An updated model-ready emission inventory for Guangdong Province by incorporating big data and mapping onto multiple chemical mechanisms

Huang, Zhijiong; Zhong, Zhuangmin; Sha, Qing’e; Xu, Yuanqian; Zhang, Zhiwei; Wu, Lili; Wang, Yuzheng; Zhang, Lihang; Cui, Xiaozhen; Tang, Ming-Shuang; Shi, Bowen; Zheng, Chuanzeng; Li, Zhen; Hu, Mingming; Bi, Lei; Zheng, Junyu; Yan, Min

doi:10.1016/j.scitotenv.2020.144535

Cited by 48 publications

(48 citation statements)

References 64 publications

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“…It can be clearly seen that there are widely distributed spots with P(H 2 O 2 )/P(HNO 3 ) ratio less than 0.35 over the PRE and the downwind surrounding areas (southern CIR, eastern WCR, and western ECR), suggesting the daytime O 3 -NO x -VOCs sensitivity through these regions is dominated by VOC-limited regime. For these regions, NO x emissions from mobile and industrial sources are much higher than other regions (Huang et al, 2021) while biogenic emissions are relatively low (Figure S8). This feature is in line with the significant contribution from BVOC emissions to O 3 levels, as identified by sensitivity experiments.…”

Section: Role Of O 3 -No X -Vocs Sensitivity In Ozone Formationmentioning

confidence: 99%

Role of Heat Wave‐Induced Biogenic VOC Enhancements in Persistent Ozone Episodes Formation in Pearl River Delta

Wang

Liu

et al. 2021

JGR Atmospheres

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Regional ozone (O3) pollution is influenced by a combination of anthropogenic sources and biogenic volatile organic compounds (BVOC) emitted from vegetation. Under the influence of warming climate and projected expansion of urban green space, O3 pollution may get worse, especially during heat waves (HWs). However, HW‐induced changes in BVOC and subsequent effects on regional O3 pollution have not been adequately assessed. In this study, we used the Weather Research and Forecasting‐Community Multi‐scale Air Quality models to investigate the formation of a typical O3 episode and quantify the O3 response to BVOC in the Pearl River Delta during a HW in 2017. The results showed that the rate of increase of O3 during the HW was 27.1 µg m−3 °C−1, reflecting the rapid O3 formation under high temperature. Compared with the non‐HW (NHW), gas‐phase chemistry and vertical transport were dominant contributors to O3 formation. Sensitivity experiments indicate that the contribution of BVOC to ground‐level O3 formation in Pearl River Delta was up to 42.1 μg m−3 because BVOC emissions in HW were 430 mol d−1 higher than the NHW. Under northerly winds and strong sea‐land breezes, BVOC and oxidation products from rural areas were transported to downwind VOC‐limited regimes and result in severe O3 pollution owing to intense photochemical reactions and accumulated O3 precursors. These findings point to the essential role of BVOC enhancements induced by HWs to O3 formation and suggest the consideration of BVOC emission potential of planted trees in urban greening strategies for avoiding the offset effects from BVOC.

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Section: Role Of O 3 -No X -Vocs Sensitivity In Ozone Formationmentioning

confidence: 99%

Role of Heat Wave‐Induced Biogenic VOC Enhancements in Persistent Ozone Episodes Formation in Pearl River Delta

Wang

Liu

et al. 2021

JGR Atmospheres

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“…In this study, we first used NOx emission rate from a high-resolution emission inventory (Huang et al, 2021) to calculate emission rate of HONO Pemis at night (18:00-6:00). The NOx emission rate was extracted from a 3 km × 3 km grid cell centred around our site.…”

Section: Direct Emissionsmentioning

confidence: 99%

“…Additionally, heterogeneous reactions on different kinds of surfaces have also been found to be possible significant HONO sources, including heterogeneous reactions of NO2 on ground surfaces (Meusel et al, 2016;VandenBoer et al, 2013), building surfaces (Acker et al, 2006;Indarto, 2012), ocean surfaces (Wen et al, 2019;Wojtal et al, 2011;Yang et al, 2021a), soil surfaces (Laufs et al, 2017;Yang et al, 2021b) and vegetation surfaces , etc. Photosensitized reduction reaction of NO2 on organic surfaces (such as humic acids and aromatics) has been considered as an effective pathway to generate HONO (George et al, 2005;Stemmler et al, 2006;Liu et al, 2020a;Ammar et al, 2010;Brigante et al, 2008;Cazoir et al, 2014;Sosedova et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Benefiting from numerous prior field observational studies in the PRD region, our study stands in a strong position to ensure high quality of data acquisition and analysis of HONO, along with a full suite of other chemical species, providing a unique and valuable opportunity to refine our knowledge of HONO sources and sinks, as well as the role of HONO in the photochemistry of O3 and OH in such a region with extensive air pollution as well as rigorous emission control over recent years. A high resolution (3 km × 3 km) NOx emission inventory for the Guangzhou city (Huang et al, 2021) was used to estimate the primary emission rates of NOx and HONO, which would reduce the uncertainty of HONO primary emission rate. By analysing our observational data, both nighttime HONO formation pathways and daytime HONO budgets have been investigated in this study.…”

Section: Introductionmentioning

confidence: 99%

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Budget of nitrous acid (HONO) and its impacts on atmospheric oxidation capacity at an urban site in the fall season of Guangzhou, China

Cheng

et al. 2021

Preprint

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Abstract. Nitrous acid (HONO) can produce hydroxyl radicals (OH) by photolysis and plays an important role in atmospheric photochemistry. Over the years, high concentrations of HONO have been observed in the Pearl River Delta region (PRD) of China, which may be one reason for the elevated atmospheric oxidation capacity. A comprehensive atmospheric observation campaign was conducted at an urban site in Guangzhou from 27 September to 9 November 2018. During the period, HONO was measured from 0.02 to 4.43 ppbv with an average of 0.74 ± 0.70 ppbv. The emission ratios (HONO/NOx) of 0.9 ± 0.4 % were derived from 11 fresh plumes. The primary emission rates of HONO at night were calculated to be between 0.04 ± 0.02 ppbv h−1 and 0.30 ± 0.15 ppbv h−1 based on a high-resolution emission inventory. The HONO formation rate by the homogeneous reaction of OH + NO at night was 0.26 ± 0.08 ppbv h−1, which can be seen as secondary results from primary emission. They were both much higher than the increase rate of HONO (0.02 ppbv h−1) during night. Soil emission rate of HONO at night was calculated to be 0.019 ± 0.001 ppbv h−1. Assuming dry deposition as the dominant removal process of HONO at night, and a deposition velocity of at least ~2.5 cm s−1 is required to balance the direct emissions and OH + NO reaction. Correlation analysis shows that NH3 and relative humidity (RH) may participate in the heterogeneous transformation from NO2 to HONO at night. In the daytime, the average primary emission Pemis was 0.12 ± 0.01 ppbv h−1, and the homogeneous reaction POH + NO was 0.79 ± 0.61 ppbv h−1, larger than the unknown sources PUnknown (0.65 ± 0.46 ppbv h−1). These results suggest primary emissions as a key factor affecting HONO at our site, both during daytime and nighttime. Similar to previous studies, the daytime unknown source of HONO, PUnknown, appeared to be related to the photo-enhanced conversion of NO2. The daytime average OH production rates by photolysis of HONO was 3.7 × 106 cm−3 s−1, lower than that from O1D + H2O at 4.9 × 106 cm−3 s−1. Simulations of OH and O3 with the Master Chemical Mechanism (MCM) box model suggested strong enhancement effect of HONO on OH and O3 by 59 % and 68.8 %, respectively, showing a remarkable contribution of HONO to the atmospheric oxidation in the fall season of Guangzhou.

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“…(http://www.sourceprofile.org.cn/home/article/index/id/24.html)。在 VOCs 成分谱方面，Mo 等人 [38] 构建的 VOCs 成分谱数据库收录了 85 条中国本土源成分能谱，覆盖 5 大类排放源和 75 种常见组分。随着测试手段和分析技术的升级，VOCs 成分谱覆盖的组分数量显著提升。例如，2020 年 Zhou 等人 [39] 建立的四川省 VOCs 成分谱数据集已经覆盖了 519 种组分；Sha 等人 [40] [41] 。水泥、钢铁等一些重点行业发展了基于技术水平和设备信息的排放清单 [36,42,43] 。此外，前期关注较少的溶剂使用行业、机动车蒸发排放、餐饮等污染源也纳入前体物排放清单表征 [43][44][45] 。总体上，现阶段研究已经将污染源分类精细到 4 级源，涵盖超过上百种污染源。例如，清华大学建立的 MEIC(the Multi-resolution Emission Inventory for China )排放清单涵盖超过 700 余种污染源 [46] ；Huang 等人 [43] 建立的广东省排放清单涵盖了约 800 种污染源。…”

Section: 排放源清单表征方法体系unclassified

Status and quality evaluation of precursor emission inventories for PM<sub>2.5</sub> and ozone in China

Huang¹,

Sha²,

Zhu³

et al. 2021

Chin. Sci. Bull.

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An updated model-ready emission inventory for Guangdong Province by incorporating big data and mapping onto multiple chemical mechanisms

Cited by 48 publications

References 64 publications

Role of Heat Wave‐Induced Biogenic VOC Enhancements in Persistent Ozone Episodes Formation in Pearl River Delta

Role of Heat Wave‐Induced Biogenic VOC Enhancements in Persistent Ozone Episodes Formation in Pearl River Delta

Budget of nitrous acid (HONO) and its impacts on atmospheric oxidation capacity at an urban site in the fall season of Guangzhou, China

Status and quality evaluation of precursor emission inventories for PM<sub>2.5</sub> and ozone in China

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An updated model-ready emission inventory for Guangdong Province by incorporating big data and mapping onto multiple chemical mechanisms

Cited by 48 publications

References 64 publications

Role of Heat Wave‐Induced Biogenic VOC Enhancements in Persistent Ozone Episodes Formation in Pearl River Delta

Role of Heat Wave‐Induced Biogenic VOC Enhancements in Persistent Ozone Episodes Formation in Pearl River Delta

Budget of nitrous acid (HONO) and its impacts on atmospheric oxidation capacity at an urban site in the fall season of Guangzhou, China

Status and quality evaluation of precursor emission inventories for PM&lt;sub&gt;2.5&lt;/sub&gt; and ozone in China

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Status and quality evaluation of precursor emission inventories for PM<sub>2.5</sub> and ozone in China