The 173‐kyr Obliquity Cycle Pacing the Asian Monsoon in the Eastern Chinese Loess Plateau From Late Miocene to Pliocene

Zhang, Rui; Li, Xiaojuan; Yong, Xu; Li, Jianxing; Sun, Lu; Yue, Leping; Pan, Feng; Xian, Feng; Wei, Xiaohao; cao, Yuge

doi:10.1029/2021gl097008

Cited by 10 publications

(28 citation statements)

References 54 publications

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“…However, we need to stress that the inconsistent sampling resolution retrieved from different sections would limit a deeper discussion on the obtained 100-kyr cycle and associated driving factors, and therefore call for more future studies based on highresolution continuous records. Furthermore, the strong power in the 150-200 kyr band recorded in our data (Figure 4B), is likely an indication of obliquity modulation cycle (Hinnov, 2000;Laskar et al, 2004) as found in the late Cenozoic sediments from the Qaidam Basin (Zhang et al, 2021) and the aeolian deposits in the Chinese Loess Plateau (Zhang et al, 2022), or an indication of the ~173-kyr cycle that has been recently discovered in many sedimentary records globally (e.g., Boulila et al, 2018;Huang et al, 2021;Zhang et al, 2022). Such evidence suggests that the identified cycles centered at 150-200 kyr are potential stable cycles concealed in paleoenvironmental records in the central and east Asia, which requires more attention and further investigations.…”

Section: Regional Weathering History and Major Transitionssupporting

confidence: 59%

Trends and Transitions in Silicate Weathering in the Asian Interior (NE Tibet) Since 53 Ma

Yang

Han

et al. 2022

Front. Earth Sci.

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The relationship between silicate weathering, Tibetan Plateau uplift, and global cooling during the Cenozoic provides a valuable case study for understanding the interaction of tectonics and climate. The Tibetan Plateau uplift is considered to have caused Cenozoic cooling via the atmospheric CO2 drawdown by increased silicate weathering. However, this hypothesis has been intensively debated over the past few decades due to the lack of complete silicate weathering records from the continental interior, which can directly track the effects of uplift on weathering. We provide the first complete long (past 53 Myr) continental silicate weathering record from the NE Tibetan Plateau, combined with a comprehensive analysis on its evolution pattern, critical transitions, and associated driving forces. The silicate weathering intensity in NE Tibet is characterized by a long-term Paleogene decrease, modulated by global cooling, and a Neogene increase that may be related to the East Asian summer monsoon (EASM) intensification. Three major system transitions in regional silicate weathering are identified at ∼26–23 Ma, ∼16 Ma and ∼8 Ma, which are linked to enhanced EASM forced primarily by tectonic uplift at these intervals, with some surbordinate influences from global climate at ∼16 Ma. We also capture an intensification of the 100-kyr cycle at ∼16 Ma and ∼8 Ma in the obtained silicate weathering record, which is in coincidence in time with the enhancement of the EASM. This might suggest some contribution of the Antarctic ice sheets on modulating the regional silicate weathering in the NE Tibetan Plateau on a timescale of 105–106 years, through its influences on the EASM as proposed by previous studies.

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Section: Regional Weathering History and Major Transitionssupporting

confidence: 59%

Trends and Transitions in Silicate Weathering in the Asian Interior (NE Tibet) Since 53 Ma

Yang

Han

et al. 2022

Front. Earth Sci.

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“…Obliquity, precession and their modulations have been shown to be important driving forces of the global monsoon system which is sensitive to change in insolation, waxing and waning of ice sheets, and CO 2 concentration (Anwar et al., 2015; Nie, 2018; Nie et al., 2008; Prell & Kutzbach, 1992; Zhang et al., 2022). Various time series, such as MS, δ 18 O, SST, and atmospheric CO 2 levels, display a significant climatic transition at ∼5.3 Ma (Beerling & Royer, 2011; Herbert et al., 2016; Holbourn et al., 2018; Liu et al., 2019; Tian et al., 2008; Figure 9).…”

Section: Discussionmentioning

confidence: 99%

“…To further highlight the expression of the 405 and 100 Kyr eccentricity bands within the LMS and JS records, we applied a two‐channel band‐pass filter with 350–500 and 80–125 Kyr bandwidths, respectively (red curves in Figure 8) after removing the long‐term trend that could be related to tectonic processes in the region (Anwar et al., 2015; Zhang, Kravchinsky, et al., 2021; Zhang et al., 2022). The minima of each 405 Kyr cycle after the filter application between ∼5.3 and 2.5 Ma for both MS curves (Figures 8d and 8e) correlate with the eccentricity maxima (Figure 8c).…”

Section: Discussionmentioning

confidence: 99%

“…The bottom age of the SL section was extensively debated and assigned from the late Miocene at 11 Ma (Xu et al, 2009(Xu et al, , 2012, 8 Ma (Ao et al, 2016(Ao et al, , 2018, to the early Pliocene at 5.2 Ma (Anwar et al, 2015;Zhang et al, 2018Zhang et al, , 2022. Both Ao et al (2016Ao et al ( , 2018 and Xu et al (2012) mistakenly assigned the finding of micromammal Meriones sp.…”

Section: Stratigraphic Correlationsmentioning

confidence: 99%

“…Sun et al., 2019). In earlier records from the late Miocene to Pliocene, some may show unconventional cycles related to the orbital inclination rates of Earth and Saturn, called 173 Kyr metronome for Asian monsoon, which arouses our interest (Zhang et al., 2022). From the analysis of the obliquity solution, both the 173 Kyr and 1.2 Myr obliquity bands are of particular importance, the signal from the second is even stronger than that of the first one (Laskar, 2020).…”

Section: Introductionmentioning

confidence: 99%

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1.2 Myr Band of Earth‐Mars Obliquity Modulation on the Evolution of Cold Late Miocene to Warm Early Pliocene Climate

et al. 2022

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In the late Miocene, terrestrial environments and ecosystems have undergone tremendous changes due to the presumed decline of atmospheric CO 2 between 8 and 6 Ma (Beerling and Royer, 2011;Bolton & stoll, 2013). This period has seen the replacement of large areas of tropical and subtropical forests by deserts (such as Sahara Deserts) and the expansion of C4 grassland (Cerling et al., 1997;Huang et al., 2007;Schuster et al., 2006). The large restructuring of vegetation and landscape coincided with major turnovers in animal communities (Badgley et al., 2008). However, those continental environmental upheavals do not bring direct information on the temperature change during the late Miocene (Herbert et al., 2016). The marine isotope record younger than the middle Miocene is characterized by periodic anomalies of the Antarctic ice volume that have been shown to be probably driven by obliquity in marine sequences from the peri-Antarctic margin (Naish et al., 2009). No clear trend suggests a long-term climatic change during the late Miocene (Lewis et al., 2008;Westerhold et al., 2020;Zachos et al., 2001). Recently, the integration of marine sea-surface temperature (SST) made it possible to estimate the evolution of global temperature during the Miocene (Herbert et al., 2016;LaRiviere et al., 2012). The late Miocene cooling did not lead monotonically to the ice age in the northern hemisphere that prevailed through

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1.2-million-year band of Earth–Mars obliquity modulation on the evolution of cold late Miocene to warm early Pliocene climate

Qin¹,

Zhang²,

Kravchinsky

et al. 2022

Preprint

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The climatic transitions during the Miocene-Pliocene epochs had significant impacts on the worldwide biological diversity and were associated with large turnovers of continental vegetation and fauna. Previous studies have shown that late Miocene cooling and continental aridification which was initiated 7 Ma reversed to warm conditions across the Miocene-Pliocene Boundary ˜5.3 Ma. Here we present detailed orbital pacing of Asian monsoon deposits to constrain further the global climate change during this period. We produce high-resolution magnetic susceptibility records which reveal that the 1.2 Myr obliquity modulation would have been the main driving factor of the cooling and warming that occurred ˜7 Ma and 5.3 Ma, respectively. The Tibetan rise and closures of the Panama and Indonesian seaways enhanced the impact of the 405 kyr eccentricity cycles to an oscillatory climatic state while the Northern Hemisphere glaciations were increasing from 4 to 2.5 Ma.

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The 173‐kyr Obliquity Cycle Pacing the Asian Monsoon in the Eastern Chinese Loess Plateau From Late Miocene to Pliocene

Cited by 10 publications

References 54 publications

Trends and Transitions in Silicate Weathering in the Asian Interior (NE Tibet) Since 53 Ma

Trends and Transitions in Silicate Weathering in the Asian Interior (NE Tibet) Since 53 Ma

1.2 Myr Band of Earth‐Mars Obliquity Modulation on the Evolution of Cold Late Miocene to Warm Early Pliocene Climate

1.2-million-year band of Earth–Mars obliquity modulation on the evolution of cold late Miocene to warm early Pliocene climate

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