喀什机场一次大降雪天气过程分析及气象服务

An Analysis of a Heavy Snowfall Weather Process and Meteorological Service at Kash-gar Airport

摘要: 应用常规实况观测资料，NCEP1˚ × 1˚资料，FY-2G红外云图资料，分析了2023年1月13~14日喀什机场大降雪天气的成因。结果表明：此次大降雪主要是受中亚低槽影响，低槽先加深、后减弱北收持续影响是喀什机场能够长时间降雪的主要原因。大降雪过程中有明显的低层辐合、高层辐散及低空偏东急流；高空西南气流、低层持久的偏东急流为大降水提供了充足的水汽。

Abstract: Conventional observation data, NCEP1˚ × 1˚ data, geostationary satellite FY-2G infrared cloud image data are applied to analyze the cause of heavy snow weather at Kashgar Airport on January 13~14, 2023. The results show that the heavy snowfall is mainly affected by the Central Asia trough. The main reason why Kashgar Airport can snow for a long time is that the trough first deepens and then weakens the continuous impact of the north end. During the heavy snowfall process, there is obvious low-level convergence, high-level divergence, and low-level easterly jet streams; The high-altitude southwest airflow and the persistent easterly jet in the lower layers provide sufficient water vapor for heavy precipitation.