气候变化领域集成服务门户(CCPortal): Including Stable Carbon Isotopes to Evaluate the Dynamics of Soil Carbon in the Land-Surface Model ORCHIDEE

CCPortal

DOI	10.1029/2018MS001392
	Including Stable Carbon Isotopes to Evaluate the Dynamics of Soil Carbon in the Land-Surface Model ORCHIDEE
	Camino-Serrano M.; Tifafi M.; Balesdent J.; Hatté C.; Peñuelas J.; Cornu S.; Guenet B.
发表日期	2019
ISSN	19422466
起始页码	3650
结束页码	3669
卷号	11 期号:11
英文摘要	Soil organic carbon (SOC) is a crucial component of the terrestrial carbon cycle and its turnover time in models is a key source of uncertainty. Studies have highlighted the utility of δ13C measurements for benchmarking SOC turnover in global models. We used 13C as a tracer within a vertically discretized soil module of a land-surface model, Organising Carbon and Hydrology In Dynamic Ecosystems- Soil Organic Matter (ORCHIDEE-SOM). Our new module represents some of the processes that have been hypothesized to lead to a 13C enrichment with soil depth as follows: 1) the Suess effect and CO2 fertilization, 2) the relative 13C enrichment of roots compared to leaves, and 3) 13C discrimination associated with microbial activity. We tested if the upgraded soil module was able to reproduce the vertical profile of δ13C within the soil column at two temperate sites and the short-term change in the isotopic signal of soil after a shift in C3/C4 vegetation. We ran the model over Europe to test its performance at larger scale. The model was able to simulate a shift in the isotopic signal due to short-term changes in vegetation cover from C3 to C4; however, it was not able to reproduce the overall vertical profile in soil δ13C, which arises as a combination of short and long-term processes. At the European scale, the model ably reproduced soil CO2 fluxes and total SOC stock. These findings stress the importance of the long-term history of land cover for simulating vertical profiles of δ13C. This new soil module is an emerging tool for the diagnosis and improvement of global SOC models. ©2019. The Authors.
英文关键词	land surface model; soil organic carbon; stable isotopes
语种	英语
scopus关键词	Carbon dioxide; Isotopes; Organic carbon; Surface measurement; Vegetation; Land surface modeling; Long term process; Microbial activities; Soil organic carbon; Soil organic matters; Stable carbon isotopes; Stable isotopes; Terrestrial carbon cycle; Soils; carbon cycle; carbon flux; carbon isotope; environmental modeling; land surface; soil carbon; soil depth; soil organic matter; stable isotope; uncertainty analysis; vegetation cover; Europe
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156829
作者单位	CREAF, Universitat Autònoma de BarcelonaCatalonia, Spain; CSIC, Global Ecology Unit CREAF-CSIC-UABCatalonia, Spain; Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Paris, France; CNRS, IRD, INRA, Coll France, CEREGE, Aix Marseille Univ, Aix en Provence, France
推荐引用方式 GB/T 7714	Camino-Serrano M.,Tifafi M.,Balesdent J.,et al. Including Stable Carbon Isotopes to Evaluate the Dynamics of Soil Carbon in the Land-Surface Model ORCHIDEE[J],2019,11(11).
APA	Camino-Serrano M..,Tifafi M..,Balesdent J..,Hatté C..,Peñuelas J..,...&Guenet B..(2019).Including Stable Carbon Isotopes to Evaluate the Dynamics of Soil Carbon in the Land-Surface Model ORCHIDEE.Journal of Advances in Modeling Earth Systems,11(11).
MLA	Camino-Serrano M.,et al."Including Stable Carbon Isotopes to Evaluate the Dynamics of Soil Carbon in the Land-Surface Model ORCHIDEE".Journal of Advances in Modeling Earth Systems 11.11(2019).