Vertical distribution of smoke aerosols over upper Indo-Gangetic Plain

K. S. Vinjamuri, Alaa Mhawish, Tirthankar Banerjee, Meytar Sorek-Hamer, David M. Broday, Rajesh K. Mall, Mohd Talib Latif

Research output: Contribution to journalArticle

Abstract

Attenuated backscatter profiles retrieved by the space borne active lidar CALIOP on-board CALIPSO satellite were used to measure the vertical distribution of smoke aerosols and to compare it against the ECMWF planetary boundary layer height (PBLH) over the smoke dominated region of Indo-Gangetic Plain (IGP), South Asia. Initially, the relative abundance of smoke aerosols was investigated considering multiple satellite retrieved aerosol optical properties. Only the upper IGP was selectively considered for CALIPSO retrieval based on prevalence of smoke aerosols. Smoke extinction was found to contribute 2–50% of the total aerosol extinction, with strong seasonal and altitudinal attributes. During winter (DJF), smoke aerosols contribute almost 50% of total aerosol extinction only near to the surface while in post-monsoon (ON) and monsoon (JJAS), relative contribution of smoke aerosols to total extinction was highest at about 8 km height. There was strong diurnal variation in smoke extinction, evident throughout the year, with frequent abundance of smoke particles at lower height (<4 km) during daytime compared to higher height during night (>4 km). Smoke injection height also varied considerably during rice (ON: 0.71 ± 0.65 km) and wheat (AM: 2.34 ± 1.34 km) residue burning period having a significant positive correlation with prevailing PBLH. Partitioning smoke AOD against PBLH into the free troposphere (FT) and boundary layer (BL) yield interesting results. BL contribute 36% (16%) of smoke AOD during daytime (nighttime) and the BL-FT distinction increased particularly at night. There was evidence that despite travelling efficiently to FT, major proportion of smoke AOD (50–80%) continue to remain close to the surface (<3 km) thereby, may have greater implications on regional climate, air quality, smoke transport and AOD-particulate modelling.

Original languageEnglish
Article number113377
JournalEnvironmental Pollution
DOIs
Publication statusAccepted/In press - 1 Jan 2019

Fingerprint

Aerosols
Smoke
Boundary layers
Troposphere
Satellites
Optical radar
Climate
Air quality
Triticum
Optical properties
Air

Keywords

  • Aerosol
  • Boundary layer
  • CALIPSO
  • Geospatial analysis
  • Smoke

ASJC Scopus subject areas

  • Toxicology
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Vinjamuri, K. S., Mhawish, A., Banerjee, T., Sorek-Hamer, M., Broday, D. M., Mall, R. K., & Latif, M. T. (Accepted/In press). Vertical distribution of smoke aerosols over upper Indo-Gangetic Plain. Environmental Pollution, [113377]. https://doi.org/10.1016/j.envpol.2019.113377

Vertical distribution of smoke aerosols over upper Indo-Gangetic Plain. / Vinjamuri, K. S.; Mhawish, Alaa; Banerjee, Tirthankar; Sorek-Hamer, Meytar; Broday, David M.; Mall, Rajesh K.; Latif, Mohd Talib.

In: Environmental Pollution, 01.01.2019.

Research output: Contribution to journalArticle

Vinjamuri KS, Mhawish A, Banerjee T, Sorek-Hamer M, Broday DM, Mall RK et al. Vertical distribution of smoke aerosols over upper Indo-Gangetic Plain. Environmental Pollution. 2019 Jan 1. 113377. https://doi.org/10.1016/j.envpol.2019.113377
Vinjamuri, K. S. ; Mhawish, Alaa ; Banerjee, Tirthankar ; Sorek-Hamer, Meytar ; Broday, David M. ; Mall, Rajesh K. ; Latif, Mohd Talib. / Vertical distribution of smoke aerosols over upper Indo-Gangetic Plain. In: Environmental Pollution. 2019.
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