[734] - Inverse determination of heterotrophic soil respiration response to temperature and water content under field conditions

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Bauer, J., Weihermüller, L., Huisman, J. A., Herbst, M., Graf, A., Sequaris, J., Vereecken, H., 2010. Inverse determination of heterotrophic soil respiration response to temperature and water content under field conditions. Biogeochemistry, 108 (1-3), 119 - 134. DOI: 10.1007/s10533-011-9583-1.
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Title(s):Main Title: Inverse determination of heterotrophic soil respiration response to temperature and water content under field conditions
Description(s):Abstract: Heterotrophic soil respiration is an important flux within the global carbon cycle. Exact knowledge of the response functions for soil temperature and soil water content is crucial for a reliable prediction of soil carbon turnover. The classical approach for the in situ determination of the temperature response (Q10 or activation energy) from a linear regression between log-transformed CO2 fluxes and temperatures measured in a definite soil depth has been criticised for neglecting confounding factors such as spatial and temporal changes in soil water content and soil organic matter. To overcome these limitations, we determined temperature and soil water content response equations of heterotrophic soil respiration by means of inverse parameter estimation using a 1-dimensional CO2 transport and carbon turnover model. For the validation of the model we used an annual dataset of measured soil temperatures, soil water contents, and CO2 fluxes. Carbon pools were initialised using measured soil carbon fractions. Analysis of different formulations of temperature response resulted in estimated response factors that hardly deviated over the entire range of soil water contents and for temperatures < 25°C. For higher temperatures the temperature response was highly uncertain due to the infrequent occurrence of soil temperatures > 25°C. Inverse parameter estimation using numerical models is a promising tool for a reliable determination of the temperature and soil water content response of heterotrophic soil respiration.
Identifier(s):DOI: 10.1007/s10533-011-9583-1
Responsible Party
Creator(s):Author: Jana Bauer
Author: Lutz Weihermüller
Author: Johan A. Huisman
Author: Michael Herbst
Author: Alexander Graf
Author: Jean-Marie Sequaris
Author: Harry Vereecken
TR32 Topic:Soil
Subject(s):CRC/TR32 Keywords: Soil Respiration, Heterotrophic Respiration, Water Content, Inverse Parameter Estimation
File Details
File Name:2010_Bauer_Biogeochemistry.pdf
Data Type:Text
Size(s):16 Pages
File Size:676 kB (0.66 MB)
Date(s):Date Accepted: 2011-02-11
Issued: 2011-03-08
Mime Type:application/pdf
Data Format:PDF
Download Permission:OnlyTR32
General Access and Use Conditions:For internal use only
Access Limitations:For internal use only
Licence:TR32DB Data policy agreement
Measurement Region:RurCatchment
Measurement Location:--RurCatchment--
Specific Informations - Publication
Article Type:Journal
Number Of Pages:16
Page Range:119 - 134
Metadata Details
Metadata Creator:Johann Alexander (Sander) Huisman
Metadata Created:2013-12-03
Metadata Last Updated:2013-12-03
Funding Phase:2
Metadata Language:English
Metadata Version:V40
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