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| Titel |
An overview of the Amazonian Aerosol Characterization Experiment 2008 (AMAZE-08) |
| VerfasserIn |
S. T. Martin, M. O. Andreae, D. Althausen, P. Artaxo, H. Baars, S. Borrmann, Q. Chen, D. K. Farmer, A. Guenther, S. S. Gunthe, J. L. Jimenez, T. Karl, K. Longo, A. Manzi, T. Müller, T. Pauliquevis, M. D. Petters, A. J. Prenni, U. Pöschl, L. V. Rizzo, J. Schneider, J. N. Smith, E. Swietlicki, J. Tota, J. Wang, A. Wiedensohler, S. R. Zorn |
| 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 ; 10, no. 23 ; Nr. 10, no. 23 (2010-12-02), S.11415-11438 |
| Datensatznummer |
250008930
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| Publikation (Nr.) |
 copernicus.org/acp-10-11415-2010.pdf |
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| Zusammenfassung |
| The Amazon Basin provides an excellent environment for studying the sources,
transformations, and properties of natural aerosol particles and the
resulting links between biological processes and climate. With this framework
in mind, the Amazonian Aerosol Characterization Experiment (AMAZE-08),
carried out from 7 February to 14 March 2008 during the wet season in the
central Amazon Basin, sought to understand the formation, transformations,
and cloud-forming properties of fine- and coarse-mode biogenic aerosol
particles, especially as related to their effects on cloud activation and
regional climate. Special foci included (1) the production mechanisms
of secondary organic components at a pristine continental site, including the
factors regulating their temporal variability, and (2) predicting and
understanding the cloud-forming properties of biogenic particles at such
a site. In this overview paper, the field site and the instrumentation
employed during the campaign are introduced. Observations and findings are
reported, including the large-scale context for the campaign,
especially as provided by satellite observations. New findings presented
include: (i) a particle number-diameter distribution from 10 nm to
10 μm that is representative of the pristine tropical rain forest
and recommended for model use; (ii) the absence of substantial quantities of
primary biological particles in the submicron mode as evidenced by mass
spectral characterization; (iii) the large-scale production of secondary
organic material; (iv) insights into the chemical and physical properties of
the particles as revealed by thermodenuder-induced changes in the particle
number-diameter distributions and mass spectra; and (v) comparisons of
ground-based predictions and satellite-based observations of hydrometeor
phase in clouds. A main finding of AMAZE-08 is the dominance of secondary
organic material as particle components. The results presented here provide
mechanistic insight and quantitative parameters that can serve to increase
the accuracy of models of the formation, transformations, and cloud-forming
properties of biogenic natural aerosol particles, especially as related to
their effects on cloud activation and regional climate. |
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