首页> 外文会议>International Conference on Regional Carbon Budgets; 20060816-18; Beijing(CN) >Spatial patterns of carbon residence times and sequestration capacity in terrestrial ecosystems of the conterminous USA
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Spatial patterns of carbon residence times and sequestration capacity in terrestrial ecosystems of the conterminous USA

机译:美国本土陆地生态系统中碳停留时间和固存能力的空间格局

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To model carbon (C) sequestration and its spatial pattern, three key parameters need to be quantified: (1) canopy carbon influx; (2) carbon residence time in an ecosystem; and (3) initial values of pool sizes. While spatial distributions of canopy carbon influx have been extensively studied, spatial patterns of carbon residence times have not been carefully characterized. In this study, we conducted an inverse analysis to estimate the carbon residence times in ecosystems of the conterminous US from 12 data sets. The inverse analysis was based on a process-based Terrestrial ECOsystem Regional (TECOR) model and used the genetic algorithm for optimal parameter estimation. The inverted residence times and increase trends of net primary production (NPP) were then fed into a forward modeling analysis to map spatial patterns of carbon sequestration capacity. Our analysis estimated that the mean residence time for the whole conterminous US is 46 years with a range from 10 to 150 years. We estimated that the whole conterminous USA approximately sequesters 0.26 Pg C yr~(-1).
机译:为了模拟碳固存及其空间格局,需要量化三个关键参数:(1)冠层碳涌入; (2)碳在生态系统中的停留时间; (3)池大小的初始值。虽然已经广泛研究了冠层碳流入量的空间分布,但尚未仔细表征碳停留时间的空间模式。在这项研究中,我们进行了反分析,从12个数据集中估算了美国本土生态系统中的碳停留时间。逆分析基于基于过程的陆地生态系统区域(TECOR)模型,并使用遗传算法进行最佳参数估计。然后将倒置的停留时间和净初级生产(NPP)的增长趋势输入正向建模分析,以绘制碳固存能力的空间格局。我们的分析估计,整个美国本土的平均居住时间为46年,范围为10到150年。我们估计整个美国大约螯合了0.26 Pg C yr〜(-1)。

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