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为了探索在全球气候变化背景下多年冻土区碳储量现状,通过野外实地勘探和室内实验,对黑河上游俄博岭多年冻土区地貌特征及不同海拔活动层内的碳储量进行考察和估算.结果表明:黑河上游俄博岭冰缘现象显著,土壤季节冻融过程活跃,且活动层中碳储量丰富.在研究区约2.5×106 m2的范围内,活动层平均厚度约为1.1m,活动层土壤有机质平均含量约为72.1%,碳储量估算约为1.57Mt C.活动层不同深度处有机质含量呈现不同的变化规律.随着活动层深度增加,土壤有机质的含量逐渐降低,在多年冻土上限附近有机质含量较高.另外,活动层有机质含量随着海拔和土壤含水量的不同而变化,同时多年冻土区微地形和地质条件也对有机质含量具有重要的影响.
In order to explore the status quo of carbon storage in permafrost regions in the context of global climate change, field investigation and laboratory experiments were conducted to investigate and estimate the topography of the Permian permafrost regions and the carbon storage in different altitudes in the upper Heihe River. The results show that the ice-rim of the Lubuge region is significant in the upper reaches of the Heihe River, the soil freeze-thaw season is active, and the carbon storage is abundant in the active layer.In the study area of about 2.5 × 106 m2, the average thickness of the active layer is about 1.1m, The average content of soil organic matter was about 72.1% and the estimated carbon storage was about 1.57Mt. The content of organic matter in different depths of active layer showed different variation rules. With the depth of active layer increasing, the content of soil organic matter gradually decreased. In addition, the organic matter content of the active layer varies with elevation and soil moisture content, and micro-topography and geological conditions in the permafrost region also have an important impact on the organic matter content.