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| Titel: |
Retrieval of Aerosol Size Index From High-Resolution Spectroradiometer Observations |
| Auteur: |
Pandithurai, G. Devara, P. C. S. Raj, P. E. Sharma, S. |
| Verschenen in: |
Aerosol science and technology |
| Paginering: | Jaargang 26 (1997) nr. 2 pagina's 154-162 |
| Jaar: |
1997 |
| Inhoud: |
Aerosol characteristics over an urban station were studied by utilizing aerosol optical depths at 61 wavelengths in the region 400-700 nm (5-nm interval) obtained with a high spectral resolution radiometer during the period from April 1993 to April 1995 at the Indian Institute of Tropical Meteorology (HTM), Pune (18°32' N, 73°51' E, 559-m AMSL), India. The retrieved columnar aerosol size index values are compared with those derived from colocated bistatic argon ion lidar angular scattering measurements. The spectroradiometer-derived size index (daytime) values are found to vary between 2.91 and 4.04, whereas the lidar-derived (nighttime) value is found to vary from 2 to 4.5 during the observational period. The temporal and short-term variations in aerosol size index are presented. The seasonal variation in aerosol size index over the experimental station indicates larger values during winter months and smaller values during pre-monsoon months, which suggests relatively larger-sized particles during pre-monsoon as compared to winter months. The spectroradiometer-derived aerosol optical depths are found to be correlated well (correlation coefficient = 0.75) with the surface-level extinction coefficient. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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