RothCUK - a dynamic modelling system for estimating changes in soil C from mineral soils at 1-km resolution in the UK
RothCUK - a dynamic modelling system for estimating changes in soil C from mineral soils at 1-km resolution in the UK
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DOI：
10.1111/j.1475-2743.2006.00028.x
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发表时间：
2006-09-01
影响因子：
3.8
通讯作者：
Brown, T.
中科院分区：
文献类型：
--
作者：
Falloon, P.;Smith, P.;Brown, T.
我们描述了一个集成的数据和模拟系统的开发和应用，该系统用于估计英国(RothCUK)气候、土地利用和土地管理变化引起的矿物土壤的土壤碳(C)通量。开发该系统的目的是改进《联合国气候变化框架公约》(《气候公约》)和《京都议定书》的核算方法，并将土壤特性、土地利用和气候的国家尺度数据集与罗斯柴德碳模型(RothC)相结合。作为该系统的一个应用实例，给出了1990-2000年土地利用变化(LUC)引起的土壤碳通量的初步估计。RothCUK显示，从1990年到2000年，LUC是二氧化碳的净来源，尽管RothC估计值(6488 Kt C)小于目前用于计算英国国家温室气体清单中LUC造成的C通量的单指数模型(SEM)方法的估计值(平均值：9412 kt C)。根据之前的研究，我们估计的+/-50%-100%的不确定范围似乎是可信的。与扫描电子显微镜的结果一致，RothCUK认为，LUC对土壤碳通量的最大贡献是草地向耕地的转化。结果之间的差异可能归因于两个模型以及在进行计算时使用的假设和基础数据的差异。RothCUK系统提供了一种强大的方法来估计土壤碳储量的变化，使土壤碳储量变化特别大的地区和管理系统能够以精细的分辨率进行定位。
We describe the development and application of an integrated data and modelling system for estimating soil carbon (C) fluxes from mineral soils caused by changes in climate, land use and land management at 1-km resolution in the UK (RothCUK). The system was developed with the aim of improving methods for United Nations Framework Convention on Climate Change (UNFCCC) and Kyoto Protocol accounting and integrates national scale data sets of soil properties, land use and climate with the Rothamsted carbon model (RothC). A preliminary estimate of soil C fluxes because of land use change (LUC) over the period 1990-2000 is presented as an example application of the system. RothCUK shows LUC to be a net source of CO2 from 1990 to 2000 although the RothC estimate was smaller (6488 kt C) than the estimate from the single exponential model (SEM) method currently used to calculate C fluxes due to LUC for the UK National Greenhouse Gas Inventory (mean: 9412 kt C). Based on previous studies, an uncertainty range in our estimates of +/- 50-100% seems plausible. In agreement with the SEM, RothCUK suggests that the largest single contributor to soil C fluxes from LUC was conversion of grassland to arable land. Differences between the results may be attributed to differences in the two models and the assumptions and underlying data used in making the calculations. The RothCUK system provides a powerful method for estimating changes in soil C stocks, enabling areas and management systems with particularly large changes in soil C stocks to be located at fine resolution.