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Related Experiment Video

Updated: Sep 4, 2025

Laser-Induced Fluorescence Emission L.I.F.E. as Novel Non-Invasive Tool for In-Situ Measurements of Biomarkers in Cryospheric Habitats

Laser-Induced Fluorescence Emission L.I.F.E. as Novel Non-Invasive Tool for In-Situ Measurements of Biomarkers in Cryospheric Habitats

Published on: October 26, 2019

Highly Active Ice-Nucleating Particles at the Summer North Pole.

Grace C E Porter^1,2, Michael P Adams¹, Ian M Brooks¹

¹School of Earth and Environment University of Leeds Leeds UK.

Journal of Geophysical Research. Atmospheres : JGR

|July 22, 2022

Summary

This summary is machine-generated.

High concentrations of biological ice-nucleating particles (INPs) were found at the North Pole during summer 2018. These INPs, active above -20°C, were sometimes as high as those at mid-latitudes.

Keywords:

Arctic ice ice‐nucleating particles mixed‐phase clouds

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LabVIEW-operated Novel Nanoliter Osmometer for Ice Binding Protein Investigations

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Published on: February 4, 2013

Area of Science:

Atmospheric Science
Cloud Physics
Climate Science

Background:

Ice and supercooled water balance in clouds impacts radiative properties and climate feedbacks.
Ice-nucleating particle (INP) concentrations are typically low in remote marine regions, promoting supercooled water.
Arctic INP concentrations were expected to be low due to remoteness and scavenging, but this study reveals otherwise.

Purpose of the Study:

To investigate the concentration and sources of ice-nucleating particles (INPs) at the North Pole during summer.
To determine if INP concentrations differ between the surface and the boundary layer where clouds form.
To identify potential sources of INPs influencing Arctic cloud formation.

Main Methods:

Field measurements of INP concentrations at the North Pole during summer 2018.
Utilized a balloon-borne sampler to assess INP concentrations at different altitudes.
Employed back trajectory analysis to identify potential INP source regions.

Main Results:

Sporadic high concentrations of biological INPs (active > -20°C) were observed at the North Pole.
INP concentrations sometimes matched those found at mid-latitudes, contrasting sharply with Southern Ocean findings.
INP concentrations varied significantly between the surface and the cloud-forming boundary layer.
Back trajectory analysis indicated the Russian coast as a likely source of INPs, possibly from sea spray, not from pack ice or open leads.

Conclusions:

The North Pole can experience high biological INP concentrations, influencing Arctic cloud properties.
Arctic primary ice production is sensitive to INP transport from coastal regions like the Russian coast.
Climate change impacts on source regions may significantly affect Arctic climate through altered INP transport.