Ice nucleating particles in the Canadian High Arctic during the fall of 2018

Jingwei Yun,Melody Fraser,Kevin Rawlings,Sangeeta Sharma,Daniel Veber,W Richard Leaitch,Allan Bertram,Soleil E Worthy,Erin Evoy,Andrew Platt

doi:10.1039/d1ea00068c

Abstract

Our results suggest that a significant source of ice nucleating particles at Alert, Nunavut, during October and November, was likely ice-free and snow-free land at latitudes >50 °N.

Highlights

Mixed-phase clouds, which contain both liquid and ice, are abundant in the Arctic and play an important role in precipitation and climate in this region.[1,2] Ice nucleating particles (INPs) are atmospheric aerosol particles that can initiate the formation of ice in clouds, including mixedphase clouds
We assume that a significant increase in the INP concentration indicates that the samples likely contain mineral dust INPs
To determine if biological INPs were an important component of the INP population, we determined the change in the INP concentrations after heating the samples at 100 °C

Summary

Introduction

Mixed-phase clouds, which contain both liquid and ice, are abundant in the Arctic and play an important role in precipitation and climate in this region.[1,2] Ice nucleating particles (INPs) are atmospheric aerosol particles that can initiate the formation of ice in clouds, including mixedphase clouds. These particles can modify the properties of mixed-phase clouds, including their lifetime and optical properties, by changing the ratio of ice to liquid water in these clouds.[3,4,5,6,7,8]. This decrease in sea ice and land snow may lead to an increase in the INP concentrations in the Artic atmosphere,12–

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Results

Conclusion