Preprints
https://doi.org/10.5194/acp-2022-601
https://doi.org/10.5194/acp-2022-601
 
31 Aug 2022
31 Aug 2022
Status: this preprint is currently under review for the journal ACP.

Non-volatile marine and non-refractory continental sources of particle-phase amine during the North Atlantic Aerosols and Marine Ecosystems Study (NAAMES)

Veronica Z. Berta1, Lynn M. Russell1, Derek J. Price1,2, Chia-Li Chen3, Alex K. Y. Lee4, Patricia K. Quinn5, Timothy S. Bates5,6, Thomas G. Bell7,8, and Michael J. Behrenfeld9 Veronica Z. Berta et al.
  • 1Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093, USA
  • 2Colorado Department of Public Health and Environment, Air Pollution Control Division, Denver, CO, 80246, USA
  • 3California Air Resources Board, Riverside, CA 92507, USA
  • 4Air Quality Processes Research Section, Environment and Climate Change Canada, Toronto, ON M3H 5T4, Canada
  • 5NOAA Pacific Marine Environmental Laboratory, Seattle, WA 98115, USA
  • 6Cooperative Institute for Climate, Ocean and Ecosystems Studies, University of Washington, Seattle, WA 98195, USA
  • 7Plymouth Marine Laboratory, Plymouth, PL1 3DH, UK
  • 8Department of Earth System Science, University of California, Irvine, CA, USA
  • 9Department of Botany and Plant Pathology, Oregon State University, Corvallis, 97331 OR, USA

Abstract. Amines were measured by aerosol mass spectrometry (AMS) and Fourier Transform Infrared (FTIR) spectroscopy during the North Atlantic Aerosols and Marine Ecosystems Study (NAAMES) cruises. Both AMS non-refractory (NR) amine ion fragments comprising the AMS CxHyNz family and FTIR non-volatile (NV) amine measured as primary (C-NH2) amine groups typically had greater concentrations in continental air masses than marine air masses. Secondary continental sources of AMS NR amine fragments were identified by consistent correlations to AMS NR nitrate, AMS NR m/z 44, IC non-sea salt potassium, and radon for most air masses. FTIR NV amine group mass concentrations for particles with diameters <1 μm showed large contributions from a primary marine source that was identified by significant correlations with measurements of wind speed, chlorophyll a, seawater dimethylsulfide (DMS), AMS NR chloride, and ion chromatography (IC) sea salt as well as FTIR NV alcohol groups in both marine and continental air masses. FTIR NV amine group mass concentrations in <0.18 μm and <0.5 μm particle samples in marine air masses likely have a biogenic secondary source associated with strong correlations to FTIR NV acid groups, which are not present for <1 μm particle samples. The average seasonal contribution of AMS NR amine fragments and FTIR NV amine groups ranged from 27 % primary marine amine and 73 % secondary continental amine during Early Spring to 53 % primary amine and 47 % secondary continental amine during Winter. These results demonstrate that AMS NR and FTIR NV amine measurements are complementary and can be used together to investigate the variety and sources of amines in the marine environment.

Veronica Z. Berta et al.

Status: open (until 23 Oct 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Veronica Z. Berta et al.

Data sets

Aerosol Particle Chemical and Physical Measurements on the 2015, 2016, 2017, and 2018 North Atlantic Aerosols and Marine Ecosystems Study (NAAMES) Research Cruises Russell, Lynn M.; Chen, Chia-Li; Betha, Raghu; Price, Derek J.; Lewis, Savannah https://doi.org/10.6075/J04T6GJ6

Veronica Z. Berta et al.

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Short summary
Amines are compounds emitted from a variety of marine and continental sources, which were measured by aerosol mass spectrometry and Fourier Transform Infrared spectroscopy during the North Atlantic Aerosols and Marine Ecosystems Study (NAAMES) cruises. Secondary continental and primary marine sources of amines were identified by comparisons to tracers. The results show that the two methods are complementary for investigating amines in the marine environment.
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