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- Title
Seasonal Variation of Sulphate Aerosols and its Optical Properties Over Karachi During 2018.
- Authors
Ali, Ashraf; Mahmood, Khalid; Sadef, Yumma; Shahid, Muhammad Zeeshaan; Ahmad, Sajid Rashid
- Abstract
Seasonal variation of sulphate aerosols along with its optieal properties and its dependenee upon meteorologieal parameters are studied over Karaehi, Pakistan during 2018by using Giovanni data, where MEERA-2 analysis has been performed using OpenGrADS. Analysis of results showed that mass eoneentration (5-13 pg/m3) and eolumn density (19-24.5 mg/m2) of sulphate aerosol and its extinetion faetor (0.18) is high in winter and autumn seasons showing dependenee on biomass burning and fossil fuel eombustion in the industrial seetor. Low preeipitation and wind speed favour the aeeumulation of pollutants and their transport from Nawabshah and Hyderabad to Karaehi. On the other hand, in summer and spring low biomass burning, small retention time due to frequent preeipitation, eausing washing of air and reversal of wind direetion are all the faetors preventing the aeeumulation of pollutants in the area. This eause a deerease in the mass eoneentration (1.9-3 pg/m3), density (9.8-13 mg/m2) and extinetion faetor (0.06) of sulphate aerosols in the troposphere.
- Subjects
KARACHI (Pakistan); PAKISTAN; HYDERABAD (Pakistan); AEROSOLS; OPTICAL properties; BIOMASS burning; SULFATES; SPRING; TROPOSPHERIC aerosols; CARBONACEOUS aerosols
- Publication
Pakistan Journal of Scientific & Industrial Research Series A: Physical Sciences, 2023, Vol 66, Issue 1, p23
- ISSN
2221-6413
- Publication type
Article