Journal ArticleDOI
Weather conditions conducive to Beijing severe haze more frequent under climate change
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In this paper, the authors looked at how atmospheric conditions contribute and projected climate change will increase conditions favorable to severe haze events in Beijing. But they did not consider the effect of global greenhouse gas emissions.Abstract:
Severe winter air pollution events, attributed to emissions from development, have increased in Beijing in recent decades. This study looks at how atmospheric conditions contribute and projects climate change will increase conditions favourable to such events. The frequency of Beijing winter severe haze episodes has increased substantially over the past decades1,2,3,4, and is commonly attributed to increased pollutant emissions from China’s rapid economic development5,6. During such episodes, levels of fine particulate matter are harmful to human health and the environment, and cause massive disruption to economic activities3,4,7,8,9,10,11,12,13,14,15,16, as occurred in January 201317,18,19,20,21. Conducive weather conditions are an important ingredient of severe haze episodes3,21, and include reduced surface winter northerlies3,21, weakened northwesterlies in the midtroposphere, and enhanced thermal stability of the lower atmosphere1,3,16,21. How such weather conditions may respond to climate change is not clear. Here we project a 50% increase in the frequency and an 80% increase in the persistence of conducive weather conditions similar to those in January 2013, in response to climate change. The frequency and persistence between the historical (1950–1999) and future (2050–2099) climate were compared in 15 models under Representative Concentration Pathway 8.5 (RCP8.5)22. The increased frequency is consistent with large-scale circulation changes, including an Arctic Oscillation upward trend23,24, weakening East Asian winter monsoon25,26, and faster warming in the lower troposphere27,28. Thus, circulation changes induced by global greenhouse gas emissions can contribute to the increased Beijing severe haze frequency.read more
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Journal ArticleDOI
Impacts of East Asian winter monsoon circulation on interannual variability of winter haze days in Guangdong Province
TL;DR: In this article , the authors constructed a winter comprehensive circulation index (WCIDX) to express the joint effects of the above regional-scale circulations on haze days in Guangdong Province.
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Source apportionment of PM2.5 bound Polycyclic Aromatic Hydrocarbons from a Tricity in the foothills of Himalayas in Northern India
TL;DR: In this paper, the authors highlight variability in mass levels and source identification of PM 2.5 bound polycyclic aromatic hydrocarbons (PAHs) in the tricity of Chandigarh, Mohali and Panchkula in India.
Book ChapterDOI
Pearl River Delta and Guangzhou (Canton) China
Lynn Donelson Wright,Wei Wu +1 more
TL;DR: By 2015, the Pearl River Delta urban agglomeration had overtaken Tokyo as the world's largest megacity and placed Guangzhou at or near the top of the list of the most threatened coastal cities.
Journal ArticleDOI
Integrated ground and vertical measurement techniques to characterize overhead atmosphere: Case studies of local versus transboundary pollution.
Chang‐Feng Ou‐Yang,Chih Chung Chang,Sheng Hsiang Wang,Charles C.-K. Chou,Ming Tung Chuang,T. H. Lin,Wei-Nai Chen,Ta Chih Hsiao,Ming Cheng Yen,Yueh Chen Wang,N. H. Lin,Jian Wang +11 more
TL;DR: In this paper , the authors integrated ground-based measurements, unmanned aerial vehicles (UAVs), and model simulations to characterize the meteorological, chemical, and particulate matter (PM) properties comprehensively for the events that were LRT or local pollution (LP) dominated in northern Taiwan during the wintertime of 2017.
References
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The NCEP/NCAR 40-Year Reanalysis Project
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Journal ArticleDOI
High secondary aerosol contribution to particulate pollution during haze events in China
Ru-Jin Huang,Yan-Lin Zhang,Carlo Bozzetti,Kin Fai Ho,Junji Cao,Yongming Han,Kaspar R. Daellenbach,Jay G. Slowik,Stephen Matthew Platt,Francesco Canonaco,Peter Zotter,Robert Wolf,Simone M. Pieber,Emily A. Bruns,Monica Crippa,Giancarlo Ciarelli,Andrea Piazzalunga,Margit Schwikowski,Gülcin Abbaszade,Jürgen Schnelle-Kreis,Ralf Zimmermann,Zhisheng An,Sönke Szidat,Urs Baltensperger,Imad El Haddad,André S. H. Prévôt +25 more
TL;DR: The results suggest that, in addition to mitigating primary particulate emissions, reducing the emissions of secondary aerosol precursors from fossil fuel combustion and biomass burning is likely to be important for controlling China’s PM2.5 levels and for reducing the environmental, economic and health impacts resulting from particulate pollution.
Health effects of fine particulate air pollution: line that connect
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