Adsorptive uptake of water by semisolid secondary organic aerosols

Aki Pajunoja; Andrew T. Lambe; Jani Hakala; Narges Rastak; Molly J. Cummings; James F. Brogan; Liqing Hao; Mikhail Paramonov; Juan Hong; Nønne L. Prisle; Jussi Malila; Sami Romakkaniemi; Kari E.J. Lehtinen; Ari Laaksonen; Markku Kulmala; Paola Massoli; Timothy B. Onasch; Neil M. Donahue; Ilona Riipinen; Paul Davidovits; Douglas R. Worsnop; Tuukka Petäjä; Annele Virtanen

doi:10.1002/2015GL063142

Adsorptive uptake of water by semisolid secondary organic aerosols

Aki Pajunoja, Andrew T. Lambe, Jani Hakala, Narges Rastak, Molly J. Cummings, James F. Brogan, Liqing Hao, Mikhail Paramonov, Juan Hong, Nønne L. Prisle, Jussi Malila, Sami Romakkaniemi, Kari E.J. Lehtinen, Ari Laaksonen, Markku Kulmala, Paola Massoli, Timothy B. Onasch, Neil M. Donahue, Ilona Riipinen, Paul DavidovitsDouglas R. Worsnop, Tuukka Petäjä, Annele Virtanen

Not published at VTT

Research output: Contribution to journal › Article › Scientific › peer-review

132 Citations (Scopus)

Abstract

Aerosol climate effects are intimately tied to interactions with water. Here we combine hygroscopicity measurements with direct observations about the phase of secondary organic aerosol (SOA) particles to show that water uptake by slightly oxygenated SOA is an adsorption-dominated process under subsaturated conditions, where low solubility inhibits water uptake until the humidity is high enough for dissolution to occur. This reconciles reported discrepancies in previous hygroscopicity closure studies. We demonstrate that the difference in SOA hygroscopic behavior in subsaturated and supersaturated conditions can lead to an effect up to about 30% in the direct aerosol forcing - highlighting the need to implement correct descriptions of these processes in atmospheric models. Obtaining closure across the water saturation point is therefore a critical issue for accurate climate modeling.

Original language	English
Pages (from-to)	3063-3068
Number of pages	6
Journal	Geophysical Research Letters
Volume	42
Issue number	8
DOIs	https://doi.org/10.1002/2015GL063142
Publication status	Published - 28 Apr 2015
MoE publication type	A1 Journal article-refereed

Keywords

adsorption
aerosol
hygroscopicity
SOA
solubility

Access to Document

10.1002/2015GL063142Licence: CC BY-NC-ND

Cite this

Pajunoja, A., Lambe, A. T., Hakala, J., Rastak, N., Cummings, M. J., Brogan, J. F., Hao, L., Paramonov, M., Hong, J., Prisle, N. L., Malila, J., Romakkaniemi, S., Lehtinen, K. E. J., Laaksonen, A., Kulmala, M., Massoli, P., Onasch, T. B., Donahue, N. M., Riipinen, I., ... Virtanen, A. (2015). Adsorptive uptake of water by semisolid secondary organic aerosols. Geophysical Research Letters, 42(8), 3063-3068. https://doi.org/10.1002/2015GL063142

@article{d9b126a683e34663907f45ddd7c19132,

title = "Adsorptive uptake of water by semisolid secondary organic aerosols",

abstract = "Aerosol climate effects are intimately tied to interactions with water. Here we combine hygroscopicity measurements with direct observations about the phase of secondary organic aerosol (SOA) particles to show that water uptake by slightly oxygenated SOA is an adsorption-dominated process under subsaturated conditions, where low solubility inhibits water uptake until the humidity is high enough for dissolution to occur. This reconciles reported discrepancies in previous hygroscopicity closure studies. We demonstrate that the difference in SOA hygroscopic behavior in subsaturated and supersaturated conditions can lead to an effect up to about 30% in the direct aerosol forcing - highlighting the need to implement correct descriptions of these processes in atmospheric models. Obtaining closure across the water saturation point is therefore a critical issue for accurate climate modeling.",

keywords = "adsorption, aerosol, hygroscopicity, SOA, solubility",

author = "Aki Pajunoja and Lambe, {Andrew T.} and Jani Hakala and Narges Rastak and Cummings, {Molly J.} and Brogan, {James F.} and Liqing Hao and Mikhail Paramonov and Juan Hong and Prisle, {N{\o}nne L.} and Jussi Malila and Sami Romakkaniemi and Lehtinen, {Kari E.J.} and Ari Laaksonen and Markku Kulmala and Paola Massoli and Onasch, {Timothy B.} and Donahue, {Neil M.} and Ilona Riipinen and Paul Davidovits and Worsnop, {Douglas R.} and Tuukka Pet{\"a}j{\"a} and Annele Virtanen",

note = "Publisher Copyright: {\textcopyright}2015. The Authors.",

year = "2015",

month = apr,

day = "28",

doi = "10.1002/2015GL063142",

language = "English",

volume = "42",

pages = "3063--3068",

journal = "Geophysical Research Letters",

issn = "0094-8276",

publisher = "Wiley-Blackwell",

number = "8",

}

Pajunoja, A, Lambe, AT, Hakala, J, Rastak, N, Cummings, MJ, Brogan, JF, Hao, L, Paramonov, M, Hong, J, Prisle, NL, Malila, J, Romakkaniemi, S, Lehtinen, KEJ, Laaksonen, A, Kulmala, M, Massoli, P, Onasch, TB, Donahue, NM, Riipinen, I, Davidovits, P, Worsnop, DR, Petäjä, T & Virtanen, A 2015, 'Adsorptive uptake of water by semisolid secondary organic aerosols', Geophysical Research Letters, vol. 42, no. 8, pp. 3063-3068. https://doi.org/10.1002/2015GL063142

TY - JOUR

T1 - Adsorptive uptake of water by semisolid secondary organic aerosols

AU - Pajunoja, Aki

AU - Lambe, Andrew T.

AU - Hakala, Jani

AU - Rastak, Narges

AU - Cummings, Molly J.

AU - Brogan, James F.

AU - Hao, Liqing

AU - Paramonov, Mikhail

AU - Hong, Juan

AU - Prisle, Nønne L.

AU - Malila, Jussi

AU - Romakkaniemi, Sami

AU - Lehtinen, Kari E.J.

AU - Laaksonen, Ari

AU - Kulmala, Markku

AU - Massoli, Paola

AU - Onasch, Timothy B.

AU - Donahue, Neil M.

AU - Riipinen, Ilona

AU - Davidovits, Paul

AU - Worsnop, Douglas R.

AU - Petäjä, Tuukka

AU - Virtanen, Annele

PY - 2015/4/28

Y1 - 2015/4/28

N2 - Aerosol climate effects are intimately tied to interactions with water. Here we combine hygroscopicity measurements with direct observations about the phase of secondary organic aerosol (SOA) particles to show that water uptake by slightly oxygenated SOA is an adsorption-dominated process under subsaturated conditions, where low solubility inhibits water uptake until the humidity is high enough for dissolution to occur. This reconciles reported discrepancies in previous hygroscopicity closure studies. We demonstrate that the difference in SOA hygroscopic behavior in subsaturated and supersaturated conditions can lead to an effect up to about 30% in the direct aerosol forcing - highlighting the need to implement correct descriptions of these processes in atmospheric models. Obtaining closure across the water saturation point is therefore a critical issue for accurate climate modeling.

AB - Aerosol climate effects are intimately tied to interactions with water. Here we combine hygroscopicity measurements with direct observations about the phase of secondary organic aerosol (SOA) particles to show that water uptake by slightly oxygenated SOA is an adsorption-dominated process under subsaturated conditions, where low solubility inhibits water uptake until the humidity is high enough for dissolution to occur. This reconciles reported discrepancies in previous hygroscopicity closure studies. We demonstrate that the difference in SOA hygroscopic behavior in subsaturated and supersaturated conditions can lead to an effect up to about 30% in the direct aerosol forcing - highlighting the need to implement correct descriptions of these processes in atmospheric models. Obtaining closure across the water saturation point is therefore a critical issue for accurate climate modeling.

KW - adsorption

KW - aerosol

KW - hygroscopicity

KW - SOA

KW - solubility

UR - http://www.scopus.com/inward/record.url?scp=84929347185&partnerID=8YFLogxK

U2 - 10.1002/2015GL063142

DO - 10.1002/2015GL063142

M3 - Article

AN - SCOPUS:84929347185

SN - 0094-8276

VL - 42

SP - 3063

EP - 3068

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 8

ER -

Adsorptive uptake of water by semisolid secondary organic aerosols

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this