气候变化领域集成服务门户(CCPortal): Minimising soil organic carbon erosion by wind is critical for land degradation neutrality

CCPortal

DOI	10.1016/j.envsci.2018.12.020
	Minimising soil organic carbon erosion by wind is critical for land degradation neutrality
	Chappell A.; Webb N.P.; Leys J.F.; Waters C.M.; Orgill S.; Eyres M.J.
发表日期	2019
ISSN	14629011
起始页码	43
结束页码	52
卷号	93
英文摘要	The Land Degradation-Neutrality (LDN) framework of the United Nations Convention to Combat Desertification (UNCCD) is underpinned by three complementary interactive indicators (metrics: vegetation cover, net primary productivity; NPP and soil organic carbon; SOC) as proxies for change in land-based natural capital. The LDN framework assumes that SOC changes slowly, primarily by decomposition and respiration of CO2 to the atmosphere. However, there is growing evidence that soil erosion by wind, water and tillage also reduces SOC stocks rapidly after land use and cover change. Here, we modify a physically-based wind erosion sediment transport model to better represent the vegetation cover (using land surface aerodynamic roughness; that is the plant canopy coverage, stone cover, soil aggregates, etc. that protects the soil surface from wind erosion) and quantify the contribution of wind erosion to global SOC erosion (2001–2016). We use the wind erosion model to identify global dryland regions where SOC erosion by wind may be a significant problem for achieving LDN. Selected sites in global drylands also show SOC erosion by wind accelerating over time. Without targeting and reducing SOC erosion, management practices in these regions will fail to sequester SOC and reduce land degradation. We describe the interrelated nature of the LDN indicators, the importance of including SOC erosion by wind erosion and how by explicitly accounting for wind erosion processes, we can better represent the physical effects of changing land cover on land degradation. Our results for Earth's drylands show that modelling SOC stock reduction by wind erosion is better than using land cover and SOC independently. Furthermore, emphasising the role of wind erosion in UNCCD and Intergovernmental Panel on Climate Change (IPCC) reporting will better support LDN and climate change mitigation and adaptation globally. © 2018
英文关键词	Land cover; Land degradation neutrality; Sequestration; Soil organic carbon; Wind erosion
scopus关键词	carbon dioxide; organic carbon; adaptive environmental management; Article; canopy; climate change; decomposition; degradation; land use; model; priority journal; soil erosion; surface property; tillage; vegetation; wind erosion
来源期刊	Environmental Science and Policy
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176214
作者单位	School of Earth and Ocean Sciences, Cardiff University, Wales, CF10 3AT, United Kingdom; USDA-ARS Jornada Experimental Range, Las Cruces, NM, United States; Knowledge Services Team, Science Division, NSW Environment and Heritage, Gunnedah, NSW 2380, Australia; NSW Department of Primary Industries, PMB 19, Trangie, NSW 2823, Australia; NSW Department of Primary Industries, Pine Gully Road, Wagga Wagga, NSW 2650, Australia; Field Systems (Australia), Stirling, SA 5152, Australia
推荐引用方式 GB/T 7714	Chappell A.,Webb N.P.,Leys J.F.,et al. Minimising soil organic carbon erosion by wind is critical for land degradation neutrality[J],2019,93.
APA	Chappell A.,Webb N.P.,Leys J.F.,Waters C.M.,Orgill S.,&Eyres M.J..(2019).Minimising soil organic carbon erosion by wind is critical for land degradation neutrality.Environmental Science and Policy,93.
MLA	Chappell A.,et al."Minimising soil organic carbon erosion by wind is critical for land degradation neutrality".Environmental Science and Policy 93(2019).