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Volume 8, Issue 9 (Suppl) J Earth Sci Clim Change
ISSN: 2157-7617 JESCC, an open access journal Climate Congress 2017
October 16-17, 2017
October 16-17, 2017 Dubai, UAE
3rd World Congress on
Climate Change and Global Warming
Monitoring and analysis of formaldehyde concentration over Rawalpindi-Islamabad Pakistan using
MAX-DOAS and satellite observation
Waqas Ahmed Khan
The University of Lahore, Pakistan
Formaldehyde (HCHO) is an intermediate product in the oxidation paths of non-methane hydrocarbons produced through
biogenic activities and anthropogenic sources. Formaldehyde is a flammable, colorless, strong-smelling chemical that is use
to produce numerous domestic products and medical preservatives. Formaldehyde is also present naturally in the environment
and produced in lesser amounts by most organisms as part of normal metabolic processes. Pakistan lacks the monitoring
facilities on a larger scale to measure the atmospheric gasses on regular basis. The study presents the result of atmospheric
Formaldehyde vertical column densities (VCDs) obtained from ground-based and satellite observations over Pakistan during
the time period of 2014-2015. In order to explore the spatial distribution of Formaldehyde, various field campaigns were
conducted by using Car MAX-DOAS instrument in which international scientists were also involved. Level 2 data product
of satellite; Ozone Monitoring Instrument (OMI) retrieved by differential optical absorption spectroscopy (DOAS) technique
was also compared with ground-based observations. Spatio-temporal distribution of Formaldehyde (HCHO) column densities
over main cities and region of Pakistan are discussed. The results show that high Formaldehyde (HCHO) column densities 108
ppm exceeding permissible limit of WHO 83 ppm, were found over twin cities Rawalpindi-Islamabad of Pakistan. The highest
VCDs were around 1.0×1016 to 8.5 ×1016 molecules/cm2 higher than WHO guide lines, while in Pir-Sohawa valley where
there is less population and vehicular emission; HCHO VCDs were found withinWHO permissible limits. Similarly, areas with
major industrial activity and high population densities showed high amount of HCHO concentrations.
Biography
Waqas Ahmed khan is serving as a lecturer in University of Lahore, Pakistan in the department of Environmental sciences.
Waqas Ahmed Khan, J Earth Sci Clim Change 2017, 8:9 (Suppl)
DOI: 10.4172/2157-7617-C1-033