Articles | Volume 11, issue 8
https://doi.org/10.5194/cp-11-1067-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/cp-11-1067-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Multiscale monsoon variability during the last two climatic cycles revealed by spectral signals in Chinese loess and speleothem records
Y. Li
CORRESPONDING AUTHOR
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, Shaanxi 710061, China
N. Su
College of Science, Technology and Engineering, James Cook University, Cairns, Queensland 4870, Australia
School of Mathematics and System Science, Shenyang Normal University, Shenyang, Liaoning 110034, China
L. Liang
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, Shaanxi 710061, China
L. Ma
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, Shaanxi 710061, China
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, Shaanxi 710061, China
Y. Sun
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, Shaanxi 710061, China
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This preprint is open for discussion and under review for Climate of the Past (CP).
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In this study, we use the distribution of soil bacterial membrane lipids stored on the Chinese Loess Plateau (CLP) to quantitatively reconstruct variations in precipitation amount over the past 130 kyr. The precipitation record shows orbital- and millennial-scale variations and varies at precession and obliquity scale. The application of this precipitation proxy across the CLP indicates a more pronounced spatial gradient during glacials, when the western CLP experiences more arid conditions.
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Our high-resolution loess Ca/Ti record displays millennial monsoon oscillations that persist over the last 650 kyr. Wavelet results indicate the ice volume and GHG co-modulation at the 100 kyr band and GHG and local insolation forcing at the precession band for the magnitude of millennial monsoon variability of loess Ca/Ti. The inferred mechanism calls on dynamic linkages to variability in AMOC. At the precession band, combined effects of GHG and insolation lead to increased extreme rainfall.
Zhisheng An, Peizhen Zhang, Hendrik Vogel, Yougui Song, John Dodson, Thomas Wiersberg, Xijie Feng, Huayu Lu, Li Ai, and Youbin Sun
Sci. Dril., 28, 63–73, https://doi.org/10.5194/sd-28-63-2020, https://doi.org/10.5194/sd-28-63-2020, 2020
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The East Asian summer monsoon and winter monsoon are anticorrelated on a centennial timescale during 16–1 ka. The centennial monsoon variability is connected to changes of both solar activity and North Atlantic cooling events during the Early Holocene. Then, North Atlantic cooling became the major forcing of events during the Late Holocene. This work presents the great challenge and potential to understand the response of the monsoon system to global climate changes in the past and the future.
Haijiao Liu, Yan Yan, Hong Chang, Hongyun Chen, Lianji Liang, Xingxing Liu, Xiaoke Qiang, and Youbin Sun
Atmos. Chem. Phys., 19, 731–745, https://doi.org/10.5194/acp-19-731-2019, https://doi.org/10.5194/acp-19-731-2019, 2019
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The characteristics of urban dust aerosols are of substantial sociopolitical and economic concern. We find that atmospheric dustfall in Xi'an exhibits significant seasonal variations, with a maximum in spring and minimum in autumn. The atmospheric dustfall of Xi'an mainly originates from natural dust sources in East Asia and local anthropogenic sources. Distal natural dust and local anthropogenic dust have different magnetic, morphological, and elemental characteristics.
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Subject: Atmospheric Dynamics | Archive: Terrestrial Archives | Timescale: Millenial/D-O
Reconstruction of warm-season temperatures in central Europe during the past 60 000 years from lacustrine branched glycerol dialkyl glycerol tetraethers (brGDGTs)
Major dust events in Europe during marine isotope stage 5 (130–74 ka): a climatic interpretation of the "markers"
Interhemispheric gradient of atmospheric radiocarbon reveals natural variability of Southern Ocean winds
North Atlantic abrupt climatic events of the last glacial period recorded in Ukrainian loess deposits
Paul D. Zander, Daniel Böhl, Frank Sirocko, Alexandra Auderset, Gerald H. Haug, and Alfredo Martínez-García
Clim. Past, 20, 841–864, https://doi.org/10.5194/cp-20-841-2024, https://doi.org/10.5194/cp-20-841-2024, 2024
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Bacterial lipids (branched glycerol dialkyl glycerol tetraethers; brGDGTs) extracted from lake sediments were used to reconstruct warm-season temperatures in central Europe during the past 60 kyr. Modern samples were used to test and correct for bias related to varying sources of brGDGTs. The temperature reconstruction is significantly correlated with other temperature reconstructions but features less millennial-scale variability, which is attributed to the seasonal signal of the proxy.
D.-D. Rousseau, M. Ghil, G. Kukla, A. Sima, P. Antoine, M. Fuchs, C. Hatté, F. Lagroix, M. Debret, and O. Moine
Clim. Past, 9, 2213–2230, https://doi.org/10.5194/cp-9-2213-2013, https://doi.org/10.5194/cp-9-2213-2013, 2013
K. B. Rodgers, S. E. Mikaloff-Fletcher, D. Bianchi, C. Beaulieu, E. D. Galbraith, A. Gnanadesikan, A. G. Hogg, D. Iudicone, B. R. Lintner, T. Naegler, P. J. Reimer, J. L. Sarmiento, and R. D. Slater
Clim. Past, 7, 1123–1138, https://doi.org/10.5194/cp-7-1123-2011, https://doi.org/10.5194/cp-7-1123-2011, 2011
D.-D. Rousseau, P. Antoine, N. Gerasimenko, A. Sima, M. Fuchs, C. Hatté, O. Moine, and L. Zoeller
Clim. Past, 7, 221–234, https://doi.org/10.5194/cp-7-221-2011, https://doi.org/10.5194/cp-7-221-2011, 2011
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Short summary
Multiscale signals were decomposed from Chinese loess and speleothem records over the last 260 kyr. We found great glacial and orbital impacts on the loess grain size changes and dominant precession forcing in the speleothem δ18O variability. The millennial components are evident in the loess and speleothem proxies with variances of 13 and 17%. Close matches of millennial monsoon events between these two proxies indicate similar driving force linked to high-latitude Northern Hemisphere climate.
Multiscale signals were decomposed from Chinese loess and speleothem records over the last 260...