Aerosol water parameterisation: A single parameter framework

Swen Metzger, Benedikt Steil, Mohamed Abdelkader, Klaus Klingmüller, Li Xu, Joyce E. Penner, Christos Fountoukis, Athanasios Nenes, Jos Lelieveld

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We introduce a framework to efficiently parameterise the aerosol water uptake for mixtures of semi-volatile and non-volatile compounds, based on the coefficient, vi. This solute-specific coefficient was introduced in Metzger et al. (2012) to accurately parameterise the single solution hygroscopic growth, considering the Kelvin effect - accounting for the water uptake of concentrated nanometer-sized particles up to dilute solutions, i.e. from the compounds relative humidity of deliquescence (RHD) up to supersaturation (Köhler theory). Here we extend the vi parameterisation from single to mixed solutions. We evaluate our framework at various levels of complexity, by considering the full gas-liquid-solid partitioning for a comprehensive comparison with reference calculations using the E-AIM, EQUISOLV II and ISORROPIA II models as well as textbook examples. We apply our parameterisation in the EQuilibrium Simplified Aerosol Model V4 (EQSAM4clim) for climate simulations, implemented in a box model and in the global chemistry-climate model EMAC. Our results show (i) that the vi approach enables one to analytically solve the entire gas-liquid-solid partitioning and the mixed solution water uptake with sufficient accuracy, (ii) that ammonium sulfate mixtures can be solved with a simple method, e.g. pure ammonium nitrate and mixed ammonium nitrate and (iii) that the aerosol optical depth (AOD) simulations are in close agreement with remote sensing observations for the year 2005. Long-term evaluation of the EMAC results based on EQSAM4clim and ISORROPIA II will be presented separately.

Original languageEnglish
Pages (from-to)7213-7237
Number of pages25
JournalAtmospheric Chemistry and Physics
Volume16
Issue number11
DOIs
Publication statusPublished - 10 Jun 2016
Externally publishedYes

Fingerprint

parameterization
water uptake
aerosol
ammonium nitrate
partitioning
water
liquid
textbook
supersaturation
ammonium sulfate
gas
optical depth
simulation
relative humidity
solute
climate modeling
remote sensing
parameter
climate

ASJC Scopus subject areas

  • Atmospheric Science

Cite this

Metzger, S., Steil, B., Abdelkader, M., Klingmüller, K., Xu, L., Penner, J. E., ... Lelieveld, J. (2016). Aerosol water parameterisation: A single parameter framework. Atmospheric Chemistry and Physics, 16(11), 7213-7237. https://doi.org/10.5194/acp-16-7213-2016

Aerosol water parameterisation : A single parameter framework. / Metzger, Swen; Steil, Benedikt; Abdelkader, Mohamed; Klingmüller, Klaus; Xu, Li; Penner, Joyce E.; Fountoukis, Christos; Nenes, Athanasios; Lelieveld, Jos.

In: Atmospheric Chemistry and Physics, Vol. 16, No. 11, 10.06.2016, p. 7213-7237.

Research output: Contribution to journalArticle

Metzger, S, Steil, B, Abdelkader, M, Klingmüller, K, Xu, L, Penner, JE, Fountoukis, C, Nenes, A & Lelieveld, J 2016, 'Aerosol water parameterisation: A single parameter framework', Atmospheric Chemistry and Physics, vol. 16, no. 11, pp. 7213-7237. https://doi.org/10.5194/acp-16-7213-2016
Metzger S, Steil B, Abdelkader M, Klingmüller K, Xu L, Penner JE et al. Aerosol water parameterisation: A single parameter framework. Atmospheric Chemistry and Physics. 2016 Jun 10;16(11):7213-7237. https://doi.org/10.5194/acp-16-7213-2016
Metzger, Swen ; Steil, Benedikt ; Abdelkader, Mohamed ; Klingmüller, Klaus ; Xu, Li ; Penner, Joyce E. ; Fountoukis, Christos ; Nenes, Athanasios ; Lelieveld, Jos. / Aerosol water parameterisation : A single parameter framework. In: Atmospheric Chemistry and Physics. 2016 ; Vol. 16, No. 11. pp. 7213-7237.
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