Tropospheric NO2 Trends over South Asia during the Last Decade (2004–2014) Using OMI Data
The focus of this study is to assess spatiotemporal variability of tropospheric NO2 over South Asia using data from spaceborne OMI during the past decade (2004–2015). We find an average value of NO2 1.0 ± 0.05 × 1015 molec/cm2 and a significant decadal increase of 14%. The elevating NO2 pollution ov...
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| Format: | Article |
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Wiley
2015-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2015/959284 |
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| author | Zia ul-Haq Salman Tariq Muhammad Ali |
| author_facet | Zia ul-Haq Salman Tariq Muhammad Ali |
| author_sort | Zia ul-Haq |
| collection | DOAJ |
| description | The focus of this study is to assess spatiotemporal variability of tropospheric NO2 over South Asia using data from spaceborne OMI during the past decade (2004–2015). We find an average value of NO2 1.0 ± 0.05 × 1015 molec/cm2 and a significant decadal increase of 14%. The elevating NO2 pollution over the region is linked to rise in motor vehicles and industrial and agricultural activities and increase in biomass fuel usage. The observed seasonality of NO2 is associated with change in meteorological conditions and seasonal cycles of anthropogenic emissions. OMI data reveal a seasonal peak in spring followed by winter largely linked to metrological conditions and anthropogenic emissions from crop residue and biomass burning for heating purpose, and low concentration in summer is mostly attributed to meteorological conditions. Significant increase, up to 42%, in NO2 concentrations over northwestern IGB, is observed connected to large scale postmonsoon crop residue events of 2010 and 2012. It is seen that NO2 is mounting over all the hotspot locations and most of the cities. Dhaka shows the highest increase of 77% followed by Islamabad (69%), Kabul (68%), Korba (64%), Bardhaman (47%), and Lahore (40%). On the contrary, DG Khan has shown negative trend of −11%. |
| format | Article |
| id | doaj-art-1e42b284903146b8936a67abdbcabca7 |
| institution | OA Journals |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
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| series | Advances in Meteorology |
| spelling | doaj-art-1e42b284903146b8936a67abdbcabca72025-08-20T02:04:44ZengWileyAdvances in Meteorology1687-93091687-93172015-01-01201510.1155/2015/959284959284Tropospheric NO2 Trends over South Asia during the Last Decade (2004–2014) Using OMI DataZia ul-Haq0Salman Tariq1Muhammad Ali2Remote Sensing and GIS Group, Department of Space Science, University of the Punjab, New Campus, Lahore 54590, PakistanRemote Sensing and GIS Group, Department of Space Science, University of the Punjab, New Campus, Lahore 54590, PakistanRemote Sensing and GIS Group, Department of Space Science, University of the Punjab, New Campus, Lahore 54590, PakistanThe focus of this study is to assess spatiotemporal variability of tropospheric NO2 over South Asia using data from spaceborne OMI during the past decade (2004–2015). We find an average value of NO2 1.0 ± 0.05 × 1015 molec/cm2 and a significant decadal increase of 14%. The elevating NO2 pollution over the region is linked to rise in motor vehicles and industrial and agricultural activities and increase in biomass fuel usage. The observed seasonality of NO2 is associated with change in meteorological conditions and seasonal cycles of anthropogenic emissions. OMI data reveal a seasonal peak in spring followed by winter largely linked to metrological conditions and anthropogenic emissions from crop residue and biomass burning for heating purpose, and low concentration in summer is mostly attributed to meteorological conditions. Significant increase, up to 42%, in NO2 concentrations over northwestern IGB, is observed connected to large scale postmonsoon crop residue events of 2010 and 2012. It is seen that NO2 is mounting over all the hotspot locations and most of the cities. Dhaka shows the highest increase of 77% followed by Islamabad (69%), Kabul (68%), Korba (64%), Bardhaman (47%), and Lahore (40%). On the contrary, DG Khan has shown negative trend of −11%.http://dx.doi.org/10.1155/2015/959284 |
| spellingShingle | Zia ul-Haq Salman Tariq Muhammad Ali Tropospheric NO2 Trends over South Asia during the Last Decade (2004–2014) Using OMI Data Advances in Meteorology |
| title | Tropospheric NO2 Trends over South Asia during the Last Decade (2004–2014) Using OMI Data |
| title_full | Tropospheric NO2 Trends over South Asia during the Last Decade (2004–2014) Using OMI Data |
| title_fullStr | Tropospheric NO2 Trends over South Asia during the Last Decade (2004–2014) Using OMI Data |
| title_full_unstemmed | Tropospheric NO2 Trends over South Asia during the Last Decade (2004–2014) Using OMI Data |
| title_short | Tropospheric NO2 Trends over South Asia during the Last Decade (2004–2014) Using OMI Data |
| title_sort | tropospheric no2 trends over south asia during the last decade 2004 2014 using omi data |
| url | http://dx.doi.org/10.1155/2015/959284 |
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