Article
Geography, Physical
Tianyu Du, Wensheng Zhang, Bing Li, Linjing Liu, Yuecong Li, Yawen Ge, Shiyong Yu
Summary: This article presents sedimentary evidence for a dramatic channel displacement of the lower Yellow River about 3000-2600 years ago, and explains the impact of this displacement on the geomorphology and human migration.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Feng Wu, Xinong Xie, Wen Yan, Youhua Zhu, Beichen Chen, Jianuo Chen, Mo Zhou
Summary: This paper describes the Quaternary evolution of Meiji Atoll in the southern South China Sea. The findings show how variations in sea surface temperature, eustatic sea level, and tectonics have influenced the development of the atoll. These findings have broader implications for understanding the Quaternary evolution of similar tropical carbonate atolls in the region.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Maria Laura Balestrieri, Valerio Olivetti, David Chew, Luca Zurli, Massimiliano Zattin, Foteini Drakou, Gianluca Cornamusini, Matteo Perotti
Summary: This study presents a multidisciplinary provenance study on legacy cores drilled in the central Ross Sea, Antarctica, providing insights into the oscillation of ice flows and advance and retreat phases of the West Antarctic Ice Sheet.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Yingfang Cui, Hao Xu, Yijia Liang, Kan Zhao, Jianshun Chen, Yongjin Wang, Jiaqi Cong, Hai Cheng, Liangcheng Tan
Summary: In this study, an absolutely-dated and high-resolution calcite 818O record from Shima Cave, China was analyzed to determine the timing and duration of the Heinrich Stadial 2 (HS2) event. The results show that the HS2a phase started at -24.4 +/- 0.1 ka BP and ended at -23.6 +/- 0.1 ka BP, lasting approximately 0.8 +/- 0.3 ka. The study also reveals similarities between Chinese cave records and marine sediment cores, particularly in terms of the two-fold structure observed during the HS2a and HS2b phases, which may be related to weakening episodes in the Atlantic Meridional Overturning Circulation.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Xin Wei, Jianbo Liu, Renbin Zhan, Zhiqiang Zhou, Guanzhou Yan
Summary: This study reviewed the available data on the distribution of Middle-early Late Ordovician trilobites in South China and analyzed their diversity dynamics. The results revealed three macroevolutionary phases and three faunal turnovers. Changes in sea level and substrate conditions played a significant role in the faunal replacements. The radiation of trilobites was primarily influenced by the development and expansion of the Whiterock Fauna, with a shift towards outer platform environments over time. Climate cooling, substrate conditions, and increased oxygen levels and nutrients likely provided favorable conditions for trilobite radiation during the Middle Ordovician.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
A. Majchrzyk, M. Jakubowicz, B. Berkowski, J. J. Krol, M. Zaton, M. K. Zapalski
Summary: This article describes a well-preserved reef ecosystem in Madene el Mrakib, Morocco, from the Givetian period, providing insights into the ecological succession and taxonomical structure of the community. The study reveals that the reef community in this area shares notable similarities with modern shallow-water reefs in terms of ecological successions, dominance of branching corals, and adaptations to turbulent conditions.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Fengling Yu, Adam D. Switzer, Zhuo Zheng, Bishan Chen, Jeremy Pile, Harry Jol, Zhaoquan Huang, Annie Lau
Summary: This study examines the Holocene evolution history of Qing'ao Embayment in southern China to gain a better understanding of how sediment-starved coastal systems respond to climate-driven sea level change. The results show that the rates of sea level change and sediment accretion are the major controlling factors for the geomorphological evolution of sediment-starving coastal systems. The evolution of Qing'ao embayment differs from sediment-supply rich large-river estuary/deltas in its response to Holocene sea level change, including delayed sediment accumulation and agricultural activity.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Huyue Song, Shixue Hu, Michael Benton, Dayong Jiang
Summary: This article examines the end Permian to Middle Triassic interval, which witnessed a significant marine mass extinction and delayed recovery. The focus is on Triassic marine sediments in South China, providing unique documentation of the collapse and recovery of marine ecosystems. Several papers analyze different fossils and their ecological significance, while others study biostratigraphy, reconstruct paleoenvironments, and link records to volcanic eruptions.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Mauricius Nascimento Menezes, Patrick Fuhr Dal'Bo, Jon J. Smith, Leonardo Borghi, Michele Arena, Julia Favoreto, Herminio Ismael de Araujo-Junior
Summary: This study investigates the paleosols in Brazilian intracontinental basins and focuses on a hydromorphic paleosol profile in the Lower Cretaceous Itapecuru Formation. The research analyzes clay mineralogy and whole-rock geochemistry to infer pedogenic processes and reconstruct paleoclimate, paleohumidity, and paleovegetation. The results suggest a humid paleoclimate with wet tropical forests during the Cretaceous period.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Lu Wu, Rui Wang, Kefu Yu, Min Ren, Simone Booker, Ruoxia Shen, Wei Jiang, Shendong Xu, Tianlai Fan, Songye Wu, Qiushuang Qin, Xingchi Li
Summary: This study investigates the relationship between the East Asian Summer Monsoon (EASM) and meteoric diagenesis in the Pleistocene carbonate succession on the Xisha Islands, South China Sea. The results show that meteoric diagenesis occurred during periods of low sea-level and was influenced by the relative intensity of the EASM. During strong EASM periods, meteoric diagenesis was intense, resulting in complete alteration of unstable minerals and extreme dissolution.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Mohammad Firoze Quamar, Upasana Swaroop Banerji, Biswajeet Thakur, Ratan Kar
Summary: The Indian Summer Monsoon is a crucial component of the Asian Monsoon System, impacting rainfall, agricultural productivity, and socio-economic growth in India and nearby regions. The central monsoon zone in India is more responsive to strong monsoon phases than weak ones.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Junhee Park, Holly J. Stein, Judith L. Hannah, Svetoslav V. Georgiev, Oyvind Hammer, Snorre Olaussen
Summary: This study reports new Re-Os ages for black shales from Svalbard and evaluates the paleoenvironment during organic-rich shale deposition. The study also proposes correlations of specific Late Jurassic ammonite zones between the Boreal and Tethyan realms.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
P. Depuydt, S. Toucanne, C. Barras, S. Le Houedec, M. Mojtahid
Summary: This study provides a comprehensive overview of the dynamics of the upper branch of the Atlantic Meridional Overturning Circulation (AMOC) in the mid-latitudes of the Northeast Atlantic. It focuses on the European Slope Current (ESC) and its glacial equivalent known as the Glacial Eastern Boundary Current (GEBC). The study reveals significant changes in flow strength and ventilation during the glacial and deglaciation periods, as well as a gradual weakening of the slope current during the Holocene.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Francois Fournier, Thomas Teillet, Alexis Licht, Jean Borgomano, Lucien Montaggioni
Summary: This study investigates the temporal evolution of neritic carbonates in the proto-South China Sea to reconstruct East Asian monsoonal currents and winds during the middle to late Paleogene. The results highlight that many of the features of the summer East Asian Monsoon large-scale circulation are rooted in the middle Paleogene.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Aubrey L. Hillman, Sumar B. Hart, Vann Smith, Sophie Warny
Summary: This study summarizes three lake sediment records from the southeastern United States (SE US) to test the importance of the Pacific North American (PNA) pattern and the North Atlantic Oscillation (NAO) over the last 5000 years. The results indicate relatively stable hydroclimate conditions before historical European settlement, but significant and rapid changes occurred in vegetation and lake hydrologic balance after settlement.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Bing-Cai Liu, Rui-Wen Zong, Kai Wang, Jiao Bai, Yi Wang, Hong-He Xu
Summary: Phytogeography plays a vital role in the evolution of plants. This paper describes a new species of a spore-bearing plant from the upper Silurian period in West Junggar, China. By analyzing global Silurian macrofossil records, the study reveals the spatial-temporal distribution of Silurian plant macrofossils and identifies two phytogeographic realms during the Pridoli Epoch.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Guocheng Dong, Weijian Zhou, Feng Xian, Yunchong Fu, Li Zhang, Ling Tang, Pengkai Ding
Summary: The cause of ice-age cycles is still not fully understood, and studying the timing and magnitude of mountain glaciations can provide valuable insights. This study presents new dating results from the Niqingqu Valley in the Tibetan Plateau, showing multiple glacial activities prior to the Penultimate Glacial Maximum. The findings suggest that low atmospheric CO2 content and reduced summer solar insolation/high summer-monsoon precipitation played a role in these glacial fluctuations.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geography, Physical
Haoran Dong, Zhitong Chen, Yucheng Wang, Jie Chen, Zhiping Zhang, Zhongwei Shen, Xinwei Yan, Jianbao Liu
Summary: Through sediment records from Lake Nanyi in the lower Yangtze, we found that anthropogenic fire activity played a dominant role in the region, and the temporal pattern of fire activity was asynchronous from east to west. Archaeological evidence suggests an inverse relationship between agricultural and population levels and fire intensity during the mid-Holocene, with fire intensity being influenced by the diversity of landscape types associated with pre-historic subsistence patterns. Overall, changes in regional water-level delayed the transition from hunting-gathering to agriculture in the lower Yangtze region.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2024)
Article
Geology
Ottilia Szives, Josep A. Moreno-Bedmar, Beatriz Aguirre-Urreta, Miguel Company, Camille Frau, Mikel Lopez-Horgue, Antoine Pictet, Izabela Ploch, Christian Salazar, Ricardo Barragan, Jean -Louis Latil, Jens Lehmann, Stephane Reboulet, Emmanuel Robert
Summary: The 7th meeting of the IUGS Lower Cretaceous Ammonite Working Group discussed important changes in the geological age classification, including adjustments and improvements to the upper Tithonian-Berriasian, upper Aptian, and Albian stages. The meeting also discussed the Valanginian and Hauterivian stages, and provided discussions on zonal indices and units, emphasizing the use of interval zones and subzones.
CRETACEOUS RESEARCH
(2024)
Article
Plant Sciences
Adele C. M. Julier, Glynis J. Humphrey, Caitlin Dixon, Lindsey Gillson
Summary: The relationships between woody vegetation cover and fire, climate, herbivory, and human activities in African savanna ecosystems are complex. Fire suppression policies implemented in a national park in northeast Namibia from 1888 to 2005 did not lead to noticeable decreases in fire or enhanced tree recruitment, suggesting that fire occurrence in savanna ecosystems is more closely linked to climate than management. Fire management should adapt to rainfall variability and integrate customs of early dry season burning.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
