Preprints
https://doi.org/10.5194/egusphere-2024-1912
https://doi.org/10.5194/egusphere-2024-1912
01 Jul 2024
 | 01 Jul 2024
Status: this preprint is open for discussion and under review for Atmospheric Chemistry and Physics (ACP).

Observations of high time-resolution and size-resolved aerosol chemical composition and microphyscis in the central Arctic: implications for climate-relevant particle properties

Benjamin Heutte, Nora Bergner, Hélène Angot, Jakob B. Pernov, Lubna Dada, Jessica A. Mirrielees, Ivo Beck, Andrea Baccarini, Matthew Boyer, Jessie M. Creamean, Kaspar R. Daellenbach, Imad El Haddad, Markus M. Frey, Silvia Henning, Tiaa Laurila, Vaios Moschos, Tuukka Petäjä, Kerri A. Pratt, Lauriane L. J. Quéléver, Matthew D. Shupe, Paul Zieger, Tuija Jokinen, and Julia Schmale

Abstract. Aerosols play a critical role in the Arctic’s radiative balance, influencing solar radiation and cloud formation based on their physicochemical properties (e.g., size, abundance, and chemical composition). Limited observations in the central Arctic leave gaps in understanding aerosol dynamics year-round, affecting model predictions of climate-relevant properties. Here, we present the first annual high-time resolution observations of submicron aerosol chemical composition in the central Arctic during the Arctic Ocean 2018 (AO2018) and the 2019–2020 Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expeditions. Seasonal variations in aerosol mass concentrations and chemical composition were found to be driven by typical Arctic seasonal regimes. Organic aerosols dominated the pristine summer, while anthropogenic sulfate prevailed in autumn and spring under Arctic haze conditions. Ammonium, which impacts aerosol acidity, was consistently less abundant, relative to sulfate, in the central Arctic compared to lower latitudes of the Arctic. Cyclonic (storm) activity was found to have a significant influence on aerosol variability by enhancing both emission from local sources and transport of remote aerosol, with locally wind-generated particles contributing up to 80 % (20 %) of the cloud condensation nuclei population in autumn (spring). While the analysis presented herein provides the current central Arctic aerosol baseline, which will serve to improve climate model predictions in the region, it also underscores the importance of integrating short-timescale processes, such as seasonal wind-driven aerosol sources from blowing snow and open leads/ocean in model simulations, especially in light of the declining mid-latitude anthropogenic emissions influence and the increasing local anthropogenic emissions.

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Benjamin Heutte, Nora Bergner, Hélène Angot, Jakob B. Pernov, Lubna Dada, Jessica A. Mirrielees, Ivo Beck, Andrea Baccarini, Matthew Boyer, Jessie M. Creamean, Kaspar R. Daellenbach, Imad El Haddad, Markus M. Frey, Silvia Henning, Tiaa Laurila, Vaios Moschos, Tuukka Petäjä, Kerri A. Pratt, Lauriane L. J. Quéléver, Matthew D. Shupe, Paul Zieger, Tuija Jokinen, and Julia Schmale

Status: open (until 31 Aug 2024)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2024-1912', Anonymous Referee #1, 22 Jul 2024 reply
Benjamin Heutte, Nora Bergner, Hélène Angot, Jakob B. Pernov, Lubna Dada, Jessica A. Mirrielees, Ivo Beck, Andrea Baccarini, Matthew Boyer, Jessie M. Creamean, Kaspar R. Daellenbach, Imad El Haddad, Markus M. Frey, Silvia Henning, Tiaa Laurila, Vaios Moschos, Tuukka Petäjä, Kerri A. Pratt, Lauriane L. J. Quéléver, Matthew D. Shupe, Paul Zieger, Tuija Jokinen, and Julia Schmale

Data sets

Aerosol chemical composition during the Arctic Ocean 2018 expedition Lubna Dada, Julia Schmale, Kaspar Daellenbach, and Andrea Baccarini https://doi.org/10.17043/oden-ao-2018-aerosol-ams-1

Equivalent black carbon concentration measured with an aethalometer AE33 during the Arctic Ocean 2018 expedition Benjamin Heutte, Andrea Baccarini, Paul Zieger, and Julia Schmale https://doi.org/10.17043/oden-ao-2018-aerosol-ebc-ae33-1

Size distribution of interstitial and total particles between 18 and 660 nm collected during the Arctic Ocean 2018 expedition Andrea Baccarini and Julia Schmale https://doi.org/10.17043/oden-ao-2018-aerosol-smps-1

Bulk size-resolved chemical composition and mass concentration of non-refractory submicron aerosols measured in the Swiss container during MOSAiC 2019/2020 Benjamin Heutte, Lubna Dada, Hélène Angot, Kaspar R. Daellenbach, Imad El Haddad, Ivo Beck, Lauriane Quéléver, Tuija Jokinen, Tiia Laurila, and Julia Schmale https://doi.org/10.1594/PANGAEA.961009

Equivalent black carbon concentration in 10 minutes time resolution, measured in the Swiss container during MOSAiC 2019/2020 Benjamin Heutte, Ivo Beck, Lauriane Quéléver, Tuija Jokinen, Tiia Laurial, Lubna Dada, and Julia Schmale https://doi.org/10.1594/PANGAEA.952251

AOS: Scanning-Mobility Particle Sizer Kuang et al. https://doi.org/10.5439/1476898

Aerodynamic Particle Sizer spectrometer (APS) aerosol number concentrations, measured in the Swiss container during MOSAiC 2019/2020 Nora Bergner, Ivo Beck, Lauriane Quéléver, Tuija Jokinen, Tiia Laurila, Lubna Dada, and Julia Schmale https://doi.org/10.1594/PANGAEA.960923

Cloud Condensation Nuclei (CCN) concentrations measured in the Swiss container during MOSAiC 2019/2020 Nora Bergner, Benjamin Heutte, Hélène Angot, Lubna Dada, Ivo Beck, Lauriane Quéléver, Tuija Jokinen, Tiia Laurial, and Julia Schmale https://doi.org/10.1594/PANGAEA.961131

Carbon dioxide dry air mole fractions measured during MOSAiC 2019/2020 Hélène Angot, Byron Blomquist, Dean Howard, Stephen Archer, Ludovic Bariteau, Ivo Beck, Detlev Helmig, Jacques Hueber, Hans-Werner Jacobi, Tuija Jokinen, Xin Lan, Tiia Laurila, Monica Madronich, Kevin Posman, Lauriane Quéléver, and Julia Schmale https://doi.org/10.1594/PANGAEA.944272

AOS: ambient nephelometer measurements, with calibrations applied at b1-level and above Koontz et al. https://doi.org/10.5439/1228051

Atmospheric snow particle flux in the Central Arctic during MOSAiC 2019-20 M. Frey, D. Wagner, A. Kirchgaessner, T. Uttal, and M. Shupe https://doi.org/10.5285/7d8e401b-2c75-4ee4-a753-c24b7e91e6e9

Sea ice lead fractions from SAR-derived sea ice divergence in the Transpolar Drift during MOSAiC 2019/2020 Luisa von Albedyll https://doi.org/10.1594/PANGAEA.963671

Continuous meteorological surface measurement during POLARSTERN cruise PS122/1 Holger Schmithüsen https://doi.org/10.1594/PANGAEA.935221

Continuous meteorological surface measurement during POLARSTERN cruise PS122/2 Holger Schmithüsen https://doi.org/10.1594/PANGAEA.935222

Continuous meteorological surface measurement during POLARSTERN cruise PS122/3 Holger Schmithüsen https://doi.org/10.1594/PANGAEA.935223

Continuous meteorological surface measurement during POLARSTERN cruise PS122/4 Holger Schmithüsen https://doi.org/10.1594/PANGAEA.935224

Continuous meteorological surface measurement during POLARSTERN cruise PS122/5 Holger Schmithüsen https://doi.org/10.1594/PANGAEA.935225

Benjamin Heutte, Nora Bergner, Hélène Angot, Jakob B. Pernov, Lubna Dada, Jessica A. Mirrielees, Ivo Beck, Andrea Baccarini, Matthew Boyer, Jessie M. Creamean, Kaspar R. Daellenbach, Imad El Haddad, Markus M. Frey, Silvia Henning, Tiaa Laurila, Vaios Moschos, Tuukka Petäjä, Kerri A. Pratt, Lauriane L. J. Quéléver, Matthew D. Shupe, Paul Zieger, Tuija Jokinen, and Julia Schmale

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Short summary
Limited aerosol measurements in the central Arctic hinder our understanding of aerosol-climate interactions in the region. Our year-long observations of aerosol physicochemical properties during the MOSAiC expedition reveal strong seasonal variations in aerosol chemical composition, where the short-term variability is heavily affected by storms in the Arctic. Locally wind-generated particles are shown to be an important source of cloud seeds, especially in autumn.