Hauptseite > Publikationsdatenbank > The leaf-level emission factor of volatile isoprenoids: caveats, model algorithms, response shapes and scaling > print

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005     20240712101021.0
024 7 _ |a 10.5194/bg-7-1809-2010
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024 7 _ |a 2128/20931
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037 _ _ |a PreJuSER-13371
041 _ _ |a eng
082 _ _ |a 570
084 _ _ |2 WoS
|a Ecology
084 _ _ |2 WoS
|a Geosciences, Multidisciplinary
100 1 _ |0 P:(DE-HGF)0
|a Niinemets, Ü.
|b 0
245 _ _ |a The leaf-level emission factor of volatile isoprenoids: caveats, model algorithms, response shapes and scaling
260 _ _ |a Katlenburg-Lindau [u.a.]
|b Copernicus
|c 2010
300 _ _ |a 1809 - 1832
336 7 _ |a Journal Article
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336 7 _ |a JOURNAL_ARTICLE
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336 7 _ |a article
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440 _ 0 |0 14761
|a Biogeosciences
|v 7
|x 1726-4170
|y 6
500 _ _ |a This paper arose as the result of stimulating discussions at the European Science Foundation (VOCBAS and INTROP programmes) science meeting Biogenic Volatile Organic Compounds: Sources and Fates in a Changing World, 2 October-5 October 2007, Montpellier, France. The authors' work on BVOC emissions has been supported by the Estonian Ministry of Education and Research (grant SF1090065s07), the Estonian Science Foundation (grant 7645), the US National Science Foundation and the US Environmental Protection Agency, the join collaborative project between Spanish CSIC and the Estonian Academy of Sciences, the Spanish Government (grants CGL2006-04025/BOS and Consolider-Ingenio Montes CSD2008-00040), the Catalan government (grant SGR2009-458), the Human Frontier Science Programme, the Swedish Research Councils VR and Formas. We thank Rudiger Grote, Alex Guenther, Peter Harley, Trevor Keenan, Thomas Karl, Manuel Lerdau and Georg Wohlfahrt for illuminating comments on the manuscript.
520 _ _ |a In models of plant volatile isoprenoid emissions, the instantaneous compound emission rate typically scales with the plant's emission potential under specified environmental conditions, also called as the emission factor, E-S. In the most widely employed plant isoprenoid emission models, the algorithms developed by Guenther and colleagues (1991, 1993), instantaneous variation of the steady-state emission rate is described as the product of E-S and light and temperature response functions. When these models are employed in the atmospheric chemistry modeling community, species-specific E-S values and parameter values defining the instantaneous response curves are often taken as initially defined. In the current review, we argue that E-S as a characteristic used in the models importantly depends on our understanding of which environmental factors affect isoprenoid emissions, and consequently need standardization during experimental E-S determinations. In particular, there is now increasing consensus that in addition to variations in light and temperature, alterations in atmospheric and/or within-leaf CO2 concentrations may need to be included in the emission models. Furthermore, we demonstrate that for less volatile isoprenoids, mono- and sesquiterpenes, the emissions are often jointly controlled by the compound synthesis and volatility. Because of these combined biochemical and physico-chemical drivers, specification of E-S as a constant value is incapable of describing instantaneous emissions within the sole assumptions of fluctuating light and temperature as used in the standard algorithms. The definition of E-S also varies depending on the degree of aggregation of E-S values in different parameterization schemes (leaf- vs. canopy- or region-scale, species vs. plant functional type levels) and various aggregated E-S schemes are not compatible for different integration models. The summarized information collectively emphasizes the need to update model algorithms by including missing environmental and physico-chemical controls, and always to define E-S within the proper context of model structure and spatial and temporal resolution.
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700 1 _ |0 P:(DE-HGF)0
|a Monson, R.K.
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700 1 _ |0 P:(DE-HGF)0
|a Arneth, A.
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700 1 _ |0 P:(DE-HGF)0
|a Ciccioli, P.
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700 1 _ |0 P:(DE-HGF)0
|a Kesselmeier, J.
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|a Kuhn, U.
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|a Noe, S.M.
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700 1 _ |0 P:(DE-HGF)0
|a Penuelas, J.
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700 1 _ |0 P:(DE-HGF)0
|a Staudt, M.
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773 _ _ |0 PERI:(DE-600)2158181-2
|a 10.5194/bg-7-1809-2010
|g Vol. 7, p. 1809 - 1832
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|t Biogeosciences
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856 7 _ |u http://dx.doi.org/10.5194/bg-7-1809-2010
856 4 _ |u https://juser.fz-juelich.de/record/13371/files/bg-7-1809-2010.pdf
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