| 贡嘎山冷杉林土壤CO_2释放的模拟研究 |
| |
| 引用本文： | 鲁旭阳,范继辉,霍常富,程根伟.贡嘎山冷杉林土壤CO_2释放的模拟研究[J].浙江林业科技,2009,29(6). |
| |
| 作者姓名： | 鲁旭阳 范继辉 霍常富 程根伟 |
| |
| 作者单位： | 中国科学院成都山地灾害与环境研究所,四川,成都,610041;中国科学院贡嘎山高山生态系统观测试验站,四川,泸定,626102 |
| |
| 基金项目： | 国家重点基础研究发展规划(973计划) |
| |
| 摘 要： | 利用贡嘎山冷杉林1998年和1999年土壤CO_2通量对生物地球化学循环模型Forest-DNDC进行校准和验证,通过调整温度和湿度对土壤根呼吸影响的计算公式和对模型参数的本土化,提高了模拟值与真实值之间的吻合程度,尤其是提高了冬季土壤CO_2释放模拟的准确性.校准后使土壤CO_2日释放量模拟结果的平均误差((-e))和相对平均误差((-e)')分别下降了3.81 kg/hm~2和13.49%,绝对平均误差(M)和相对绝对平均误差(M')也同时降低;模型效率的Nash-Sutcliffe系数(Me)和冷模拟(利用默认参数)相比,也由0.651提高到0.683.模型验证结果表明,冷杉林土壤CO_2释放通量模拟值大体上能够与实际观测值的季节变化和日变化保持一致,在释放的量上也与实际观测值相当.
|
| 关 键 词： | CO_2通量 模型校准 冷杉 |
Simulation of CO_2 Emission from Soil of Abies fabri Forest at Gongga Mountian |
| |
| LU Xu-yang,FAN Ji-hui,HUO Chang-fu,CHENG Gen-wei.Simulation of CO_2 Emission from Soil of Abies fabri Forest at Gongga Mountian[J].Journal of Zhejiang Forestry Science and Technology,2009,29(6). |
| |
| Authors: | LU Xu-yang FAN Ji-hui HUO Chang-fu CHENG Gen-wei |
| |
| Abstract: | Calibration and validation for Forest-DNDC was carried out by the fluxes of soil CO_2 emission determined in 1998 and 1999 from Abies fabri forest at Gongga Mountain. Simulated fluxes of soil CO_2 emission calibrated by changing temperature and humidity in the formula fitted well with values by measurement, especially that in winter. The mean error and the mean relative error of calibrated simulation of soil CO_2 emission decreased 3.81kg/hm~2 and by 13.49%. than that of cold simulation as well as the mean and relative mean absolute error. The Nash-Suteliffe index of model efficiency increased from 0.651 to 0.683. Validation of the model demonstrated that simulated CO_2 emission of daily and seasonal change was similar to measured one. |
| |
| Keywords: | Forest-DNDC CO_2 flux Forest-DNDC calibration Abies fabri |
| 本文献已被 万方数据 等数据库收录！ |
|
