Global organic and inorganic aerosol hygroscopicity and its effect on radiative forcing

被引：0

作者：

Mira L. Pöhlker

Christopher Pöhlker

Johannes Quaas

Johannes Mülmenstädt

Andrea Pozzer

Meinrat O. Andreae

Paulo Artaxo

Karoline Block

Hugh Coe

Barbara Ervens

Peter Gallimore

Cassandra J. Gaston

Sachin S. Gunthe

Silvia Henning

Hartmut Herrmann

Ovid O. Krüger

Gordon McFiggans

Laurent Poulain

Subha S. Raj

Ernesto Reyes-Villegas

Haley M. Royer

David Walter

Yuan Wang

Ulrich Pöschl

机构：

[1] Max Planck Institute for Chemistry,Multiphase Chemistry Department

[2] Leipzig University,Faculty of Physics and Earth Sciences, Leipzig Institute for Meteorology

[3] Leibniz Institute for Tropospheric Research,Atmospheric Microphysics Department

[4] Max Planck Institute for Chemistry,Atmospheric Chemistry Department

[5] The Cyprus Institute,Climate and Atmosphere Research Center

[6] Max Planck Institute for Chemistry,Biogeochemistry Department

[7] University of California San Diego,Scripps Institution of Oceanography

[8] Universidade de São Paulo,Instituto de Física

[9] University of Manchester,Department of Earth and Environmental Sciences, School of Natural Sciences

[10] Université Clermont Auvergne,Department of Atmospheric Sciences, Rosenstiel School of Marine and Atmospheric Science

[11] CNRS,Environmental Engineering Division, Department of Civil Engineering

[12] Institut de Chimie de Clermont-Ferrand,Center for Atmospheric and Climate Sciences

[13] University of Miami,Atmospheric Chemistry Department

[14] Indian Institute of Technology Madras,Climate Geochemistry Department

[15] Indian Institute of Technology Madras,Collaborative Innovation Center for Western Ecological Safety

[16] Leibniz-Institute for Tropospheric Research,School of Engineering and Sciences

[17] Max Planck Institute for Chemistry,undefined

[18] Lanzhou University,undefined

[19] Pacific Northwest National Laboratory,undefined

[20] Tecnologico de Monterrey,undefined

来源：

Nature Communications | / 14卷

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摘要：

The climate effects of atmospheric aerosol particles serving as cloud condensation nuclei (CCN) depend on chemical composition and hygroscopicity, which are highly variable on spatial and temporal scales. Here we present global CCN measurements, covering diverse environments from pristine to highly polluted conditions. We show that the effective aerosol hygroscopicity, κ, can be derived accurately from the fine aerosol mass fractions of organic particulate matter (ϵorg) and inorganic ions (ϵinorg) through a linear combination, κ = ϵorg ⋅ κorg + ϵinorg ⋅ κinorg. In spite of the chemical complexity of organic matter, its hygroscopicity is well captured and represented by a global average value of κorg = 0.12 ± 0.02 with κinorg = 0.63 ± 0.01 as the corresponding value for inorganic ions. By showing that the sensitivity of global climate forcing to changes in κorg and κinorg is small, we constrain a critically important aspect of global climate modelling.

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