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  • Porter, Grace C.E.University of Leeds (author)

Highly Active Ice-Nucleating Particles at the Summer North Pole

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • 2022
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:4c761d3d-83bf-464c-b886-f5a18c450524
  • https://research.chalmers.se/publication/529404URI
  • https://doi.org/10.1029/2021JD036059DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-204007URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • The amount of ice versus supercooled water in clouds is important for their radiative properties and role in climate feedbacks. Hence, knowledge of the concentration of ice-nucleating particles (INPs) is needed. Generally, the concentrations of INPs are found to be very low in remote marine locations allowing cloud water to persist in a supercooled state. We had expected the concentrations of INPs at the North Pole to be very low given the distance from open ocean and terrestrial sources coupled with effective wet scavenging processes. Here we show that during summer 2018 (August and September) high concentrations of biological INPs (active at >−20°C) were sporadically present at the North Pole. In fact, INP concentrations were sometimes as high as those recorded at mid-latitude locations strongly impacted by highly active biological INPs, in strong contrast to the Southern Ocean. Furthermore, using a balloon borne sampler we demonstrated that INP concentrations were often different at the surface versus higher in the boundary layer where clouds form. Back trajectory analysis suggests strong sources of INPs near the Russian coast, possibly associated with wind-driven sea spray production, whereas the pack ice, open leads, and the marginal ice zone were not sources of highly active INPs. These findings suggest that primary ice production, and therefore Arctic climate, is sensitive to transport from locations such as the Russian coast that are already experiencing marked climate change.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Adams, Michael P.University of Leeds (author)
  • Brooks, Ian M.University of Leeds (author)
  • Ickes, Luisa,1986Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)ickes (author)
  • Karlsson, LinnStockholms universitet,Institutionen för miljövetenskap,Stockholm University(Swepub:su)lika8029 (author)
  • Leck, CarolineStockholms universitet,Meteorologiska institutionen (MISU),Stockholm University(Swepub:su)leck (author)
  • Salter, Matthew E.Stockholms universitet,Institutionen för miljövetenskap,Stockholm University(Swepub:su)msalt (author)
  • Schmale, JuliaEcole Polytechnique Federale de Lausanne (EPFL),Swiss Federal Institute of Technology in Lausanne (EPFL) (author)
  • Siegel, KarolinaStockholms universitet,Meteorologiska institutionen (MISU),Institutionen för miljövetenskap,Stockholm University(Swepub:su)kase6394 (author)
  • Sikora, Sebastien N.F.University of Leeds (author)
  • Tarn, Mark D.University of Leeds (author)
  • Vüllers, JuttaUniversity of Leeds,Karlsruher Institut für Technologie (KIT),Karlsruhe Institute of Technology (KIT) (author)
  • Wernli, HeiniEidgenössische Technische Hochschule Zürich (ETH),Swiss Federal Institute of Technology in Zürich (ETH) (author)
  • Zieger, PaulStockholms universitet,Institutionen för miljövetenskap,Stockholm University(Swepub:su)pzieg (author)
  • Zinke, JulikaStockholms universitet,Institutionen för miljövetenskap,Stockholm University(Swepub:su)juzi9381 (author)
  • Murray, Benjamin J.University of Leeds (author)
  • University of LeedsChalmers tekniska högskola (creator_code:org_t)

Related titles

  • In:Journal of Geophysical Research: Atmospheres127:62169-89962169-897X

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