Central Asian modulation of Northern Hemisphere moisture transfer over the Late Cenozoic
Prud’homme C. Scardia G. Vonhof H. Guinoiseau D. Nigmatova S. Fiebig J. Gerdes A. Janssen R. Fitzsimmons K.E.
December 2021Nature Publishing Group
Communications Earth and Environment
2021#2Issue 1
Earth’s climatic evolution over the last 5 million years is primarily understood from the perspective of marine mechanisms, however, the role of terrestrial feedbacks remains largely unexplored. Here we reconstruct the last 5 million years of soil moisture variability in Central Asia using paleomagnetism data and isotope geochemistry of an 80 m-thick sedimentary succession at Charyn Canyon, Kazakhstan. We identify a long-term trend of increasing aridification throughout the period, along with shorter-term variability related to the interaction between mid-latitude westerlies and the Siberian high-pressure system. This record highlights the long-term contribution of mid-latitude Eurasian terrestrial systems to the modulation of moisture transfer into the Northern Hemisphere oceans and back onto land via westerly air flow. The response of Earth-surface dynamics to Plio-Pleistocene climatic change in Central Asia likely generated terrestrial feedbacks affecting ocean and atmospheric circulation. This missing terrestrial link elucidates the significance of land-water feedbacks for long-term global climate.
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Research Group for Terrestrial Palaeoclimates, Max-Planck-Institute for Chemistry, Mainz, Germany
Instituto de Geociências e Ciências Exatas, Universidade Estadual Paulista, Rio Claro, Brazil
Climate Geochemistry, Max-Planck-Institute for Chemistry, Mainz, Germany
Université de Paris, Institut de Physique du Globe de Paris, Paris, France
Aix Marseille University, CNRS, IRD, INRAE, Coll France, CEREGE, Aix-en-Provence, France
Institute of Geological Sciences K. Satpaeva, Almaty, Kazakhstan
Institute of Geosciences, Goethe‐University Frankfurt, Frankfurt am Main, Germany
Frankfurt Element and Isotope Research Center, Goethe‐University Frankfurt, Frankfurt am Main, Germany
Research Group for Terrestrial Palaeoclimates
Instituto de Geociências e Ciências Exatas
Climate Geochemistry
Université de Paris
Aix Marseille University
Institute of Geological Sciences K. Satpaeva
Institute of Geosciences
Frankfurt Element and Isotope Research Center
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