Relevance of methodological choices for accounting of land use change carbon fluxes
Relevance of methodological choices for accounting of land use change carbon fluxes
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DOI：
10.1002/2014gb004997
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发表时间：
2015-08-01
影响因子：
5.2
通讯作者：
Pongratz, Julia
中科院分区：
文献类型：
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作者：
Hansis, Eberhard;Davis, Steven J.;Pongratz, Julia
核算土地利用和土地覆被变化（LULCC）的碳通量通常需要从如何将通量归因于区域和LULCC活动的多种选项中进行选择。应用新开发的空间清晰的簿记模型BLUE（土地利用排放簿记），我们量化LULCC通量，并通过一系列不同的核算方法将其归因于土地利用活动和国家。我们以2008-2012年土地利用排放量为例，展示了类似《京都议定书》的“承诺”会计期的结果。我们评估了不同核算方法的影响：（1）碳储量的时间演变，（2）期初碳储量的状态，（3）期初碳通量的时间归属，（4）期初之前发生的LULCC通量的处理。我们发现，方法的选择导致不同的归因定义的碳通量的估计有很大的不同。
Accounting for carbon fluxes from land use and land cover change (LULCC) generally requires choosing from multiple options of how to attribute the fluxes to regions and to LULCC activities. Applying a newly developed and spatially explicit bookkeeping model BLUE (bookkeeping of land use emissions), we quantify LULCC fluxes and attribute them to land use activities and countries by a range of different accounting methods. We present results with respect to a Kyoto Protocol-like "commitment" accounting period, using land use emissions of 2008-2012 as an example scenario. We assess the effect of accounting methods that vary (1) the temporal evolution of carbon stocks, (2) the state of the carbon stocks at the beginning of the period, (3) the temporal attribution of carbon fluxes during the period, and (4) treatment of LULCC fluxes that occurred prior to the beginning of the period. We show that the methodological choices result in grossly different estimates of carbon fluxes for the different attribution definitions.