[口头报告]气溶胶对青藏高原暖季液相云微物理属性影响的空间差异性

气溶胶对青藏高原暖季液相云微物理属性影响的空间差异性
编号:3509 稿件编号:1378 访问权限:私有 更新:2023-04-26 08:35:35 浏览:343次 口头报告

报告开始:2023年05月06日 16:20 (Asia/Shanghai)

报告时间:15min

所在会议:[14B] 14B、气溶胶与大气环境 » [14B-1] 14B-1 气溶胶与大气环境

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摘要
      The effect of aerosol on liquid cloud microphysical properties over the Tibetan Plateau during the warm season is investigated by using aerosol index and cloud property parameters data. Distinct differences in aerosol effect on liquid cloud microphysical properties have been found between the northern TP (NTP) and southern TP (STP). The composite liquid cloud droplet effective radius (LREF) anomalies for positive aerosol index (AI) events are positive in the NTP and negative in the STP. In both NTP and STP, when the AI anomalies are positive, the LREF anomalies are also positive, which suggests that the increased aerosol loading reduces the solar radiation reaching the ground and thus enhances the atmospheric stability, which reduces the cloud base height and makes the liquid cloud area thicker, which gives cloud droplets more space to grow by collision-coalescence. This indicates that the aerosol radiative effect is not likely the reason causing the distinct differences of aerosol effects on liquid cloud properties between NTP and STP. Further analysis shows that in the STP, the LREF first increases and then decreases with the increase of AI, while in the NTP, the LREF always increases with the increase of AI, suggesting a spatial difference in aerosol microphysical effect. In the STP, the influence of aerosol on liquid clouds is mainly dependent on liquid water path (LWP) and convective available potential energy (CAPE), while in the NTP, the influence of aerosol on liquid cloud is more likely related to large aerosol particles.
关键字
气溶胶,液相云,云滴有效半径,青藏高原
报告人
赵鹏国
成都信息工程大学

稿件作者
赵鹏国 成都信息工程大学
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