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本研究以三江平原为研究区,利用遥感信息提取技术获得研究区水稻田的空间分布信息,并结合DNDC模型对稻田温室气体甲烷的季节排放进行了模拟和估算。结果显示2006年研究区的水稻田面积为1.428×106hm2,每季向大气净排放的甲烷-碳总量为0.424-0.513Tg(1Tg=1012g),并且空间上具有较大的排放差异。研究表明,集成遥感信息技术和生态模型模拟方法,将为编制稻田温室气体排放清单和制定减排策略提供潜在的手段。 更多还原

【Abstract】 The Sanjiang Plain (SJP) of the Northeast China was selected as study area. Remote sensing (RS) information abstracting technology was applied to acquire spatial distribution of rice paddies, and a process-based biogeochemical model, the Denitrification and Decomposition (DNDC) model, was used to simulate and estimate the seasonal methane (CH4) emissions from rice paddies. Results showed that a total of 1.428×106 ha rice paddies cover the entire SJP released 0.424-0.513 Tg CH4-C to the atmospher... 更多还原