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| Titel |
Estimations of isoprenoid emission capacity from enclosure studies: measurements, data processing, quality and standardized measurement protocols |
| VerfasserIn |
Ü. Niinemets, U. Kuhn, P. C. Harley, M. Staudt, A. Arneth, A. Cescatti, P. Ciccioli, L. Copolovici, C. Geron, A. Guenther, J. Kesselmeier, M. T. Lerdau, R. K. Monson, J. Peñuelas |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 8, no. 8 ; Nr. 8, no. 8 (2011-08-18), S.2209-2246 |
| Datensatznummer |
250006080
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| Publikation (Nr.) |
 copernicus.org/bg-8-2209-2011.pdf |
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| Zusammenfassung |
| The capacity for volatile isoprenoid production under standardized
environmental conditions at a certain time (ES, the emission factor) is
a key characteristic in constructing isoprenoid emission inventories.
However, there is large variation in published ES estimates for any
given species partly driven by dynamic modifications in ES due to
acclimation and stress responses. Here we review additional sources of
variation in ES estimates that are due to measurement and analytical
techniques and calculation and averaging procedures, and demonstrate that
estimations of ES critically depend on applied experimental protocols
and on data processing and reporting. A great variety of experimental setups
has been used in the past, contributing to study-to-study variations in
ES estimates. We suggest that past experimental data should be
distributed into broad quality classes depending on whether the data can or
cannot be considered quantitative based on rigorous experimental standards.
Apart from analytical issues, the accuracy of ES values is strongly
driven by extrapolation and integration errors introduced during data
processing. Additional sources of error, especially in meta-database
construction, can further arise from inconsistent use of units and
expression bases of ES. We propose a standardized experimental protocol
for BVOC estimations and highlight basic meta-information that we strongly
recommend to report with any ES measurement. We conclude that
standardization of experimental and calculation protocols and critical
examination of past reports is essential for development of accurate
emission factor databases. |
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