Dataset Information

A last deglacial climate dataset comprising ice core data, marine data, and stalagmite data.

ABSTRACT: 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 ?¹⁸O records derived from Greenlandic ice cores, 2 ?D records and 7 ?¹⁸O records derived from Antarctic ice cores, 32 U^K' ₃₇ records and 26 Mg/Ca records derived from marine deposits, and 17 ?¹⁸O records derived from cave stalagmites were collected and collated. General and statistical characteristics of these 88 proxy records are showed here. All of the data are stored in separate Microsoft Excel spreadsheets that are available for researchers.

SUBMITTER: Liu Z

PROVIDER: S-EPMC6249515 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature

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A last deglacial climate dataset comprising ice core data, marine data, and stalagmite data.

Liu Zhi Z Huang Shaopeng S Jin Zhangdong Z

Data in brief 20181105

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 δ18O records derived from Greenlandic ice cores, 2 δD records and 7 δ18</s ...[more]

PMID: 30505913

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Project description:Tropical climate is rapidly changing, but the effects of these changes on the geosphere are unknown, despite a likelihood of climatically-induced changes on weathering and erosion. The lack of long, continuous paleo-records prevents an examination of terrestrial responses to climate change with sufficient detail to answer questions about how systems behaved in the past and may alter in the future. We use high-resolution records of pollen, clay mineralogy, and particle size from a drill core from Lake Malawi, southeast Africa, to examine atmosphere-biosphere-geosphere interactions during the last deglaciation (∼ 18-9 ka), a period of dramatic temperature and hydrologic changes. The results demonstrate that climatic controls on Lake Malawi vegetation are critically important to weathering processes and erosion patterns during the deglaciation. At 18 ka, afromontane forests dominated but were progressively replaced by tropical seasonal forest, as summer rainfall increased. Despite indication of decreased rainfall, drought-intolerant forest persisted through the Younger Dryas (YD) resulting from a shorter dry season. Following the YD, an intensified summer monsoon and increased rainfall seasonality were coeval with forest decline and expansion of drought-tolerant miombo woodland. Clay minerals closely track the vegetation record, with high ratios of kaolinite to smectite (K/S) indicating heavy leaching when forest predominates, despite variable rainfall. In the early Holocene, when rainfall and temperature increased (effective moisture remained low), open woodlands expansion resulted in decreased K/S, suggesting a reduction in chemical weathering intensity. Terrigenous sediment mass accumulation rates also increased, suggesting critical linkages among open vegetation and erosion during intervals of enhanced summer rainfall. This study shows a strong, direct influence of vegetation composition on weathering intensity in the tropics. As climate change will likely impact this interplay between the biosphere and geosphere, tropical landscape change could lead to deleterious effects on soil and water quality in regions with little infrastructure for mitigation.

Dataset Information

A last deglacial climate dataset comprising ice core data, marine data, and stalagmite data.

Publications

A last deglacial climate dataset comprising ice core data, marine data, and stalagmite data.

Similar Datasets

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