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| Verfasst von: | Machado, Luiz [VerfasserIn]  |
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| | Kesselmeier, Jürgen [VerfasserIn] |
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| | Botía, Santiago [VerfasserIn] |
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| | van Asperen, Hella [VerfasserIn] |
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| | Andreae, Meinrat O. [VerfasserIn] |
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| | de Araújo, Alessandro C. [VerfasserIn] |
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| | Artaxo, Paulo [VerfasserIn] |
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| | Edtbauer, Achim [VerfasserIn] |
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| | R. Ferreira, Rosaria [VerfasserIn] |
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| | Menezes Franco, Marco Aurélio de [VerfasserIn] |
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| | Harder, Hartwig [VerfasserIn] |
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| | Jones, Sam P. [VerfasserIn] |
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| | Dias-Júnior, Cléo Q. [VerfasserIn] |
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| | Haytzmann, Guido G. [VerfasserIn] |
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| | Quesada, Carlos A. [VerfasserIn] |
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| | Komiya, Shujiro [VerfasserIn] |
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| | Lavric, Jost Valentin [VerfasserIn] |
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| | Lelieveld, Jos [VerfasserIn] |
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| | Levin, Ingeborg [VerfasserIn] |
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| | Nölscher, Anke C. [VerfasserIn] |
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| | Pfannerstill, Eva [VerfasserIn] |
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| | Pöhlker, Mira L. [VerfasserIn] |
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| | Pöschl, Ulrich [VerfasserIn] |
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| | Ringsdorf, Akima [VerfasserIn] |
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| | Rizzo, Luciana [VerfasserIn] |
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| | Yáñez-Serrano, Ana M. [VerfasserIn] |
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| | Trumbore, Susan [VerfasserIn] |
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| | Valenti, Wanda I. D. [VerfasserIn] |
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| | Vilà-Guerau de Arellano, Jordi [VerfasserIn] |
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| | Walter, David [VerfasserIn] |
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| | Williams, Jonathan [VerfasserIn] |
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| | Wolff, Stefan [VerfasserIn] |
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| | Pöhlker, Christopher [VerfasserIn] |
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| Titel: | How rainfall events modify trace gas mixing ratios in central Amazonia |
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| Verf.angabe: | Luiz A. T. Machado, Jürgen Kesselmeier, Santiago Botía, Hella van Asperen, Meinrat O. Andreae, Alessandro C. de Araújo, Paulo Artaxo, Achim Edtbauer, Rosaria R. Ferreira, Marco A. Franco, Hartwig Harder, Sam P. Jones, Cléo Q. Dias-Júnior, Guido G. Haytzmann, Carlos A. Quesada, Shujiro Komiya, Jost Lavric, Jos Lelieveld, Ingeborg Levin, Anke Nölscher, Eva Pfannerstill, Mira L. Pöhlker, Ulrich Pöschl, Akima Ringsdorf, Luciana Rizzo, Ana M. Yáñez-Serrano, Susan Trumbore, Wanda I. D. Valenti, Jordi Vila-Guerau de Arellano, David Walter, Jonathan Williams, Stefan Wolff, and Christopher Pöhlker |
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| E-Jahr: | 2024 |
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| Jahr: | August 2024 |
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| Umfang: | 18 S. |
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| Fussnoten: | Online veröffentlicht am 13. August 2024 ; Gesehen am 03.06.2025 |
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| Titel Quelle: | Enthalten in: Atmospheric chemistry and physics |
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| Ort Quelle: | Katlenburg-Lindau : EGU, 2001 |
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| Jahr Quelle: | 2024 |
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| Band/Heft Quelle: | 24(2024), 15 vom: Aug., Seite 8893-8910 |
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| ISSN Quelle: | 1680-7324 |
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| Abstract: | This study investigates the rain-initiated mixing and variability in the mixing ratio of selected trace gases in the atmosphere over the central Amazon rain forest. It builds on comprehensive data from the Amazon Tall Tower Observatory (ATTO), spanning from 2013 to 2020 and comprising the greenhouse gases (GHGs) carbon dioxide (CO2) and methane (CH4); the reactive trace gases carbon monoxide (CO), ozone (O3), nitric oxide (NO), and nitrogen dioxide (NO2); and selected volatile organic compounds (VOCs). Based on more than 1000 analyzed rainfall events, the study resolves the trace gas mixing ratio patterns before, during, and after the rain events, along with vertical mixing ratio gradients across the forest canopy. The assessment of the rainfall events was conducted independently for daytime and nighttime periods, which allows us to elucidate the influence of solar radiation. The mixing ratios of CO2, CO, and CH4 clearly declined during rainfall, which can be attributed to the downdraft-related entrainment of pristine air from higher altitudes into the boundary layer, a reduction of the photosynthetic activity under increased cloud cover, and changes in the surface fluxes. Notably, CO showed a faster reduction than CO2, and the vertical gradient of CO2 and CO is steeper than for CH4. Conversely, the O3 mixing ratio increased across all measurement heights in the course of the rain-related downdrafts. Following the O3 enhancement by up to a factor of 2, NO, NO2, and isoprene mixing ratios decreased. The temporal and vertical variability of the trace gases is intricately linked to the diverse sink and source processes, surface fluxes, and free-troposphere transport. Within the canopy, several interactions unfold among soil, atmosphere, and plants, shaping the overall dynamics. Also, the mixing ratio of biogenic VOCs (BVOCs) clearly varied with rainfall, driven by factors such as light, temperature, physical transport, and soil processes. - - Our results disentangle the patterns in the trace gas mixing ratio in the course of sudden and vigorous atmospheric mixing during rainfall events. By selectively uncovering processes that are not clearly detectable under undisturbed conditions, our results contribute to a better understanding of the trace gas life cycle and its interplay with meteorology, cloud dynamics, and rainfall in the Amazon. |
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| DOI: | doi:10.5194/acp-24-8893-2024 |
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| URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext: https://doi.org/10.5194/acp-24-8893-2024 |
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| | Volltext: https://acp.copernicus.org/articles/24/8893/2024/ |
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| | DOI: https://doi.org/10.5194/acp-24-8893-2024 |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| K10plus-PPN: | 1927304148 |
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| Verknüpfungen: | → Zeitschrift |
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How rainfall events modify trace gas mixing ratios in central Amazonia / Machado, Luiz [VerfasserIn]; August 2024 (Online-Ressource)
