ENSO Contribution to Aerosol Variations over the Maritime Continent and the Western North Pacific during 2000–10

Wu, Renguang; Wen, Zhiping; He, Zhuoqi

doi:10.1175/jcli-d-12-00253.1

Cited by 21 publications

(23 citation statements)

References 57 publications

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“…4a) was greater than that of DJF (Fig. 4b), which is consistent with Wu et al (2013). The standard deviation of interannual variation in AOD in SON was 0.072, whereas that in DJF was 0.018.…”

Section: Seasonal Difference Of Interannual Variation In Aod Over Thesupporting

confidence: 85%

“…Recently, some previous studies suggested that interannual precipitation variation controls AOD on interannual time-scale by using these stored observational data (e.g., Jeoung et al 2014;Wu et al 2013). However, there are few studies also focusing on the aerosol-cloud-precipitation interactions although aerosol also affects cloud properties, such as CER and cloud number concentration, and precipitation development.…”

Section: Introductionmentioning

confidence: 99%

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Asymmetrical Interannual Variation in Aerosol Optical Depth over the Tropics in Terms of Aerosol-Cloud Interaction

Yamaji

Takahashi

2014

SOLA

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We statistically investigated an interannual co-variation among aerosol optical depth (AOD), cloud effective radius (CER), and precipitation, focusing on aerosol-cloud interaction over the tropics. A three-month composite analysis for AOD, CER, and precipitation for 2000−2012 based on El Niño-Southern Oscillation phases during September-October-November (SON) and December-January-February shows that an increase (decrease) in AOD in the El Niño (La Niña) years was associated with a decrease (increase) in precipitation, particularly in SON over the Maritime Continent. Additionally, CER decreased in the El Niño years over the same region, which implies that CER was associated with interannual variation in aerosol burden; these results were statistically significant. Interannual variation in AOD and CER in SON in the Maritime Continent was asymmetrical, which can be explained by stronger aerosol-cloud interactions under drier conditions. Specifically, large amounts of aerosols suppressed cloud and precipitation formation, which leads to decreases in wet deposition and increases in emission under warmer and drier surface conditions. This feedback results in asymmetrical variation. Furthermore, the asymmetrical interannual variation was confirmed statistically.(Citation: Yamaji, M., and H. G. Takahashi, 2014: Asymmetrical interannual variation in aerosol optical depth over the tropics in terms of aerosol-cloud interaction. SOLA, 10, 185−189,

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Section: Seasonal Difference Of Interannual Variation In Aod Over Thesupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Asymmetrical Interannual Variation in Aerosol Optical Depth over the Tropics in Terms of Aerosol-Cloud Interaction

Yamaji

Takahashi

2014

SOLA

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“…), which indicates that ENSO may affect the haze pollution over East Asia through influencing the monsoon circulation. Wu et al (2013) found that the aerosol variations over the Maritime Continent and western North Pacific presented a biennial feature, which could be attributed to the impacts of ENSO. From the results of Wu et al (2013), it seemed that ENSO only influenced the aerosols over eastern China (30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40) • N, 110-120 • E) around October in El Niño or La Niña developing years and July in El Niño or La Niña decaying years.…”

Section: Introductionmentioning

confidence: 94%

“…Wu et al (2013) found that the aerosol variations over the Maritime Continent and western North Pacific presented a biennial feature, which could be attributed to the impacts of ENSO. From the results of Wu et al (2013), it seemed that ENSO only influenced the aerosols over eastern China (30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40) • N, 110-120 • E) around October in El Niño or La Niña developing years and July in El Niño or La Niña decaying years. Gao and Li (2015) revealed statistically and through case analyses that El Niño (La Niña) events were more likely to bring about more (fewer) haze days in eastern China (25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35) • N, 105-122.5 • E).…”

Section: Introductionmentioning

confidence: 94%

The effects of El Niño–Southern Oscillation on the winter haze pollution of China

2018

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Abstract. It has been reported in previous studies that El Niño-Southern Oscillation (ENSO) influenced not only the summer monsoon, but also the winter monsoon over East Asia. This contains some clues that ENSO may affect the winter haze pollution of China, which has become a serious problem in recent decades, through influencing the winter climate of East Asia. In this work, we explored the effects of ENSO on the winter (from December to February) haze pollution of China statistically and numerically. Statistical results revealed that the haze days of southern China tended to be fewer (more) than normal in El Niño (La Niña) winter, whereas the relationships between the winter haze days of northern and eastern China and ENSO were not significant. Results from numerical simulations also showed that ENSO influenced the winter atmospheric anthropogenic aerosol content over southern China more obviously than it did over northern and eastern China. Under the emission level of aerosols for the year 2010, winter atmospheric anthropogenic aerosol content over southern China was generally greater (less) than normal in El Niño (La Niña) winter. This was because the transport of aerosols from South and Southeast Asia to southern China was enhanced (weakened), which masked the better (worse) scavenging conditions for aerosols in El Niño (La Niña) winter. The frequency distribution of the simulated daily surface concentrations of aerosols over southern China indicated that the region tended to have fewer clean and moderate (heavy) haze days, but more heavy (moderate) haze days in El Niño (La Niña) winter.

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“…Precipitation predictability can lead to aerosol predictability, once a precipitationÁaerosol relationship is established. Studies addressing ENSO impacts on aerosols exist; for instance, Wu et al (2013) revealed a biennial component of aerosol variability over the Maritime Continent (58SÁ58N, 95Á1358E) and the western North Pacific Ocean. The novelty of the current study is to analyse the fine-mode aerosol optical depth (fAOD) in relation to ENSO.…”

Section: Introductionmentioning

confidence: 99%

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

Jeoung

Chung

Noije

2014

Tellus B: Chemical and Physical Meteorology

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A B S T R A C T On seasonal and interannual time scales, weather is highly influential in aerosol variability. In this study, we investigate the relationship between fine-mode AOD (fAOD) and precipitation on these scales, in order to unravel the effect of wet weather on aerosol amount. We find with integrated satellite and ground observations that biomass burning related fAOD has a relatively greater seasonal variation than fossil fuel combustion related fAOD. It is also found that wet weather reduces biomass burning fAOD and increases fossil fuel combustion fAOD. Aerosol simulation models forced by reanalyses consistently simulate the biomass burning fAOD reduced during wet weather but only in the tropics and furthermore do not consistently increase fossil fuel combustion fAOD during wet conditions. The identified relationship between fAOD and precipitation in observations allows for seasonal predictability of fAOD, since average precipitation can be predicted a few to several months in advance due to the well-established predictability of El Nin˜o-Southern Oscillation (ENSO). We reveal ENSO-covariant fAOD using a rotated component principal analysis of combined interannual variation of sea surface temperature, precipitation and fAOD. During the warm phase of ENSO, we find that fAOD increases over Indonesia and the eastern coastal area of China, and decreases over South Asia, the Amazon and the continental parts of China.

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ENSO Contribution to Aerosol Variations over the Maritime Continent and the Western North Pacific during 2000–10

Cited by 21 publications

References 57 publications

Asymmetrical Interannual Variation in Aerosol Optical Depth over the Tropics in Terms of Aerosol-Cloud Interaction

Asymmetrical Interannual Variation in Aerosol Optical Depth over the Tropics in Terms of Aerosol-Cloud Interaction

The effects of El Niño–Southern Oscillation on the winter haze pollution of China

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

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