Vertical profiles of carbon monoxide and ozone from MOZAIC aircraft over Delhi, India during 2003–2005

Bhattacharjee, Partha; Singh, Ramesh P.; Nédélec, Philippe

doi:10.1007/s00703-014-0349-x

Cited by 9 publications

(4 citation statements)

References 94 publications

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“…geos-chem.org) in this study. The model includes a detailed mechanism of ozone-NO x -VOC-aerosol tropospheric chemistry Park et al, 2004;Mao et al, 2010Mao et al, , 2013 using the chemical kinetics recommended by Jet Propulsion Laboratory (JPL) and International Union of Pure and Applied Chemistry (IUPAC) (Sander et al, 2011;IU-PAC, 2013), and photolysis rates calculated by the Fast-JX scheme (Bian and Prather, 2002). Stratospheric ozone chemistry is represented by the linearized ozone parameterization (LINOZ) (McLinden et al, 2000), and other stratospheric species are simulated using monthly averaged production and loss rates archived from the Global Modeling Initiative (GMI) model (Murray et al, 2013).…”

Section: Geos-chem Simulationsmentioning

confidence: 99%

“…With the onset of South Asian (East Asian) summer monsoon in May, stronger westerlies (southerlies) bring marine air from Arabian Sea (western Pacific) to the Indian subcontinent (East Asia), leading to significant enhancements of cloud fractions and rainfall (Wang and LinHo, 2002;Ding and Chan, 2005). Decreases of tropospheric ozone with the summer monsoon in South and East Asia have been reported from surface (Lal et al, 2000;Naja and Lal, 2002;Naja et al, 2003;Beig et al, 2007;Reddy et al, 2008;Wang et al, 2009;Kumar et al, 2010;Ding et al, 2013;Hou et al, 2015), ozonesonde (Zhou et al, 2013;Lal et al, 2014;Ojha et al, 2014;Sahu et al, 2014), aircraft measurements (Bhattacharjee et al, 2015;Ding et al, 2008;Srivastava et al, 2015;Ojha et al, 2016), and satellite observations (Liu et al, 2009;Dufour et al, 2010;Safieddine et al, 2016). A number of modeling studies attribute the summertime ozone minimum over India to transport of clean marine air Sahu et al, 2014) or reduced ozone photochemical production (Roy et al, 2008;Kumar et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Lower tropospheric ozone over India and its linkage to the South Asian monsoon

Zhang

Liu

et al. 2018

Atmos. Chem. Phys.

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Abstract. Lower tropospheric (surface to 600 hPa) ozone over India poses serious risks to both human health and crops, and potentially affects global ozone distribution through frequent deep convection in tropical regions. Our current understanding of the processes controlling seasonal and long-term variations in lower tropospheric ozone over this region is rather limited due to spatially and temporally sparse observations. Here we present an integrated process analysis of the seasonal cycle, interannual variability, and long-term trends of lower tropospheric ozone over India and its linkage to the South Asian monsoon using the Ozone Monitoring Instrument (OMI) satellite observations for years 2006–2014 interpreted with a global chemical transport model (GEOS-Chem) simulation for 1990–2010. OMI observed lower tropospheric ozone over India averaged for 2006–2010, showing the highest concentrations (54.1 ppbv) in the pre-summer monsoon season (May) and the lowest concentrations (40.5 ppbv) in the summer monsoon season (August). Process analyses in GEOS-Chem show that hot and dry meteorological conditions and active biomass burning together contribute to 5.8 Tg more ozone being produced in the lower troposphere in India in May than January. The onset of the summer monsoon brings ozone-unfavorable meteorological conditions and strong upward transport, which all lead to large decreases in the lower tropospheric ozone burden. Interannually, we find that both OMI and GEOS-Chem indicate strong positive correlations (r=0.55–0.58) between ozone and surface temperature in pre-summer monsoon seasons, with larger correlations found in high NOx emission regions reflecting NOx-limited production conditions. Summer monsoon seasonal mean ozone levels are strongly controlled by monsoon strengths. Lower ozone concentrations are found in stronger monsoon seasons mainly due to less ozone net chemical production. Furthermore, model simulations over 1990–2010 estimate a mean annual trend of 0.19 ± 0.07 (p value < 0.01) ppbv yr−1 in Indian lower tropospheric ozone over this period, which are mainly driven by increases in anthropogenic emissions with a small contribution (about 7 %) from global methane concentration increases.

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Section: Geos-chem Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lower tropospheric ozone over India and its linkage to the South Asian monsoon

Zhang

Liu

et al. 2018

Atmos. Chem. Phys.

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“…Aircraft emissions of PM 2.5 include soot (Timko et al 2010 ), metals, and other organic and inorganic emerging contaminants (Masiol and Harrison 2014 , Rahim et al 2019 ). Aside from particles, engines exhaust from aircraft produces several toxic gases such as NO x , CO, SO 2 , and other greenhouses gases (Bhattacharjee et al 2015 ; Harrison et al 2015 ). Airborne particles related to commercial aviation have been shown to be emitted predominantly during aircraft takeoff, landing, or idling activities, thus affecting airport regions (Camero 2019 ; Mazaheri et al 2011 ; Vennam et al 2017 ).…”

Section: Introductionmentioning

confidence: 99%

“…A major concern regarding air pollution from airports is the rapid increase of commercial flights every year due to the increased accessibility prior to the COVID-19 pandemic (Bhattacharjee et al 2015 , Chauhan and Singh 2020 , Chauhan and Singh 2021 ). The aviation industry contributes 4% to global warming and 2.4% to CO 2 global emissions (Klöwer et al 2021 ).…”

Section: Introductionmentioning

confidence: 99%

PM2.5 decadal data in cold vs. mild climate airports: COVID-19 era and a call for sustainable air quality policy

Rangel-Alvarado

Pal

Ariya

2022

Environ Sci Pollut Res

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Airports are identified hotspots for air pollution, notably for fine particles (PM 2.5 ) that are pivotal in aerosol-cloud interaction processes of climate change and human health. We herein studied the field observation and statistical analysis of 10-year data of PM 2.5 and selected emitted co-pollutants (CO, NO x , and O 3 ), in the vicinity of three major Canadian airports, with moderate to cold climates. The decadal data analysis indicated that in colder climate airports, pollutants like PM 2.5 and CO accumulate disproportionally to their emissions in fall and winter, in comparison to airports in milder climates. Decadal daily averages and standard errors of PM 2.5 concentrations were as follows: Vancouver, 5.31 ± 0.017; Toronto, 6.71 ± 0.199; and Montreal, 7.52 ± 0.023 μg/m 3 . The smallest and the coldest airport with the least flights/passengers had the highest PM 2.5 concentration. QQQ-ICP-MS/MS and HR-S/TEM analysis of aerosols near Montreal Airport indicated a wide range of emerging contaminants (Cd, Mo, Co, As, Ni, Cr, and Pb) ranging from 0.90 to 622 μg/L, which were also observed in the atmosphere. During the lockdown, a pronounced decrease in the concentrations of PM 2.5 and submicron particles, including nanoparticles , in residential areas close to airports was observed, conforming with the recommended workplace health thresholds (~ 2 × 10 4 cm −3 ), while before the lockdown, condensable particles were up to ~ 1 × 10 5 cm −3 . Targeted reduction of PM 2.5 emission is recommended for cold climate regions. Graphical abstract Supplementary Information The online version contains supplementary material available at 10.1007/s11356-022-19708-8.

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