中国陆地生态系统净第一性生产力和碳储量：综合与模拟

Based on lots of field biomass measurements of various vegetation types (forests, grasslands, desert, and alpine vegetation) in China, net primary productivity (NPP) and carbon storage (CS) were synthesized and calculated. The relationships between climates and spatial patterns of NPP and CS were also anylyzed. Vegetation patterns at different spatial scales, such as the whole country, the Tibetan Plateau and the Northeast China Transect (NECT) were simulated. Meanwhile, NPP and CS in the live vegetation and in soils under current climates were also modeled both using equilibrium and dynamic vegetation models. The predicted and measured NPP and CS were compared numerically. Using outputs derived from the Hadley Center General Circulation Model (GCM, HadCM2), the impacts of climate change and CO2 enrichment on NPP and CS were predicted in the future 100 years. A prelimary simulation of carbon cycle and its relations to climate variability during the early and mid-Holocene was made by a Dynamic Global Vegetation Model (LPJ-DGVM) and the Fast Ocean-Atmosphere Model (FOAM). This study can be used to clarify the background of NPP and CS in terrestrial ecosystems of China, to validate vegetation models and to obtain a future scenario of NPP and CS at country scale.

综合分析我国陆地生态系统的实测生物量，推算净第一性生产力和碳储量，经升维和插值获得现状NPP和碳储量；利用模型模拟NPP和碳储量，预测未来气候变化和CO2增加后的不同时危约肮ト率乐衅谟肽┐问⒈诘腘PP和碳储量；进行实测数据和过去、现在、未来不同时段模拟和碳储量的综合比较。以次分析碳源和碳汇问题，及其对全球碳循环的贡献。