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| Titel |
The effects of experimental uncertainty in parameterizing air-sea gas exchange using tracer experiment data |
| VerfasserIn |
W. E. Asher |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 9, no. 1 ; Nr. 9, no. 1 (2009-01-09), S.131-139 |
| Datensatznummer |
250006634
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| Publikation (Nr.) |
 copernicus.org/acp-9-131-2009.pdf |
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| Zusammenfassung |
| It is not practical to measure air-sea gas fluxes in the open ocean for all
conditions and areas of interest. Therefore, in many cases fluxes are
estimated from measurements of air-phase and water-phase gas concentrations,
a measured environmental forcing function such as wind speed, and a
parameterization of the air-sea transfer velocity in terms of the
environmental forcing function. One problem with this approach is that when
direct measurements of the transfer velocity are plotted versus the most
commonly used forcing function, wind speed, there is considerable scatter,
leading to a relatively large uncertainty in the flux. Because it is known
that multiple processes can affect gas transfer, it is commonly assumed that
this scatter is caused by single-forcing function parameterizations being
incomplete in a physical sense. However, scatter in the experimental data
can also result from experimental uncertainty (i.e., measurement error).
Here, results from field and laboratory results are used to estimate how
experimental uncertainty contributes to the observed scatter in the measured
fluxes and transfer velocities as a function of environmental forcing. The
results show that experimental uncertainty could explain half of the
observed scatter in field and laboratory measurements of air-sea gas
transfer velocity. |
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