Biome reconstruction on the Tibetan Plateau since the Last Glacial Maximum using a machine learning method

Biome reconstruction on the Tibetan Plateau since the Last Glacial Maximum using a machine learning method


This dataset is the biome change data of the Tibetan Plateau since the last glacial maximum which was reconstructed by using a new method. Firstly, a random forest algorithm was applied to establish a pollen-biome classification model for reconstructing past vegetation changes of the Tibetan Plateau, and 1802 modern pollen assemblages from 17 vegetation zones in and around the Tibetan Plateau were used as the training set for the model development. The random forest model showed a reliable performance (accuracy > 76%) in predicting modern biomes from modern pollen assemblages based on a comparison with the observed biomes. Moreover, the random forest model had a significantly higher accuracy than the traditional biomization method. Then, the newly established random forest model is applied to the paleovegetation reconstruction of 51 fossil pollen sequences of the Tibetan Plateau. New age-depth models were developed for these fossil pollen records using the Bayesian method, and all fossil pollen records were linearly interpolated to 500-year time slices. Finally, the spatiotemporal changes of biomes on the Tibetan plateau over the past 22,000 years at an interval of 500 years were reconstructed by using the random forest model. This dataset can provide evidence for understanding the past variation of alpine vegetation and its mechanism; provide the basis for studying the impact of past climate change on vegetation on the Tibetan Plateau; and provide boundary conditions for climate simulation.


File naming and required software

The data is stored in Excel format, which contains the geographic information of the fossil sites and the reconstructed vegetation data of them over the past 22,000 years at 500-year intervals.


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Cite as:

Qin, F., Zhao, Y., Cao, X. (2022). Biome reconstruction on the Tibetan Plateau since the Last Glacial Maximum using a machine learning method. National Tibetan Plateau Data Center, DOI: 10.11888/Paleoenv.tpdc.272003. CSTR: 18406.11.Paleoenv.tpdc.272003. (Download the reference: RIS | Bibtex )

Related Literatures:

1. Qin, F., Zhao, Y., Cao, X.Y. (2022). Biome reconstruction on the Tibetan Plateau since the Last Glacial Maximum using a machine learning method. Science China Earth Sciences 65, 518-535.( View Details | Bibtex)

Using this data, the data citation is required to be referenced and the related literatures are suggested to be cited.


Support Program

the Strategic Priority Research Program of the Chinese Academy of Sciences (No:XDA20070101)

Estimates of the relative pollen productivity on the Tibetan Plateau and quantitative reconstruction of its Holocene vegetation succession (No:42071114)

Land surface dynamics of Tibetan Plateau and its impact on the variability of East Asian monsoon at orbital scale (No:41690113)

Copyright & License

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Example of acknowledgement statement is included below: The data set is provided by National Tibetan Plateau Data Center (http://data.tpdc.ac.cn).


License: This work is licensed under an Attribution 4.0 International (CC BY 4.0)


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Keywords
Geographic coverage
East: 104.67 West: 72.50
South: 25.99 North: 39.83
Details
  • Temporal resolution: 100 year < x < 1000 year
  • Spatial resolution: --
  • File size: 0.02 MB
  • Views: 4,371
  • Downloads: 29
  • Access: Requestable
  • Temporal coverage: over the past 22,000 years
  • Updated time: 2022-03-01
Contacts
: QIN Feng    ZHAO Yan   CAO Xianyong  

Distributor: National Tibetan Plateau Data Center

Email: data@itpcas.ac.cn

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