Method to measure the size-resolved real part of aerosol refractive index using differential mobility analyzer in tandem with single-particle soot photometer
<p>Knowledge on the refractive index of ambient aerosols can help reduce the uncertainties in estimating aerosol radiative forcing. A new method is proposed to retrieve the size-resolved real part of the refractive index (RRI). The main principle of deriving the RRI is measuring the scattering...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2019-07-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://www.atmos-meas-tech.net/12/3541/2019/amt-12-3541-2019.pdf |
| Summary: | <p>Knowledge on the refractive index of ambient aerosols can help reduce the
uncertainties in estimating aerosol radiative forcing. A new method is
proposed to retrieve the size-resolved real part of the refractive index (RRI).
The main principle of deriving the RRI is measuring the scattering intensity by
a single-particle soot photometer (SP2) of size-selected aerosols. This method is
validated by a series of calibration experiments using the components of
the known RRI. The retrieved size-resolved RRI covers a wide range, from 200 to
450 nm, with uncertainty of less than 0.02. Measurements of the size-resolved
RRI can improve the understanding of the aerosol radiative effects.</p> |
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| ISSN: | 1867-1381 1867-8548 |