Potential Effect of Halogens on Atmospheric Oxidation and Air Quality in China

Li, Qinyi; Badía, Alba; Wang, Tao; Sarwar, Golam; Fu, Xiao; Zhang, Li; Zhang, Qiang; Fung, Jimmy Chi Hung; Cuevas, Carlos A.; Wang, Shanshan; Zhou, Bin; Saiz‐Lopez, Alfonso

doi:10.1029/2019jd032058

Cited by 38 publications

(56 citation statements)

References 105 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More discussion of the mechanisms for ozone increase is in Text S6 (He et al, 2017; Jin & Holloway, 2015; Li et al, 2018; Lu et al, 2019; Wang et al, 2017). It is worth noting that recent findings suggest halogen chemistry (not included in our model) could to some extent affect the responses of oxidants to NO x reductions (Li, Badia, et al, 2020; Saiz‐Lopez & von Glasow, 2012; Simpson et al, 2015), but should not change our conclusion regarding the trends of oxidants (see more in Text S7) (Chen et al, 2017, 2018; Fu et al, 2018; Jin & Chu, 2006; Li, Badia, et al, 2020; Liu & Abbatt, 2020; Sarwar et al, 2007; Wang et al, 2016; Wang, Chen, et al, 2019; Wang, Jacob, et al, 2019; Xing et al, 2019; Yarwood et al, 2010).…”

Section: Resultsmentioning

confidence: 99%

Wintertime Particulate Matter Decrease Buffered by Unfavorable Chemical Processes Despite Emissions Reductions in China

Leung

Shi

Zhao

et al. 2020

Geophysical Research Letters

View full text Add to dashboard Cite

Extreme and persistent haze events frequently occur during wintertime China. While recent emissions reductions reduced annual mean fine particulate matter (PM2.5) concentrations over eastern China, their effectiveness on wintertime PM2.5 trend remains uncertain. We use observations and model simulations to quantify seasonal differences in PM2.5 trends and investigate the underlying chemical mechanisms driving such differences. We find a much slower decrease in observed wintertime PM2.5 (−3.2% yr−1) since 2014, in contrast to a drastic summertime decrease (−10.3% yr−1). Simulations show two previously underappreciated mechanisms buffering wintertime PM2.5 decrease, including an increase in oxidation capacity due to nitrogen oxides (NOx) reductions under wintertime volatile organic compound (VOC)‐limited chemistry, and an enhanced conversion of nitric acid to nitrate by ammonia due to sulfur dioxide reductions. Our findings suggest that control policies targeting VOC and deep NOx reductions are needed to improve wintertime PM2.5 air quality over China.

show abstract

Section: Resultsmentioning

confidence: 99%

Wintertime Particulate Matter Decrease Buffered by Unfavorable Chemical Processes Despite Emissions Reductions in China

Leung

Shi

Zhao

et al. 2020

Geophysical Research Letters

View full text Add to dashboard Cite

show abstract

“…More modeling has focused on the regional impacts of Cl and ClONO 2 (see Section 5.1). Accounting for the chemistry associated with these molecules can lead to increases of 3%-5% in surface ozone in the United States (Sarwar et al, 2012) and significant regional enhancements elsewhere in the NH, particularly over China (Sarwar et al, 2014;Li et al, 2020), with smaller increases over Europe (Sherwen et al, 2017b).…”

Section: Cycle 1 (R17mentioning

confidence: 99%

Tropospheric Ozone Assessment Report

Archibald

Neu

Elshorbany

et al. 2020

Elementa: Science of the Anthropocene

View full text Add to dashboard Cite

Our understanding of the processes that control the burden and budget of tropospheric ozone has changed dramatically over the last 60 years. Models are the key tools used to understand these changes, and these underscore that there are many processes important in controlling the tropospheric ozone budget. In this critical review, we assess our evolving understanding of these processes, both physical and chemical. We review model simulations from the International Global Atmospheric Chemistry Atmospheric Chemistry and Climate Model Intercomparison Project and Chemistry Climate Modelling Initiative to assess the changes in the tropospheric ozone burden and its budget from 1850 to 2010. Analysis of these data indicates that there has been significant growth in the ozone burden from 1850 to 2000 (approximately 43 ± 9%) but smaller growth between 1960 and 2000 (approximately 16 ± 10%) and that the models simulate burdens of ozone well within recent satellite estimates. The Chemistry Climate Modelling Initiative model ozone budgets indicate that the net chemical production of ozone in the troposphere plateaued in the 1990s and has not changed since then inspite of increases in the burden. There has been a shift in net ozone production in the troposphere being greatest in the northern mid and high latitudes to the northern tropics, driven by the regional evolution of precursor emissions. An analysis of the evolution of tropospheric ozone through the 21st century, as simulated by Climate Model Intercomparison Project Phase 5 models, reveals a large source of uncertainty associated with models themselves (i.e., in the way that they simulate the chemical and physical processes that control tropospheric ozone). This structural uncertainty is greatest in the near term (two to three decades), but emissions scenarios dominate uncertainty in the longer term (2050–2100) evolution of tropospheric ozone. This intrinsic model uncertainty prevents robust predictions of near-term changes in the tropospheric ozone burden, and we review how progress can be made to reduce this limitation.

show abstract

“…Sarwar et al (2019) conducted a year-long simulation in 2006 of CMAQ and reported a decrease of 25% over oceanic waters and >6 ppbv in the present study domain. Li, Badia, Wang, et al (2020) employed the WRF-Chem model to report 4%-10% reduction in surface O 3 along the coast in summer 2018 due to the addition of halogen sources and chemistry in China.…”

Section: 1029/2020jd034175mentioning

confidence: 99%

“…A follow-up work by Stone et al (2018) found an increase of OH (∼2%) and a decrease of HO 2 (-5% to -2%) for the year 2009 in East Asia. Li, Badia, Wang, et al (2020) utilized the WRF-Chem model in China and reported changes of OH and HO 2 in between -10% and 20% in summer 2018 along the coast. Note that Li, Badia, Wang, et al (2020) included anthropogenic chlorine emission over land for their simulation, which led to an increase of both OH and HO 2 in polluted coastal regions.…”

Section: Impact Of Halogens On Free Radicalsmentioning

confidence: 99%

“…Li, Badia, Wang, et al (2020) utilized the WRF-Chem model in China and reported changes of OH and HO 2 in between -10% and 20% in summer 2018 along the coast. Note that Li, Badia, Wang, et al (2020) included anthropogenic chlorine emission over land for their simulation, which led to an increase of both OH and HO 2 in polluted coastal regions. Muñiz-Unamunzaga et al (2018) used CMAQ model in Los Angeles and found a large decrease (-50% to -20%) in the NO 3 radical in September 2006 due to halogens and dimethyl sulfide chemistry.…”

Section: Impact Of Halogens On Free Radicalsmentioning

confidence: 99%

See 1 more Smart Citation

Chemical Interactions Between Ship‐Originated Air Pollutants and Ocean‐Emitted Halogens

Badía

Fernández

et al. 2021

JGR Atmospheres

Self Cite

View full text Add to dashboard Cite

Shipment is the dominant method for redistributing products from one continent to another and is critical in sustaining the world's economy. Shipping activities result in emissions of air pollutants over natural waters and contribute approximately 15% of the NO x emissions and 13% of the SO x emissions on a global scale (IMO, 2014; Kontovas, 2020). Ship-originated air pollutants (primary emissions and their secondary products) have been reported to affect the atmospheric composition, air quality, and human health. A pioneering study by Lawrence and Crutzen (1999) revealed that ship emissions reshape atmospheric chemistry in the marine boundary layer (MBL). Eyring et al. (2010) reported that ship emissions of air pollutants caused air quality problems with elevated nitrogen oxides, sulfur, particulate matter, and ground-level ozone (O 3) in coastal areas and harbors. Fan et al. (2016) and Lv et al. (2018) also suggested that ship emissions have a noticeable influence on air quality in East China and East Asia, respectively. The reduced air quality due to ship emissions can lead to adverse health impacts with 14,500-37,500 worldwide premature deaths per year (H. Liu et al., 2016). Ship emissions affect climate via their effects on greenhouse gases (CO 2 , CH 4 , and O 3) and cloud condensation nuclei (Von Schneidemesser et al., 2015). Ship emissions also change marine stratocumulus regime of open cells into closed cells inducing negative radiative forcing (Y.-C. Chen et al., 2012; Goren & Rosenfeld, 2012). The budget of reactive halogen species (RHS) can also be influenced by shipping emissions. Osthoff et al. (2008) reported the first ambient measurement of ClNO 2 , an important reservoir of reactive chlorine,

show abstract

Potential Effect of Halogens on Atmospheric Oxidation and Air Quality in China

Cited by 38 publications

References 105 publications

Wintertime Particulate Matter Decrease Buffered by Unfavorable Chemical Processes Despite Emissions Reductions in China

Wintertime Particulate Matter Decrease Buffered by Unfavorable Chemical Processes Despite Emissions Reductions in China

Tropospheric Ozone Assessment Report

Chemical Interactions Between Ship‐Originated Air Pollutants and Ocean‐Emitted Halogens

Contact Info

Product

Resources

About