Research & Teaching Faculty

CNT Parameterization Based on the Observed INP Concentratoin during Arctic Summer Campaigns in a Marine Environment

TitleCNT Parameterization Based on the Observed INP Concentratoin during Arctic Summer Campaigns in a Marine Environment
Publication TypeJournal Article
Year of Publication2020
AuthorsCirisan, A, Girard, E, Blanchet, J-P, Keita, SA, Gong, W, Irish, V, Bertram, AK
JournalATMOSPHERE
Volume11
Issue9
Pagination916
Date PublishedAUG 2020
Abstract

Aerosol–cloud interactions present a large source of uncertainties in atmospheric and climate models. One of the main challenges to simulate ice clouds is to reproduce the right ice nucleating particle concentration. In this study, we derive a parameterization for immersion freezing according to the classical nucleation theory. Our objective was to constrain this parameterization with observations taken over the Canadian Arctic during the Amundsen summer 2014 and 2016 campaigns. We found a linear dependence of contact angle and temperature. Using this approach, we were able to reproduce the scatter in ice nucleated particle concentrations within a factor 5 of observed values with a small negative bias. This parameterization would be easy to implement in climate and atmospheric models, but its representativeness has to first be validated against other datasets.

URLhttps://www.mdpi.com/2073-4433/11/9/916/htm
DOI10.3390/atmos11090916