 |
| Titel |
Measurements of aerosol intensive properties over Visakhapatnam, India for 2007 |
| VerfasserIn |
K. Niranjan, B. Spandana, T. Anjana Devi, V. Sreekanth, B. L. Madhavan |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
0992-7689
|
| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 29, no. 6 ; Nr. 29, no. 6 (2011-06-10), S.973-985 |
| Datensatznummer |
250017031
|
| Publikation (Nr.) |
 copernicus.org/angeo-29-973-2011.pdf |
|
|
|
|
|
| Zusammenfassung |
| Information on the aerosol intensive properties like Single Scattering
Albedo (SSA) and asymmetry parameter are very limited, particularly over the
peninsular India, though extensive reports are available on the aerosol bulk
properties. In view of the importance of these parameters in evaluating the
aerosol radiative forcing, we present for the first time the temporal
variation in SSA with measurements on aerosol absorption and scattering
coefficients over Visakhapatnam (17.72° N, 83.32° E; located on the east coast of India) for the year 2007. The inferred SSA was in the range of 0.65
and 0.9 with an annual mean of 0.76 ± 0.013 and with a probable
value of 0.80, indicating a marginal atmospheric warming over the region.
The mixed layer contribution to column Aerosol Optical depth is found to be
35 % in summer while it is well above 35 % in winter, indicating the
confinement of aerosol within the boundary layer during winter. The
asymmetry parameter which represents the angular scattering in radiative
forcing estimation is found to be around 0.65 ± 0.1 for the
location. The day to day variability in SSA is found to be well correlated
with the variations in surface BC mass concentrations and/or the relative
dominance of the fine/coarse mode aerosol. The results are discussed in
light of the aerosol physical and optical properties and the asymmetry
parameter. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|