Article
Geography, Physical
Guillaume Michel, Mark Coughlan, Riccardo Arosio, Andy R. Emery, Andrew J. Wheeler
Summary: Based on an extensive seismic dataset analysis, this study proposes an updated stratigraphic model of the northern Irish Sea and maps newly discovered geomorphology to enhance the constraints on ice sheet retreat. The transition from the late glacial to marine setting is also determined, and a new conceptual model highlighting the succession of stratigraphic units and associated processes linked to geomorphology is synthesized.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Geography, Physical
David J. A. Evans, David H. Roberts, Mark D. Bateman, Chris D. Clark, Alicia Medialdea, Louise Callard, Elena Grimoldi, Richard C. Chiverrell, Jeremy Ely, Dayton Dove, Colm O. Cofaigh, Margot Saher, Tom Bradwell, Steven G. Moreton, Derek Fabel, Sarah L. Bradley
Summary: The findings of BRITICE-CHRONO Transect 2 in the North Sea Basin and eastern England are reported, with seven distinctive ice-sheet limits constrained by Bayesian statistical analysis. The study reveals the ice-sheet marginal oscillation and retreat trajectory during the last glacial period, shedding light on the evolutionary history of glaciers.
JOURNAL OF QUATERNARY SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Ming Zhang, Yonggang Liu, Jiang Zhu, Zhuoqun Wang, Zhengyu Liu
Summary: In this study, we investigated the changes in climate and Atlantic Meridional Overturning Circulation (AMOC) during the Last Glacial Maximum if there were no dust. Model simulations showed that the removal of dust resulted in a global cooling and weakening of AMOC. This cooling effect was opposite to that observed during the mid-Holocene and was amplified by a positive feedback between sea ice and AMOC.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Meteorology & Atmospheric Sciences
Zhiang Xie, Li Dong, Kaijun Liu
Summary: The study investigates the changes in tropospheric stratification during the Last Glacial Maximum (LGM) using numerical simulations. The results show a decrease in stability in the tropics and an increase in stability in the extratropics during certain seasons. The increased stability over high-latitude ocean is driven by shifts in surface frozen lines, while the stability over ice sheet margins is due to the cooling effect of ice sheet slopes.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Geochemistry & Geophysics
Dillon J. Amaya, Alan M. Seltzer, Kristopher B. Karnauskas, Juan M. Lora, Xiyue Zhang, Pedro N. DiNezio
Summary: The Western U.S. experienced significant hydroclimatic changes during the Last Glacial Maximum (LGM), with a wetter Southwest and drier Pacific Northwest. This study examines the mechanisms behind these shifts and finds that ice sheet albedo influenced sea surface temperatures and altered large-scale atmospheric circulation, leading to changes in west coast precipitation. Importantly, the study suggests that similar hydroclimatic changes could occur today due to atmosphere-ocean feedbacks.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geography, Physical
Dag Ottesen, Christine L. Batchelor, Lilja R. Bjarnadottir, Daniel Hesjedal Wiberg, Julian A. Dowdeswell
Summary: The analysis of glacial landforms on continental margins provides insights into sedimentation processes beneath ice sheets and aids predictions of future ice sheet resilience. This study used high-resolution marine-geophysical data to map and interpret glacial landforms along the mid-Norwegian margin, revealing the dynamic behavior of the Scandinavian Ice Sheet during the last glacial-interglacial cycle. The geometry of the continental shelf played a key role in controlling the pattern of ice-sheet retreat.
QUATERNARY SCIENCE REVIEWS
(2022)
Review
Geography, Physical
Linda Pan, Glenn A. Milne, Konstantin Latychev, Samuel L. Goldberg, Jacqueline Austermann, Mark J. Hoggard, Jerry X. Mitrovica
Summary: This study investigates the impact of lateral variations in Earth structure on predicting far-field sea level and global ice volume estimates at the Last Glacial Maximum. The findings suggest that different Earth model parameters significantly affect the estimates at far-field sites, but no consistent signal is found to reconcile the differences in ice volume estimates.
QUATERNARY SCIENCE REVIEWS
(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)
Article
Geography, Physical
Aleksandr Montelli, Marina Solovyeva, Grigorii Akhmanov, Adriano Mazzini, Anna Piatilova, Elena Bakay, Julian A. Dowdeswell
Summary: New geophysical data from eastern Storbanken in the central Barents Sea reveals the flow of a marine-based ice dome during the final stages of ice-sheet decay. Previous models suggesting a northward-migrating ice dome or crest extending from Svalbard to Franz-Josef Land are contradicted by our findings. The results provide valuable insights into the late-stage decay of marine ice domes and can be used to improve numerical models simulating the behavior of marine-based ice sheets in a warming environment.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Holly Kyeore Han, Natalya Gomez, David Pollard, Robert DeConto
Summary: The study demonstrates that solid Earth deformation and gravitational field perturbations have significant impacts on the evolution of Northern Hemisphere ice sheets, enhancing terrestrial ice sheets during growth phases and stabilizing marine-based ice sheets during retreat phases.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2021)
Article
Geography, Physical
Kwangchul Jang, Youngkyu Ahn, Young Jin Joe, Carmen A. Braun, Young Ji Joo, Jung-Hyun Kim, Germain Bayon, Matthias Forwick, Christoph Vogt, Seung-Il Nam
Summary: The study of the glacimarine sediment core off northern Svalbard provides insights into the variability of sediment provenance and chemical weathering patterns since the last deglaciation, allowing for the identification of distinct paleoclimate events. The dataset indicates retreat and re-advance phases of the Svalbard-Barents Sea Ice Sheet, as well as prolonged supply of radiogenic detrital Nd isotopes, highlighting the utility of Nd isotopes as a proxy for reconstructing paleo-cryosphere changes.
GLOBAL AND PLANETARY CHANGE
(2021)
Article
Geography, Physical
Qing Yan, Ting Wei, Zhongshi Zhang
Summary: Investigation of Patagonian glaciers during the Last Glacial Maximum (gLGM) reveals the sensitivity of these glaciers to climate change. The study shows that temperature and precipitation have significant impacts on the total glacier area and equilibrium-line altitude of Patagonian glaciers. The modeled ice sheet extent and flow pattern during the gLGM match well with empirical reconstructions.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Geosciences, Multidisciplinary
Ryouta O'ishi, Wing-Le Chan, Ayako Abe-Ouchi, Sam Sherriff-Tadano, Rumi Ohgaito, Masakazu Yoshimori
Summary: The study conducted three sets of experiments using different versions of the MIROC model to investigate the Last Interglacial (LIG) and pre-industrial conditions. Results show that only the MIROC4m-LPJ model, which includes dynamic vegetation feedback, exhibits annual warming signals at northern high latitudes, while the latest Earth system model MIROC-ES2L does not, highlighting the importance of full vegetation feedback for accurately simulating strong annual warming in northern high latitudes.
CLIMATE OF THE PAST
(2021)
Article
Geography, Physical
Jing Lei, Zhengguo Shi, Xiaoning Xie, Xinzhou Li
Summary: Based on climate model experiments, this study found that the precipitation during the Last Glacial Maximum (LGM) was significantly different from that of the preindustrial period in the terrestrial monsoon regions and arid regions of the Northern Hemisphere. The decrease in sea surface temperature and expansion of the ice sheet were the main contributors to lessening precipitation in the monsoon regions, while the decrease in precipitation in the arid regions can be mainly attributed to ice-sheet-induced albedo and topography changes.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Multidisciplinary Sciences
Michael E. Weber, Ian Bailey, Sidney R. Hemming, Yasmina M. Martos, Brendan T. Reilly, Thomas A. Ronge, Stefanie Brachfeld, Trevor Williams, Maureen Raymo, Simon T. Belt, Lukas Smik, Hendrik Vogel, Victoria L. Peck, Linda Armbrecht, Alix Cage, Fabricio G. Cardillo, Zhiheng Du, Gerson Fauth, Christopher J. Fogwill, Marga Garcia, Marlo Garnsworthy, Anna Glueder, Michelle Guitard, Marcus Gutjahr, Ivan Hernandez-Almeida, Frida S. Hoem, Ji-Hwan Hwang, Mutsumi Iizuka, Yuji Kato, Bridget Kenlee, Suzanne OConnell, Lara F. Perez, Osamu Seki, Lee Stevens, Lisa Tauxe, Shubham Tripathi, Jonathan Warnock, Xufeng Zheng
Summary: The field of Southern Ocean paleoceanography is vital for understanding the development of iron fertilization and oceanic productivity during Pleistocene ice-ages and their impact on the carbon cycle. A high-resolution record of dust deposition and ocean productivity in the Antarctic Zone has revealed significant changes over the past 1.5 million years, with increased dust deposition during glacials and higher biogenic silica deposition during interglacials. The study also suggests more severe glaciations and changes in ocean productivity over the past 0.9 million years.
NATURE COMMUNICATIONS
(2022)