Abstract
Ambient measurements of aerosol light absorption (σ a ) and scattering coefficients (σ s ) were done at Gosan climate observatory during summer 2008 using a 3-wavelength photoacoustic soot spectrometer (PASS). PASS was deployed photoacoustic method for light absorption and integrated nephelometry for light scattering measurements. The σ a and σ s from PASS were compared with those from co-located aethalometer and nephelometer measurements. The aethalometer measurements of σ a correlated reasonably well with photoacoustic measurements, but the slope of the linear fitting line indicated the PASS measurement values of σa were larger by a factor of 1.53. The nephelometer measurement values of σ s correlated very well with PASS measurements of σ s , with a slope of 1.12 and a small offset. Comparing to the aethalometer measurements, the photoacoustic measurements of σ a didn’t exhibit a significant (i.e., the ratio between aethalometer and PASS increased) change with increasing relative humidity (RH). The ratio of σ s between nephelometer and PASS increased with increasing RH, especially when the RH increased beyond 80%. This apparent increase in σs with RH may be due to the contribution of hygroscopic growth of aerosols.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
