...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Soil carbon model alternatives for ECHAM5/JSBACH climate model: Evaluation and impacts on global carbon cycle estimates
【24h】

Soil carbon model alternatives for ECHAM5/JSBACH climate model: Evaluation and impacts on global carbon cycle estimates

机译：ECHAM5 / JSBACH气候模型的土壤碳模型替代品：评估及其对全球碳循环估算的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The response of soil organic carbon to climate change might lead to significant feedbacks affecting global warming. This response can be studied by coupled climate-carbon cycle models but so far the description of soil organic carbon cycle in these models has been quite simple. In this work we used the coupled climate-carbon cycle model ECHAM5/JSBACH (European Center/Hamburg Model 5/Jena Scheme for Biosphere-Atmosphere Coupling in Hamburg) with two different soil carbon modules, namely (1) the original soil carbon model of JSBACH called CBALANCE and (2) a new soil carbon model Yasso07, to study the interaction between climate variability and soil organic carbon. Equivalent ECHAM5/JSBACH simulations were conducted using both soil carbon models, with freely varying atmospheric CO_2 for the last 30 years (1977–2006). In this study, anthropogenic CO_2 emissions and ocean carbon cycle were excluded. The new model formulation produced soil carbon stock estimates that were much closer to measured values. It also captured better the seasonal cycle of the direct CO_2 exchange measurements at the three grassland sites considered (RMS error reduced by 12%), while for the five forest sites also analyzed, the results were ambiguous and the RMS error was 12% larger for Yasso07 than for CBALANCE. As a response to climatic changes, Yasso07 showed greater release of soil carbon to the atmosphere than the original model formulation during the years 1977–2006. This emphasizes the need for better understanding the processes affecting soil carbon stocks and their turnover rates to predict the climatic feedbacks.
机译：土壤有机碳对气候变化的反应可能导致影响全球变暖的重要反馈。可以通过耦合的气候-碳循环模型研究这种响应，但是到目前为止，这些模型中对土壤有机碳循环的描述非常简单。在这项工作中，我们将气候碳循环模型ECHAM5 / JSBACH（欧洲中心/汉堡模型5 /耶拿方案用于汉堡的生物圈-大气耦合）与两个不同的土壤碳模块一起使用，即（1）原始的土壤碳模型。 JSBACH称CBALANCE和（2）一种新的土壤碳模型Yasso07，以研究气候变异性与土壤有机碳之间的相互作用。使用这两种土壤碳模型进行了等效的ECHAM5 / JSBACH模拟，并且在过去30年（1977-2006年）中使用了自由变化的大气CO_2。在这项研究中，排除了人为的CO_2排放和海洋碳循环。新的模型公式得出的土壤碳储量估算值非常接近测量值。它也更好地捕获了所考虑的三个草原站点的直接CO_2交换测量的季节性周期（RMS误差降低了12％），而对于同样分析的五个森林站点，结果是模棱两可的，RMS误差大12％ Yasso07比CBALANCE好。作为对气候变化的一种响应，Yasso07在1977-2006年期间显示出比原始模型配方更大的土壤碳向大气中的释放。这强调需要更好地了解影响土壤碳储量的过程及其周转率，以预测气候反馈。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号