Article
Geochemistry & Geophysics
R. A. Nascimento, I. M. Venancio, C. M. Chiessi, J. M. Ballalai, H. Kuhnert, H. Johnstone, T. P. Santos, M. Prange, A. Govin, S. Crivellari, S. Mulitza, A. L. S. Albuquerque
Summary: The study revealed the importance of changes in upper ocean circulation in the western tropical Atlantic for the northward heat transport as part of the Atlantic Meridional Overturning Circulation, with seasonal thermocline stratification being driven by precession. Using oxygen isotopes and Mg/Ca, the research confirmed that changes in thermocline temperature predominantly impact stratification.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Review
Geosciences, Multidisciplinary
Liang Chen, Yulong Guan, Liang Zhou, Zhengxin Yin, Zhaoxia Jiang
Summary: This paper systematically summarizes the orbital scale variability of the Indian monsoon since the late Quaternary and discusses some issues related to the driving mechanism of the summer monsoon.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geochemistry & Geophysics
Meng Wang, Mingsong Li, David B. Kemp, Jan Landwehrs, Zhijun Jin
Summary: This study calibrated the astronomical time scale of an Upper Triassic lake sediment succession at St. Audrie's Bay (UK) using statistical tuning approaches, and successfully correlated it with reference sections in the Newark Basin (USA) and Jameson Land Basin (Greenland). The reconstructed lake level changes at St. Audrie's Bay were in-phase with those in the Newark Basin but in anti-phase with those in the Jameson Land Basin, supported by paleoclimate modeling. These hydrological changes in the basins were paced by a 1.8 million-year cyclicity, representing the fingerprint of chaotic behavior of the Solar System.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Debarati Nag, Binita Phartiyal, Mallickarjun Joshi
Summary: The article synthesizes geomorphic indices to understand the prevalence of neotectonic activity in the Ladakh area. Differential tectonic activity is recorded due to the thrusting of Indus Molasse over the rigid Ladakh Batholith and oblique convergence of the Indian plate. Recurrent tectonic activity is observed at various time points, while climatically induced topographic changes occur between similar to 13 and 12 ka.
Article
Meteorology & Atmospheric Sciences
Tresa Mary Thomas, Govindasamy Bala, Srinivas Venkata Vemavarapu, William R. Boosd
Summary: This study investigates the influence of Tibetan and Himalayan orography on monsoon low pressure systems (LPS) using an Earth system model, and finds that removing the Tibetan orography leads to decreased mean monsoon circulation and precipitation, but increased LPS activity. On the other hand, increasing the height of the Tibetan orography decreases LPS frequency and spatial extent, while increasing total monsoon precipitation.
JOURNAL OF CLIMATE
(2023)
Article
Geography, Physical
Ruoyuan Qiu, Linhao Fang, Peizong Lv, Fujie Jiang, Xinzhi Zhang, Xiaoyu Zhang, Pengyuan Zhang, Lei Zhu, Shengbao Shi
Summary: Through stratigraphy, chemostratigraphy, and molecular compound analyses of the Kuqa River section in the Tarim Basin, north-western China, we uncover the evolutionary processes of wildfires in the Early Jurassic. Our findings suggest that wildfires are influenced by both paleoclimate change and astronomical factors, with periodically enhanced wildfires corresponding to high eccentricity cycles. These results are important for understanding the impact of wildfires on Earth systems and the interactions between the atmosphere and biosphere.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Multidisciplinary Sciences
Danielle Fraser, Amelia Villasenor, Aniko B. Toth, Meghan A. Balk, Jussi T. Eronen, W. Andrew Barr, A. K. Behrensmeyer, Matt Davis, Andrew Du, J. Tyler Faith, Gary R. Graves, Nicholas J. Gotelli, Advait M. Jukar, Cindy Looy, Brian J. McGill, Joshua H. Miller, Silvia Pineda-Munoz, Richard Potts, Alex B. Shupinski, Laura C. Soul, S. Kathleen Lyons
Summary: This study investigates the biotic homogenization of North American mammalian assemblages and finds that it has been occurring for thousands of years. The phenomenon is most pronounced among mammals larger than 1 kg. Additionally, human impacts on ecosystems can be traced back to approximately 10,000 years ago.
NATURE COMMUNICATIONS
(2022)
Article
Geography, Physical
Thibaut Cardinal, Carole Petit, Yann Rolland, Laurence Audin, Stephane Schwartz, Pierre G. Valla, Swann Zerathe, Regis Braucher
Summary: This study aims to distinguish the contributions of short-term climatic fluctuations and long-term tectonic forcing to Late-Quaternary fluvial incision by measuring Cl-36 concentrations in Jurassic limestones. The results show that fluvial incision is influenced by both climatic fluctuations and resistant lithologies. Gorges connected to glaciers exhibit a significant response to climatic variations, while disconnected gorges are in agreement with long-term tectonic forcing.
Article
Geosciences, Multidisciplinary
Bai Su, Jimin Sun, Chun-Sheng Jin
Summary: By investigating a lacustrine sequence from the Lunpola Basin, this study reveals that the South Asian monsoon intensified and advanced northward to the central Tibetan Plateau at least by 25.5 million years ago. This finding is crucial for understanding the formation and evolution of the Asian monsoon system.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Meteorology & Atmospheric Sciences
Lekshmi Mudra, T. P. Sabin, R. Krishnan, Francesco S. R. Pausata, Olivier Marti, Pascale Braconnot
Summary: The summer monsoons in the Northern Hemisphere were stronger during the mid-Holocene, resulting in a northward shift of the Intertropical Convergence Zone (ITCZ) over Africa, India, and East Asia compared to the pre-industrial climate. This study shows that orbital forcing and ocean surface conditions played a significant role in intensifying the monsoons and shifting the ITCZ. The combined impact of orbital forcing and sea surface temperature (SST) led to significant changes in monsoon rainfall and the position of the ITCZ.
Article
Geochemistry & Geophysics
Ren Wei, Mingsong Li, Rui Zhang, Yongyun Hu, James G. Ogg, Guoyong Liu, He Huang, Xiangwu He, Shuai Yuan, Qifan Lin, Zhijun Jin
Summary: This study provides evidence for the involvement of continental aquifers in the global water cycle during icehouse episodes at the million-year scale. The analysis of lacustrine sedimentary sequences and paleoclimate simulations reveals the influence of groundwater aquifers on long-period obliquity cycles and sea-level fluctuations during the late Paleozoic ice age.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geography, Physical
Martin H. Trauth
Summary: Spectral analysis is a time-series analysis technique that breaks signals down into linear combinations of harmonic components. It gained popularity in palaeoclimatology since the early 1980s due to the availability of long time series of past climates and the development of new methods. This paper reviews important spectral analysis methods for palaeoclimate time series, discussing their prerequisites, advantages, and disadvantages, while also providing an overview of suitable software and computer code.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Meteorology & Atmospheric Sciences
Tianjiao Ma, Wen Chen, Shangfeng Chen, Chaim I. Garfinkel, Shuoyi Ding, Lei Song, Zhibo Li, Yulian Tang, Jingliang Huangfu, Hainan Gong, Wei Zhao
Summary: This study investigates the impacts of ENSO on climate anomalies over East Asia in early and late winter. The results show that ENSO is associated with a wave train that originates from the tropical Indian Ocean and affects East Asia. The formation of this wave train is closely related to precipitation anomalies in the tropical eastern Indian Ocean and western Pacific.
JOURNAL OF CLIMATE
(2022)
Article
Multidisciplinary Sciences
Kyung Eun Lee, Steven C. Clemens, Yoshimi Kubota, Axel Timmermann, Ann Holbourn, Sang-Wook Yeh, Si Woong Bae, Tae Wook Ko
Summary: New research on changes in sea surface temperatures in the East China Sea over the past 400,000 years reveals phase differences between annual mean and summer temperatures, especially during interglacial periods. Climate changes are influenced by seasonal insolation variations and CO2 concentrations, with temperature shifts during glacial terminations showing significant differences between summer and winter temperatures. This study highlights the importance of considering proxy seasonality and seasonal climate variability when estimating climate sensitivity.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Philipp Kirschner, Manolo F. Perez, Eliska Zaveska, Isabel Sanmartin, Laurent Marquer, Birgit C. Schlick-Steiner, Nadir Alvarez, Florian M. Steiner, Peter Schoenswetter
Summary: Quaternary climatic oscillations had a significant impact on European biogeography, particularly on the Eurasian steppe biome. Through the analysis of plant and insect species, consistent demographic responses of expansion during cold stages and contraction during warm stages were observed. Climate was identified as a driving force underlying genetic variance patterns at the biome level.
NATURE COMMUNICATIONS
(2022)