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Diurnal hysteresis between soil CO2 and soil temperature is controlled by soil water content

Publication ,  Journal Article
Riveros-Iregui, DA; Emanuel, RE; Muth, DJ; McGlynn, BL; Epstein, HE; Welsch, DL; Pacific, VJ; Wraith, JM
Published in: Geophysical Research Letters
September 16, 2007

Recent years have seen a growing interest in measuring and modeling soil CO2 efflux, as this flux represents a large component of ecosystem respiration and is a key determinant of ecosystem carbon balance. Process-based models of soil CO2 production and efflux, commonly based on soil temperature, are limited by nonlinearities such as the observed diurnal hysteresis between soil CO2 concentration ([CO2]) and temperature. Here we quantify the degree to which hysteresis between soil [CO2] and soil temperature is controlled by soil water content in a montane conifer forest, and how this nonlinearity impacts estimates of soil CO2 efflux. A representative model that does not consider hysteresis overestimated soil CO2 efflux for the entire growing season by 19%. At high levels of soil water content, hysteresis imposes organized, daily variability in the relationship between soil [CO2] and soil temperature, and at low levels of soil water content, hysteresis is minimized. Copyright 2007 by the American Geophysical Union.

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Published In

Geophysical Research Letters

DOI

ISSN

0094-8276

Publication Date

September 16, 2007

Volume

34

Issue

17

Related Subject Headings

  • Meteorology & Atmospheric Sciences
 

Citation

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Riveros-Iregui, D. A., Emanuel, R. E., Muth, D. J., McGlynn, B. L., Epstein, H. E., Welsch, D. L., … Wraith, J. M. (2007). Diurnal hysteresis between soil CO2 and soil temperature is controlled by soil water content. Geophysical Research Letters, 34(17). https://doi.org/10.1029/2007GL030938
Riveros-Iregui, D. A., R. E. Emanuel, D. J. Muth, B. L. McGlynn, H. E. Epstein, D. L. Welsch, V. J. Pacific, and J. M. Wraith. “Diurnal hysteresis between soil CO2 and soil temperature is controlled by soil water content.” Geophysical Research Letters 34, no. 17 (September 16, 2007). https://doi.org/10.1029/2007GL030938.
Riveros-Iregui DA, Emanuel RE, Muth DJ, McGlynn BL, Epstein HE, Welsch DL, et al. Diurnal hysteresis between soil CO2 and soil temperature is controlled by soil water content. Geophysical Research Letters. 2007 Sep 16;34(17).
Riveros-Iregui, D. A., et al. “Diurnal hysteresis between soil CO2 and soil temperature is controlled by soil water content.” Geophysical Research Letters, vol. 34, no. 17, Sept. 2007. Scopus, doi:10.1029/2007GL030938.
Riveros-Iregui DA, Emanuel RE, Muth DJ, McGlynn BL, Epstein HE, Welsch DL, Pacific VJ, Wraith JM. Diurnal hysteresis between soil CO2 and soil temperature is controlled by soil water content. Geophysical Research Letters. 2007 Sep 16;34(17).
Journal cover image

Published In

Geophysical Research Letters

DOI

ISSN

0094-8276

Publication Date

September 16, 2007

Volume

34

Issue

17

Related Subject Headings

  • Meteorology & Atmospheric Sciences