Long-term observations of cloud condensation nuclei over the Amazon rain forest - Part 2: Variability and characteristics of biomass burning, long-range transport, and pristine rain forest aerosols
Abstract
For this study, size-resolved measurements of atmospheric aerosol and cloud condensation nuclei (CCN) concentrations and hygroscopicity were conducted over a full seasonal cycle at the remote Amazon Tall Tower Observatory (ATTO, March 2014–February 2015). In a preceding companion paper, we presented annually and seasonally averaged data and parametrizations (Part 1; Pöhlker et al., 2016a). In the present study (Part 2), we analyze key features and implications of aerosol and CCN properties for the following characteristic atmospheric conditions: Empirically pristine rain forest (PR) conditions, where no influence of pollution was detectable, as observed during parts of the wet season from March to May. The PR episodes are characterized by a bimodal aerosol size distribution (strong Aitken mode with DAit ≈ 70nm and NAit ≈ 160cm-3, weak accumulation mode with Dacc ≈ 160nm and Nacc ≈ 90cm-3), a chemical composition dominated by organic compounds, and relatively low particle hygroscopicity (κAit ≈ 0.12, κacc ≈ 0.18). Long-range-transport (LRT) events, which frequently bring Saharan dust, African biomass smoke, and sea spray aerosols into the Amazon Basin, mostly during February to April. The LRT episodes are characterized by a dominant accumulation mode (DAit ≈ 80nm, NAit ≈ 120cm-3 vs. Dacc ≈ 180nm, Nacc ≈ 310cm-3),more »
- Authors:
-
more »
- Max Planck Inst. for Chemistry, Mainz (Germany). Multiphase Chemistry and Biogeochemistry Dept.
- Max Planck Inst. for Chemistry, Mainz (Germany). Multiphase Chemistry and Biogeochemistry Dept.; Braunschweig Univ. of Technology (Germany)
- Brazilian Agricultural Research Corp. (EMBRAPA), Belem (Brazil)
- Univ. of Sao Paulo (Brazil). Inst. of Physics; Univ. of Clermont Auvergne, Aubière (France). Physical Meterorology Lab.
- Univ. of Sao Paulo (Brazil). Inst. of Physics; Federal Univ. of Uberlandia (Brazil). Inst. of Agrarian Sciences
- Max Planck Inst. for Chemistry, Mainz (Germany). Multiphase Chemistry and Biogeochemistry Dept.; Nanjing Univ. (China). Inst. for Climate and Global Change Research and School of Atmospheric Sciences
- Indian Inst. of Technology (IIT), Madras (India). Environmental and Water Resources Engineering (EWRE) Division and Dept. of Civil Engineering
- Technical Univ. of Darmstadt (Germany). Inst. of Applied Geosciences
- Max Planck Inst. for Biogeochemistry, Jena (Germany). Dept. of Biogeochemical Systems
- Harvard Univ., Cambridge, MA (United States). John A. Paulson School of Engineering and Applied Sciences and Dept. of Earth and Planetary Sciences
- St. Petersburg State Univ. (Russian Federation)
- Federal Univ. of Sao Paulo (UNIFESP) (Brazil). Inst. of Environmental, Chemical and Pharmaceutical Sciences
- Goethe Univ., Frankfurt (Germany). Inst. of Atmospheric and Environmental Sciences; Hessian Agency for Nature Conservation, Environment and Geology (HLNUG), Wiesbaden (Germany)
- Brookhaven National Lab. (BNL), Upton, NY (United States). Biological, Environmental & Climate Sciences Dept.; Snow College, Richfield, UT (United States). Dept. of Chemistry
- Brookhaven National Lab. (BNL), Upton, NY (United States). Biological, Environmental & Climate Sciences Dept.
- Univ. of Sao Paulo (Brazil). Inst. of Physics
- Max Planck Inst. for Chemistry, Mainz (Germany). Multiphase Chemistry and Biogeochemistry Dept.; Univ. of California, San Diego, CA (United States). Scripps Inst. of Oceanography
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); Max Planck Society; German Federal Ministry of Education and Research (BMBF); Ministry of Science, Technology, Innovation and Communication (MCTIC) (Brazil); Amazon State Univ. (UEA), Manaus (Brazil); Amazonas State Research Support Foundation (FAPEAM) (Brazil); National Inst. of Amazonian Research (INPA). Large Scale Biosphere-Atmosphere Program in Amazonia (LBA); German Research Foundation (DFG); European Union (EU); Sao Paulo Research Foundation (FAPESP); Russian Science Federation (RSF); National Aeronautics and Space Administration (NASA)
- OSTI Identifier:
- 1466979
- Report Number(s):
- BNL-208012-2018-JAAM
Journal ID: ISSN 1680-7324
- Grant/Contract Number:
- SC0012704; 01LB1001A; 01.11.01248.00; KA 2280/2; 11.37.220.2016; 603445; 13/05014-0; 13/50510-5; 18-17- 00076
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Atmospheric Chemistry and Physics (Online)
- Additional Journal Information:
- Journal Name: Atmospheric Chemistry and Physics (Online); Journal Volume: 18; Journal Issue: 14; Journal ID: ISSN 1680-7324
- Publisher:
- European Geosciences Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES
Citation Formats
Pöhlker, Mira L., Ditas, Florian, Saturno, Jorge, Klimach, Thomas, Hrabě de Angelis, Isabella, Araùjo, Alessandro C., Brito, Joel, Carbone, Samara, Cheng, Yafang, Chi, Xuguang, Ditz, Reiner, Gunthe, Sachin S., Holanda, Bruna A., Kandler, Konrad, Kesselmeier, Jürgen, Könemann, Tobias, Krüger, Ovid O., Lavrič, Jošt V., Martin, Scot T., Mikhailov, Eugene, Moran-Zuloaga, Daniel, Rizzo, Luciana V., Rose, Diana, Su, Hang, Thalman, Ryan, Walter, David, Wang, Jian, Wolff, Stefan, Barbosa, Henrique M. J., Artaxo, Paulo, Andreae, Meinrat O., Pöschl, Ulrich, and Pöhlker, Christopher. Long-term observations of cloud condensation nuclei over the Amazon rain forest - Part 2: Variability and characteristics of biomass burning, long-range transport, and pristine rain forest aerosols. United States: N. p., 2018.
Web. doi:10.5194/acp-18-10289-2018.
Pöhlker, Mira L., Ditas, Florian, Saturno, Jorge, Klimach, Thomas, Hrabě de Angelis, Isabella, Araùjo, Alessandro C., Brito, Joel, Carbone, Samara, Cheng, Yafang, Chi, Xuguang, Ditz, Reiner, Gunthe, Sachin S., Holanda, Bruna A., Kandler, Konrad, Kesselmeier, Jürgen, Könemann, Tobias, Krüger, Ovid O., Lavrič, Jošt V., Martin, Scot T., Mikhailov, Eugene, Moran-Zuloaga, Daniel, Rizzo, Luciana V., Rose, Diana, Su, Hang, Thalman, Ryan, Walter, David, Wang, Jian, Wolff, Stefan, Barbosa, Henrique M. J., Artaxo, Paulo, Andreae, Meinrat O., Pöschl, Ulrich, & Pöhlker, Christopher. Long-term observations of cloud condensation nuclei over the Amazon rain forest - Part 2: Variability and characteristics of biomass burning, long-range transport, and pristine rain forest aerosols. United States. https://doi.org/10.5194/acp-18-10289-2018
Pöhlker, Mira L., Ditas, Florian, Saturno, Jorge, Klimach, Thomas, Hrabě de Angelis, Isabella, Araùjo, Alessandro C., Brito, Joel, Carbone, Samara, Cheng, Yafang, Chi, Xuguang, Ditz, Reiner, Gunthe, Sachin S., Holanda, Bruna A., Kandler, Konrad, Kesselmeier, Jürgen, Könemann, Tobias, Krüger, Ovid O., Lavrič, Jošt V., Martin, Scot T., Mikhailov, Eugene, Moran-Zuloaga, Daniel, Rizzo, Luciana V., Rose, Diana, Su, Hang, Thalman, Ryan, Walter, David, Wang, Jian, Wolff, Stefan, Barbosa, Henrique M. J., Artaxo, Paulo, Andreae, Meinrat O., Pöschl, Ulrich, and Pöhlker, Christopher. Thu .
"Long-term observations of cloud condensation nuclei over the Amazon rain forest - Part 2: Variability and characteristics of biomass burning, long-range transport, and pristine rain forest aerosols". United States. https://doi.org/10.5194/acp-18-10289-2018. https://www.osti.gov/servlets/purl/1466979.
@article{osti_1466979,
title = {Long-term observations of cloud condensation nuclei over the Amazon rain forest - Part 2: Variability and characteristics of biomass burning, long-range transport, and pristine rain forest aerosols},
author = {Pöhlker, Mira L. and Ditas, Florian and Saturno, Jorge and Klimach, Thomas and Hrabě de Angelis, Isabella and Araùjo, Alessandro C. and Brito, Joel and Carbone, Samara and Cheng, Yafang and Chi, Xuguang and Ditz, Reiner and Gunthe, Sachin S. and Holanda, Bruna A. and Kandler, Konrad and Kesselmeier, Jürgen and Könemann, Tobias and Krüger, Ovid O. and Lavrič, Jošt V. and Martin, Scot T. and Mikhailov, Eugene and Moran-Zuloaga, Daniel and Rizzo, Luciana V. and Rose, Diana and Su, Hang and Thalman, Ryan and Walter, David and Wang, Jian and Wolff, Stefan and Barbosa, Henrique M. J. and Artaxo, Paulo and Andreae, Meinrat O. and Pöschl, Ulrich and Pöhlker, Christopher},
abstractNote = {For this study, size-resolved measurements of atmospheric aerosol and cloud condensation nuclei (CCN) concentrations and hygroscopicity were conducted over a full seasonal cycle at the remote Amazon Tall Tower Observatory (ATTO, March 2014–February 2015). In a preceding companion paper, we presented annually and seasonally averaged data and parametrizations (Part 1; Pöhlker et al., 2016a). In the present study (Part 2), we analyze key features and implications of aerosol and CCN properties for the following characteristic atmospheric conditions: Empirically pristine rain forest (PR) conditions, where no influence of pollution was detectable, as observed during parts of the wet season from March to May. The PR episodes are characterized by a bimodal aerosol size distribution (strong Aitken mode with DAit ≈ 70nm and NAit ≈ 160cm-3, weak accumulation mode with Dacc ≈ 160nm and Nacc ≈ 90cm-3), a chemical composition dominated by organic compounds, and relatively low particle hygroscopicity (κAit ≈ 0.12, κacc ≈ 0.18). Long-range-transport (LRT) events, which frequently bring Saharan dust, African biomass smoke, and sea spray aerosols into the Amazon Basin, mostly during February to April. The LRT episodes are characterized by a dominant accumulation mode (DAit ≈ 80nm, NAit ≈ 120cm-3 vs. Dacc ≈ 180nm, Nacc ≈ 310cm-3), an increased abundance of dust and salt, and relatively high hygroscopicity (κAit ≈ 0.18, κacc ≈ 0.35). The coarse mode is also significantly enhanced during these events. Biomass burning (BB) conditions characteristic for the Amazonian dry season from August to November. The BB episodes show a very strong accumulation mode (DAit ≈ 70nm, NAit ≈ 140cm-3 vs. Dacc ≈ 170nm, Nacc ≈ 3400cm-3), very high organic mass fractions (~90%), and correspondingly low hygroscopicity (κAit ≈ 0.14, κacc ≈ 0.17). Mixed-pollution (MPOL) conditions with a superposition of African and Amazonian aerosol emissions during the dry season. During the MPOL episode presented here as a case study, we observed African aerosols with a broad monomodal distribution (D ≈ 130nm, NCN, 10 ≈ 1300cm-3), with high sulfate mass fractions (~20%) from volcanic sources and correspondingly high hygroscopicity (κ < 100 nm ≈ 0.14, κ > 10 nm ≈ 0.22), which were periodically mixed with fresh smoke from nearby fires (D ≈ 110nm, NCN, 10 ≈ 2800cm-3) with an organic-dominated composition and sharply decreased hygroscopicity (κ < 150 nm ≈ 0.10, κ > 150 nm ≈ 0.20). Insights into the aerosol mixing state are provided by particle hygroscopicity (κ) distribution plots, which indicate largely internal mixing for the PR aerosols (narrow κ distribution) and more external mixing for the BB, LRT, and MPOL aerosols (broad κ distributions). The CCN spectra (CCN concentration plotted against water vapor supersaturation) obtained for the different case studies indicate distinctly different regimes of cloud formation and microphysics depending on aerosol properties and meteorological conditions. The measurement results suggest that CCN activation and droplet formation in convective clouds are mostly aerosol-limited under PR and LRT conditions and updraft-limited under BB and MPOL conditions. Normalized CCN efficiency spectra (CCN divided by aerosol number concentration plotted against water vapor supersaturation) and corresponding parameterizations (Gaussian error function fits) provide a basis for further analysis and model studies of aerosol–cloud interactions in the Amazon.},
doi = {10.5194/acp-18-10289-2018},
journal = {Atmospheric Chemistry and Physics (Online)},
number = 14,
volume = 18,
place = {United States},
year = {Thu Jul 19 00:00:00 EDT 2018},
month = {Thu Jul 19 00:00:00 EDT 2018}
}
Web of Science
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- Rose, D.; Gunthe, S. S.; Su, H.
- Atmospheric Chemistry and Physics, Vol. 11, Issue 6
ACRIDICON–CHUVA Campaign: Studying Tropical Deep Convective Clouds and Precipitation over Amazonia Using the New German Research Aircraft HALO
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- Wendisch, Manfred; Pöschl, Ulrich; Andreae, Meinrat O.
- Bulletin of the American Meteorological Society, Vol. 97, Issue 10
Uncertainty assessment of current size-resolved parameterizations for below-cloud particle scavenging by rain
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- Wang, X.; Zhang, L.; Moran, M. D.
- Atmospheric Chemistry and Physics, Vol. 10, Issue 12
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journal, October 2009
- Stevens, Bjorn; Feingold, Graham
- Nature, Vol. 461, Issue 7264
Effect of nonprecipitating clouds on the aerosol size distribution in the marine boundary layer
journal, February 1986
- Hoppel, W. A.; Frick, G. M.; Larson, R. E.
- Geophysical Research Letters, Vol. 13, Issue 2
Aerosol chemistry during the wet season in central Amazonia: The influence of long-range transport
journal, January 1990
- Talbot, R. W.; Andreae, M. O.; Berresheim, H.
- Journal of Geophysical Research, Vol. 95, Issue D10
Long-term observations of cloud condensation nuclei in the Amazon rain forest – Part 1: Aerosol size distribution, hygroscopicity, and new model parametrizations for CCN prediction
journal, January 2016
- Pöhlker, Mira L.; Pöhlker, Christopher; Ditas, Florian
- Atmospheric Chemistry and Physics, Vol. 16, Issue 24
Monitoring the transport of biomass burning emissions in South America
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- Freitas, Saulo R.; Longo, Karla M.; Silva Dias, Maria A. F.
- Environmental Fluid Mechanics, Vol. 5, Issue 1-2
The transatlantic dust transport from North Africa to the Americas-Its characteristics and source regions: TRANSATLANTIC DUST TRANSPORT
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- Gläser, Gregor; Wernli, Heini; Kerkweg, Astrid
- Journal of Geophysical Research: Atmospheres, Vol. 120, Issue 21
Calibration and measurement uncertainties of a continuous-flow cloud condensation nuclei counter (DMT-CCNC): CCN activation of ammonium sulfate and sodium chloride aerosol particles in theory and experiment
journal, January 2008
- Rose, D.; Gunthe, S. S.; Mikhailov, E.
- Atmospheric Chemistry and Physics, Vol. 8, Issue 5
An overview of the Amazonian Aerosol Characterization Experiment 2008 (AMAZE-08)
journal, January 2010
- Martin, S. T.; Andreae, M. O.; Althausen, D.
- Atmospheric Chemistry and Physics, Vol. 10, Issue 23
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journal, May 2016
- Seinfeld, John H.; Bretherton, Christopher; Carslaw, Kenneth S.
- Proceedings of the National Academy of Sciences, Vol. 113, Issue 21
Aerosol- and updraft-limited regimes of cloud droplet formation: influence of particle number, size and hygroscopicity on the activation of cloud condensation nuclei (CCN)
journal, January 2009
- Reutter, P.; Su, H.; Trentmann, J.
- Atmospheric Chemistry and Physics, Vol. 9, Issue 18
Smoking Rain Clouds over the Amazon
journal, February 2004
- Andreae, M. O.
- Science, Vol. 303, Issue 5662
Fertilizing the Amazon and equatorial Atlantic with West African dust: AFRICAN FERTILIZER FOR AMAZON AND ATLANTIC
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- Bristow, Charlie S.; Hudson-Edwards, Karen A.; Chappell, Adrian
- Geophysical Research Letters, Vol. 37, Issue 14
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- Geophysical Research Letters, Vol. 38, Issue 20
An assessment of vegetation fire in Africa (1981-1991): Burned areas, burned biomass, and atmospheric emissions
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- Global Biogeochemical Cycles, Vol. 13, Issue 4
Electron microscopy of particles collected at Praia, Cape Verde, during the Saharan Mineral Dust Experiment: particle chemistry, shape, mixing state and complex refractive index
journal, January 2011
- Kandler, K.; Lieke, K.; Benker, N.
- Tellus B: Chemical and Physical Meteorology, Vol. 63, Issue 4
Cloud condensation nuclei in the Amazon Basin: “marine” conditions over a continent?
journal, July 2001
- Roberts, Gregory C.; Andreae, Meinrat O.; Zhou, Jingchuan
- Geophysical Research Letters, Vol. 28, Issue 14
Saharan dust in the Amazon Basin
journal, January 1992
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- Tellus B: Chemical and Physical Meteorology, Vol. 44, Issue 2
Correlation between cloud condensation nuclei concentration and aerosol optical thickness in remote and polluted regions
journal, January 2008
- Andreae, M. O.
- Atmospheric Chemistry and Physics Discussions, Vol. 8, Issue 3
Biomass burning aerosol emissions from vegetation fires: particle number and mass emission factors and size distributions
journal, January 2009
- Janhäll, S.; Andreae, M. O.; Pöschl, U.
- Atmospheric Chemistry and Physics Discussions, Vol. 9, Issue 4
Long-term study on coarse mode aerosols in the Amazon rain forest with the frequent intrusion of Saharan dust plumes
journal, January 2018
- Moran-Zuloaga, Daniel; Ditas, Florian; Walter, David
- Atmospheric Chemistry and Physics, Vol. 18, Issue 13
Land cover and its transformation in the backward trajectory footprint region of the Amazon Tall Tower Observatory
journal, January 2019
- Pöhlker, Christopher; Walter, David; Paulsen, Hauke
- Atmospheric Chemistry and Physics, Vol. 19, Issue 13
Introduction: Observations and Modeling of the Green Ocean Amazon (GoAmazon2014/5)
journal, January 2015
- Martin, S. T.; Artaxo, P.; Machado, L. A. T.
- Atmospheric Chemistry and Physics Discussions, Vol. 15, Issue 21
Robust relations between CCN and the vertical evolution of cloud drop size distribution in deep convective clouds
journal, January 2005
- Freud, E.; Rosenfeld, D.; Andreae, M. O.
- Atmospheric Chemistry and Physics Discussions, Vol. 5, Issue 5
Aerosol characteristics and particle production in the upper troposphere over the Amazon Basin
text, January 2018
- Andreae, Meinrat O.; Afchine, Armin; Albrecht, Rachel
- Karlsruhe
Works referencing / citing this record:
African volcanic emissions influencing atmospheric aerosols over the Amazon rain forest
journal, January 2018
- Saturno, Jorge; Ditas, Florian; Penning de Vries, Marloes
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Single-particle characterization of aerosols collected at a remote site in the Amazonian rainforest and an urban site in Manaus, Brazil
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Land cover and its transformation in the backward trajectory footprint region of the Amazon Tall Tower Observatory
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- Atmospheric Chemistry and Physics, Vol. 19, Issue 13
The challenge of simulating the sensitivity of the Amazonian cloud microstructure to cloud condensation nuclei number concentrations
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African volcanic emissions influencing atmospheric aerosols over the Amazon rain forest
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- Saturno, Jorge; Ditas, Florian; Penning de Vries, Marloes
- Atmospheric Chemistry and Physics, Vol. 18, Issue 14
Aitken mode particles as CCN in aerosol- and updraft-sensitive regimes of cloud droplet formation
journal, August 2021
- Pöhlker, Mira L.; Zhang, Minghui; Campos Braga, Ramon
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