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פותח על ידי קלירמאש פתרונות בע"מ -
Hygroscopic growth of atmospheric and model humic-like substances
Year:
2007
Authors :
גרבר, אלן
;
.
Volume :
112
Co-Authors:
Dinar, E., Department of Environmental Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
Taraniuk, I., Department of Environmental Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
Graber, E.R., Institute of Soil Water and Environmental Sciences, Volcani Center, A.R.O., Bet Dagan 50250, Israel
Anttila, T., Institute for Tropospheric Chemistry, Research Center Jülich, 52425 Jülich, Germany, Department of Research and Development, Finnish Meteorological Institute, 00101 Helsinki, Finland
Mentel, T.F., Institute for Tropospheric Chemistry, Research Center Jülich, 52425 Jülich, Germany
Rudich, Y., Department of Environmental Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
Facilitators :
From page:
To page:
(
Total pages:
1
)
Abstract:
The hygroscopic growth (HG) of humic-like substances (HULIS) extracted from smoke and pollution aerosol particles and of Suwannee River fulvic acid (SRFA, bulk and fractions of different molecular weight) was measured by humidity tandem differential mobility analyzer (H-TDMA). By characterizing physical and chemical parameters such as molecular weight, elemental composition, and surface tension, we test the effect of these parameters on particle interactions with water vapor. For molecular weight-fractionated SRFA fractions, the growth factor at 90% relative humidity was generally inversely proportional to the molecular weight. HULIS extracts from ambient particles are more hygroscopic than all the SRFA fractions and exhibit different hygroscopic properties depending on their origin and residence time in the atmosphere. The results point out some dissimilarities between SRFA and aerosol-derived HULIS. The cloud condensation nuclei (CCN) behavior of the studied materials was predicted on the basis of hygroscopic growth using a recently introduced approach of Kreidenweis et al. (2005) and compared to CCN activity measurements on the same samples (Dinar et al., 2006). It is found that the computational approach (Kreidenweis et al., 2005) works reasonably well for SRFA fractions but is limited in use for the HULIS extracts from aerosol particles. The difficulties arise from uncertainties associated with HG measurements at high relative humidity, which leads to large errors in the predicted CCN activity. Copyright 2007 by the American Geophysical Union.
Note:
Related Files :
aerosol
Atmospheric aerosols
fractionation
Growth
meteorology
relative humidity
smoke
עוד תגיות
תוכן קשור
More details
DOI :
10.1029/2006JD007442
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
32319
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:08
Scientific Publication
Hygroscopic growth of atmospheric and model humic-like substances
112
Dinar, E., Department of Environmental Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
Taraniuk, I., Department of Environmental Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
Graber, E.R., Institute of Soil Water and Environmental Sciences, Volcani Center, A.R.O., Bet Dagan 50250, Israel
Anttila, T., Institute for Tropospheric Chemistry, Research Center Jülich, 52425 Jülich, Germany, Department of Research and Development, Finnish Meteorological Institute, 00101 Helsinki, Finland
Mentel, T.F., Institute for Tropospheric Chemistry, Research Center Jülich, 52425 Jülich, Germany
Rudich, Y., Department of Environmental Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
Hygroscopic growth of atmospheric and model humic-like substances
The hygroscopic growth (HG) of humic-like substances (HULIS) extracted from smoke and pollution aerosol particles and of Suwannee River fulvic acid (SRFA, bulk and fractions of different molecular weight) was measured by humidity tandem differential mobility analyzer (H-TDMA). By characterizing physical and chemical parameters such as molecular weight, elemental composition, and surface tension, we test the effect of these parameters on particle interactions with water vapor. For molecular weight-fractionated SRFA fractions, the growth factor at 90% relative humidity was generally inversely proportional to the molecular weight. HULIS extracts from ambient particles are more hygroscopic than all the SRFA fractions and exhibit different hygroscopic properties depending on their origin and residence time in the atmosphere. The results point out some dissimilarities between SRFA and aerosol-derived HULIS. The cloud condensation nuclei (CCN) behavior of the studied materials was predicted on the basis of hygroscopic growth using a recently introduced approach of Kreidenweis et al. (2005) and compared to CCN activity measurements on the same samples (Dinar et al., 2006). It is found that the computational approach (Kreidenweis et al., 2005) works reasonably well for SRFA fractions but is limited in use for the HULIS extracts from aerosol particles. The difficulties arise from uncertainties associated with HG measurements at high relative humidity, which leads to large errors in the predicted CCN activity. Copyright 2007 by the American Geophysical Union.
Scientific Publication
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