Intense atmospheric pollution modifies weather: a case of mixed biomass burning with fossil fuel combustion pollution in eastern China

Ding, Aijun; Fu, Congbin; Yang, Xiu‐Qun; Sun, Jianning; Petäj̈ä, Tuukka; Kerminen, Veli‐Matti; Wang, Tao; Xie, Yue; Herrmann, Erik; Zheng, Longfei; Nie, Wei; Liu, Q.; Wei, Xiaolin; Kulmala, Markku

doi:10.5194/acp-13-10545-2013

Cited by 300 publications

(229 citation statements)

References 48 publications

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“…The reason for this result is changes in cloud cover due to modified atmospheric flow patterns caused by biomass burning aerosol and perturbed clouds. An even higher temperature difference due to vegetation fires is reported by Ding et al (2013). During a biomass burning situation in East China, 7.5 K are in between the forecast and the observations.…”

mentioning

confidence: 68%

“…When the AOD increased above 1.3, no more clouds were present. Biomass burning aerosol is also known to have an influence on precipitation and to cause hail events, which are not reported for smoke-free conditions (Ding et al, 2013;Andreae et al, 2004). Ding et al (2013) explicitly investigated the influence of extreme air pollution due to biomass burning on weather forecasting.…”

Section: Introductionmentioning

confidence: 99%

“…Biomass burning aerosol is also known to have an influence on precipitation and to cause hail events, which are not reported for smoke-free conditions (Ding et al, 2013;Andreae et al, 2004). Ding et al (2013) explicitly investigated the influence of extreme air pollution due to biomass burning on weather forecasting. A temperature of 34 • C was predicted for Nanjing, China, for 10 June 2012, but the temperature only reached 26.5 • C. The high concentration of scattering and absorbing aerosol reduced the solar radiation by 70 %.…”

Section: Introductionmentioning

confidence: 99%

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The importance of plume rise on the concentrations and atmospheric impacts of biomass burning aerosol

et al. 2016

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Abstract. We quantified the effects of the plume rise of biomass burning aerosol and gases for the forest fires that occurred in Saskatchewan, Canada, in July 2010. For this purpose, simulations with different assumptions regarding the plume rise and the vertical distribution of the emissions were conducted. Based on comparisons with observations, applying a one-dimensional plume rise model to predict the injection layer in combination with a parametrization of the vertical distribution of the emissions outperforms approaches in which the plume heights are initially predefined. Approximately 30 % of the fires exceed the height of 2 km with a maximum height of 8.6 km. Using this plume rise model, comparisons with satellite images in the visible spectral range show a very good agreement between the simulated and observed spatial distributions of the biomass burning plume. The simulated aerosol optical depth (AOD) with data of an AERONET station is in good agreement with respect to the absolute values and the timing of the maximum. Comparison of the vertical distribution of the biomass burning aerosol with CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) retrievals also showed the best agreement when the plume rise model was applied. We found that downwelling surface short-wave radiation below the forest fire plume is reduced by up to 50 % and that the 2 m temperature is decreased by up to 6 K. In addition, we simulated a strong change in atmospheric stability within the biomass burning plume.

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mentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The importance of plume rise on the concentrations and atmospheric impacts of biomass burning aerosol

et al. 2016

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“…The high level of anthropogenic emissions in eastern China render this area an important hotspot for studying how cloud micro-physical properties are affected by anthropogenic aerosols (Ding et al, 2013b). Based on the near-simultaneous aerosol and cloud retrievals provided by MODIS, CALIOP and CloudSat, together with the ERA-Interim reanalysis data, we investigated the effect of aerosols, with AOD used as a proxy for the aerosol loading, on micro-physical and macro-physical cloud properties over the YRD for the years 2007 to 2010.…”

Section: Resultsmentioning

confidence: 99%

Analysis of aerosol effects on warm clouds over the Yangtze River Delta from multi-sensor satellite observations

et al. 2017

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Abstract. Aerosol effects on low warm clouds over the Yangtze River Delta (YRD, eastern China) are examined using co-located MODIS, CALIOP and CloudSat observations. By taking the vertical locations of aerosol and cloud layers into account, we use simultaneously observed aerosol and cloud data to investigate relationships between cloud properties and the amount of aerosol particles (using aerosol optical depth, AOD, as a proxy). Also, we investigate the impact of aerosol types on the variation of cloud properties with AOD. Finally, we explore how meteorological conditions affect these relationships using ERA-Interim reanalysis data. This study shows that the relation between cloud properties and AOD depends on the aerosol abundance, with a different behaviour for low and high AOD (i.e. AOD < 0.35 and AOD > 0.35). This applies to cloud droplet effective radius (CDR) and cloud fraction (CF), but not to cloud optical thickness (COT) and cloud top pressure (CTP). COT is found to decrease when AOD increases, which may be due to radiative effects and retrieval artefacts caused by absorbing aerosol. Conversely, CTP tends to increase with elevated AOD, indicating that the aerosol is not always prone to expand the vertical extension. It also shows that the COT-CDR and CWP (cloud liquid water path)-CDR relationships are not unique, but affected by atmospheric aerosol loading. Furthermore, separation of cases with either polluted dust or smoke aerosol shows that aerosol-cloud interaction (ACI) is stronger for clouds mixed with smoke aerosol than for clouds mixed with dust, which is ascribed to the higher absorption efficiency of smoke than dust. The variation of cloud properties with AOD is analysed for various relative humidity and boundary layer thermodynamic and dynamic conditions, showing that high relative humidity favours larger cloud droplet particles and increases cloud formation, irrespective of vertical or horizontal level. Stable atmospheric conditions enhance cloud cover horizontally. However, unstable atmospheric conditions favour thicker and higher clouds. Dynamically, upward motion of air parcels can also facilitate the formation of thicker and higher clouds. Overall, the present study provides an understanding of the impact of aerosols on cloud properties over the YRD. In addition to the amount of aerosol particles (or AOD), evidence is provided that aerosol types and ambient environmental conditions need to be considered to understand the observed relationships between cloud properties and AOD.

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“…Measurements in Nanjing, for example, show 5 that reducing NO x emission could cause a tenfold increase in summer ozone concentrations. Reducing smog increases sunshine levels and temperatures, and alters rain and snowfall patterns 6 .…”

Section: Toxic MIXmentioning

confidence: 99%

Atmospheric chemistry: China’s choking cocktail

Kulmala

2015

Nature

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Intense atmospheric pollution modifies weather: a case of mixed biomass burning with fossil fuel combustion pollution in eastern China

Cited by 300 publications

References 48 publications

The importance of plume rise on the concentrations and atmospheric impacts of biomass burning aerosol

The importance of plume rise on the concentrations and atmospheric impacts of biomass burning aerosol

Analysis of aerosol effects on warm clouds over the Yangtze River Delta from multi-sensor satellite observations

Atmospheric chemistry: China’s choking cocktail

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