Free-air CO2 enrichment and soil nitrogen effects on energy balance and evapotranspiration of wheat

B. A. Kimball, R. L. LaMorte, P. J. Pinter, G. W. Wall, D. J. Hunsaker, F. J. Adamsen, Steven Leavitt, T. L. Thompson, A. D. Matthias, T. J. Brooks

Research output: Contribution to journalArticle

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Abstract

In order to determine the likely effects of the increasing atmospheric CO2 concentration on future evapotranspiration, ET, plots of field-grown wheat were exposed to concentrations of 550 μmol/mol CO2 (or 200 μmol/mol above current ambient levels of about 360 μmol/mol) using a free-air CO2 enrichment (FACE) facility. Data were collected for four growing seasons at ample water and fertilizer (high N) and for two seasons when soil nitrogen was limited (low N). Measurements were made of net radiation, R(n); soil heat flux; air and soil temperatures; Canopy temperature, T(s); and wind speed. Sensible heat flux was calculated from the wind and temperature measurements. ET, that is, latent heat flux, was determined as a residual in the energy balance. The FACE treatment increased daytime T(s) about 0.6°and 1.1°C at high and low N, respectively. Daily total R(n) was reduced by 1.3% at both levels of N. Daily ET was consistently lower in the FACE plots, by about 6.7% and 19.5% for high and low N, respectively.

Original languageEnglish (US)
Pages (from-to)1179-1190
Number of pages12
JournalWater Resources Research
Volume35
Issue number4
DOIs
StatePublished - 1999

Fingerprint

Evapotranspiration
soil nitrogen
Energy balance
energy balance
evapotranspiration
Nitrogen
wheat
carbon dioxide
Soils
Heat flux
air
nitrogen
Air
soil
heat
net radiation
latent heat flux
sensible heat flux
soil temperature
heat flux

ASJC Scopus subject areas

  • Aquatic Science
  • Environmental Science(all)
  • Environmental Chemistry
  • Water Science and Technology

Cite this

Kimball, B. A., LaMorte, R. L., Pinter, P. J., Wall, G. W., Hunsaker, D. J., Adamsen, F. J., ... Brooks, T. J. (1999). Free-air CO2 enrichment and soil nitrogen effects on energy balance and evapotranspiration of wheat. Water Resources Research, 35(4), 1179-1190. https://doi.org/10.1029/1998WR900115

Free-air CO2 enrichment and soil nitrogen effects on energy balance and evapotranspiration of wheat. / Kimball, B. A.; LaMorte, R. L.; Pinter, P. J.; Wall, G. W.; Hunsaker, D. J.; Adamsen, F. J.; Leavitt, Steven; Thompson, T. L.; Matthias, A. D.; Brooks, T. J.

In: Water Resources Research, Vol. 35, No. 4, 1999, p. 1179-1190.

Research output: Contribution to journalArticle

Kimball, BA, LaMorte, RL, Pinter, PJ, Wall, GW, Hunsaker, DJ, Adamsen, FJ, Leavitt, S, Thompson, TL, Matthias, AD & Brooks, TJ 1999, 'Free-air CO2 enrichment and soil nitrogen effects on energy balance and evapotranspiration of wheat', Water Resources Research, vol. 35, no. 4, pp. 1179-1190. https://doi.org/10.1029/1998WR900115
Kimball, B. A. ; LaMorte, R. L. ; Pinter, P. J. ; Wall, G. W. ; Hunsaker, D. J. ; Adamsen, F. J. ; Leavitt, Steven ; Thompson, T. L. ; Matthias, A. D. ; Brooks, T. J. / Free-air CO2 enrichment and soil nitrogen effects on energy balance and evapotranspiration of wheat. In: Water Resources Research. 1999 ; Vol. 35, No. 4. pp. 1179-1190.
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