A filtering / extracting scheme for various timescale processes in short range climate model out-put is established by using the scale scattering method. And the climatological meanings as well as the impor-tance of t...A filtering / extracting scheme for various timescale processes in short range climate model out-put is established by using the scale scattering method. And the climatological meanings as well as the impor-tance of the filtered series are discussed. In the latter part of work, the effectiveness of the filtering method and the performance of the prediction model are analyzed through a real case.展开更多
不同草地生态系统碳/水循环对极端气候响应及其机制存在差异。本研究基于生物地球化学循环模型Biome-BGCMuSo(BGC with Multilayer Soil Module)结合涡度相关数据,通过敏感性分析和参数优化,探究了不同草地类型碳/水通量差异及其对极端...不同草地生态系统碳/水循环对极端气候响应及其机制存在差异。本研究基于生物地球化学循环模型Biome-BGCMuSo(BGC with Multilayer Soil Module)结合涡度相关数据,通过敏感性分析和参数优化,探究了不同草地类型碳/水通量差异及其对极端气候的响应。结果表明,碳通量模拟对植被光合生理及碳分配参数敏感,水通量对叶片、根系参数敏感,且不同草地类型存在差异,优化高敏感参数可显著提升碳通量模拟精度,但水通量模拟仍有待进一步提高。生长季热浪期间,3种草地仍为碳汇,温性荒漠草原和山地草甸日间碳汇分别减弱28.7%和29.4%;极端降雨提升了3种草地的碳/水通量;干旱事件使温性荒漠草原碳汇增强62.5%,山地草甸碳汇减弱16.3%。本研究揭示了干旱-半干旱区草地碳/水循环对极端气候的不同响应机制,为预测气候变化下草地生态过程演变提供了科学依据。展开更多
文摘A filtering / extracting scheme for various timescale processes in short range climate model out-put is established by using the scale scattering method. And the climatological meanings as well as the impor-tance of the filtered series are discussed. In the latter part of work, the effectiveness of the filtering method and the performance of the prediction model are analyzed through a real case.
文摘不同草地生态系统碳/水循环对极端气候响应及其机制存在差异。本研究基于生物地球化学循环模型Biome-BGCMuSo(BGC with Multilayer Soil Module)结合涡度相关数据,通过敏感性分析和参数优化,探究了不同草地类型碳/水通量差异及其对极端气候的响应。结果表明,碳通量模拟对植被光合生理及碳分配参数敏感,水通量对叶片、根系参数敏感,且不同草地类型存在差异,优化高敏感参数可显著提升碳通量模拟精度,但水通量模拟仍有待进一步提高。生长季热浪期间,3种草地仍为碳汇,温性荒漠草原和山地草甸日间碳汇分别减弱28.7%和29.4%;极端降雨提升了3种草地的碳/水通量;干旱事件使温性荒漠草原碳汇增强62.5%,山地草甸碳汇减弱16.3%。本研究揭示了干旱-半干旱区草地碳/水循环对极端气候的不同响应机制,为预测气候变化下草地生态过程演变提供了科学依据。
