Highly Active Ice-Nucleating Particles at the Summer North Pole

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 location...

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Published in:Journal of Geophysical Research: Atmospheres
Main Authors: Porter, Grace C.E., Adams, Michael P., Brooks, Ian M., Ickes, Luisa, Karlsson, Linn, Leck, Caroline, Salter, Matthew E., Schmale, Julia, Siegel, Karolina, Sikora, Sebastien N.F., Tarn, Mark D., Vüllers, Jutta, Wernli, Heini, Zieger, Paul, Zinke, Julika, Murray, Benjamin J.
Language:unknown
Published: 2022
Subjects:
ice
Online Access:https://doi.org/10.1029/2021JD036059
https://research.chalmers.se/en/publication/529404
id ftchalmersuniv:oai:research.chalmers.se:529404
record_format openpolar
spelling ftchalmersuniv:oai:research.chalmers.se:529404 2023-05-15T14:59:20+02:00 Highly Active Ice-Nucleating Particles at the Summer North Pole Porter, Grace C.E. Adams, Michael P. Brooks, Ian M. Ickes, Luisa Karlsson, Linn Leck, Caroline Salter, Matthew E. Schmale, Julia Siegel, Karolina Sikora, Sebastien N.F. Tarn, Mark D. Vüllers, Jutta Wernli, Heini Zieger, Paul Zinke, Julika Murray, Benjamin J. 2022 text https://doi.org/10.1029/2021JD036059 https://research.chalmers.se/en/publication/529404 unknown http://dx.doi.org/10.1029/2021JD036059 https://research.chalmers.se/en/publication/529404 Meteorology and Atmospheric Sciences Geology Geosciences Multidisciplinary ice-nucleating particles ice Arctic mixed-phase clouds 2022 ftchalmersuniv https://doi.org/10.1029/2021JD036059 2022-12-11T07:18:21Z 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. Other/Unknown Material Arctic Climate change North Pole Southern Ocean Chalmers University of Technology: Chalmers research Arctic North Pole Southern Ocean Journal of Geophysical Research: Atmospheres 127 6
institution Open Polar
collection Chalmers University of Technology: Chalmers research
op_collection_id ftchalmersuniv
language unknown
topic Meteorology and Atmospheric Sciences
Geology
Geosciences
Multidisciplinary
ice-nucleating particles
ice
Arctic
mixed-phase clouds
spellingShingle Meteorology and Atmospheric Sciences
Geology
Geosciences
Multidisciplinary
ice-nucleating particles
ice
Arctic
mixed-phase clouds
Porter, Grace C.E.
Adams, Michael P.
Brooks, Ian M.
Ickes, Luisa
Karlsson, Linn
Leck, Caroline
Salter, Matthew E.
Schmale, Julia
Siegel, Karolina
Sikora, Sebastien N.F.
Tarn, Mark D.
Vüllers, Jutta
Wernli, Heini
Zieger, Paul
Zinke, Julika
Murray, Benjamin J.
Highly Active Ice-Nucleating Particles at the Summer North Pole
topic_facet Meteorology and Atmospheric Sciences
Geology
Geosciences
Multidisciplinary
ice-nucleating particles
ice
Arctic
mixed-phase clouds
description 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.
author Porter, Grace C.E.
Adams, Michael P.
Brooks, Ian M.
Ickes, Luisa
Karlsson, Linn
Leck, Caroline
Salter, Matthew E.
Schmale, Julia
Siegel, Karolina
Sikora, Sebastien N.F.
Tarn, Mark D.
Vüllers, Jutta
Wernli, Heini
Zieger, Paul
Zinke, Julika
Murray, Benjamin J.
author_facet Porter, Grace C.E.
Adams, Michael P.
Brooks, Ian M.
Ickes, Luisa
Karlsson, Linn
Leck, Caroline
Salter, Matthew E.
Schmale, Julia
Siegel, Karolina
Sikora, Sebastien N.F.
Tarn, Mark D.
Vüllers, Jutta
Wernli, Heini
Zieger, Paul
Zinke, Julika
Murray, Benjamin J.
author_sort Porter, Grace C.E.
title Highly Active Ice-Nucleating Particles at the Summer North Pole
title_short Highly Active Ice-Nucleating Particles at the Summer North Pole
title_full Highly Active Ice-Nucleating Particles at the Summer North Pole
title_fullStr Highly Active Ice-Nucleating Particles at the Summer North Pole
title_full_unstemmed Highly Active Ice-Nucleating Particles at the Summer North Pole
title_sort highly active ice-nucleating particles at the summer north pole
publishDate 2022
url https://doi.org/10.1029/2021JD036059
https://research.chalmers.se/en/publication/529404
geographic Arctic
North Pole
Southern Ocean
geographic_facet Arctic
North Pole
Southern Ocean
genre Arctic
Climate change
North Pole
Southern Ocean
genre_facet Arctic
Climate change
North Pole
Southern Ocean
op_relation http://dx.doi.org/10.1029/2021JD036059
https://research.chalmers.se/en/publication/529404
op_doi https://doi.org/10.1029/2021JD036059
container_title Journal of Geophysical Research: Atmospheres
container_volume 127
container_issue 6
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