The importance of sub-peat carbon storage as shown by data from Dartmoor, UK
The importance of sub-peat carbon storage as shown by data from Dartmoor, UK
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DOI：
10.1111/sum.12091
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发表时间：
2014-03-01
影响因子：
3.8
通讯作者：
Parry, L.
中科院分区：
文献类型：
--
作者：
Fyfe, R. M.;Coombe, R.;Parry, L.
泥炭地因其一系列生态系统服务而受到高度重视，包括独特的生物多样性、农业用途、娱乐设施、供水、河流流量调节及其储存碳的能力。对联合王国泥炭地储存的碳有各种估计，但仍存在不确定性，特别是泥炭的深度和体积密度。此外，很少有研究考虑到碳审计的全面深度。亚泥炭土在泥炭地碳储量中的重要性已得到公认，但仍然知之甚少，很少被纳入泥炭地碳审计。本研究探讨了碳储量的重要性的基础上，研究毯泥炭达特穆尔，英国，估计泥炭深度在4x 1公里的调查区域，使用探地雷达（GPR），提取43个核心的范围内的泥炭深度，和估计的碳密度的基础上的措施，烧失量和体积密度。探地雷达估计的泥炭深度与岩芯深度的比较显示出良好的一致性，提供了一个详细的了解泥炭深度的分布范围内的调查区域的基础。亚泥炭土的碳密度平均为78和53 kgC/m（3）的覆盖毯泥炭。在整个调查区域，每个岩芯的总碳估计值存在相当大的空间变异性，其值在56.5kgC/m（2）（泥炭和土壤总深度为1.01米）和524 kgC/m（2）（总深度为6.63米）之间。次泥炭土碳占总碳储存量的4%至28%（平均13.5%），较浅的泥炭的值更大。结果表明，一个显着的和以前未计的碳存储在毯泥炭地区，应包括在未来的计算整体碳存储。有人认为，这种储存需要在碳审计中加以考虑。
Peatlands are highly valued for their range of ecosystem services, including distinctive biodiversity, agricultural uses, recreational amenities, water provision, river flow regulation and their capacity to store carbon. There have been a range of estimates of carbon stored in peatlands in the United Kingdom, but uncertainties remain, in particular with regard to depth and bulk density of peat. In addition, very few studies consider the full profile with depth in carbon auditing. The importance of sub-peat soils within peatland carbon stores has been recognized, but remains poorly understood and is included rarely within peatland carbon audits. This study examines the importance of the carbon store based on a study of blanket peat on Dartmoor, UK, by estimating peat depths in a 4x1km survey area using ground penetrating radar (GPR), extraction of 43 cores across a range of peat depth, and estimation of carbon densities based on measures of loss-on-ignition and bulk density. Comparison of GPR estimates of peat depth with core depths shows excellent agreement, to provide the basis for a detailed understanding of the distribution of peat depths within the survey area. Carbon densities of the sub-peat soils are on average 78 and 53kgC/m(3) for the overlying blanket peat. There is considerable spatial variability in the estimates of total carbon from each core across the survey area, with values ranging between 56.5kgC/m(2) (1.01m total depth of peat and soil) and 524kgC/m(2) (6.63m total depth). Sub-peat soil carbon represents between 4 and 28 per cent (mean 13.5) of the total carbon stored, with greater values for shallower peat. The results indicate a significant and previously unaccounted store of carbon within blanket peat regions which should be included in future calculations of overall carbon storage. It is argued that this store needs to be considered in carbon audits.