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| Liu, Zhi; Huang, Shaopeng; Jin, Zhangdong. |
| In this data article, a dataset of paleoclimatic records ranging from 22 to 9 thousand years before present is reported, which is related to the research article entitled "Breakpoint lead-lag analysis of the last deglacial climate change and atmospheric CO2 concentration on global and hemispheric scales" published in the journal of Quaternary International by Liu et al. (2018). In the dataset, 4 delta O-18 records derived from Greenlandic ice cores, 2 delta D records and 7 delta O-18 records derived from Antarctic ice cores, 32 U-37(K') records and 26 Mg/Ca records derived from marine deposits, and 17 delta O-18 records derived from cave stalagmites were collected and collated. General and statistical characteristics of these 88 proxy records are showed... |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00495/60687/65440.pdf |
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| Chen, Pujiao; Yu, Jimin; Jin, Zhangdong. |
| The deep ocean is thought to have played a crucial role in modulating atmospheric CO2 changes, and thus reconstructions of deep ocean conditions can place important constraints on the past global carbon cycle. Some previous studies suggested that foraminiferal U/Ca could be used to infer seawater carbonate chemistry changes, but others showed complications from diagenesis and temperature. A recent downcore study suggested that foraminiferal U/Mn may be used for sedimentary redoxconditions, but no core-top work has been done to investigate factors affecting U/Mn. We investigate controlling factors on U/Ca and U/Mn in two benthic foraminiferal species from 120 global core-tops and three Atlantic sediment cores. Our core-top data reveal no significant... |
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| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00420/53185/55029.pdf |
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