African volcanic emissions influencing atmospheric aerosol particles over the Amazon rain forest

Saturno, Jorge; Ditas, Florian; Vries, Marloes Penning de; Holanda, Bruna A.; Pöhlker, Mira L.; Carbone, Samara; Walter, David; Bobrowski, Nicole; Brito, Joel; Chi, Xuguang; Gutmann, A.; Angelis, Isabella Hrabě de; Machado, Luiz A. T.; Morán-Zuloaga, Daniel; Rüdiger, Julian; Schneider, Johannes; Schulz, Christiane; Wendisch, Manfred; Artaxo, Paulo; Wagner, Thomas; Pöschl, Ulrich; Andreae, Meinrat O.; Pöhlker, Christopher

doi:10.5194/acp-2017-1152

Cited by 5 publications

(3 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These emissions could be related to ship traffic in the Atlantic Ocean, BB in southern Africa, or power plant emissions from the west African coast. Low OA-to-sulfate ratios with high ω 0 occurred a few times and could be explained by high sulfate input from volcanic emissions in the Congo (Fioletov et al, 2016;Saturno et al, 2017a), rather than fossil fuel emissions, which are typically rich in BC.…”

Section: Absorption Wavelength Dependence and Brc Contributionmentioning

confidence: 99%

Black and brown carbon over central Amazonia: Long-term aerosol measurements at the ATTO site

Saturno¹,

Holanda²,

Pöhlker³

et al. 2017

Preprint

Self Cite

View full text Add to dashboard Cite

Abstract. The Amazon rain forest is considered a very sensitive ecosystem that could be significantly affected by a changing climate. It is still one of the few places on Earth where the atmosphere in the continent approaches near-pristine conditions for some periods of the year. The Amazon Tall Tower Observatory (ATTO) has been built in central Amazonia to monitor the atmospheric and forest ecosystem conditions. The atmospheric conditions at the ATTO site oscillate between biogenic and biomass burning (BB) dominated states. By using a comprehensive ground-based aerosol measurement setup, we studied the physical and chemical properties of aerosol particles at the ATTO site. This parameterization of å abs as a function of the BC to OA mass ratio was investigated and was found applicable to tropical forest emissions but further investigation is required, especially by segregating fuel types. Additionally, important enhancements of the BC mass absorption cross-section (α abs ) were found over the measurement period. This enhancement could be linked to heavy coating of the BC aerosol particles. In the future, the BC mixing state should be systematically investigated by using different instrumental approaches.

show abstract

Section: Absorption Wavelength Dependence and Brc Contributionmentioning

confidence: 99%

Black and brown carbon over central Amazonia: Long-term aerosol measurements at the ATTO site

Saturno¹,

Holanda²,

Pöhlker³

et al. 2017

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…These quickly and substantially changing aerosol regimes will presumably also impact the cloud conditions during dry season. (iii) Finally, the Amazonian aerosol and CCN population can be substantially perturbed by emissions from sources (i.e., volcanoes in the Eastern Congo) that are remarkably far away from the ATTO site (~10,000 km) (Saturno et al, 2017a). This emphasizes very clearly that intercontinental influences have to be considered carefully in the anal-30 ysis of the Amazonian atmospheric composition.…”

mentioning

confidence: 98%

Long-term observations of cloud condensation nuclei in the Amazon rain forest – Part 2: Variability and characteristic differences under near-pristine, biomass burning, and long-range transport conditions

Pöhlker

Ditas

Saturno

et al. 2017

Preprint

Self Cite

View full text Add to dashboard Cite

Size-resolved measurements of atmospheric aerosol and cloud condensation nuclei (CCN) concentrations and hygroscopicity were conducted at the remote Amazon Tall Tower Observatory (ATTO) in the central Amazon Basin over a full seasonal cycle (Mar 2014 -Feb 2015. In a companion part 1 paper, we presented an in-depth CCN characterization based on annually as well as seasonally averaged time intervals and discuss different para-5 metrization strategies to represent the Amazonian CCN cycling in modelling studies (M. Pöhlker et. al. 2016b).The present part 2 study analyzes the aerosol and CCN variability in original time resolution and, thus, resolves aerosol advection and transformation for the following case studies, which represent the most characteristic states of the Amazonian atmosphere: ), a mostly organic particle composition, and relatively low hygroscopicity levels (κAit = 0.12 vs. κacc = 0.18). The NP CCN efficiency spectrum shows that the CCN population is sensitive to changes in supersaturation (S) over a wide S range. Atmos. Chem. Phys. Discuss., https://doi

show abstract

“…The eruption of Pinatubo in 1991 reached the stratosphere [28], allowing the long-range spread of aerosols. Volcanic emissions from Africa have been measured above the Amazon rain forest [29], and SO 2 from southern Chile reached South Africa [30]. However, due to the mix of anthropogenic, biotic, and volcanic sulfur in the atmosphere, to our knowledge there are few studies on the exact impact of volcanic SO 2 on forests.…”

Section: Introductionmentioning

confidence: 99%

Impact of Volcanic Sulfur Emissions on the Pine Forest of La Palma, Spain

Weiser

Baumann

Jentsch

et al. 2022

Forests

View full text Add to dashboard Cite

In autumn 2021, the largest volcanic eruption on the island of La Palma in historic records took place. The Canary Islands are of volcanic origin and eruptions have always constituted part of their natural disturbance regime. Until recently, their impacts could not be directly observed and studied. Influence of the emission of phytotoxic gases on biodiversity and ecosystem dynamics was hitherto unknown. The recent eruption is still being intensely monitored. We used Sentinel-2 remote sensing data to analyze the spatial extent and intensity of the impact related to sulfuric emissions, aiming to understand the damage patterns in Canary pine forest. The emissions damaged 10% of that forest and affected 5.3% of the Natura 2000 protected areas. We concluded that this is largely due to the toxic effects of the enormous emissions of SO2. We found a clear correlation between the change in the normalized difference vegetation index (NDVI) and distance from the eruption. This pattern was weakly anisotropic, with stronger damage in southern directions. Counteracting effects, such as ash deposition, were largely excluded by combining NDVI change detection with tree cover density. We expect that vegetation damage will be transient. P. canariensis can resprout after forest fires, where most leaves are lost. Consequently, our assessment can serve as a reference for future ecosystem regeneration.

show abstract

African volcanic emissions influencing atmospheric aerosol particles over the Amazon rain forest

Cited by 5 publications

References 33 publications

Black and brown carbon over central Amazonia: Long-term aerosol measurements at the ATTO site

Black and brown carbon over central Amazonia: Long-term aerosol measurements at the ATTO site

Long-term observations of cloud condensation nuclei in the Amazon rain forest – Part 2: Variability and characteristic differences under near-pristine, biomass burning, and long-range transport conditions

Impact of Volcanic Sulfur Emissions on the Pine Forest of La Palma, Spain

Contact Info

Product

Resources

About