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Chemical Signatures of Seasonally Unique Anthropogenic Influences on Organic Aerosol Composition in the Central Amazon

Journal Article · · Environmental Science and Technology
 [1];  [2];  [2];  [3];  [4];  [2];  [5];  [6];  [7];  [8];  [8];  [9];  [10];  [11];  [8];  [12];  [2]
  1. Univ. of California, Berkeley, CA (United States); Colorado State Univ., Fort Collins, CO (United States); University of California, Berkeley
  2. Univ. of California, Berkeley, CA (United States)
  3. Univ. of California, Berkeley, CA (United States); Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
  4. Aerosol Dynamics, Inc., Berkeley, CA (United States)
  5. Univ. of California, Berkeley and Riverside, CA (United States)
  6. Univ. of Colorado, Boulder, CO (United States). Cooperative Inst. for Research in Environmental Sciences (CIRES); National Center for Atmospheric Research (NCAR), Boulder, CO (United States)
  7. Univ. of Colorado, Boulder, CO (United States). Cooperative Inst. for Research in Environmental Sciences (CIRES); Chinese Academy of Sciences (CAS), Guangzhou (China). Guangzhou Institute of Geochemistry
  8. Univ. of Colorado, Boulder, CO (United States). Cooperative Inst. for Research in Environmental Sciences (CIRES)
  9. National Institute for Space Research (INPE), São Paulo (Brazil)
  10. Univ. of Sao Paulo (Brazil)
  11. Amazonas State University, Manaus (Brazil)
  12. Harvard Univ., Cambridge, MA (United States)
Urbanization and fires perturb the quantities and composition of fine organic aerosol in the central Amazon, with ramifications for radiative forcing and public health. These disturbances include not only direct emissions of particulates and secondary organic aerosol (SOA) precursors, but also changes in the pathways through which biogenic precursors form SOA. The composition of ambient organic aerosol is complex and incompletely characterized, encompassing millions of potential structures relatively few of which have been synthesized and characterized. Through analysis of submicron aerosol samples from the Green Ocean Amazon (GoAmazon2014/5) field campaign by two-dimensional gas chromatography coupled with machine learning, ~1300 unique compounds were traced and characterized over two seasons. Fires and urban emissions produced chemically and interseasonally distinct impacts on product signatures, with only ~50% of compounds observed in both seasons. Seasonally unique populations point to the importance of aqueous processing in Amazonian aerosol ageing, but further mechanistic insights are impeded by limited product identity knowledge. Further, less than 10% of compounds were identifiable at an isomer-specific level. Overall, the findings (i) provide compositional characterization of anthropogenic influence on submicron organic aerosol in the Amazon, (ii) identify key season-to-season differences in chemical signatures, and (iii) highlight high-priority knowledge gaps in current speciated knowledge.
Research Organization:
Univ. of California, Berkeley, CA (United States)
Sponsoring Organization:
National Science Fund (NSF); USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
SC0011105; SC0020051
OSTI ID:
1995728
Journal Information:
Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 15 Vol. 57; ISSN 0013-936X
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (49)

Highly reactive light‐dependent monoterpenes in the Amazon journal March 2015
An assessment of the origin and composition of higher molecular weight organic matter in aerosols over Amazonia journal January 1990
Monoterpene SOA – Contribution of first-generation oxidation products to formation and chemical composition journal April 2016
Observations of Manaus urban plume evolution and interaction with biogenic emissions in GoAmazon 2014/5 journal October 2018
Levoglucosan as a tracer of biomass burning: Recent progress and perspectives journal May 2019
Characterization and biodegradation of water-soluble biomarkers and organic carbon extracted from low temperature chars journal March 2013
Identification and emission factors of molecular tracers in organic aerosols from biomass burning Part 2. Deciduous trees journal October 2001
Formation of new particles in the gas-phase ozonolysis of monoterpenes journal January 2000
Known and Unexplored Organic Constituents in the Earth's Atmosphere journal March 2007
Impact of Urban Pollution on Organic-Mediated New-Particle Formation and Particle Number Concentration in the Amazon Rainforest journal March 2021
Quantifying Atmospheric Parameter Ranges for Ambient Secondary Organic Aerosol Formation journal July 2021
Secondary Organic Aerosol Formation from Healthy and Aphid-Stressed Scots Pine Emissions journal August 2019
Gas-Phase OH Oxidation of Monoterpenes: Gaseous and Particulate Products journal January 2001
Water-soluble organic compounds in biomass burning aerosols over Amazonia1. Characterization by NMR and GC-MS journal January 2002
Water-soluble organic compounds in biomass burning aerosols over Amazonia 2. Apportionment of the chemical composition and importance of the polyacidic fraction journal January 2002
Overview of the inorganic and organic composition of size-segregated aerosol in Rondônia, Brazil, from the biomass-burning period to the onset of the wet season journal January 2007
Sources and properties of Amazonian aerosol particles journal January 2010
Mass spectral characterization of submicron biogenic organic particles in the Amazon Basin journal January 2009
Premature Deaths in Brazil Associated With Long‐Term Exposure to PM 2.5 From Amazon Fires Between 2016 and 2019 journal August 2020
The Amazon basin in transition journal January 2012
Carbon oxidation state as a metric for describing the chemistry of atmospheric organic aerosol journal January 2011
Urban pollution greatly enhances formation of natural aerosols over the Amazon rainforest journal March 2019
Atmospheric aerosols in Amazonia and land use change: from natural biogenic to biomass burning conditions journal January 2013
Organosulfates in aerosols downwind of an urban region in central Amazon journal January 2018
Direct observation of aqueous secondary organic aerosol from biomass-burning emissions journal August 2016
Monoterpenes are the largest source of summertime organic aerosol in the southeastern United States journal February 2018
Recent deforestation drove the spike in Amazonian fires journal December 2020
Isoprene photo-oxidation products quantify the effect of pollution on hydroxyl radicals over Amazonia journal April 2018
The fuel of atmospheric chemistry: Toward a complete description of reactive organic carbon journal February 2020
Linking Meteorology, Turbulence, and Air Chemistry in the Amazon Rain Forest journal December 2016
Impact of exposure to smoke from biomass burning in the Amazon rain forest on human health journal October 2021
Aqueous chemistry and its role in secondary organic aerosol (SOA) formation journal January 2010
Insights into secondary organic aerosol formed via aqueous-phase reactions of phenolic compounds based on high resolution mass spectrometry journal January 2010
Molecular transformations of phenolic SOA during photochemical aging in the aqueous phase: competition among oligomerization, functionalization, and fragmentation journal January 2016
Aircraft observations of the chemical composition and aging of aerosol in the Manaus urban plume during GoAmazon 2014/5 journal January 2018
Secondary organic aerosol formation from ambient air in an oxidation flow reactor in central Amazonia journal January 2018
Impact of biomass burning aerosols on radiation, clouds, and precipitation over the Amazon: relative importance of aerosol–cloud and aerosol–radiation interactions journal November 2020
Exploration of oxidative chemistry and secondary organic aerosol formation in the Amazon during the wet season: explicit modeling of the Manaus urban plume with GECKO-A journal May 2020
Molecular composition and photochemical evolution of water-soluble organic carbon (WSOC) extracted from field biomass burning aerosols using high-resolution mass spectrometry journal January 2020
Aerosols from anthropogenic and biogenic sources and their interactions – modeling aerosol formation, optical properties, and impacts over the central Amazon basin journal January 2021
Secondary organic aerosol formation in cloud droplets and aqueous particles (aqSOA): a review of laboratory, field and model studies journal January 2011
Introduction: Observations and Modeling of the Green Ocean Amazon (GoAmazon2014/5) journal January 2016
Contributions of mobile, stationary and biogenic sources to air pollution in the Amazon rainforest: a numerical study with the WRF-Chem model journal January 2017
Observations of sesquiterpenes and their oxidation products in central Amazonia during the wet and dry seasons journal January 2018
Urban influence on the concentration and composition of submicron particulate matter in central Amazonia journal January 2018
Is there an aerosol signature of chemical cloud processing? journal January 2018
Contributions of biomass-burning, urban, and biogenic emissions to the concentrations and light-absorbing properties of particulate matter in central Amazonia during the dry season journal January 2019
Physical properties of the sub-micrometer aerosol over the Amazon rain forest during the wet-to-dry season transition - comparison of modeled and measured CCN concentrations journal January 2004
Comprehensive detection of analytes in large chromatographic datasets by coupling factor analysis with a decision tree journal September 2022

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