Article
Geosciences, Multidisciplinary
Elizabeth K. Thomas, Allison A. Cluett, Michael P. Erb, Nicholas P. McKay, Jason P. Briner, Isla S. Castaneda, Megan C. Corcoran, Owen C. Cowling, Devon B. Gorbey, Kurt R. Lindberg, Karlee K. Prince, Jeffrey Salacup
Summary: Changes in ice-sheet size have an impact on atmospheric circulation, as shown by models and limited paleoclimate records. A new study on Baffin Island provides records of summer temperature and precipitation isotopes that span from 12-7 thousand years ago. The results indicate that the correlation between temperature and precipitation changed at 9.8 thousand years ago, suggesting a shift in moisture patterns controlled by ice-sheet high-pressure systems. These findings have implications for future ice-sheet retreat and associated atmospheric circulation changes.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
Xiaolan L. Wang, Merce Casas-Prat, Yang Feng, Alexander Crosby, Val R. Swail
Summary: This study presents and analyzes the historical changes in surface wind speed and ocean surface waves in the Davis Strait Baffin Bay region using Environment Canada's data from 1979 to 2016. The results show significant increases in wind speed and wave height in September-December, with decreases in June. Additionally, the trend intensifies in 2001-16 for both wind speed and wave height in September and December.
JOURNAL OF CLIMATE
(2021)
Article
Meteorology & Atmospheric Sciences
Yue Wu, David P. Stevens, Ian A. Renfrew, Xiaoming Zhai
Summary: The study investigates the ocean response to wintertime sea ice retreat in the Nordic seas using the HiGEM climate model. It finds that under global warming, the impact of ocean response differs from that caused by sea ice retreat, leading to changes in water column mixing, temperature, and salinity.
JOURNAL OF CLIMATE
(2021)
Article
Geosciences, Multidisciplinary
Paul R. Holland, Suzanne L. Bevan, Adrian J. Luckman
Summary: We use an ocean model to calculate sub-ice melting for a succession of Digital Elevation Models of the main trunk of Thwaites Glacier from 2011 to 2022. The ice evolution during this period induces a strong geometrical feedback onto melting. This leads to stronger sub-ice ocean currents, increasing melting by over 30% without any change in forcing from wider ocean conditions. These findings imply that ocean-driven ice loss from Thwaites Glacier may only be weakly influenced by anthropogenic emissions mitigation.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Tyler Pelle, Mathieu Morlighem, Yoshihiro Nakayama, Helene Seroussi
Summary: The future evolution of Totten Glacier is influenced by ocean-driven warm water inflow, with increased ice loss rates expected under high emission scenarios.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Meteorology & Atmospheric Sciences
Kazuya Kusahara, Hiroaki Tatebe, Tomohiro Hajima, Fuyuki Saito, Michio Kawamiya
Summary: Future atmospheric warming can result in enhanced basal melting of Antarctic ice shelves, caused by a combination of warm deep water intrusions and warm surface water formation. This melting will lead to irreversible changes in the Antarctic ice shelves and Southern Ocean climate.
JOURNAL OF CLIMATE
(2023)
Review
Geography, Physical
Nicolas E. Young, Jason P. Briner, Gifford H. Miller, Alia J. Lesnek, Sarah E. Crump, Simon L. Pendleton, Roseanne Schwartz, Joerg M. Schaefer
Summary: Beryllium-10 has become a primary cosmogenic nuclide for quantifying Earth-surface processes. By measuring Be-10 at a precision level of <= 2-3%, researchers can now compare Be-10-based records of glacier and ice-sheet change to independent records of climate variability. The Be-10 measurements over the last 10+ years have provided a detailed picture of ice-margin migration through the early Holocene, showing interruptions in deglaciation by ice-margin readvances or stillstands.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geosciences, Multidisciplinary
Henrik Nohr-Hansen, Gunver Krarup Pedersen, Paul C. Knutz, Jorgen A. Bojesen-Koefoed, Kasia Kamila Silwinska, Jussi Hovikoski, Jon R. Ineson, Lars Kristensen, Jens Therkelsen
Summary: The core analysis of boreholes drilled in northeast Baffin Bay revealed a Lower Cretaceous succession of sandstones, mudstones, and thin coal beds of Albian age, dominated by terrestrial material and brackish-water dinoflagellate cysts. The Upper Cretaceous sedimentary succession of Cenomanian-Turonian age consists of black marine mudstone with varying amounts of discrete sand layers, suggesting deposition in an anoxic-dysoxic to oxygen-restricted paleoenvironment with variable organic richness and petroleum potential.
MARINE AND PETROLEUM GEOLOGY
(2021)
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
Environmental Sciences
Hannah L. Joy-Warren, Kate M. Lewis, Mathieu Ardyna, Jean-Eric Tremblay, Marcel Babin, Kevin R. Arrigo
Summary: As sea ice continues to decline rapidly in the Arctic, the adaptation of phytoplankton to different light conditions was investigated in this study. Three different light regimes – under the ice, in the marginal ice zone, and in open water – were examined during the Green Edge cruise in Baffin Bay in spring-summer 2016. The experiments conducted demonstrated that phytoplankton are well-prepared for a transition to high light conditions, even when originating from low light environments under sea ice.
ELEMENTA-SCIENCE OF THE ANTHROPOCENE
(2023)
Article
Multidisciplinary Sciences
Federico Scoto, Henrik Sadatzki, Niccolo Maffezzoli, Carlo Barbante, Alessandro Gagliardi, Cristiano Varin, Paul Vallelonga, Vasileios Gkinis, Dorthe Dahl-Jensen, Helle Astrid Kjaer, Francois Burgay, Alfonso Saiz-Lopez, Ruediger Stein, Andrea Spolaor
Summary: The decline of sea ice in the North Atlantic and Nordic Seas during the last glacial period, known as Dansgaard-Oeschger (D-O) events, contributed to repeated abrupt atmospheric warmings recorded in Greenland ice cores. By analyzing records from the NEEM ice core and sediment cores, researchers discovered that the replacement of stable multiyear sea ice with seasonal sea ice amplified the abrupt climate warming during D-O events, highlighting the importance of feedbacks associated with seasonal sea ice expansion in driving the North Atlantic ocean-climate system.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Geography, Physical
Emma Ownsworth, David Selby, Jeremy Lloyd, Paul Knutz, Sonke Szidat, John Andrews, Colm O'Cofaigh
Summary: A new study investigates the sediment core from central Baffin Bay to reconstruct the ice sheet history and sediment fluxes. Two dominant sediment/discharge sources, detrital carbonate and radio-genic felsic, are identified. The study also provides updated age constraints and further supports the theory of an ice shelf in northern Baffin Bay.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Geography, Physical
Xingxing Liu, Hu Yang, Shugang Kang, Jef Vandenberghe, Li Ai, Zhengguo Shi, Peng Cheng, Jianghu Lan, Xulong Wang, Youbin Sun
Summary: By analyzing loess samples from the western Chinese Loess Plateau, researchers discovered centennial-scale winter monsoon variability during the Younger Dryas (YD) event. This variability, believed to be caused by variations in North Atlantic sea ice, was transmitted through fast atmospheric processes between the subpolar and mid-latitude regions. Additionally, the study found a decrease in centennial-scale winter monsoon variability during the mid-YD period, which was associated with a shift in the atmospheric polar front and sea ice retreat induced by the resumption of the Atlantic meridional overturning circulation (AMOC).
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Lianne C. Harrison, Paul R. Holland, Karen J. Heywood, Keith W. Nicholls, Alex M. Brisbourne
Summary: This study uses an ocean model to investigate the relationship between surface lowering on the Larsen C Ice Shelf in Antarctica and changes in ocean forcing. The results suggest that ocean warming leads to a reduction in stabilizing marine ice beneath the ice shelf, implying a high sensitivity of the ice shelf's stability to changes in ocean forcing. This finding could have wide implications for other cold-water ice shelves around Antarctica.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geography, Physical
Xingxing Liu, Hu Yang, Shugang Kang, Jef Vandenberghe, Li Ai, Zhengguo Shi, Peng Cheng, Jianghu Lan, Xulong Wang, Youbin Sun
Summary: The Younger Dryas period during the last deglaciation in the Northern Hemisphere experienced multiple rapid climate changes, with a persistent centennial-scale East Asian winter monsoon variability driven by North Atlantic sea ice variation. This variability is closely related to a northward shift of the atmospheric polar front and sea ice retreat induced by the resumption of the Atlantic meridional overturning circulation. Results suggest that the AMOC-induced sea ice change in the North Atlantic plays a dominant role in transmitting abrupt climate signals over the Northern Hemisphere.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Igor Obreht, David De Vleeschouwer, Lars Woermer, Michal Kucera, Devika Varma, Matthias Prange, Thomas Laepple, Jenny Wendt, Sri D. Nandini-Weiss, Hartmut Schulz, Kai-Uwe Hinrichs
Summary: This study established a 4,800-year record of sea surface temperature variability in the eastern Mediterranean Sea using mass spectrometry imaging of long-chain alkenones. The research found that the highest amplitude of decadal temperature variability occurred in the early stage of sapropel deposition during the Last Interglacial, while the subsequent reorganization of oceanographic conditions did not exceed the recent period of warming climate in terms of decadal variability.
Article
Environmental Sciences
Kristian Svennevig, Marie Keiding, Niels Jakup Korsgaard, Antoine Lucas, Matthew Owen, Majken Djurhuus Poulsen, Janina Priebe, Erik Vest Sorensen, Costanza Morino
Summary: On December 15th 1952, a large landslide occurred near the Niiortuut mountain on the south coast of the Nuussuaq peninsula in Greenland, resulting in the collapse of permafrozen talus deposits and the generation of a tsunami. This event is the first historically recorded instance of a landslide-induced tsunami in the Arctic caused by permafrost degradation. The warming of the Arctic region since the early twentieth century is likely to have contributed to this event. Recent landslide activity indicates that warming continues to affect this region.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biodiversity Conservation
Joshua S. Lynn, Ragnhild Gya, Kari Klanderud, Richard J. Telford, Deborah E. Goldberg, Vigdis Vandvik
Summary: Climate change impacts on biota vary across sites, species, and individual species' ranges. Incorporating species' trait information improves predictions about climate responses. Plant height emerges as the most consistent trait associated with species' climate difference sensitivity.
DIVERSITY AND DISTRIBUTIONS
(2023)
Article
Geography, Physical
Vikash Kumar, Manish Tiwari, Dmitry V. Divine, Matthias Moros, Arto Miettinen
Summary: The sedimentary geochemical proxies from western Svalbard fjords provide a detailed account of paleoenvironmental changes in the region, revealing multiple occurrences of warm and cold Arctic spells during the last millennium, which are linked to the variability of the Indian summer monsoon.
GLOBAL AND PLANETARY CHANGE
(2023)
Article
Biodiversity Conservation
Peter Kiss, Natalia Hudackova, Jurgen Titschack, Michael G. R. Siccha, Zuzana Hermanova, Lorand Silye, Andrej Ruman, Samuel Rybar, Michal Kucera
Summary: The evolution of a complex character in two different species suggests the influence of a common environmental factor.
Article
Geography, Physical
J. M. Lloyd, S. Ribeiro, K. Weckstrom, L. Callard, C. Cofaigh, M. J. Leng, P. Gulliver, D. H. Roberts
Summary: Recent observations have shown increased mass loss from Greenland marine-terminating outlet glaciers (MTOGs), which has implications for global sea-level rise and wider ocean circulation. The flow of Atlantic-sourced waters to the Greenland margin is believed to be a key factor in controlling MTOG behavior. Longer-term records of the role of Atlantic-sourced waters on MTOG dynamics are needed to improve understanding of potential future trends.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Ecology
Kaarina Weckstrom, Jan Weckstrom, Juliane Wischnewski, Thomas A. Davidson, Torben L. Lauridsen, Frank Landkildehus, Kirsten S. Christoffersen, Erik Jeppesen
Summary: With the help of paleolimnology, the relationship between diatoms and environmental drivers in the Arctic lakes and ponds of Greenland was explored. The study found that climate and lake ontogeny were the main factors determining diatom communities. The species diversity declined towards the North, and diatoms were proven to be an excellent proxy for climate-mediated lake ecosystem change in the Arctic.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2023)
Article
Environmental Sciences
Tiia Luostarinen, Kaarina Weckstrom, Jens Ehn, Michelle Kamula, Amanda Burson, Aura Diaz, Guillaume Masse, Suzanne McGowan, Zou Zou Kuzyk, Maija Heikkila
Summary: Evolution of sedimentary assemblages of biogenic sea-ice proxies is not an accurate representation of diverse sea-ice connected communities. Direct observations reveal that commonly used Arctic diatoms and dinoflagellate cysts species as sea-ice proxies are indirectly linked to sea-ice conditions, and the sediment assemblages of these groups overrepresent summertime pelagic blooms. The study also finds certain isoprenoid lipids, previously considered indicators of open water, can be produced in sea-ice.
COMMUNICATIONS EARTH & ENVIRONMENT
(2023)
Article
Geochemistry & Geophysics
Rebecca Jackson, Thomas Frederichs, Hartmut Schulz, Michal Kucera
Summary: Baffin Bay Detrital Carbonate (BBDC) layers are sedimentary deposits found throughout Baffin Bay, representing periods of increased discharge of terrigenous sediments, icebergs, and freshwater. These events reflect repeated ice sheet instability periods and have similar statistical properties to Heinrich events but different timing. The link between Arctic and Laurentide Ice sheets instabilities remains unclear.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Biodiversity Conservation
Audrey Limoges, Sofia Ribeiro, Nicolas Van Nieuwenhove, Rebecca Jackson, Stephen Juggins, Xavier Crosta, Kaarina Weckstrom
Summary: The Pikialasorsuaq is an area of cultural and ecological significance that has been experiencing rapid warming and changes in its ice arch. A study on diatom community-level responses showed significant changes over the past 3800 years, with potential implications for the productivity and diversity of the marine food web. Future climate-induced alterations could disproportionately impact higher trophic levels and indigenous peoples, affecting global diversity.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Ecology
Francesca Jaroszynska, Inge Althuizen, Aud Helen Halbritter, Kari Klanderud, Hanna Lee, Richard J. Telford, Vigdis Vandvik
Summary: Biotic and abiotic processes in terrestrial ecosystems are regulated by soil temperature and moisture. Vegetation can regulate soil microclimate, creating potential feedbacks from soil and vegetation on the atmosphere. Our study investigated the role of different plant functional groups in regulating soil microclimate in alpine grasslands. We found that bryophytes significantly reduced soil temperature and the number of freezing days, while graminoids influenced soil moisture. These findings highlight the importance of functional group identity in regulating soil microclimate.
Article
Multidisciplinary Sciences
Vigdis Vandvik, Aud H. Halbritter, Inge H. J. Althuizen, Casper T. Christiansen, Jonathan J. Henn, Ingibjorg Svala Jonsdottir, Kari Klanderud, Marc Macias-Fauria, Yadvinder Malhi, Brian Salvin Maitner, Sean Michaletz, Ruben E. Roos, Richard J. Telford, Polly Bass, Katrin Bjornsdottir, Lucely Lucero Vilca Bustamante, Adam Chmurzynski, Shuli Chen, Siri Vatso Haugum, Julia Kemppinen, Kai Lepley, Yaoqi Li, Mary Linabury, Ilaine Silveira Matos, Barbara M. Neto-Bradley, Molly Ng, Pekka Niittynen, Silje Ostman, Karolina Pankova, Nina Roth, Matiss Castorena, Marcus Spiegel, Eleanor Thomson, Alexander Saele Vagenes, Brian J. Enquist
Summary: The Arctic is warming at an alarming rate and facing other global environmental changes, leading to significant vegetation and ecosystem changes. Integrating functional trait-based approaches with various levels of vegetation, ecosystem, and landscape data provides a comprehensive understanding of the drivers and consequences of these changes. By collecting extensive data, including plant records and trait measurements, this study fills knowledge gaps and expands the coverage of trait data, ultimately enabling assessment of climate and environmental change impacts.
Article
Multidisciplinary Sciences
Michael Siccha, Raphael Morard, Julie Meilland, Shinya Iwasaki, Michal Kucera, Katsunori Kimoto
Summary: This study used x-ray micro computed tomography to reconstruct three-dimensional images of 179 specimens of calcite shells of planktic foraminifera. The images provide a basis for further research on species' functional ecology, calcification intensity, and phylogenetic relationships.
Article
Multidisciplinary Sciences
Doron Pinko, Sigal Abramovich, Eyal Rahav, Natalia Belkin, Maxim Rubin-Blum, Michal Kucera, Raphael Morard, Maria Holzmann, Uri Abdu
Summary: Kleptoplasty, the sequestration of chloroplasts, has been discovered in the miliolid clade species Hauerina diversa, expanding the known distribution of this phenomenon. The functionality of the observed chloroplasts within the foraminiferal cytoplasm was confirmed through genetic analysis. Furthermore, the study suggests a relationship between kleptoplastic foraminifera and symbiotic foraminifera, as evidenced by phylogenetic analysis and the common ancestry of alveolinid symbionts and kleptoplasts.
Article
Ecology
Pauline Cornuault, Thomas Westerhold, Heiko Paelike, Torsten Bickert, Karl-Heinz Baumann, Michal Kucera
Summary: Marine plankton is an important part of the global carbon cycle. This study re-evaluates Neogene pelagic sediments in the tropical Atlantic and reveals significant orbital-scale variability in carbonate accumulation. It suggests that long-term changes in pelagic carbonate production are primarily controlled by orbital cycles in the tropical ocean.
