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Rain-induced soil NOx emission from India during the onset of the summer monsoon: A satellite perspective

Ghude, SD and Lal, DM and Beig, G and Van Der A, R and Sable, D (2010) Rain-induced soil NOx emission from India during the onset of the summer monsoon: A satellite perspective. Journal of Geophysical Research: Atmospheres, 115 (16).

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Rain-induced soil NOx emission in the rural regions in India has been investigated using satellite observations of daily tropospheric NO2 columns from the Ozone Monitoring Instrument (OMI). We selected three rural regions with low population density where industrial and transportation activities are notably less in comparison to other regions of India. We show that OMI-derived tropospheric NO2 columns capture the NOx pulses from soil during the onset of the rainy season (June) over the regions considered in our analysis. Strong enhancements in tropospheric NO2 columns after the active spell of precipitation and subsequent decrease during the break spell have been observed. We argue that this enhancement is due to rain-induced soil NOx pulsing after the onset of summer monsoon rainfall over the dry soil in the study regions. Relating OMI tropospheric NO2 columns to surface NOx emission, soil emission accounts for an average emission flux of ∼23–28 ng N m−1 s−1 during the pulsing event. Lightning is unlikely to account for the enhanced OMI tropospheric NO2 columns over the study regions

Item Type: Article
Additional Information: Copyright of this article belongs to American Geophysical Union
Uncontrolled Keywords: Dry soil; Emission fluxes; Ozone monitoring instruments; Population densities; Pulsing events; Rainy seasons; Rural regions; Satellite observations; Strong enhancement; Summer monsoon; Summer monsoon rainfall; Tropospheric NO, Atmospheric thermodynamics; Ozone; Rain; Soils; Troposphere, Ultraviolet spectrometers, lightning; nitrogen dioxide; precipitation (climatology); rainfall; rural area; satellite imagery; soil emission; soil nitrogen; troposphere, India
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 29 May 2015 09:03
Last Modified: 29 May 2015 09:03

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