气候变化领域集成服务门户(CCPortal): Large Differences in Global and Regional Total Soil Carbon Stock Estimates Based on SoilGrids, HWSD, and NCSCD: Intercomparison and Evaluation Based on Field Data From USA, England, Wales, and France

CCPortal

DOI	10.1002/2017GB005678
	Large Differences in Global and Regional Total Soil Carbon Stock Estimates Based on SoilGrids, HWSD, and NCSCD: Intercomparison and Evaluation Based on Field Data From USA, England, Wales, and France
	Tifafi M.; Guenet B.; Hatté C.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	42
结束页码	56
卷号	32 期号:1
英文摘要	Soils are the major component of the terrestrial ecosystem and the largest organic carbon reservoir on Earth. However, they are a nonrenewable natural resource and especially reactive to human disturbance and climate change. Despite its importance, soil carbon dynamics is an important source of uncertainty for future climate predictions and there is a growing need for more precise information to better understand the mechanisms controlling soil carbon dynamics and better constrain Earth system models. The aim of our work is to compare soil organic carbon stocks given by different global and regional databases that already exist. We calculated global and regional soil carbon stocks at 1 m depth given by three existing databases (SoilGrids, the Harmonized World Soil Database, and the Northern Circumpolar Soil Carbon Database). We observed that total stocks predicted by each product differ greatly: it is estimated to be around 3,400 Pg by SoilGrids and is about 2,500 Pg according to Harmonized World Soil Database. This difference is marked in particular for boreal regions where differences can be related to high disparities in soil organic carbon concentration. Differences in other regions are more limited and may be related to differences in bulk density estimates. Finally, evaluation of the three data sets versus ground truth data shows that (i) there is a significant difference in spatial patterns between ground truth data and compared data sets and that (ii) data sets underestimate by more than 40% the soil organic carbon stock compared to field data. ©2017. American Geophysical Union. All Rights Reserved.
英文关键词	bulk density; data sets; organic carbon; soil; uncertainties
语种	英语
scopus关键词	anthropogenic effect; bulk density; carbon cycle; climate change; comparative study; data set; database; estimation method; field method; organic carbon; soil carbon; soil organic matter; terrestrial ecosystem; uncertainty analysis; England; France; United Kingdom; United States; Wales
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129871
作者单位	Laboratoire des Sciences du Climat et de l'Environnement/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, France
推荐引用方式 GB/T 7714	Tifafi M.,Guenet B.,Hatté C.. Large Differences in Global and Regional Total Soil Carbon Stock Estimates Based on SoilGrids, HWSD, and NCSCD: Intercomparison and Evaluation Based on Field Data From USA, England, Wales, and France[J],2018,32(1).
APA	Tifafi M.,Guenet B.,&Hatté C..(2018).Large Differences in Global and Regional Total Soil Carbon Stock Estimates Based on SoilGrids, HWSD, and NCSCD: Intercomparison and Evaluation Based on Field Data From USA, England, Wales, and France.Global Biogeochemical Cycles,32(1).
MLA	Tifafi M.,et al."Large Differences in Global and Regional Total Soil Carbon Stock Estimates Based on SoilGrids, HWSD, and NCSCD: Intercomparison and Evaluation Based on Field Data From USA, England, Wales, and France".Global Biogeochemical Cycles 32.1(2018).