Aerosol Chemical Composition in Cloud Events by High Resolution Time-of-Flight Aerosol Mass Spectrometry. Hao, L., Q., Romakkaniemi, S., Kortelainen, A., Jaatinen, A., Portin, H., Miettinen, P., Komppula, M., Leskinen, A., Virtanen, A., Smith, J., N., Sueper, D., Worsnop, D., R., Lehtinen, K., E., J., & Laaksonen, A. Environmental Science and Technology, 47(6):2645-2653, 2013.
doi  abstract   bibtex   
This study presents results of direct observations of aerosol chemical composition in clouds. A high-resolution time-of-flight aerosol mass spectrometer was used to make measurements of cloud interstitial particles (INT) and mixed cloud interstitial and droplet residual particles (TOT). The differences between these two are the cloud droplet residuals (RES). Positive matrix factorization analysis of high-resolution mass spectral data sets and theoretical calculations were performed to yield distributions of chemical composition of the INT and RES particles. We observed that less oxidized hydrocarbon-like organic aerosols (HOA) were mainly distributed into the INT particles, whereas more oxidized low-volatile oxygenated OA (LVOOA) mainly in the RES particles. Nitrates existed as organic nitrate and in chemical form of NH4NO3. Organic nitrates nitrates in the INT particles, in clear contrast to 26% in the RES particles. Meanwhile, sulfates coexist in forms of acidic NH4HSO4 and neutralized (NH4)(2)SO4. Acidic sulfate made up 64.8% of total sulfates in the INT particles, much higher than 10.7% in the RES particles. The results indicate a possible joint effect of activation ability of aerosol particles, cloud processing, and particle size effects on cloud formation.
@article{
 title = {Aerosol Chemical Composition in Cloud Events by High Resolution Time-of-Flight Aerosol Mass Spectrometry},
 type = {article},
 year = {2013},
 pages = {2645-2653},
 volume = {47},
 id = {a64f9476-c5ef-31af-b795-83fa5eb7bf51},
 created = {2023-01-31T22:46:07.627Z},
 file_attached = {false},
 profile_id = {2e2b0bf1-6573-3fd8-8628-55d1dc39fe31},
 last_modified = {2023-01-31T22:46:07.627Z},
 read = {false},
 starred = {false},
 authored = {true},
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 citation_key = {Hao2013a},
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 notes = {<b>From Duplicate 1 (<i>Aerosol Chemical Composition in Cloud Events by High Resolution Time-of-Flight Aerosol Mass Spectrometry</i> - Hao, L Q; Romakkaniemi, S; Kortelainen, A; Jaatinen, A; Portin, H; Miettinen, P; Komppula, M; Leskinen, A; Virtanen, A; Smith, J N; Sueper, D; Worsnop, D R; Lehtinen, K E J; Laaksonen, A)<br/></b><br/>Times Cited: 2<br/>Hao, Liqing Romakkaniemi, Sami Kortelainen, Aki Jaatinen, Antti Portin, Harri Miettinen, Pasi Komppula, Mika Leskinen, Ari Virtanen, Annele Smith, James N. Sueper, Donna Worsnop, Douglas R. Lehtinen, Karl E. J. Laaksonen, Ari},
 private_publication = {false},
 abstract = {This study presents results of direct observations of aerosol chemical composition in clouds. A high-resolution time-of-flight aerosol mass spectrometer was used to make measurements of cloud interstitial particles (INT) and mixed cloud interstitial and droplet residual particles (TOT). The differences between these two are the cloud droplet residuals (RES). Positive matrix factorization analysis of high-resolution mass spectral data sets and theoretical calculations were performed to yield distributions of chemical composition of the INT and RES particles. We observed that less oxidized hydrocarbon-like organic aerosols (HOA) were mainly distributed into the INT particles, whereas more oxidized low-volatile oxygenated OA (LVOOA) mainly in the RES particles. Nitrates existed as organic nitrate and in chemical form of NH4NO3. Organic nitrates nitrates in the INT particles, in clear contrast to 26% in the RES particles. Meanwhile, sulfates coexist in forms of acidic NH4HSO4 and neutralized (NH4)(2)SO4. Acidic sulfate made up 64.8% of total sulfates in the INT particles, much higher than 10.7% in the RES particles. The results indicate a possible joint effect of activation ability of aerosol particles, cloud processing, and particle size effects on cloud formation.},
 bibtype = {article},
 author = {Hao, Liqing Q and Romakkaniemi, Sami and Kortelainen, Aki and Jaatinen, Antti and Portin, Harri and Miettinen, Pasi and Komppula, Mika and Leskinen, Ari and Virtanen, Annele and Smith, James N. and Sueper, Donna and Worsnop, Douglas R. and Lehtinen, Kari E.J. J and Laaksonen, Ari},
 doi = {10.1021/es302889w},
 journal = {Environmental Science and Technology},
 number = {6}
}

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