass balance for regional water resource planning and climate change indicators, records in the Himalaya are limited. This study presents updated measurements of the mass balance of Rikha Samba Glacier in Nepal between 2011 and 2021. The study also uses a model to extend the mass balance series back to 1974. The findings show that the modeled mass balance is consistent with in situ measurements and previous estimates, indicating significant mass losses in line with other Himalayan glaciers.
JOURNAL OF GLACIOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Julian Martin, Bethan J. Davies, Richard Jones, Varyl Thorndycraft
Summary: This study investigates the sensitivity of glacier mass balance, velocity, and ice thickness in Patagonia to climate change, using the Parallel Ice Sheet Model. The results provide insights into present-day glacier properties and dynamics, as well as the controls on ice cap deglaciation. Additionally, the study explores the palaeoclimatic envelope for glacial advances during the Last Glacial-Interglacial Transition and Holocene in Patagonia.
FRONTIERS IN EARTH SCIENCE
(2022)
Review
Geosciences, Multidisciplinary
Martin B. Sweatman
Summary: Jorgeson, Breslawski, and Fisher challenge comments made in Sweatman's review paper, raising concerns about the confidence in their modeling of radiocarbon data from the Younger Dryas boundary.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geosciences, Multidisciplinary
Brice Noel, Guofinna Aoalgeirsdottir, Finnur Palsson, Bert Wouters, Stef Lhermitte, Jan M. Haacker, Michiel R. van den Broeke
Summary: A study found that the slowdown in mass loss of Icelandic glaciers since 2011 is related to a cooling signal in a certain area of the North Atlantic. This cooling signal mitigates atmospheric warming in Iceland, resulting in reduced glacier meltwater runoff and slower mass loss. However, as the cooling signal weakens, high mass loss rates in Icelandic glaciers are expected to resume.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Dariusz Ignatiuk, Malgorzata Blaszczyk, Tomasz Budzik, Mariusz Grabiec, Jacek A. Jania, Marta Kondracka, Michal Laska, Lukasz Malarzewski, Lukasz Stachnik
Summary: The warming of the Arctic climate, known as Arctic amplification, is the focus of this study, which presents glaciological and meteorological data collected in southern Spitsbergen from 2009 to 2020. The data includes air temperature, humidity, wind speed, radiation, snow depth, snow density, and glacier mass balance measurements. The datasets serve as valuable resources for studying processes in the polar environment and can be used for hydrological and glaciological modeling and remote sensing product calibration.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Geography, Physical
Tansy Branscombe, Rick Schulting, Julia Lee-Thorp, Melanie J. Leng
Summary: This study presents a four-year subannual isotope marine temperature record using modern Spisula sachalinensis specimens, indicating the species' potential as an indicator of past marine and climatic conditions. Sequential isotopic analysis revealed seasonal variations in shell growth patterns influenced by sea surface temperature, with significant geographical variations in growth pattern posing challenges for palaeoclimatic interpretation. Stable isotope analysis of Spisula sachalinensis is considered a useful complement to sclerochronological research in understanding past SST conditions.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geography, Physical
S. A. G. Leroy, R. D. Ricketts, K. A. Rasmussen
Summary: This study of Lake Issyk-Kul in arid Central Asia examines sediment and pollen records over the past 12,750 years, revealing complex interactions between vegetation and climate change around the lake. Different periods show that vegetation and climate trends around the lake may be influenced by the Westerlies and monsoonal climates at different times.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geography, Physical
Yin Fu, Qiao Liu, Guoxiang Liu, Bo Zhang, Rui Zhang, Jialun Cai, Xiaowen Wang, Wei Xiang
Summary: The study found that in the southeastern Tibetan Plateau, the debris-covered Dagongba Glacier experiences a significant decrease in surface elevation and velocity during the warm season compared to the cold season, with particularly notable changes around supraglacial lakes and ice cliffs.
JOURNAL OF GLACIOLOGY
(2022)
Article
Environmental Sciences
Juan Ignacio Lopez-Moreno, Francisco Rojas-Heredia, Jorge Luis Ceballos, Enrique Moran-Tejeda, Esteban Alonso-Gonzalez, Ixeia Vidaller, Cesar Deschamps-Berger, Jesus Revuelto
Summary: This study extends knowledge of the evolution of glacier shrinkage in the Cocuy-Guican Mountains since the Little Ice Age. It reveals the hydrological significance of Colombian glaciers, indicating that precipitation plays a primary role in hydrological variability at high elevation sites. The slowing of glacier retreat can be attributed to the confinement of glaciers to higher elevations, ice accumulation in topographic locations providing shelter from solar radiation, and the absence of recent marked climatic anomalies.
LAND DEGRADATION & DEVELOPMENT
(2022)
Article
Meteorology & Atmospheric Sciences
Catriona L. Fyffe, Emily Potter, Stefan Fugger, Andrew Orr, Simone Fatichi, Edwin Loarte, Katy Medina, Robert A. Hellstroem, Maud Bernat, Caroline Aubry-Wake, Wolfgang Gurgiser, L. Baker Perry, Wilson Suarez, Duncan J. Quincey, Francesca Pellicciotti
Summary: The study conducted in Peruvian glaciers using an energy balance model found that net shortwave radiation plays a dominant role in energy balance, while sensible heat flux has a relatively minor contribution to melt energy. Snowfall has a significant impact on melt rates.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2021)
Article
Geography, Physical
Tom Bradwell, David Small, Derek Fabel, Chris D. Clark, Richard C. Chiverrell, Margot H. Saher, Dayton Dove, S. Louise Callard, Matthew J. Burke, Steven G. Moreton, Alicia Medialdea, Mark D. Bateman, David H. Roberts, Nicholas R. Golledge, Andrew Finlayson, Sally Morgan, Colm O. Cofaigh
Summary: The offshore sector around Shetland is one of the least studied areas of the former British-Irish Ice Sheet, with key scientific issues including the dominance of a locally sourced 'Shetland ice cap' versus an invasive Fennoscandian Ice Sheet, the flow configuration and style of glaciation, the nature of confluence between different ice sheets, the cause and rate of ice sheet separation, and the wider implications of ice sheet uncoupling on subsequent deglaciation. New data from geological, geomorphological, marine geophysical, and geochronological studies are presented to address these unresolved questions.
JOURNAL OF QUATERNARY SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
T. P. Lane, O. Paasche, B. Kvisvik, K. R. Adamson, A. Rodes, H. Patton, N. Gomez, D. Gheorghiu, J. Bakke, A. Hubbard
GEOPHYSICAL RESEARCH LETTERS
(2020)
Article
Geosciences, Multidisciplinary
Sasha Z. Leidman, Asa K. Rennermalm, Anthony J. Broccoli, Dirk van As, Michiel R. van den Broeke, Konrad Steffen, Alun Hubbard
FRONTIERS IN EARTH SCIENCE
(2020)
Article
Geography, Physical
Tom Bradwell, Derek Fabel, Chris D. Clark, Richard C. Chiverrell, David Small, Rachel K. Smedley, Margot H. Saher, Steven G. Moreton, Dayton Dove, S. Louise Callard, Geoff A. T. Duller, Alicia Medialdea, Mark D. Bateman, Matthew J. Burke, Neil McDonald, Sean Gilgannon, Sally Morgan, David H. Roberts, Colm O. Cofaigh
Summary: This study reconstructs the highly dynamic ice-sheet in the last British-Irish Ice Sheet (BIIS) NW sector over the past 45,000 years using various data methods, revealing periods of expansive ice-sheet glaciation dominated by ice-streaming interspersed with periods of much more restricted ice-cap or tidewater/fjordic glaciation.
JOURNAL OF QUATERNARY SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Hannah Bailey, Alun Hubbard, Eric S. Klein, Kaisa-Riikka Mustonen, Pete D. Akers, Hannu Marttila, Jeffrey M. Welker
Summary: The loss of Arctic sea-ice leads to increased evaporation, which in turn fuels extreme winter snowfall in Europe. Observation data from 2020 shows a significant correlation between evaporation from the Barents Sea and Europe's maximum snowfall.
Article
Geochemistry & Geophysics
David M. Chandler, Jemma L. Wadham, Peter W. Nienow, Samuel H. Doyle, Andrew J. Tedstone, Jon Telling, Jonathan Hawkings, Jonathan D. Alcock, Benjamin Linhoff, Alun Hubbard
Summary: Intensive study of the Greenland Ice Sheet's subglacial drainage has shown efficient drainage development under thick ice, with this research providing valuable data to validate and improve current numerical drainage system models. The study revealed a fast/efficient subglacial drainage system extending under ice over 900m thick, which remained stable even under variable melt inputs. This research emphasizes the importance of understanding subglacial drainage dynamics in the context of ice dynamics and hydrology.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Multidisciplinary Sciences
T. D. L. Irvine-Fynn, A. Edwards, I. T. Stevens, A. C. Mitchell, P. Bunting, J. E. Box, K. A. Cameron, J. M. Cook, K. Naegeli, S. M. E. Rassner, J. C. Ryan, M. Stibal, C. J. Williamson, A. Hubbard
Summary: This study quantifies microbial abundance and cellular biomass flux in the western sector of the Greenland Ice Sheet, revealing slow interstitial water flow but high cell transport to supraglacial streams per square meter. The research suggests that cellular carbon accumulation in the weathering crust exceeds fluvial export, providing significant flux to support heterotrophs and methanogenesis at the bed.
NATURE COMMUNICATIONS
(2021)
Article
Environmental Sciences
Tristram D. L. Irvine-Fynn, Pete Bunting, Joseph M. Cook, Alun Hubbard, Nicholas E. Barrand, Edward Hanna, Andy J. Hardy, Andrew J. Hodson, Tom O. Holt, Matthias Huss, James B. McQuaid, Johan Nilsson, Kathrin Naegeli, Osian Roberts, Jonathan C. Ryan, Andrew J. Tedstone, Martyn Tranter, Christopher J. Williamson
Summary: The study reveals similarities in seasonal patterns of bare-ice reflectance across different datasets, but also unique short-term dynamics in reflectance distribution. It suggests that areal mean reflectance plays a key role in controlling local ablation rates, while the spatial distribution of specific ice types and impurities is of secondary importance. The findings recommend improving albedo parameterizations by assessing the representativeness of time-averaged reflectance data products and using temporally-resolved functions to describe impurity distribution variability at daily time-scales.
Article
Astronomy & Astrophysics
Craig P. Hammock, Bernd Kulessa, John F. Hiemstra, Andrew J. Hodson, Alun Hubbard
Summary: This study investigates the formation and internal structure of open-system pingos in a specific location, using seismic measurements and electrical resistivity tomography. The results suggest that sediment grain size and moisture availability play important roles in pingo formation.
EARTH AND SPACE SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Aleksei Kishankov, Pavel Serov, Stefan Bunz, Henry Patton, Alun Hubbard, Rune Mattingsdal, Sunil Vadakkepuliyambatta, Karin Andreassen
Summary: The Barents Sea has experienced intense erosion due to uplift and glaciation, leading to hydrocarbon leakage. The primary factors controlling gas leakage include erosion amount, distribution, and timing of glaciation. Analyzing the results, approximately 20% of oil and gas was lost during the first deglaciation episode, followed by an additional 15% decrease in gas due to seal breach.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geochemistry & Geophysics
R. Vachon, P. Schmidt, B. Lund, A. Plaza-Faverola, H. Patton, A. Hubbard
Summary: This study investigates the evolution of glacial stress field in the Arctic and its impact on near-surface geological processes, such as methane seepage and faulting. The findings suggest that glacial stresses can have significant effects on the upper lithosphere, especially in areas with thick ice cover.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geography
Tom Bradwell, Martyn Stoker
Summary: The seabed landscape around the Summer Isles in NW Scotland contains well-preserved subaqueous moraines that formed during the Late Pleistocene. These moraines provide important evidence of the retreat of large outlet glaciers during the last glaciation. Some of these moraines are connected to onshore ice-sheet moraines and date back to approximately 15.5 thousand years ago.
SCOTTISH GEOGRAPHICAL JOURNAL
(2023)
Article
Geography, Physical
Neil McDonald, Tom Bradwell, S. Louise Callard, Jaime L. Toney, Briony Shreeve, James Shreeve
Summary: This research investigates the potential of computed laminography (CL), a new high-resolution, non-destructive X-ray imaging technique, for analysing and characterising glaciomarine sediments. The study proposes a tool, Sediment Characteristics, which extracts sediment properties and quantifies the abundance of gravel clasts. The research also demonstrates the potential of CL in analysing other 3-dimensional structures.
QUATERNARY SCIENCE ADVANCES
(2022)
Article
Environmental Sciences
Hans Petter Sejrup, Berit Oline Hjelstuen, Henry Patton, Mariana Esteves, Monica Winsborrow, Tine Lander Rasmussen, Karin Andreassen, Alun Hubbard
Summary: Information from former ice sheets is crucial for understanding the response of current ice sheets to external forces. This study reconstructs the last deglaciation of marine sectors of the Eurasian Ice Sheet, highlighting the separation of ice sheets due to the retreat of ice streams in the Norwegian Channel, Barents Sea, and Kara-Barents Sea-Svalbard regions. The study shows that the deglaciation was primarily driven by temperature-related surface mass balance in the south and oceanic conditions in the north, emphasizing the nonlinearity in ice sheet response and the significance of ocean-ice-atmosphere dynamics.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)