On 4^th August 2020, drastic explosions occurred at the port of Beirut, Lebanon. These explosions released an extensive amount of toxic gases and caused atmospheric damages along with terrestrial and marine disturbances. In the current study, the impact of the incident on both local and regional air quality was assessed by ALOHA and HYSPLIT models. The ALOHA results estimated the concentrations of NO₂ and NO and their exposure times for two specific densely populated locations in the high-risk zone. The concentrations of outdoor NO₂ exceeded the AEGL-3 tier in Borj Hammoud, and Jdeideh after 8, and 10 min of the explosion, respectively. The HYSPLIT results showed the movement of NOx cloud eastwards, reaching Syria, and turned southwards, affecting Iraq, Jordon, Saudi Arabia, Kuwait, Iran, and then moved to central Asia through Turkmenistan. The air quality station at Khorramabad, Iran, could observe a small peak during the NOx toxic cloud arrival time on 6^th August 2020 at 13:00 UTC. Besides the Mediterranean Sea, the Caspian Sea, the Persian Gulf, and the Gulf of Oman were also affected by the toxic clouds. Damascus is in the high impacted zone with around 105 kg NO₂ deposition. Fragile marine environments are also disturbed. The Persian Gulf, with more than 80% of its area, under low impacted zone was receiving 10 µgm⁻². Results drag the attention to the associated risk of old factories to the environment. Therefore, it is necessary to have regular safety monitoring in industrial zones and neighboring to eliminate future incidents.

2020年8月4^日，黎巴嫩贝鲁特港发生剧烈爆炸。这些爆炸释放出大量有毒气体，并造成大气破坏以及陆地和海洋干扰。在目前的研究中，事件对当地和区域空气质量的影响是通过 ALOHA 和 HYSPLIT 模型评估的。ALOHA 结果估计了高风险区内两个特定人口稠密地区的 NO ₂和 NO浓度及其暴露时间。室外NO ₂浓度分别在爆炸 8 分钟和 10 分钟后超过了 Borj Hammoud 和 Jdeideh 的 AEGL-3 层级。HYSPLIT结果显示NOx云向东移动，到达叙利亚，然后向南移动，影响伊拉克、约旦、沙特阿拉伯、科威特、伊朗，然后通过土库曼斯坦移动到中亚。位于伊朗霍拉马巴德的空气质量站可以在2020 年 8 月6^日UTC时间13:00的 NOx 有毒云到达时间观察到一个小峰值。除地中海外，里海、波斯湾和阿曼湾也受到毒云的影响。大马士革位于高影响区，约有 105 kg NO ₂沉积。脆弱的海洋环境也受到干扰。波斯湾，其 80% 以上的面积在低影响区之下，受到 10 µgm ^{-2 的影响}。结果将注意力转移到旧工厂对环境的相关风险上。因此，有必要对工业区及邻近地区进行定期安全监控，以杜绝未来发生的事故。