Cross-calibration functions for soil CO2 efflux measurement systems

Different soil CO2 efflux measurement systems and methodologies were used to estimate the annual soil respiration of different forest sites. To allow comparison between these annual values, this study aimed to cross-calibrate five soil CO2 efflux (RS) closed dynamic chamber systems, and compare the in situ measurement methodologies. We first assessed the impact of the measurement methodology on RS by studying the effects of three parameters: record duration, time lag before starting to record and the mode of chamber-soil contact (use of collars or insertion of the chambers into the soil). Secondly, we directly compared systems with identical methodology during field measurements on three forest sites. We observed a significant influence of the chamber-soil contact mode (no impact of the record duration and duration before starting to record). Measurements obtained by insertion led to significantly higher estimates of RS than those obtained using collars (up to 28%). Our inter-comparison showed that deviations existing between in situ measurements performed with the different systems were partly systematic and could be corrected using simple linear equations. Measurements of pressure difference between the inside and the outside of soil chambers allowed explaining a part of the observed deviations between systems. Finally, we assessed the influence of the cross-calibration equations on annual respiration of two beech forest soils. cross calibration / forest ecosystem / measurement system / pressure effect / soil CO2 efflux

[1]  T. A. Black,et al.  Carbon dioxide efflux from the floor of a boreal aspen forest. II. Evaluation of methods — verification by infra-red analysis of a dynamic closed chamber , 1998 .

[2]  Markus Reichstein,et al.  Modeling temporal and large‐scale spatial variability of soil respiration from soil water availability, temperature and vegetation productivity indices , 2003 .

[3]  Ivan A. Janssens,et al.  Forest floor CO2 fluxes estimated by eddy covariance and chamber-based model , 2001 .

[4]  Bernard T. Bormann,et al.  Biases of Chamber Methods for Measuring Soil CO2 Efflux Demonstrated with a Laboratory Apparatus , 1994 .

[5]  M. Aubinet,et al.  Long term carbon dioxide exchange above a mixed forest in the Belgian Ardennes , 2001 .

[6]  J. M. Norman,et al.  Soil surface CO2 fluxes and the carbon budget of a grassland , 1992 .

[7]  Stephanie A. Bohlman,et al.  Seasonal and topographic patterns of forest floor CO(2) efflux from an upland oak forest. , 1993, Tree physiology.

[8]  N. Buchmann,et al.  Measurement of soil respiration. , 2003 .

[9]  V. Dantec,et al.  Soil CO2 efflux in a beech forest: comparison of two closed dynamic systems , 1999, Plant and Soil.

[10]  A. Granier,et al.  Interannual variation of soil respiration in a beech forest ecosystem over a six-year study , 2004 .

[11]  Paul G. Jarvis,et al.  An improved open chamber system for measuring soil CO2 effluxes in the field , 1997 .

[12]  Eric Ceschia,et al.  The carbon balance of a young Beech forest , 2000 .

[13]  W. Schlesinger,et al.  The global carbon dioxide flux in soil respiration and its relationship to vegetation and climate , 1992 .

[14]  Sini Niinistö,et al.  Comparison of different chamber techniques for measuring soil CO2 efflux , 2004 .

[15]  J. Anderson.  Carbon Dioxide Evolution from Two Temperate, Deciduous Woodland Soils , 1973 .

[16]  Ivan A. Janssens,et al.  Assessing forest soil CO(2) efflux: an in situ comparison of four techniques. , 2000, Tree physiology.

[17]  Takashi Hirano,et al.  In situ comparison of four approaches to estimating soil CO2 efflux in a northern larch (Larix kaempferi Sarg.) forest , 2004 .

[18]  Charles T. Garten,et al.  Separating root and soil microbial contributions to soil respiration: A review of methods and observations , 2000 .

[19]  Rattan Lal,et al.  Land Use, Land-Use Change and Forestry , 2015 .

[20]  M. Edwards,et al.  Floral Character Displacement Generates Assemblage Structure of Western Australian Triggerplants (Stylidium) , 1994 .

[21]  Riccardo Valentini,et al.  Fluxes of Carbon, Water and Energy of European Forests , 2003, Ecological Studies.

[22]  E. Rasmussen,et al.  A most beautiful polar low. A case study of a polar low development in the Bear Island region , 1992 .

[23]  R. K. Dixon,et al.  Carbon Pools and Flux of Global Forest Ecosystems , 1994, Science.

[24]  Eric A Davidson,et al.  A comparison of manual and automated systems for soil CO2 flux measurements: trade-offs between spatial and temporal resolution. , 2003, Journal of experimental botany.

[25]  Eric A. Davidson,et al.  Minimizing artifacts and biases in chamber-based measurements of soil respiration , 2002 .

[26]  M. Aubinet,et al.  Soil CO2 efflux measurements in a mixed forest: impact of chamber disturbances, spatial variability and seasonal evolution , 2000 .

[27]  J. Lloyd,et al.  On the temperature dependence of soil respiration , 1994 .

[28]  D. Baldocchi,et al.  Below-canopy and soil CO2 fluxes in a ponderosa pine forest , 1999 .

[29]  Y. Zu,et al.  Effect of collar insertion on soil respiration in a larch forest measured with a LI-6400 soil CO2 flux system , 2005, Journal of Forest Research.