Abstract

An approach was developed and tested to spatial assessment of soil organic carbon stock in uniform groups of mineral and organic (litters, peat deposits, and peaty horizons of semihydromorphic soils) soil horizons. Estimation algorithm allowed us to utilize various datasets with different scales, both spatially and attributive sparse data of different veracities, which complemented each other. A series of maps of different accuracies and scales, including coarse-scale maps covering the entire country and more detailed maps for regions well covered with field measurements. Using these maps, the total organic carbon amount and its distribution over different pools in the 30-cm topsoil layer for the entire Russia and for three administrative regions of European Russia (more detailed) were estimated. The soil organic carbon pool of mineral soil horizons was estimated at 101 Gt C, which corresponded to 62% of the total organic carbon stock within the layer of 0–30 cm; 38% is allocated in organic horizons, including 9% in litter horizons (in rapidly decomposing organic pool) and 29% in peat deposit and peaty horizons of semihydromorphic soils. The organic carbon stocks in the 30-cm soil layer gradually increase from the north to the south: from 87 t/ha in Vologda oblast to 91 t/ha in Moscow oblast and 109 t/ha in Rostov oblast. The share of organic horizons in the total carbon stock decreases from the north to the south. Information on the size and structure of organic carbon pools may facilitate more reliable assessments of soil tolerance toward natural and anthropogenic changes and the development of regionally specific land use strategies.

中文翻译：

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俄罗斯联邦土壤有机碳空间评估的综合方法

摘要

开发并测试了一种方法，用于对矿物质和有机物（凋落物，泥炭沉积物和半水状土壤的泥炭层）的统一组中的土壤有机碳储量进行空间评估。估计算法使我们能够利用具有不同比例的各种数据集，在空间上和属性上具有不同准确性的稀疏数据相互补充。一系列不同精度和比例的地图，包括覆盖整个国家的粗比例图和针对覆盖了实地测量值的区域的更详细的图。使用这些地图，估算了整个俄罗斯和欧洲俄罗斯三个行政区域（更详细）的30厘米表土层中不同池中的总有机碳量及其分布。矿物土壤层的土壤有机碳库估计为101 Gt C，相当于0-30 cm层内有机碳总储量的62％。38％用于有机层，其中9％用于凋落物层（快速分解的有机池），29％用于半水状土壤的泥炭沉积和泥炭土层。30厘米土壤层中的有机碳储量从北向南逐渐增加：从沃洛格达州的87吨/公顷增加到莫斯科州的91吨/公顷和罗斯托夫州的109吨/公顷。从北到南，有机层在总碳储量中所占的比例下降。有关有机碳库的大小和结构的信息可能有助于更可靠地评估土壤对自然和人为变化的耐受力，以及制定区域特定的土地利用策略。