GYIG OpenIR  > 环境地球化学国家重点实验室
A moisture function of soil heterotrophic respiration that incorporates microscale processes
Zhifeng Yan; Ben Bond-Lamberty; Katherine E. Todd-Brown; Vanessa L. Bailey; SiLiang Li; CongQiang Liu; Chongxuan Liu
2018
Source PublicationNATURE COMMUNICATIONS
Volume9Issue:1Pages:1-10
Abstract

Soil heterotrophic respiration (HR) is an important source of soil-to-atmosphere CO2 flux, but its response to changes in soil water content (theta) is poorly understood. Earth system models commonly use empirical moisture functions to describe the HR-theta relationship, introducing significant uncertainty in predicting CO2 flux from soils. Generalized, mechanistic models that address this uncertainty are thus urgently needed. Here we derive, test, and calibrate a novel moisture function, f(m), that encapsulates primary physicochemical and biological processes controlling soil HR. We validated f(m) using simulation results and published experimental data, and established the quantitative relationships between parameters of f(m) and measurable soil properties, which enables f(m) to predict the HR-theta relationships for different soils across spatial scales. The f(m) function predicted comparable HR-theta relationships with laboratory and field measurements, and may reduce the uncertainty in predicting the response of soil organic carbon stocks to climate change compared with the empirical moisture functions currently used in Earth system models.

Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8815
Collection环境地球化学国家重点实验室
Affiliation1.Institute of Surface-Earth System Science, Tianjin University, 300072 Tianjin, China
2.Pacific Northwest National Laboratory-University of Maryland Joint Global Climate Change Research Institute, College Park, MD 20740, USA
3.Pacific Northwest National Laboratory, Richland, WA 99354, USA
4.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, 550081 Guiyang, China
5.Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, 518055 Shenzhen, Guangdong, China
Recommended Citation
GB/T 7714
Zhifeng Yan,Ben Bond-Lamberty,Katherine E. Todd-Brown,et al. A moisture function of soil heterotrophic respiration that incorporates microscale processes[J]. NATURE COMMUNICATIONS,2018,9(1):1-10.
APA Zhifeng Yan.,Ben Bond-Lamberty.,Katherine E. Todd-Brown.,Vanessa L. Bailey.,SiLiang Li.,...&Chongxuan Liu.(2018).A moisture function of soil heterotrophic respiration that incorporates microscale processes.NATURE COMMUNICATIONS,9(1),1-10.
MLA Zhifeng Yan,et al."A moisture function of soil heterotrophic respiration that incorporates microscale processes".NATURE COMMUNICATIONS 9.1(2018):1-10.
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