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Measurements of aerosol size‐resolved hygroscopicity at sub and supermicron sizes
Author(s) -
Hegg D. A.,
Covert D. S.,
Crahan K. K.,
Jonsson H. H.,
Liu Y.
Publication year - 2006
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2006gl026747
Subject(s) - aerosol , materials science , mineralogy , environmental science , particle size , atmospheric sciences , meteorology , chemical engineering , geology , physics , engineering
Airborne measurements of size‐resolved aerosol hygroscopicity are presented using an optical particle counting and sizing technique. The measurement range of 0.25 to 3.5 μ m is significantly greater, and extends to larger sizes, than previous in situ techniques. Preliminary results reveal a peak in aerosol hygroscopicity in the 0.5 –1.5 μ m diameter size range in both marine and polluted aerosols. Geometric growth factors range from 1.3 to 1.5 and 1.1 to 1.3 for the sub and super‐micron particles, respectively.