[651] - Measurement depth effects on the apparent temperature sensitivity of soil respiration in field studies

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Graf, A., Weihermüller, L., Huisman, J. A., Herbst, M., Bauer, J., Vereecken, H., 2008. Measurement depth effects on the apparent temperature sensitivity of soil respiration in field studies. Biogeosciences, 5, 1175 - 1188. DOI: 10.5194/bg-5-1175-2008.
Title(s):Main Title: Measurement depth effects on the apparent temperature sensitivity of soil respiration in field studies
Description(s):Abstract: CO2 efflux at the soil surface is the result of respiration in different depths that are subjected to variable temperatures at the same time. Therefore, the temperature measurement depth affects the apparent temperature sensitivity of field-measured soil respiration. We summarize existing literature evidence on the importance of this effect, and describe a simple model to understand and estimate the magnitude of this potential error source for heterotrophic respiration. The model is tested against field measurements. We discuss the influence of climate (annual and daily temperature amplitude), soil properties (vertical distribution of CO2 sources, thermal and gas diffusivity), and measurement schedule (frequency, study duration, and time averaging). Q10 as a commonly used parameter describing the temperature sensitivity of soil respiration is taken as an example and computed for different combinations of the above conditions. We define conditions and data acquisition and analysis strategies that lead to lower errors in field-based Q10 determination. It was found that commonly used temperature measurement depths are likely to result in an underestimation of temperature sensitivity in field experiments. Our results also apply to activation energy as an alternative temperature sensitivity parameter.
Identifier(s):DOI: 10.5194/bg-5-1175-2008
Responsible Party
Creator(s):Author: Alexander Graf
Author: Lutz Weihermüller
Author: Johan A. Huisman
Author: Michael Herbst
Author: Jana Bauer
Author: Harry Vereecken
Publisher:European Geosciences Union
TR32 Topic:Soil
Subject(s):CRC/TR32 Keywords: Temperature, Temperature Sensitivity, CO2 Flux
File Details
File Name:2008_Graf_Biogeosciences.pdf
Data Type:Text
Size(s):14 Pages
File Size:879 kB (0.858 MB)
Date(s):Date Accepted: 2008-07-29
Issued: 2008-08-26
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:Ellebach
Measurement Location:Selhausen
Specific Informations - Publication
Article Type:Journal
Number Of Pages:14
Page Range:1175 - 1188
Metadata Details
Metadata Creator:Alexander Graf
Metadata Created:2013-12-02
Metadata Last Updated:2013-12-02
Funding Phase:1
Metadata Language:English
Metadata Version:V40
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