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Dole effect as a measurement of the low-latitude hydrological cycle over the past 800 ka

The quest of geological proxies to evaluate low-latitude hydrological changes at a planetary scale remains an ongoing issue. The Dole effect is such a potential proxy owing to its global character. We propose a new approach to recalculate the fluctuation of the Dole effect (∆DE*) over the past 800 t...

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Autores principales: Huang, Enqing, Wang, Pinxian, Wang, Yue, Yan, Mi, Tian, Jun, Li, Shihan, Ma, Wentao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7541075/
https://www.ncbi.nlm.nih.gov/pubmed/33028516
http://dx.doi.org/10.1126/sciadv.aba4823
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author Huang, Enqing
Wang, Pinxian
Wang, Yue
Yan, Mi
Tian, Jun
Li, Shihan
Ma, Wentao
author_facet Huang, Enqing
Wang, Pinxian
Wang, Yue
Yan, Mi
Tian, Jun
Li, Shihan
Ma, Wentao
author_sort Huang, Enqing
collection PubMed
description The quest of geological proxies to evaluate low-latitude hydrological changes at a planetary scale remains an ongoing issue. The Dole effect is such a potential proxy owing to its global character. We propose a new approach to recalculate the fluctuation of the Dole effect (∆DE*) over the past 800 thousand years (ka). The ∆DE* calculated this way is dominated by precession cycles alone, with lesser variance in the obliquity bands and almost no variance in the eccentricity bands. Moreover, the ∆DE* is notably correlated with Chinese stalagmite δ(18)O record over the past 640 ka; simulated terrestrial rainfall changes between 30°N and 30°S over the past 300 ka. Our findings highlight the predominant role of the low-latitude hydroclimate in governing the ∆DE* on orbital time scales, while high-latitude climate impacts are negligible. In turn, we argue that the ∆DE* can be used to indicate low-latitude hydrological changes at a global extent.
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spelling pubmed-75410752020-10-20 Dole effect as a measurement of the low-latitude hydrological cycle over the past 800 ka Huang, Enqing Wang, Pinxian Wang, Yue Yan, Mi Tian, Jun Li, Shihan Ma, Wentao Sci Adv Research Articles The quest of geological proxies to evaluate low-latitude hydrological changes at a planetary scale remains an ongoing issue. The Dole effect is such a potential proxy owing to its global character. We propose a new approach to recalculate the fluctuation of the Dole effect (∆DE*) over the past 800 thousand years (ka). The ∆DE* calculated this way is dominated by precession cycles alone, with lesser variance in the obliquity bands and almost no variance in the eccentricity bands. Moreover, the ∆DE* is notably correlated with Chinese stalagmite δ(18)O record over the past 640 ka; simulated terrestrial rainfall changes between 30°N and 30°S over the past 300 ka. Our findings highlight the predominant role of the low-latitude hydroclimate in governing the ∆DE* on orbital time scales, while high-latitude climate impacts are negligible. In turn, we argue that the ∆DE* can be used to indicate low-latitude hydrological changes at a global extent. American Association for the Advancement of Science 2020-10-07 /pmc/articles/PMC7541075/ /pubmed/33028516 http://dx.doi.org/10.1126/sciadv.aba4823 Text en Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/ https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Huang, Enqing
Wang, Pinxian
Wang, Yue
Yan, Mi
Tian, Jun
Li, Shihan
Ma, Wentao
Dole effect as a measurement of the low-latitude hydrological cycle over the past 800 ka
title Dole effect as a measurement of the low-latitude hydrological cycle over the past 800 ka
title_full Dole effect as a measurement of the low-latitude hydrological cycle over the past 800 ka
title_fullStr Dole effect as a measurement of the low-latitude hydrological cycle over the past 800 ka
title_full_unstemmed Dole effect as a measurement of the low-latitude hydrological cycle over the past 800 ka
title_short Dole effect as a measurement of the low-latitude hydrological cycle over the past 800 ka
title_sort dole effect as a measurement of the low-latitude hydrological cycle over the past 800 ka
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7541075/
https://www.ncbi.nlm.nih.gov/pubmed/33028516
http://dx.doi.org/10.1126/sciadv.aba4823
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