An aerosol air pollution episode affected by binary typhoons in east and central China

Liu, Weijia; Han, Yongxiang; Yin, Yan; Duan, Jiapeng; Gong, J. C.; Liu, Zhaohuan; Xu, Wandi

doi:10.1016/j.apr.2018.01.005

Cited by 12 publications

(7 citation statements)

References 48 publications

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“…Consequently, air pollution in South Korea may get worse. This is consistent with the mechanism suggested in several previous studies that TC-induced airflow could make air quality worse (Feng et al 2007;Chow et al 2018;Liu et al 2018). As a TC arrives in the SCS, the Rossby waves move westward; hence South Korea is covered by a high pressure anomaly at 0 lag hours, which results in the highest PM 10 concentration.…”

Section: Resultssupporting

confidence: 91%

“…Other studies have shown a more direct effect of TCs on air quality. Generally, air conditions become stable right before a TC reaches a region because of the dominant descending motion surrounding the TC (Feng et al 2007;Chow et al 2018;Liu et al 2018). In some cases, airflow from polluted areas like industrial megacities can become predominant according to the angle from which the TC approaches (Yang et al 2012;Chow et al 2018).…”

Section: Introductionmentioning

confidence: 99%

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Tropical Cyclone as a Possible Remote Controller of Air Quality over South Korea through Poleward-Propagating Rossby Waves

Park

Kim

et al. 2019

Journal of Applied Meteorology and Climatology

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Air quality depends as much on large-scale tropospheric circulation as on the amount of pollutant emissions. Many studies have found a relationship between air quality and midlatitude synoptic weather systems. A stable low-level troposphere and airflow from polluted areas are conditions that favor air pollution in a region. However, few studies have focused on the possible remote effect of tropical cyclone (TC) activity in the tropics on air quality in the midlatitude East Asian countries. Here, we found that TCs in the South China Sea (SCS) can increase the concentration of particulate matter with aerodynamic diameters less than 10 μm (PM10) over South Korea through poleward-propagating Rossby waves. According to our analyses, intense divergence due to a TC causes a barotropic Rossby wave train from the SCS to the North Pacific Ocean. Anomalous highs over the Korean Peninsula (part of the Rossby wave train) result in stable air conditions and cause polluted air inflow to increase the PM10 concentration up to 65 μg m−3. Our finding suggests that TC activity in the tropics should be considered for more accurate forecasts of air quality in South Korea.

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Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Tropical Cyclone as a Possible Remote Controller of Air Quality over South Korea through Poleward-Propagating Rossby Waves

Park

Kim

et al. 2019

Journal of Applied Meteorology and Climatology

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“…The air pollution episodes were recorded three days before each typhoon landed. These results are in agreement with previous studies over the Southeast Asian region where, before the arrival of a typhoon, high air pollution levels are observed at the periphery of the typhoon’s affected area due to the impact of downdrafts, atmospheric circulation field distribution and a high/uniform pressure system at the tropical cyclone front [ 70 , 72 , 73 ]. Under these conditions, it is difficult to obtain good simulation results, whatever emission inventory is used.…”

Section: Wrf-camx System Emissions Comparative Performancesupporting

confidence: 93%

Emission Inventories and Particulate Matter Air Quality Modeling over the Pearl River Delta Region

Lopes

Ferreira

Hoi

et al. 2021

IJERPH

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The Pearl River Delta (PRD) region is located on the southeast coast of mainland China and it is an important economic hub. The high levels of particulate matter (PM) in the atmosphere, however, and poor visibility have become a complex environmental problem for the region. Air quality modeling systems are useful to understand the temporal and spatial distribution of air pollution, making use of atmospheric emission data as inputs. Over the years, several atmospheric emission inventories have been developed for the Asia region. The main purpose of this work is to evaluate the performance of the air quality modeling system for simulating PM concentrations over the PRD using three atmospheric emission inventories (i.e., EDGAR, REAS and MIX) during a winter and a summer period. In general, there is a tendency to underestimate PM levels, but results based on the EDGAR emission inventory show slightly better accuracy. However, improvements in the spatial and temporal disaggregation of emissions are still needed to properly represent PRD air quality. This study’s comparison of the three emission inventories’ data, as well as their PM simulating outcomes, generates recommendations for future improvements to atmospheric emission inventories and our understanding of air pollution problems in the PRD region.

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“…1c). Typhoon influences on atmospheric aerosol, caused by varying factors such as wind speed and precipitation, have been studied in China (Yan et al, 2016;Liu et al, 2018), Korea (Kim et al, 2007), Malaysia (Juneng et al, 2011), the South China Sea (Reid et al, 2015(Reid et al, , 2016b, and Taiwan (Fang et al, 2009;Chang et al, 2011;Lu et al, 2017). The influences of typhoons on biomass burning emissions and transport in the MC have also been examined (Reid et al, 2012;Wang et al, 2013).…”

Section: Mo12 (26-28 September 2018): Impacts Of Typhoon Tramimentioning

confidence: 99%

Long-range aerosol transport and impacts on size-resolved aerosol composition in Metro Manila, Philippines

et al. 2020

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This study analyzes long-range transport of aerosol and aerosol chemical characteristics based on instances of high-and low-aerosol-loading events determined via ground-based size-resolved aerosol measurements collected at the Manila Observatory in Metro Manila, Philippines, from July to October 2018. Multiple data sources, including models, remote sensing, and in situ measurements, are used to analyze the impacts of long-range aerosol transport on Metro Manila and the conditions at the local and synoptic scales facilitating this transport. Through the use of case studies, evidence of long-range transport of biomass burning aerosol and continental emissions is identified in Metro Manila. Long-range transport of biomass burning aerosol from the Maritime Continent, bolstered by southwesterly flow and permitted by low rainfall, was identified through model results and the presence of biomass burning tracers (e.g., K, Rb) in the ground-based measurements. The impacts of emissions transported from continental East Asia on the aerosol characteristics in Metro Manila are also identified; for one of the events analyzed, this transport was facilitated by the nearby passage of a typhoon. Changes in the aerosol size distributions, water-soluble chemical composition, and contributions of various organic aerosol species to the total water-soluble organic aerosol were examined for the different cases. The events impacted by biomass burning transport had the overall highest concentration of water-soluble organic acids, while the events impacted by long-range transport from continental East Asia showed high percent contributions from shorter-chain dicarboxylic acids (i.e., oxalate) that are often representative of photochemical and aqueous processing in the atmosphere. The low-aerosolloading event was subject to a larger precipitation accumulation than the high-aerosol events, indicative of wet scavenging as an aerosol sink in the study region. This low-aerosol event was characterized by a larger relative contribution from supermicrometer aerosols and had a higher percent contribution from longer-chain dicarboxylic acids (i.e., maleate) to the water-soluble organic aerosol fraction, indicating the importance of both primary aerosol emissions and local emissions.

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An aerosol air pollution episode affected by binary typhoons in east and central China

Cited by 12 publications

References 48 publications

Tropical Cyclone as a Possible Remote Controller of Air Quality over South Korea through Poleward-Propagating Rossby Waves

Tropical Cyclone as a Possible Remote Controller of Air Quality over South Korea through Poleward-Propagating Rossby Waves

Emission Inventories and Particulate Matter Air Quality Modeling over the Pearl River Delta Region

Long-range aerosol transport and impacts on size-resolved aerosol composition in Metro Manila, Philippines

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