Relationship between fine-mode AOD and precipitation on seasonal and
                        interannual time scales

Jeoung, Hwayoung; Chung, Chien; Noije, Twan van

doi:10.3402/tellusb.v66.23037

Cited by 12 publications

(8 citation statements)

References 51 publications

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“…These pollutants alter the regional climate of downwind areas by altering ambient temperature, cloud properties, and precipitation efficiency (Jeong et al, 2008;Youn et al, 2011;Jeong et al, 2014). They also influence the air quality of downwind areas in urban, ocean, and Arctic regions through long-range atmospheric transport (Carvalho et al, 2011;Quennehe et al, 2012;Schreier et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Impact of Siberian forest fires on the atmosphere over the Korean Peninsula during summer 2014

et al. 2016

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Abstract. Extensive forest fires occurred during late July 2014 across the forested region of Siberia, Russia. Smoke plumes emitted from Siberian forest fires underwent long-range transport over Mongolia and northeast China to the Korean Peninsula, which is located ∼ 3000 km south of the Siberian forest. A notably high aerosol optical depth of ∼ 4 was observed at a wavelength of 500 nm near the source of the Siberian forest fires. Smoke plumes reached 3-5 km in height near the source and fell below 2 km over the Korean Peninsula. Elevated concentrations of levoglucosan were observed (119.7 ± 6.0 ng m −3 ), which were ∼ 4.5 times higher than those observed during non-event periods in July 2014. During the middle of July 2014, a haze episode occurred that was primarily caused by the long-range transport of emission plumes originating from urban and industrial complexes in East China. Sharp increases in SO 2− 4 concentrations (23.1 ± 2.1 µg m −3 ) were observed during this episode. The haze caused by the long-range transport of Siberian forest fire emissions was clearly identified by relatively high organic carbon (OC) / elemental carbon (EC) ratios (7.18 ± 0.2) and OC / SO 2− 4 ratios (1.31 ± 0.07) compared with those of the Chinese haze episode (OC / EC ratio: 2.4 ± 0.4; OC / SO 2− 4 ratio: 0.21 ± 0.05). Remote measurement techniques and chemical analyses of the haze plumes clearly show that the haze episode that occurred during late July 2014 was caused mainly by the long-range transport of smoke plumes emitted from Siberian forest fires.

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Section: Introductionmentioning

confidence: 99%

Impact of Siberian forest fires on the atmosphere over the Korean Peninsula during summer 2014

et al. 2016

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“…Many studies counted haze days based on atmospheric visibility and found that El Niño events could induce more (fewer) winter haze days in northern (southern) China (Gao and Li, 2015;Li et al, 2017). In addition to surface observations, several studies have also analyzed the relationship between ENSO events and aerosol loading based on aerosol optical depth (AOD) data from satellite retrievals (Jeoung et al, 2014;Sun et al, 2018). Jeoung et al (2014) analyzed the combined AOD data of MODIS (Moderate Resolution Imaging Spectroradiometer), MISR (Multi-angle Imaging SpectroRadiometer) and AERONET (AErosol RObotic NETwork) and found that, during the warm phase of ENSO, the fine-mode AOD increased in eastern coastal areas but decreased in some inland areas of China.…”

Section: Introductionmentioning

confidence: 99%

Intensified modulation of winter aerosol pollution in China by El Niño with short duration

et al. 2021

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Abstract. El Niño–Southern Oscillation (ENSO), a phenomenon of periodic changes in sea surface temperature in the equatorial central-eastern Pacific Ocean, is the strongest signal of interannual variability in the climate system with a quasi-period of 2–7 years. El Niño events have been shown to have important influences on meteorological conditions in China. In this study, the impacts of El Niño with different durations on aerosol concentrations and haze days during December–January–February (DJF) in China are quantitatively examined using the state-of-the-art Energy Exascale Earth System Model version 1 (E3SMv1). We find that PM2.5 concentrations are increased by 1–2 µg m−3 in northeastern and southern China and decreased by up to 2.4 µg m−3 in central-eastern China during El Niño events relative to the climatological means. Compared to long-duration (LD) El Niño events, El Niño with short duration (SD) but strong intensity causes northerly wind anomalies over central-eastern China, which is favorable for aerosol dispersion over this region. Moreover, the anomalous southeasterly winds weaken the wintertime prevailing northwesterly in northeastern China and facilitate aerosol transport from southern and southeast Asia, enhancing aerosol increase in northeastern China during SD El Niño events relative to LD El Niño events. In addition, the modulation effect on haze days by SD El Niño events is 2–3 times more than that by LD El Niño events in China. The aerosol variations during El Niño events are mainly controlled by anomalous aerosol accumulation/dispersion and transport due to changes in atmospheric circulation, while El Niño-induced precipitation change has little effect. The occurrence frequency of SD El Niño events has been increasing significantly in recent decades, especially after the 1940s, suggesting that El Niño with short duration has exerted an increasingly intense modulation on aerosol pollution in China over the past few decades.

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“…LRT haze can also affect the regional radiation budget directly by scattering or absorbing solar radiation and indirectly by altering the physical properties of clouds and the efficiency of precipitation (Ramanathan et al, 2007;Gao et al, 2014;Jeong et al, 2014;Jung et al, 2015). Zhang et al (2007) reported that the Asian pollution outflow influences precipitation over the North Pacific.…”

Section: Introductionmentioning

confidence: 99%

Ground-based characterization of aerosol spectral optical properties of haze and Asian dust episodes under Asian continental outflow during winter 2014

Jung

Yu²,

Lyu³

et al. 2017

Atmos. Chem. Phys.

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Abstract. Long-range transported (LRT) haze can affect the regional radiation budget and the air quality in areas downwind of the Asian continental outflow. Because in situ observations of spectral aerosol optical properties of the LRT haze are rare, an intensive characterization of aerosol optical properties is needed. This study characterized the spectral optical properties of the LRT haze and Asian dust originating from the Asian continent. Integrated chemical and optical measurements of aerosol particles were carried out in a downwind area of the Asian continental outflow (Daejeon, South Korea) during winter 2014. High concentrations of PM 10 (particulate matter with a diameter ≤ 10 µm) and light scattering coefficients at 550 nm, σ s,550 , were observed during a long-range transport (LRT) haze episode (PM 10 = 163.9 ± 25.0 µg m −3 ; σ s,550 = 503.4 ± 60.5 Mm −1 ) and Asian dust episode (PM 10 = 211.3 ± 57.5 µg m −3 ; σ s,550 = 560.9 ± 151 Mm −1 ). During the LRT haze episode, no significant change in the relative contribution of PM 2.5 (particulate matter with a diameter ≤ 2.5 µm) chemical components was observed as particles accumulated under stagnant atmospheric conditions (13-17 January 2014), suggesting that the increase in PM 2.5 mass concentration was caused mainly by the accumulation of LRT pollutants. On the other hand, a gradual decrease in Ångström exponent (Å) and a gradual increase in single scattering albedo (ω) and mass scattering efficiency (MSE) were observed during the stagnant period, possibly due to an increase in particle size. These results imply that a change in particle size rather than chemical composition during the stagnant period is the dominant factor affecting the aerosol optical properties. During the Asian dust episode, a low PM 2.5 / PM 10 ratio and Å(450/700) were observed with average values of 0.59 ± 0.06 and 1.08 ± 0.14, respectively, which were higher than those during the LRT haze episode (0.75 ± 0.06 and 1.39 ± 0.05, respectively), indicating that PM 2.5 / PM 10 mass ratios and Å(450/700) can be used as tracers to distinguish aged LRT haze and Asian dust under the Asian continental outflow.

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Relationship between fine-mode AOD and precipitation on seasonal and interannual time scales

Cited by 12 publications

References 51 publications

Impact of Siberian forest fires on the atmosphere over the Korean Peninsula during summer 2014

Impact of Siberian forest fires on the atmosphere over the Korean Peninsula during summer 2014

Intensified modulation of winter aerosol pollution in China by El Niño with short duration

Ground-based characterization of aerosol spectral optical properties of haze and Asian dust episodes under Asian continental outflow during winter 2014

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