Determining the Abundance, Variability, Sources and Predictability of IceNucleating Particles in the Arctic ...

The frequency and distribution of the ice phase in mixed-phase clouds (MPCs) influence the Earth’s energy budget by determining the clouds’ radiative properties and lifetime. The presence of ice-nucleating particles (INPs), a unique fraction of atmospheric aerosols, is vital to trigger the primary f...

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Bibliographic Details
Main Author: Li, Guangyu
Format: Text
Language:English
Published: ETH Zurich 2023
Subjects:
Arctic amplification
ice nucleating particles
Cloud microphysics
Climate change
infoeu-repo/classification/ddc/550
infoeu-repo/classification/ddc/500
Earth sciences
Natural sciences
FOS Natural sciences
Arctic
Online Access:https://dx.doi.org/10.3929/ethz-b-000605091
http://hdl.handle.net/20.500.11850/605091
Description
Summary:The frequency and distribution of the ice phase in mixed-phase clouds (MPCs) influence the Earth’s energy budget by determining the clouds’ radiative properties and lifetime. The presence of ice-nucleating particles (INPs), a unique fraction of atmospheric aerosols, is vital to trigger the primary formation of ice crystals in MPCs by lowering the energy barrier during the phase transition. Despite the extraordinary scarcity of atmospheric INPs, their role in cloud-phase feedback to climate is indispensable, particularly in the Arctic, where the climate is experiencing accelerated warming (i.e., Arctic amplification). However, unconstrained representations of complex interactions between clouds and aerosols in climate models induce substantial uncertainties in the cloud-phase feedback. These uncertainties are largely hindered by insufficient knowledge on the abundance, variability, properties, sources and predictability of atmospheric INPs. The principal objective of this dissertation is to narrow this ...

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