Article
Multidisciplinary Sciences
Xingchen Tony Wang, Yuwei Wang, Alexandra Auderset, Daniel M. Sigman, Haojia Ren, Alfredo Martinez-Garcia, Gerald H. Haug, Zhan Su, Yi Ge Zhang, Birger Rasmussen, Alex L. Sessions, Woodward W. Fischer
Summary: This study reveals the expansion of ODZs in the southeastern Pacific since the late Miocene, accompanied by a major increase in ocean nutrient content, indicating a connection between the formation and development of modern ODZs and historically high concentrations of seawater phosphate.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Geochemistry & Geophysics
Fajun Sun, Yang Wang, Nina G. Jablonski, Sukuan Hou, Xueping Ji, Burt Wolff, Aradhna Tripati, Jiayong Cao, Xin Yang
Summary: The Late Miocene in the Shuitangba area exhibited a wetter climate with stronger precipitation seasonality and an average temperature 3 to 4 degrees Celsius higher than today. Comparisons with the Siwalik region suggest earlier spread of C-4 biomass and more pronounced transition to a drier habitat in the Siwalik region relative to Yunnan, possibly linked to the unique growth history of the Himalayan-Tibetan Plateau.
Article
Geography, Physical
M. Alam, M. Tripti, G. P. Gurumurthy, Y. Sohrin, M. Tsujisaka, A. D. Singh, S. Takano, K. Verma
Summary: The study investigates the oxygenation history of the northeastern Arabian Sea since the late Miocene using redox sensitive elemental and metal stable isotopic signatures in deep-sea sediments. The results indicate varying oxygenation conditions in the water column during different periods.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Environmental Sciences
Yuanyuan Sun, Yu Liang, Hu Liu, Jun Liu, Junliang Ji, Xue Ke, Xiaobo Liu, Yuxin He, Huanye Wang, Bin Zhang, Yongsu Zhang, Guangsheng Zhuang, Junling Pei, Yongxiang Li, Cheng Quan, Jianxing Li, Jonathan C. Aitchison, Weiguo Liu, Zhonghui Liu
Summary: Unusual geochemical indicators of marine signatures in the Cenozoic terrestrial strata of the Qaidam Basin suggest a mid-Miocene basin altitude close to sea level, providing evidence for the outward growth of the Tibetan Plateau and its subsequent uplift.
COMMUNICATIONS EARTH & ENVIRONMENT
(2023)
Article
Geosciences, Multidisciplinary
Emily E. Joyce, Sawyer J. Balint, Meredith G. Hastings
Summary: This study quantified the concentrations and stable isotopic composition of aerosol nitrate in the equatorial Pacific, and found that marine-derived alkyl nitrates play an important role in the formation of aerosol nitrate.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Xiao-Yun Nan, Fei Wu, Hui-Min Yu, Jin-Ting Kang, Yong-Jun Gao, Fang Huang
Summary: This study investigates the behavior of barium isotopes during low-temperature seawater alteration and high-temperature hydrothermal alteration processes in the oceanic crust. The results show that the barium isotope compositions of the volcanic section and sheeted dike complex have large variations, possibly due to modification by seawater and hydrothermal fluid. The samples from the plutonic complex display lighter barium isotope compositions, reflecting the influence of late magmatic fluids. The recycling of the altered oceanic crust could result in barium isotope heterogeneity in the mantle.
Article
Geochemistry & Geophysics
Jiayi Lu, Huan Yang, Michael L. Griffiths, Natalie J. Burls, Guoqiao Xiao, Jilong Yang, Jessica K. Wang, Kathleen R. Johnson, Shucheng Xie
Summary: The study suggests that during the Early Pliocene, the redistribution of monsoon rainfall across East Asia was likely due to the equatorward contraction of the western Pacific warm pool, reduced summer convection in the western subtropical Pacific, and the strengthening of the Hadley and Walker circulations.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Rachel M. Brown, Thomas B. Chalk, Anya J. Crocker, Paul A. Wilson, Gavin L. Foster
Summary: The late Miocene cooling event was accompanied by a decline in carbon dioxide, and the equilibrium climate sensitivity during this time period was comparable to the late Pleistocene and the twenty-first century.
Article
Geochemistry & Geophysics
Brian A. Haley, Yingzhe Wu, Jesse M. Muratli, Chandranath Basak, Leopoldo D. Pena, Steven L. Goldstein
Summary: Data on dissolved rare earth elements and neodymium isotopes in the Eastern Equatorial Pacific were compared with other data to evaluate current geochemical theories, revealing inconsistencies and suggesting non-conservative components may be at play in the water column.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geochemistry & Geophysics
Keiran A. Swart, Sergey Oleynik, Alfredo Martinez-Garcia, Gerald H. Haug, Daniel M. Sigman
Summary: By using foraminifera-bound organic matter (FBOM) delta C-13 as a potential proxy for dissolved CO2 concentration, researchers have achieved higher precision testing with new protocols and instruments. They found an inverse correlation between FBOM-delta C-13 and surface water [CO2(aq)], indicating the potential for FBOM-delta C-13 to serve as a paleoceanographic proxy for atmospheric pCO2.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geosciences, Multidisciplinary
Lin Li, Guillaume Dupont-Nivet, Yani Najman, Mustafa Kaya, Niels Meijer, Marc Poujol, Jovid Aminov
Summary: This study confirms a phase of geological deformation and surface uplift in the Pamir during the middle-late Miocene, indicated by changes in detrital zircon U-Pb age spectra, mudstone bulk-rock epsilon(Nd) values, and stable isotopic values of carbonate cements. These changes suggest different sediment sources and shifts in climate environment.
Article
Geosciences, Multidisciplinary
Wenlong Pei, Jiayue Wang, Xinling Wang, Liang Du, Yipeng Wang, Yujin Fan, Rui Zhang, Tiegang Li, James Russell, Fan Zhang, Xiaoxiao Yu, Zhiyong Liu, Minglei Guan, Qi Han
Summary: The tropical western Pacific (TWP) is important in modulating the global climate through solar radiation, sea surface temperature, and monsoon circulation. Fluctuations in marine primary productivity in the TWP can impact the global carbon cycle. However, there is currently a lack of isotopic geochemical evidence to reconstruct changes in productivity in the western Pacific warm pool (WPWP).
Article
Geosciences, Multidisciplinary
Zhimin Jian, Jimin Yu, Yue Wang, Haowen Dang, Minhan Dai, Chen Li, Xuan Ji, Xingxing Wang, Yue Chen
Summary: The study finds that the oceanic dynamics in the equatorial Pacific during the last deglaciation to early Holocene led to different exchange of atmospheric CO2, resulting in the Western equatorial Pacific becoming a sink for CO2.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Multidisciplinary Sciences
Yunfa Miao, Xiaomin Fang, Jimin Sun, Wenjiao Xiao, Yongheng Yang, Xuelian Wang, Alex Farnsworth, Kangyou Huang, Yulong Ren, Fuli Wu, Qingqing Qiao, Weilin Zhang, Qingquan Meng, Xiaoli Yan, Zhuo Zheng, Chunhui Song, Torsten Utescher
Summary: This study uses pollen records to investigate the uplift of the northern Tibet Plateau during the Late Miocene. The results suggest that the entire plateau may have reached a high elevation similar to today, with significant impacts on atmospheric precipitation and alpine biodiversity.
Article
Geosciences, Multidisciplinary
Daniele Reghellin, Helen K. Coxall, Gerald R. Dickens, Simone Galeotti, Jan Backman
Summary: The late Miocene-early Pliocene biogenic bloom has been observed in eastern sites of the equatorial Pacific, but its full extent and geometry in the western sites are still not fully understood. This study reveals that the equatorial upwelling in the western Pacific generated cooler sea surface temperatures and was more focused and deviated from the equator during the bloom period.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Claudia Agnini, Jan Backman, Flavia Boscolo-Galazzo, Daniel J. Condon, Eliana Fornaciari, Simone Galeotti, Luca Giusberti, Paolo Grandesso, Luca Lanci, Valeria Luciani, Simonetta Monechi, Giovanni Muttoni, Heiko Paelike, Maria Letizia Pampaloni, Cesare A. Papazzoni, Paul N. Pearson, Johannes Pignatti, Isabella Premoli Silva, Isabella Raffi, Domenico Rio, Lorenzo Rook, Diana Sahy, David J. A. Spofforth, Cristina Stefani, Bridget S. Wade
Summary: The base of the Priabonian Stage has been identified at meter 63.57 of the Alano section in NE Italy, using the prominent crystal tuff layer called the Tiziano bed as a marker. Several bio-magnetostratigraphic events have been used to approximate this boundary, ensuring a high degree of correlatability across wide geographic areas. Radioisotopic data and cyclostratigraphic analysis provide an absolute age for the base of the Priabonian Stage.
Article
Geography, Physical
J. T. Andrews, L. Smik, S. T. Belt, M-A Sicre, I. N. McCave
Summary: The study utilized various methods to derive a paleoclimate scenario for the North Iceland area up to approximately 65,000 years ago, indicating the presence of icebergs and drifting sea ice during the Holocene. Biomarker and sediment data suggest sea ice cover and iceberg transport during Marine Isotope Stages 2-3, pointing towards nearly continuous sea ice cover and southward drifting icebergs in the seas north of Iceland.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Multidisciplinary Sciences
Flavia Boscolo-Galazzo, Katherine A. Crichton, Andy Ridgwell, Elaine M. Mawbey, Bridget S. Wade, Paul N. Pearson
Summary: The study shows that the efficiency of the biological carbon pump increased with global ocean cooling, leading to increased food delivery at depth and the development of new deep-water niches, which triggered the evolution of deep plankton.
Article
Geography, Physical
Marie-Alexandrine Sicre, Bassem Jalali, Jon Eiriksson, Karen-Luise Knudsen, Vincent Klein, Violaine Pellichero
Summary: The study reveals that during the Holocene in the North Atlantic, sea surface temperature variations differed between north Iceland and the eastern flank of Reykjanes Ridge, with unstable SSTs in north Iceland and more stable temperatures on the eastern side. Changes in sea temperature in the North Atlantic during different stages of the Holocene were influenced by Arctic water incursions, circulation intensification, and temporary collapses of deep-water circulation.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geosciences, Multidisciplinary
Lyndsey R. Fox, Bridget S. Wade, Ann Holbourn, Melanie J. Leng, Rehemat Bhatia
Summary: The study reveals that there was an east-west temperature gradient of approximately 4 degrees Celsius during the warmest period of the Neogene, and this gradient remained stable across the middle Miocene climate transition. Additionally, a 2 degrees Celsius sea surface cooling in the eastern equatorial Pacific was observed, lagging the benthic foraminiferal delta O-18 positive shift by 150 kyr. The reconstructed variations in seawater delta O-18 composition indicated a freshening in the eastern Pacific Ocean after 13.8 Ma due to changes in the hydrological cycle and tropical fronts in response to the new icehouse regime.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2021)
Article
Geography, Physical
Valeria Luciani, Roberta D'Onofrio, Gerald R. Dickens, Bridget S. Wade
Summary: This study investigates fluctuations in the coiling direction within Morozovella assemblages from three Atlantic Ocean Drilling Program sites spanning the Early Eocene Climate Optimum, revealing a potential link between changes in coiling direction and environmental fluctuations.
GLOBAL AND PLANETARY CHANGE
(2021)
Correction
Multidisciplinary Sciences
Silvia Spezzaferri, Michal Kucera, Paul Nicholas Pearson, Bridget Susan Wade, Sacha Rappo, Christopher Robert Poole, Raphael Morard, Claudio Stalder
Article
Environmental Sciences
Youcheng Bai, Marie-Alexandrine Sicre, Jian Ren, Bassem Jalali, Vincent Klein, Hongliang Li, Long Lin, Zhongqiang Ji, Liang Su, Qingmei Zhu, Haiyan Jin, Jianfang Chen
Summary: Paleo-climate proxy records have revealed the fluctuations of sea-ice extent in the Chukchi Sea since the late 19th century, with changes indicating transient retreats and returns to perennial ice cover. Recent decades have seen an acceleration of terrigenous inputs and increased surface ocean stratification, leading to a decline in sea-ice cover. The potential drivers of these observed changes include the Arctic oscillation, Pacific decadal oscillation, and Atlantic Multidecadal Oscillation.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Geology
David J. King, Bridget S. Wade, C. Giles Miller
Summary: Planktonic foraminifera exhibit either sinistral or dextral coiling. The prevalence of coiling direction can change within morphospecies over time. Despite known preferential coiling directions in many species, no coiling shifts have been applied beyond the late Miocene. This study investigates selected Miocene species and confirms a coiling shift in the mid Miocene at approximately 15 Ma.
NEWSLETTERS ON STRATIGRAPHY
(2023)
Article
Multidisciplinary Sciences
Katherine A. Crichton, Jamie D. Wilson, Andy Ridgwell, Flavia Boscolo-Galazzo, Eleanor H. John, Bridget S. Wade, Paul N. Pearson
Summary: Paleontological reconstructions show that plankton in the deep-dwelling 'twilight zone' during warm periods of the last 66 million years were less abundant and diverse, and lived closer to the surface. This is due to temperature's effect on the rate of organic matter breakdown, which is faster at warmer temperatures. Our study using an Earth system model reveals that anthropogenic warming could have significant impacts on carbon cycling and twilight zone ecology, leading to widespread ecological disruption by 2100 without strong emissions mitigation.
NATURE COMMUNICATIONS
(2023)
Article
Paleontology
Marcin Latas, Paul N. Pearson, Christopher R. Poole, Alessio Fabbrini, Bridget S. Wade
Summary: In this study, a new morphospecies of fossil planktonic foraminifera, Globigerinoides rublobatus n. sp., is described from Pleistocene sediments of the Indian Ocean and Pacific Ocean. The new morphospecies shows morphological variability and is found to occur in two variants, a pigmented (pink) form and a non-pigmented (white) form. This finding of pink pigmentation is rare among fossil planktonic foraminifera, with only two previous instances reported.
JOURNAL OF MICROPALAEONTOLOGY
(2023)
Review
Green & Sustainable Science & Technology
Marieke Schuitz, Victor Brun, Molly Wingate, Philippe Cury, Francoise Gall, Marie-Alexandrine Sicre, Joachim Claudet
Summary: Marine protected areas are essential for ocean protection policies, but many fail due to weak levels of protection. Using France as a case study, we propose a three-step framework to identify barriers and design an action plan. Stakeholders' perceptions and limited interaction with decision makers hinder the transition from ambitions to action. Our suggested two-tiered action plan focuses on enhancing participation, holding decision makers accountable, mobilizing financial capital, and simplifying governance.
Article
Paleontology
Paul N. Pearson, Eleanor John, Bridget S. Wade, Simon D'haenens, Caroline H. Lear
Summary: This study presents evidence that radially orientated crystalline spine-like structures occur in the centre of muricae in various species of Acarinina and Morozovella, suggesting they may have similar functions as spines in modern species.
JOURNAL OF MICROPALAEONTOLOGY
(2022)
Article
Ecology
Flavia Boscolo-Galazzo, Amy Jones, Tom Dunkley Jones, Katherine A. Crichton, Bridget S. Wade, Paul N. Pearson
Summary: The fossil record of marine microplankton provides insights into the evolutionary drivers behind the origin of modern deep-water plankton. Research over the past 15 million years shows that global cooling and increased efficiency of the biological pump have favored the evolution of deep-water organisms.
Article
Evolutionary Biology
Alessio Fabbrini, Ilaria Zaminga, Thomas H. G. Ezard, Bridget S. Wade
Summary: This study utilized scanning electron microscope analyses of specimens from Ocean Drilling Program sites to reveal transitional individuals between Sphaeroidinellopsis disjuncta and Sphaeroidinellopsis kochi, leading to proposed amendments to the current classification and taxonomy of these morphospecies. An alternative hypothesis is presented and discussed to evaluate these new observations within the evolutionary mosaic of Sphaeroidinellopsis.
JOURNAL OF SYSTEMATIC PALAEONTOLOGY
(2021)