气候变化领域集成服务门户(CCPortal): Continental-scale soil carbon composition and vulnerability modulated by regional environmental controls

CCPortal

DOI	10.1038/s41561-019-0373-z
	Continental-scale soil carbon composition and vulnerability modulated by regional environmental controls
	Viscarra Rossel R.A.; Lee J.; Behrens T.; Luo Z.; Baldock J.; Richards A.
发表日期	2019
ISSN	17520894
EISSN	1752-0908
卷号	12 期号:7 页码:547-+
英文摘要	Soil organic carbon (C) is an essential component of the global C cycle. Processes that control its composition and dynamics over large scales are not well understood. Thus, our understanding of C cycling is incomplete, which makes it difficult to predict C gains and losses due to changes in climate, land use and management. Here we show that controls on the composition of organic C, the particulate, humus and resistant fractions, and the potential vulnerability of C to decomposition across Australia are distinct, scale-dependent and variable. We used machine-learning with 5,721 topsoil measurements to show that, continentally, the climate, soil properties (for example, total nitrogen and pH) and elevation are dominant controls. However, we found that such general assessments disregard underlying region-specific controls that affect the distribution of the organic C fractions and vulnerability. This can lead to misinterpretations that prejudice our understanding of soil C processes and dynamics. Regionally, climate is mediated through interactions with soil properties, mineralogy and topography. In some regions, climate is uninfluential. These results highlight the need for regional assessments of soil C dynamics and more local parameterization of biogeochemical and Earth system models. Our analysis propounds the development of region-specific strategies for effective C management and climate change mitigation. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
WOS研究方向	Geology
scopus关键词	biogeochemistry; humus; parameterization; soil carbon; soil organic matter; topography; vulnerability
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/99433
作者单位	School of Molecular & Life Sciences, Faculty of Science & Engineering, Curtin University, Perth, WA, Australia; CSIRO Land & Water, Canberra, ACT, Australia; Cluster of Excellence ‘Machine Learning: New Perspectives for Science’, Eberhard Karls University Tübingen, Tübingen, Germany; CSIRO Agriculture & Food, Canberra, ACT, Australia; CSIRO Agriculture & Food, Glen Osmond, SA, Australia; CSIRO Land & Water, Winnellie, NT, Australia
推荐引用方式 GB/T 7714	Viscarra Rossel R.A.,Lee J.,Behrens T.,et al. Continental-scale soil carbon composition and vulnerability modulated by regional environmental controls[J],2019,12(7):547-+.
APA	Viscarra Rossel R.A.,Lee J.,Behrens T.,Luo Z.,Baldock J.,&Richards A..(2019).Continental-scale soil carbon composition and vulnerability modulated by regional environmental controls.Nature Geoscience,12(7),547-+.
MLA	Viscarra Rossel R.A.,et al."Continental-scale soil carbon composition and vulnerability modulated by regional environmental controls".Nature Geoscience 12.7(2019):547-+.