Results 1 to 10 of about 9,888 (286)

Extending the astronomical (polarity) time scale into the Miocene [PDF]

Earth and Planetary Science Letters, 1995
An astronomical time scale is presented for the late Miocene based on the correlation of characteristic sedimentary cycle patterns in marine sections in the Mediterranean to the 65”N summer insolation curve of La90 [ 1,2] with present-day values for the dynamical ellipticity of the Earth and tidd dissipation by the moon.
F J Hilgen, Wout Krijgsman, C G Langereis   +2 more
exaly   +5 more sources

Astronomical time scale for the Middle Oxfordian to Late Kimmeridgian in the Swiss and French Jura Mountains [PDF]

Swiss Journal of Geosciences, 2007
Detailed investigation of facies and sedimentary structures reveals that, during the Middle Oxfordian to Late Kimmeridgian, the shallow carbonate platform of the Swiss and French Jura Mountains recorded high-frequency sea-level fluctuations quite faithfully.
André Strasser, Strasser André
exaly   +5 more sources

Time-Scale and Time-Frequency Analyses of Irregularly Sampled Astronomical Time Series [PDF]

EURASIP Journal on Advances in Signal Processing, 2005
We evaluate the quality of spectral restoration in the case of irregular sampled signals in astronomy. We study in details a time-scale method leading to a global wavelet spectrum comparable to the Fourier period, and a time-frequency matching pursuit ...
S. Roques, C. Thiebaut
doaj   +3 more sources

Astronomical calibration of the middle Cambrian in Baltica: global carbon cycle synchronization and climate dynamics [PDF]

Nature Communications
The Alum Shale Formation of Baltica preserves one of the most continuous and fossil-rich records for the Cambrian Period. Thus, the Alum Shale is a key sedimentary archive for refining global chronostratigraphy, reconstructing carbon cycle perturbations,
Valentin JAMART, Damien PAS, Linda A. HINNOV, Jorge E. SPANGENBERG, Thierry ADATTE, Arne T. NIELSEN, Niels H. SCHOVSBO, Nicolas THIBAULT, Michiel ARTS, Allison C. DALEY   +9 more
doaj   +3 more sources

Astronomical time scale of the Turonian constrained by multiple paleoclimate proxies

Geoscience Frontiers, 2020
Abstract One of the clocks that record the Earth history is (quasi-) periodic astronomical cycles. These cycles influence the climate that can be ultimately stored in sedimentary rocks. By cracking these (quasi-) periodic sedimentation signals, high resolution astronomical time scale (ATS) can be obtained.
Mingsong Li
exaly   +2 more sources

A novel chronostratigraphic framework for the Aptian–Albian paleoclimate events [PDF]

Scientific Reports
The Aptian–Albian interval was marked by paleoclimatic changes encompassing volcanic events and monsoonal activity of which the precise timing were not well-defined.
João M. F. Ramos, Jairo F. Savian, Daniel R. Franco, Milene F. Figueiredo, Carolina G. Leandro, Rodolfo Coccioni, Fabrizio Frontalini, Nicola Casadei, Hironao Matsumoto, Leonardo R. Tedeschi, Luigi Jovane, Ricardo I. F. Trindade   +11 more
doaj   +2 more sources

Early Cretaceous Terrestrial Milankovitch Cycles in the Luanping Basin, North China and Time Constraints on Early Stage Jehol Biota Evolution

Frontiers in Earth Science, 2020
This research analyzes the cyclostratigraphy of the lacustrine Dabeigou Formation (DBG) of early Jehol Biota age (∼130–135 Ma) in the Luanping Basin, northern China.
Wei Liu, Wei Liu, Huaichun Wu, Huaichun Wu, Linda A. Hinnov, Dangpeng Xi, Huaiyu He, Shihong Zhang, Tianshui Yang   +8 more
doaj   +3 more sources

StarWhisper Telescope: an AI framework for automating end-to-end astronomical observations [PDF]

Communications Engineering
The exponential growth of large-scale telescope arrays has boosted time-domain astronomy development but introduced operational bottlenecks, including labor-intensive observation planning, data processing, and real-time decision-making.
Cunshi Wang, Yu Zhang, Yuyang Li, Xinjie Hu, Yiming Mao, Xunhao Chen, Pengliang Du, Rui Wang, Ying Wu, Hang Yang, Yansong Li, Beichuan Wang, Haiyang Mu, Xiaohan Chen, Shunxuan He, Hao Mo, Liyue Zhang, Lin Du, Yunning Zhao, Jianfeng Tian, Liang Ge, Yongna Mao, Shengming Li, Zheng Wang, Xiaomeng Lu, Jinhang Zou, Yang Huang, Ningchen Sun, Jie Zheng, Min He, Yu Bai, Junjie Jin, Hong Wu, Jifeng Liu   +33 more
doaj   +2 more sources

Testing Astronomical Solutions With Geological Data for the Latest Cretaceous: An Astronomically Tuned Time Scale

Paleoceanography and Paleoclimatology
Abstract Astronomical solutions form the backbone of accurate dating for geology and paleoclimate studies. Beyond 50 Ma, however, the chaos inherent in the solar system makes it impossible to calculate a unique astronomical solution.
Ilja J Kocken, Richard E Zeebe
exaly   +2 more sources

Astronomical forcing in Lopingian coal-bearing cycles: a case study of Bijie area in northwestern Guizhou

矿业科学学报, 2022
To systematically study the sedimentary cycles and their astronomical forcing in the Lopingian coal-bearing series in Bijie area, northwestern Guizhou, the GR logging data from four boreholes in this area were analyzed and tested by using time series ...
Gao Xiangyu, Shao Longyi, Wang Xuetian, Hua Fanghui, Lu Jing   +4 more
doaj   +1 more source