Aerosol Direct Radiative Effects over China Based on Long-Term Observations within the Sun–Sky Radiometer Observation Network (SONET)
Aerosol Direct Radiative Effects over China Based on Long-Term Observations within the Sun–Sky Radiometer Observation Network (SONET)
复制标题
基于太阳天空辐射计观测网（SONET）长期观测的中国气溶胶直接辐射效应
DOI：
10.3390/rs12203296
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发表时间：
2020
期刊：
影响因子：
5
通讯作者：
Hua Xu
中科院分区：
文献类型：
--
作者：
Li Li;Zhanqing Li;Kaitao Li;Yan Wang;Qingjiu Tian;Xiaoli Su;Leiku Yang;Song Ye;Hua Xu
为了研究气溶胶辐射效应，太阳-天空辐射计观测网络（SONET）在中国各地的20个站点进行了长期的大气气溶胶特性观测。气溶胶直接辐射强迫（RF）和效率（RFE，每单位气溶胶光学厚度对大气的强迫率）是根据2009年的地面观测，使用辐射传输模型模拟估算的。多年月平均RF结果表明：在干旱和半干旱地区，以沙尘为主的气溶胶群体具有中等的冷却效应（−8.0~−31.2 W/m2）在大气顶部和底部（TOA和BOA）;大陆背景场RF很弱（−0.8~−2.9 W/m2）;在城市和郊区的站点，精细模式占主导地位的气溶胶产生了中等的冷却效果（-9.3 ~-24.1 W/m2），但冷却效果更显著（−19.4~−50.6 W/m2），BOA;沿海站点的RF值与城市站点的RF值相当（TOA为−5.5~−19.5 W/m2，BOA为−15.6~−44.6 W/m2），这是由于海洋和城市工业气溶胶的综合影响。在TOA和BOA RFE之间的差异表明，在干旱，半干旱和大陆背景站点的粗模式占主导地位的气溶胶是不太有效的温暖的大气，但在城市，郊区和沿海地区的细模式占主导地位的气溶胶被证明是更有效的加热大气。
To investigate aerosol radiative effects, the Sun–Sky Radiometer Observation Network (SONET) has performed long-term observations of columnar atmospheric aerosol properties at 20 distributed stations around China. The aerosol direct radiative forcing (RF) and efficiency (RFE, the rate at which the atmosphere is forced per unit of aerosol optical depth) were estimated using radiative transfer model simulations based on the ground-based observations dating back to 2009. Results of multi-year monthly average RF illustrated that: the dust-dominant aerosol population at arid and semi-arid sites exerted moderate cooling effects (−8.0~−31.2 W/m2) at the top and bottom of atmosphere (TOA and BOA); RF at continental background site was very weak (−0.8~−2.9 W/m2); fine-mode dominant aerosols at urban and suburban sites exerted moderate cooling effects (−9.3~−24.1 W/m2) at TOA but more significant cooling effects (−19.4~−50.6 W/m2) at BOA; RF at coastal sites was comparable with values of urban sites (−5.5~−19.5 W/m2 at TOA, and −15.6~−44.6 W/m2 at BOA), owing to combined influences by marine and urban–industrial aerosols. Differences between RFE at TOA and BOA indicated that coarse-mode dominant aerosols at arid, semi-arid, and continental background sites were less efficient to warm the atmosphere; but fine-mode dominant aerosols at urban, suburban, and coastal sites were shown to be more efficient to heat the atmosphere.