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Intensified aridity...
Intensified aridity over the Indo-Pacific Warm Pool controlled by ice-sheet expansion during the Last Glacial Maximum
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- Xiong, Zhifang (författare)
- Pilot National Laboratory for Marine Science and Technology, Qingdao,Chinese Ministry of Natural Resources
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- Zhai, Bin (författare)
- Qingdao Institute of Marine Geology
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- Algeo, Thomas J. (författare)
- China University of Geosciences,University of Cincinnati
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- Lu, Zhengyao (författare)
- Lund University,Lunds universitet,MERGE: ModElling the Regional and Global Earth system,Centrum för miljö- och klimatvetenskap (CEC),Naturvetenskapliga fakulteten,Institutionen för naturgeografi och ekosystemvetenskap,Centre for Environmental and Climate Science (CEC),Faculty of Science,Dept of Physical Geography and Ecosystem Science
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- Li, Tiegang (författare)
- Pilot National Laboratory for Marine Science and Technology, Qingdao,Chinese Ministry of Natural Resources
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- Meyer, Hanno (författare)
- Alfred-Wegener Institute, Helmholtz Center for Polar and Marine Research, Bremerhaven
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- Jiang, Fuqing (författare)
- Institute of Oceanology, Chinese Academy of Sciences,Pilot National Laboratory for Marine Science and Technology, Qingdao
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- Zhang, Peng (författare)
- Northwest University (China)
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- Qin, Bingbin (författare)
- Chinese Ministry of Natural Resources
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- Gong, Xun (författare)
- China University of Geosciences
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- Wang, Zhenyan (författare)
- Institute of Oceanology, Chinese Academy of Sciences
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- Jia, Qi (författare)
- Chinese Ministry of Natural Resources
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(creator_code:org_t)
- Elsevier BV, 2022
- 2022
- Engelska.
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Ingår i: Global and Planetary Change. - : Elsevier BV. - 0921-8181. ; 217
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The magnitude, direction and cause of precipitation changes across the Indo-Pacific Warm Pool (IPWP) during the Last Glacial Maximum (LGM) remain elusive. In particular, it is still inconclusive whether tropical or extra-tropical factors controlled such precipitation changes. Determining the spatio-temporal distribution of precipitation in the IPWP during the LGM is a valid strategy to address this issue, but the existing precipitation records are dominantly from maritime continents and marginal seas, with few data from pelagic oceans. In order to fill this gap, we analyzed the oxygen isotopic compositions of single Ethmodiscus rex diatom frustules (δ18OE. rex) from a sediment core (WPD-03) consisting of laminated diatom mats (LDMs) in the eastern Philippine Sea (EPS). δ18OE. rex was controlled mainly by sea-surface salinity variation and, thus, can reflect open-ocean precipitation changes across the IPWP. Our precipitation proxy records, in combination with existing published data, reveal spatial patterns of precipitation change that indicate overall drying across the IPWP during the LGM. Based on a comparison of paleoclimatic records with modeling results, we propose that extra-tropical factors (ice-sheet size) controlled precipitation variability in the IPWP during the LGM through a combination of zonal shifts of ENSO and meridional migration of the ITCZ. Strong aridity during the LGM prevented formation of a subsurface barrier layer and, hence, allowed accessing of sufficient nutrients to surface waters, stimulating blooms of E. rex and subsequent formation of LDMs in the IPWP. These findings suggest an important role for high-latitude climate in the tropical hydrological cycle during the LGM.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Nyckelord
- Diatom blooms
- High-latitude forcing
- Model simulation
- Sea-surface salinity
- Tropical hydroclimate
- Tropical West Pacific
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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Xiong, Zhifang
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Zhai, Bin
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Algeo, Thomas J.
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Lu, Zhengyao
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Li, Tiegang
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Meyer, Hanno
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visa fler...
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Jiang, Fuqing
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Zhang, Peng
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Qin, Bingbin
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Gong, Xun
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Wang, Zhenyan
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Jia, Qi
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visa färre...
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