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| 1 | Aerosol and boundary-layer interactions and impact on air quality显示文摘Air quality is concerned with pollutants in both the gas phase and solid or liquid phases. The latter are referred to as aerosols, which are multifaceted agents affecting air quality, weather and climate through many mechanisms. Unlike gas pollutants, aerosols interact strongly with meteorological variables with the strongest interactions taking place in the planetary boundary layer(PBL). The PBL hosting the bulk of aerosols in the lower atmosphere is affected by aerosol radiative effects. Both aerosol scattering and absorption reduce the amount of solar radiation reaching the ground and thus reduce the sensible heat fluxes that drive the diurnal evolution of the PBL. Moreover, aerosols can increase atmospheric stability by inducing a temperature inversion as a result of both scattering and absorption of solar radiation, which suppresses dispersion of pollutants and leads to further increases in aerosol concentration in the lower PBL.Such positive feedback is especially strong during severe pollution events. Knowledge of the PBL is thus crucial for understanding the interactions between air pollution and meteorology. A key question is how the diurnal evolution of the PBL interacts with aerosols, especially in vertical directions, and affects air quality.We review the major advances in aerosol measurements, PBL processes and their interactions with each other through complex feedback mechanisms, and highlight the priorities for future studies. | Zhanqing Li Jianping Guo Aijun Ding Hong Liao Jianjun Liu Yele Sun Tijian Wang Huiwen Xue Hongsheng Zhang Bin Zhu | 2017 | National Science Review2017，4，6： | 37 |
| 2 | 基于移动观测的城市机动车氨排放特征研究显示文摘氨(NH3)在城市细颗粒物(PM_(2.5))的形成中起重要作用,机动车是其重要来源之一.本文利用移动式走航测量方法,在上海市开展了为期8 d的实际道路NH3排放移动走航观测,获得了道路机动车NH3排放及分布特征.结果表明:①去除污染物背景数据后,实际道路机动车的ΔNH_(3)/ΔCO_(2)(NH_(3)与CO_(2)排放量之比,下同)为0.44×10^(−3),不同类型交通区存在显著差异,港区道路与中心城区道路机动车的ΔNH_(3)/ΔCO_(2)均较高,而高速公路相对较低.②交通条件对实际道路机动车的NH3排放量具有重要影响,道路拥堵状态下机动车低速行进时的ΔNH_(3)/ΔCO_(2)是道路通畅时高速行进状态下的2~3倍.③第四届中国国际进口博览会(2021年11月5-10日)期间,在重点拥堵路段实施的交通管制措施对削减机动车NH3排放具有积极作用.研究显示,交通条件是城市机动车NH3排放的重要影响因素之一. | 杨荟楠 马东翔 丁祥 刘文洋 楼晟荣 黄成 | 2023 | 环境科学研究2023，36，7： | 1 |
| 3 | 秋冬季大气混合污染对南京地区地表微气象学特征的影响分析——以2018年为例显示文摘利用江苏南京长三角大气过程与环境变化国家野外科学观测研究站(SORPES)的多要素集成观测数据,分析了2018年11月27日至12月3日期间在远距离沙尘输送和本地人为排放的综合影响下,大气混合污染对该地区地表微气象要素及能量平衡特征的影响。在此基础上,利用合成分析对比了南京地区秋冬季不同污染状况下地表气象要素和能量分配的响应特征。结果表明,污染天的日间气温比清洁天下降约1℃,而夜间气温升高达2℃。污染天向下/向上短波辐射通量减少的幅度高达清洁天同比的48.8%和55.2%,而夜间向下/向上长波辐射通量增幅则达到清洁天的15%和5.1%。清洁天日间净辐射较污染天高出45.6%,日间地表感热通量较污染天高出75.5%,而地表潜热通量的差异相对较小。污染天夜间平均波文比大于清洁天,表明夜间感热交换更强烈。该研究有助于深入认识长三角城市群区不同来源、不同性质的大气污染物对地表能量平衡和局地气象要素的影响过程和机制,为城市群区空气污染与气象条件的相互作用以及空气质量预报和相应的防治对策提供科学依据。 | 王佳泽 凌肖露 朱新胜 郭维栋 邹钧 孙鉴泞 | 2023 | 气候与环境研究2023，28，2： | 0 |
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