globalchange  > 气候变化与战略
DOI: 10.1016/j.atmosenv.2020.117658
论文题名:
Two heavy haze events over Lumbini in southern Nepal: Enhanced aerosol radiative forcing and heating rates
作者: Rupakheti D.; Kang S.; Rupakheti M.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 236
语种: 英语
英文关键词: Air pollution ; Atmospheric radiation ; Heating rate ; Urban growth ; Aerosol optical depths ; Aerosol parameters ; Aerosol radiative forcing ; Atmospheric heating rate ; Back trajectory analysis ; Indo-Gangetic Plains ; Meteorological condition ; Significant locations ; Aerosols ; AERONET ; aerosol ; air mass ; atmospheric pollution ; biomass burning ; dry season ; haze ; heating ; pollution monitoring ; radiative forcing ; Gangetic Plain ; Lumbini ; Nepal
学科: AERONET ; Aerosol optical properties ; Haze events ; Lumbini ; Radiative forcing
中文摘要: The Indo-Gangetic Plain (IGP) suffers from recurrent heavy air pollution during the dry season of each year. The AERONET station established in Lumbini, a semi-urban site and historically significant location as the birthplace of Buddha in the northern edge of the central IGP in Nepal, captured two events of heavy air pollution: 29–30 October (Event-I) and 1–2 December (Event-II) of 2014. Daily aerosol optical depth (AOD) was found to be 2.66, 2.44, 2.09 and 2.15 respectively with Ångström exponent (AE) > 1 during both events. The daily AOD during two events was 3.26–4.43 times higher than average AOD observed during the monitoring period 2013-2014. Based on various aerosol parameters we concluded that the fine-mode aerosols sourced from biomass-burning and urban/industrial activities were responsible for the haze events. Aerosol absorbed 205-240 Wm-2 of the solar radiation in the atmosphere, resulting in aerosol-induced atmospheric heating rate of 5.76–7.28 K day−1 during the hazy days. Back-trajectory analysis of air masses reaching Lumbini showed that the air masses either originated or travelled over the regions with open fires both prior and during the events. In addition to this, meteorological conditions (e.g. prevailing winds) also played role in initiation/persistence of the haze events. © 2020 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160249
Appears in Collections:气候变化与战略

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作者单位: State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, 100101, China; Institute for Advanced Sustainability Studies, Potsdam, Germany

Recommended Citation:
Rupakheti D.,Kang S.,Rupakheti M.. Two heavy haze events over Lumbini in southern Nepal: Enhanced aerosol radiative forcing and heating rates[J]. Atmospheric Environment,2020-01-01,236
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