在国家一级对土壤有机碳的可解释的数据驱动空间预测
Azamat Suleymanov1, Evgeny Abakumov2, Igor Savin3
1Department of Applied Ecology, Saint-Petersburg State University, 199178, Saint-Petersburg, Russia; Laboratory of Soil Science, Ufa Institute of Biology, Ufa Federal Research Centre, Russian Academy of Sciences, 450054, Ufa, Russia.
The Science of the total environment
|December 28, 2025
概括
这项研究使用可解释的机器学习在俄罗斯绘制了土壤有机碳 (SOC) 地图. 北部地区由于有机土壤和泥炭地,受到温度和降水的影响而显示出高的SOC.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 地理空间分析是什么
背景情况:
- 在全球范围内,对土壤有机碳 (SOC) 进行准确的空间建模至关重要.
- 了解SOC分布驱动因素对于碳库存和气候变化缓解至关重要.
研究的目的:
- 在俄罗斯进行全国范围的SOC映射.
- 通过使用Shapley值和地理视觉分析来提高模型的解释性.
- 为了比较随机森林 (RF) 模型,使用不同的协变量和调.
主要方法:
- 使用随机森林 (RF) 模型进行全国范围的SOC映射.
- 应用沙普利值用于模型解释性和地视分析.
- 与不同协变量集和超参数调的射频模型进行比较.
主要成果:
- 最好的射频模型实现了70.03g/kg的RMSE和0.39.2的R2.
- 俄罗斯北部的SOC含量很高,主要是有机土壤和泥炭地.
- 沙普利的分析揭示了SOC和生物/无生物变量之间的复杂关系,温度和降水是关键驱动因素.
结论:
- 可解释机器学习,特别是Shapley值,对于理解SOC驱动程序非常有价值.
- 这项研究为俄罗斯的土壤碳库存提供了基线.
- 温度,降水,陆地表面温度变化和海拔高度等环境因素显著影响SOC积累.
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