冷湖赛什腾山一次大风沙尘天气及对天文观测的影响分析

Analysis of a Gale and Dust Weather and Its Influence on Astronomical Observation in Lenghu Saishiteng Mountain

文章从大气环流形势、不稳定条件、卫星云图、地形影响及沙尘暴成因等方面,分析了2022年7月20日冷湖赛什腾山大风沙尘天气过程。结果表明,此次大风沙尘天气具有显著的日变化,上午发展,下午至傍晚最强,入夜减弱;500 hPa存在较强的冷平流;地面冷锋加剧了不稳定能量,为沙尘暴天气的发生提供了有利的动力条件;过程对天文台址项目建设施工、天文观测及车辆安全通行造成了一定的影响。分析结果旨在及时掌握海西地区大风沙尘天气特征及其对赛什腾山天文活动的影响,为天文观测活动精细化气象保障服务提供参考依据。

This paper analyzed the process of gale and dust weather in Lenghu Saishiteng Mountain on July 20, 2022, in order to timely grasp the characteristics of gale and dust weather in the Hercynian region and its impact on the astronomical activities in Saishiteng Mountain, and provide a certain reference for the refined meteorological support services of astronomical observation activities. The analysis results show that the gale and dust weather has a significant diurnal variation :developing in the morning, the strongest from afternoon to evening, and weakening at night. There is strong cold advection at 500hPa. The surface cold front intensifies the unstable energy and provides favorable dynamic conditions for the occurrence of sandstorm weather. The construction of the observatory site project, astronomical observation and vehicle safety are affected to some extent.