Article
Geography, Physical
Alberto Sanchez, D. Carriquiry
Summary: A high-resolution record of 818O and 813C was used to reconstruct water column conditions in the SW margin of the Baja California peninsula, showing significant variability during different periods and indicating rapid cooling and/or increase in salinity associated with certain events.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Multidisciplinary Sciences
Bruna B. Dias, Alexander M. Piotrowski, Catia F. Barbosa, Igor M. Venancio, Cristiano M. Chiessi, Ana Luiza S. Albuquerque
Summary: Continental shelves have the potential to remove atmospheric carbon dioxide through the biological pump, burying it in seafloor sediments. The efficiency of marine carbon sequestration is influenced by changes in biological productivity, organic carbon oxidation, and burial rate. The study shows a strong relationship between marine carbon sequestration changes and rare earth element patterns in authigenic oxides, suggesting a connection between higher biological productivity and stronger particle reactive element cycling during rapid climate change events.
SCIENTIFIC REPORTS
(2021)
Article
Geosciences, Multidisciplinary
F. L. Buckingham, S. A. Carolin, J. W. Partin, J. F. Adkins, K. M. Cobb, C. C. Day, Q. Ding, C. He, Z. Liu, B. Otto-Bliesner, W. H. G. Roberts, S. Lejau, J. Malang
Summary: Recent research has found millennial-scale variability in the Indo-Pacific Warm Pool region during the last deglaciation. By studying a new stalagmite oxygen isotope record from northern Borneo, distinct oxygen isotope variations connected with the Bolling-Allerod onset and the Younger Dryas event were discovered. The Borneo stalagmite proxy reconstruction closely resembles a rainfall simulation of the area during the deglaciation period.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
N. El Bani Altuna, M. M. Ezat, M. Greaves, T. L. Rasmussen
Summary: The study found significant changes in bottom water temperature and oxygen isotopes in the Nordic Seas during glacial Greenland Interstadial and Greenland Stadial events, revealing different environmental conditions. The results suggest that during some Stadials and Heinrich Stadials, deep water generation was reduced, allowing the spreading of Atlantic subsurface water to the Nordic Seas.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2021)
Article
Geography, Physical
Victor M. Giraldo-Gomez, Maria Rose Petrizzo, Gabriele Gambacorta, Cinzia Bottini, Silvia E. Gilardoni, Elisabetta Erba
Summary: The benthic foraminiferal assemblages from the Scaglia Bianca Formation in Italy provide a detailed record of faunal changes during the Oceanic Anoxic Event 1d (OAE 1d). Integration of different proxies allows reconstruction of water conditions during this event. Prior to OAE 1d, stable mesotrophic conditions were observed. During OAE 1d, there was an increase in infaunal taxa suggesting mesotrophic conditions and hypoxic/anoxic conditions in bottom waters. After OAE 1d, there was a restoration of oxygen conditions and continued mesotrophic regime in bottom waters.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Biodiversity Conservation
Blanca Figuerola, Ethan L. Grossman, Noelle Lucey, Nicole D. Leonard, Aaron O'Dea
Summary: Coastal hypoxia poses an increasing threat to coral reefs, especially in Almirante Bay, where deep water hypoxia is expanding towards shallower depths. Human activities are likely contributing to the expansion of hypoxic areas, putting shallow reefs at greater risk.
Article
Geography, Physical
Samanta Trotta, Maria Marino, Antje Helga Luise Voelker, Teresa Rodrigues, Patrizia Maiorano, Jos Prime E-Abel Flores, Angela Girone, Marina Addante, Barbara Balestra
Summary: This study investigates the variations of Coccolithophore in the Gulf of Cadiz during the Early Pleistocene period. It finds that temperature and nutrient availability are the main factors influencing Coccolithophore, and the glacial-interglacial cycles have a significant impact on the composition and abundance of Coccolithophore. The study also suggests a connection between the climate dynamics in the Gulf of Cadiz and the dynamics of the ice sheets in the northern hemisphere.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geography, Physical
Sharon Sharon, Christina L. Belanger
Summary: Comparative analyses show that dysoxic events in the Gulf of Alaska are of equal severity but shorter duration compared to sites in California during the Holocene and MIS3 interstadials. Differences in oxygenation levels may be related to the influence of North Pacific Intermediate Water and the California Undercurrent. Strengthening of the California Undercurrent could lead to reduced dissolved oxygen levels in the subpolar North Pacific.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Multidisciplinary Sciences
Hitoshi Hasegawa, Nagayoshi Katsuta, Yasushi Muraki, Ulrich Heimhofer, Niiden Ichinnorov, Hirofumi Asahi, Hisao Ando, Koshi Yamamoto, Masafumi Murayama, Tohru Ohta, Masanobu Yamamoto, Masayuki Ikeda, Kohki Ishikawa, Ryusei Kuma, Takashi Hasegawa, Noriko Hasebe, Shoji Nishimoto, Koichi Yamaguchi, Fumio Abe, Ryuji Tada, Takeshi Nakagawa
Summary: Understanding climate variability and stability under extremely warm 'greenhouse' conditions in the past is crucial for future climate predictions. Scientists have studied lake deposits from the late Early Cretaceous in southeastern Mongolia, and found continuous records of decadal to orbital-scale continental climate variability. The results indicate that solar activity influences climate on decadal to centennial timescales, and internal processes may amplify millennial-scale variations.
SCIENTIFIC REPORTS
(2022)
Review
Geosciences, Multidisciplinary
Irene Cornacchia, Marco Brandano, Samuele Agostini
Summary: Miocene is a crucial period for the global climate evolution and the geodynamic evolution of the Mediterranean basin, with global and regional factors controlling Miocene Mediterranean oceanography. Changes in Mediterranean shallow-water carbonate production were influenced by oceanographic conditions. The evolution in the Mediterranean from the early Miocene to the early Messinian was affected by factors such as regional tectonics, volcanism, and Indo-Pacific closure, impacting the composition of carbonate production and the development of coral reefs and other carbonate structures.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geosciences, Multidisciplinary
Maria Rose Petrizzo, Giulia Amaglio, David K. Watkins, Kenneth G. MacLeod, Brian T. Huber, Takashi Hasegawa, Erik Wolfgring
Summary: Investigating the biotic response and paleoceanographic conditions during the OAE 2 event at high southern latitudes provides valuable insights into water mass stratification dynamics and paleobathymetric reconstruction, supported by reliable bio-chronostratigraphic framework from calcareous nannofossils.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2022)
Article
Geography, Physical
Harshit Singh, Arun Deo Singh, Ravi Tripathi, Pradyumna Singh, Komal Verma, Antje H. L. Voelker, David A. Hodell
Summary: Changes in Earth's orbital parameters pace the Pleistocene glacial-interglacial cycles, and this study analyzes high-resolution planktic foraminiferal proxies to explore the last three terminations and subsequent interglacials. The results reveal abrupt climatic events during these terminations and a complex history of stadials with a possible cause being European ice-sheet melting. The study also documents major reorganization of the surface current system, oceanographic fronts, and productivity conditions across these terminations, as well as broad similarities in the climatic evolution of Holocene, MIS 5e, and 7e interglacials.
GLOBAL AND PLANETARY CHANGE
(2023)
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
Geography, Physical
Joanna Davies, Anders Moller Mathiasen, Kristiane Kristiansen, Katrine Elnegaard Hansen, Lukas Wacker, Aage Kristian Olsen Alstrup, Ole Lajord Munk, Christof Pearce, Marit-Solveig Seidenkrantz
Summary: The melting of marine terminating glaciers in Northeast Greenland is attributed to warming of Atlantic Water. The retreat of glaciers in the Northeast Greenland Ice Stream (NEGIS) area began at least 12.5 thousand years ago and underwent multiple changes. In the Late Holocene, the flow of Atlantic Water resumed, likely leading to the breakup of perennial sea ice.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Geosciences, Multidisciplinary
Gerhard Schmiedl, Yvonne Milker, Andreas Mackensen
Summary: The biodiversity of deep-sea ecosystems is influenced by climate changes and resource availability. The diversity and species composition of benthic foraminifera serve as indicators of these changes. Highly diverse deep-sea ecosystems are more resilient to disturbances, while oligotrophic and well-ventilated ecosystems experience lower diversity due to seasonal pulses of phytodetritus.
EARTH-SCIENCE REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Samantha J. Langton, Nathan M. Rabideaux, Chiara Borrelli, Miriam E. Katz
Article
Multidisciplinary Sciences
R. Bernhart Owen, Veronica M. Muiruri, Tim K. Lowenstein, Robin W. Renaut, Nathan Rabideaux, Shangde Luo, Alan L. Deino, Mark J. Sier, Guillaume Dupont-Nivet, Emma P. McNulty, Kennie Leet, Andrew Cohen, Christopher Campisano, Daniel Deocampo, Chuan-Chou Shen, Anne Billingsley, Anthony Mbuthia
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2018)
Article
Geography, Physical
R. Bernhart Owen, Robin W. Renaut, Veronica M. Muiruri, Nathan M. Rabideaux, Tim K. Lowenstein, Emma P. McNulty, Kennie Leet, Daniel Deocampo, Shangde Luo, Alan L. Deino, Andrew Cohen, Mark J. Sier, Christopher Campisano, Chuan-Chou Shen, Anne Billingsley, Anthony Mbuthia, Mona Stockhecke
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2019)
Article
Geology
D. M. Deocampo, R. B. Owen, T. K. Lowenstein, R. W. Renaut, N. M. Rabideaux, A. Billingsley, A. Cohen, A. L. Deino, M. J. Sier, S. Luo, C-C Shen, D. Gebregiorgis, C. Campisano, A. Mbuthia
Summary: Lake Magadi is an internally drained, saline and alkaline terminal sump in the southern Kenya Rift. The lake's sediment contains some of the highest concentrations of transition metals and metalloids ever reported, including redox-sensitive elements molybdenum, arsenic, and vanadium. The occurrences of euxinia and sulfide precipitation in the lake were common after ca. 700 ka and tended to happen during periods of high orbital eccentricity, which could have influenced water balance in terrestrial habitats and resource availability for early hominins.
Article
Geosciences, Multidisciplinary
A. Cohen, C. Campisano, R. Arrowsmith, A. Asrat, A. K. Behrensmeyer, A. Deino, C. Feibel, A. Hill, R. Johnson, J. Kingston, H. Lamb, T. Lowenstein, A. Noren, D. Olago, R. B. Owen, R. Potts, K. Reed, R. Renaut, F. Schaebitz, J. -J. Tiercelin, M. H. Trauth, J. Wynn, S. Ivory, K. Brady, R. O'Grady, J. Rodysill, J. Githiri, J. Russell, V. Foerster, R. Dommain, S. Rucina, D. Deocampo, J. Russell, A. Billingsley, C. Beck, G. Dorenbeck, L. Dullo, D. Feary, D. Garello, R. Gromig, T. Johnson, A. Junginger, M. Karanja, E. Kimburi, A. Mbuthia, T. McCartney, E. McNulty, V. Muiruri, E. Nambiro, E. W. Negash, D. Njagi, J. N. Wilson, N. Rabideaux, T. Raub, M. J. Sier, P. Smith, J. Urban, M. Warren, M. Yadeta, C. Yost, B. Zinaye
SCIENTIFIC DRILLING
(2016)