On some aspects of tropospheric ozone variability over the Indo-Gangetic (IG) basin, India

Kulkarni, Pavan S.; Jain, Srishti; Ghude, Sachin D.; Arya, B. C.; Dubey, P. K.; Shahnawaz,

doi:10.1080/01431160902824993

Cited by 23 publications

(13 citation statements)

References 44 publications

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“…Studies suggest that in the summer monsoon months NOx and ozone concentrations are higher than in winter, and remain higher in those two states than elsewhere (44)(45)(46). This finding may be because of higher temperatures (47) and higher concentrations of NMVOCs from biomass burning (48,49) [traditionally one of the biggest sources of uncertainty in emissions inventories (50)] during the rice growing season.…”

Section: Resultsmentioning

confidence: 84%

Recent climate and air pollution impacts on Indian agriculture

Burney

Ramanathan

2014

Proc. Natl. Acad. Sci. U.S.A.

267

152

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Recent research on the agricultural impacts of climate change has primarily focused on the roles of temperature and precipitation. These studies show that India has already been negatively affected by recent climate trends. However, anthropogenic climate changes are a result of both global emissions of long-lived greenhouse gases (LLGHGs) and other short-lived climate pollutants (SLCPs). Two potent SLCPs, tropospheric ozone and black carbon, have direct effects on crop yields beyond their indirect effects through climate; emissions of black carbon and ozone precursors have risen dramatically in India over the past three decades. Here, to our knowledge for the first time, we present results of the combined effects of climate change and the direct effects of SLCPs on wheat and rice yields in India from 1980 to 2010. Our statistical model suggests that, averaged over India, yields in 2010 were up to 36% lower for wheat than they otherwise would have been, absent climate and pollutant emissions trends, with some densely populated states experiencing 50% relative yield losses. [Our point estimates for rice (−20%) are similarly large, but not statistically significant.] Upper-bound estimates suggest that an overwhelming fraction (90%) of these losses is due to the direct effects of SLCPs. Gains from addressing regional air pollution could thus counter expected future yield losses resulting from direct climate change effects of LLGHGs.climate impacts | ozone | aerosols | agriculture | India

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Section: Resultsmentioning

confidence: 84%

Recent climate and air pollution impacts on Indian agriculture

Burney

Ramanathan

2014

Proc. Natl. Acad. Sci. U.S.A.

267

152

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“…Kar (jayanta.kar@nasa.gov) region with many power plants and industries, and the recent economic growth of India has led to significant increase in industrial emissions (Ghude et al, 2008). As such, the high level of pollution in this region has been the subject of several studies over the last few years using data both from ground based and space based observations as well as models (Jethva et al, 2005;Tripathi et al, 2006;Gautam et al, 2007Gautam et al, , 2009; Beig and Ali, 2006;Roy et al, 2008;Kar et al, 2008Kar et al, , 2009Clarisse et al, 2009;Kulkarni et al, 2009). Fishman et al (2003) had found high tropospheric ozone residual (TOR) along these plains all through the year.…”

Section: Introductionmentioning

confidence: 99%

Wintertime pollution over the Eastern Indo-Gangetic Plains as observed from MOPITT, CALIPSO and tropospheric ozone residual data

et al. 2010

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Abstract.A large wintertime increase in pollutants has been observed over the eastern parts of the Indo Gangetic Plains. We use improved version 4 carbon monoxide (CO) retrievals from the Measurements of Pollution in the Troposphere (MOPITT) along with latest version 3 aerosol data from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) lidar instrument and the tropospheric ozone residual products to characterize this pollution pool. The feature is seen primarily in the lower troposphere from about November to February with strong concomitant increases in CO and aerosol optical depth (AOD). The signature of the feature is also observed in tropospheric ozone column data. The height resolved aerosol data from CALIPSO confirm the trapping of the pollution pool at the lowest altitudes. The observations indicate that MOPITT can capture this low altitude phenomenon even in winter conditions as indicated by the averaging kernels.

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“…This is of great importance since O 3 formed over source regions can then be transported over great distances affecting areas far from the source (Kulkarni et al, 2009;Kulkarni et al, 2011a, b). The build-up of surface O 3 has broad implications on atmospheric chemistry and plays a significant role in controlling the chemical lifetimes and the reaction products of many atmospheric species.…”

Section: Introductionmentioning

confidence: 99%

Surface Ozone Variability and Trend over Urban and Suburban Sites in Portugal

Kulkarni

Bortoli

Domingue

et al. 2016

Aerosol Air Qual. Res.

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The surface ozone time series is analyzed for the seasonal and inter-annual variations and the trend in the following three categories ( (1) original surface ozone time series and of (2) deseasonalized surface ozone time series for all the three data set categories and for all the 8 sites was performed and found to be statistically significant at 6 sites for monthly mean and 8 hr monthly mean and at 5 sites for daily maximum monthly meanusing the non-parametric Mann-Kendall test. The analysis of original surface ozone time series showed a positive trend at 6 out of 8 sites, but the results were not statistically significant for most of the sites due to the presence of the annual cycle masking the actual trend values. However, the analysis of deseasonalized surface ozone time series showed a statistically significant increasing trend at 7 out of 8 sites with high Z values. The positive trends found in the deseasonalized surface ozone time series were in the range 0.44 up to 1.42 µg m -3 year -1 for the monthly mean surface ozone time series (7 stations), 0.33 up to 1.43 µg m -3 year -1 in the case of the 8 hr monthly mean surface ozone time series (7 stations) and 0.66 up to 1.55 µg m -3 year -1 in the daily maximum monthly mean surface ozone time series (6 stations).

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On some aspects of tropospheric ozone variability over the Indo-Gangetic (IG) basin, India

Cited by 23 publications

References 44 publications

Recent climate and air pollution impacts on Indian agriculture

Recent climate and air pollution impacts on Indian agriculture

Wintertime pollution over the Eastern Indo-Gangetic Plains as observed from MOPITT, CALIPSO and tropospheric ozone residual data

Surface Ozone Variability and Trend over Urban and Suburban Sites in Portugal

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