Stalagmite data sets of Magou cave in Henan
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DOI
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Key words
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Stalagmite, Magou cave
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Related data
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Monsoon precipitation in East China shows distinct spatial distribution and its variability is closely linkedwith the changes of the East Asian summer monsoon (EASM). Located in the transition zone between thesouthern subtropical humid climate and the northern warm temperate semi-humid climate, central Chinais a core region for recognizing and understanding the spatio-temporal variability of the EASM. Using Useries dating and stable isotope analysis on five stalagmites (MG-1, MG-2, MG-7, MG-40 and MG-64)from Magou Cave, Henan Province, Central China, we construct a high-resolution and precisely datedcomposite stalagmite δ18O time series covering most of the Holocene. This composite record revealsvariations in precipitation δ18O between 11.7 and 1.1 ka BP with average resolution of ～4 yrs. TheMagou composite record demonstrates that EASM intensity dominates long-term changes in precipitationδ18O, which generally follows the northern hemisphere summer insolation (NHSI) trend. Both, EnsembleEmpirical Mode Decomposition (EEMD) and wavelet filtering analyses real that the amplitudes of longterm (100-500 and 500-3000 yrs) components were slightly reduced between 8.5 and 4.9 ka BP, implyinga weakened influence of climatic forcings on centennial and even millennial timescales during this warmperiod. Variance on 1-30-yr timescales is relatively low and ascribed to sampling resolution. Fourteenweak EASM intervals, including the 8.2 ka event, were identified within the period corresponding broadlywith the Holocene Megathermal. Since no cold excursions other than the 8.2 ka event are found in theGreenland ice core records, we tentatively propose that oscillations in tropical sea surface temperature(SST) likely play an important role in steering other weak monsoon events. Aligning the Magou compositerecord and other moisture records with archaeological records from the study region, it seems thatclimate change influenced both the spatial distribution and agricultural practices of ancient cultures.However, overall moderate climatic changes in this region, most likely characterized by shifts betweensubtropical humid climate and warm temperate semi-humid climate, supported a generally consecutivedevelopment of ancient cultures without major hiatuses.
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Data description
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a.Description of Intellectual Property Rights When using a dataset, please refer to the following documents in the article：
CaiYanjun*, Cheng Xing, Ma Le, Mao Ruixue, Breitenbach, S.F., Zhang, Haiwei, Xue, Gang, Cheng Hai, Edwards, R.L. and An, Zhisheng, 2021. Holocene variability of East Asian summer monsoon as viewed from the speleothem δ18O records in central China. Earth and Planetary Science Letters, 558, p.116758
b. The data labels refer to the following specifications：
Data sources refer to the following specifications： East Asian Paleoenvironmental Science Database (http://paleodata.ieecas.cn/index.aspx)，National Earth System Science Data Center, National Science & Technology Infrastructure of China (http://www.geodata.cn).
Acknowledgments refer to the following specifications:
Acknowledgement for the data support from “East Asian Paleoenvironmental Science Database (http://paleodata.ieecas.cn/index.aspx)，National Earth System Science Data Center, National Science & Technology Infrastructure of China. (http://www.geodata.cn)”.
c. Contacts Name:
Cai Yanjun et al. & Data processing group
Company: Institute of Earth Environment, Chinese Academy of Sciences
Tel: 029-62336213
Email: zhaohl@ieecas.cn
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Dataset format
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excel
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Data type
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High-resolution geological and biological records/Stalagmite/Stalagmite
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Data sources
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authors supply
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Enclosure
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[download]
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Related pictures
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 Contact card |
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Name：Dr. Zhao |
E-mail：zhaohl@ieecas.cn |
| Company：IEECAS |
Telephone：029-62336213 |