Isoprene and monoterpene emission rate variability: model evaluations and sensitivity analyses

A. B. Guenther, P. R. Zimmerman, P. C. Harley, R. K. Monson, R. Fall

Research output: Contribution to journalArticle

1098 Scopus citations

Abstract

The temperature dependence of monoterpene emission varies among monoterpenes, plant species, and other factors, but a simple exponential relationship between emission rate (E) and leaf temperature (T), E = Es [exp (β(T - Ts))], provides a good approximation. A review of reported measurements suggests a best estimate of β = 0.09 K-1 for all plants and monoterpenes. Isoprene emissions increase with photosynthetically active radiation up to a saturation point at 700-900 μmol m-2 s-1. An exponential increase in isoprene emission is observed at leaf temperatures of less than 30°C. Emissions continue to increase with higher temperatures until a maximum emission rate is reached at about 40°C, after which emissions rapidly decline. This temperature dependence can be described by an enzyme activation equation that includes denaturation at high temperature. -from Authors

Original languageEnglish (US)
Pages (from-to)12,609-12,617
JournalJournal of geophysical research
Volume98
Issue numberD7
DOIs
StatePublished - 1993

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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