Measurement depth effects on the apparent temperature sensitivity of soil respiration in field studies
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| Title: | Main Title: Measurement depth effects on the apparent temperature sensitivity of soil respiration in field studies |
| Description: | 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: | 10.5194/bg-5-1175-2008 (DOI) |
Responsible Party
| Creators: | Alexander Graf (Author), Lutz Weihermüller (Author), Johan A. Huisman (Author), Michael Herbst (Author), Jana Bauer (Author), Harry Vereecken (Author) |
| Publisher: | European Geosciences Union |
| Publication Year: | 2013 |
Topic
| TR32 Topic: | Soil |
| Related Subproject: | B1 |
| Subjects: | Keywords: Temperature, Temperature Sensitivity, CO2 Flux |
File Details
| Filename: | 2008_Graf_Biogeosciences.pdf |
| Data Type: | Text - Article |
| Size: | 14 Pages |
| File Size: | 879 KB |
| Dates: | Accepted: 29.07.2008 Issued: 26.08.2008 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Only Project Members |
| General Access and Use Conditions: | For internal use only |
| Access Limitations: | For internal use only |
| Licence: | [TR32DB] Data policy agreement |
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Specific Information - Publication
| Publication Status: | Published |
| Review Status: | Peer reviewed |
| Publication Type: | Article |
| Article Type: | Journal |
| Source: | Biogeosciences |
| Source Website: | www.biogeosciences.net |
| Volume: | 5 |
| Number of Pages: | 14 (1175 - 1188) |
Metadata Details
| Metadata Creator: | Alexander Graf |
| Metadata Created: | 02.12.2013 |
| Metadata Last Updated: | 02.12.2013 |
| Subproject: | B1 |
| Funding Phase: | 1 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Metadata Downloads: | 0 |
| Dataset Downloads: | 1 |
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