沙漠与绿洲气象2017，Vol.11Issue(3)：47-54,8.DOI:10.12057/j.issn.1002-0799.2017.03.007
新疆西部一次大暴雨过程水汽输送轨迹模拟
Simulation of Water Vapor Transport Trajectories of a Heavy Rain in Western Xinjiang
摘要
Abstract
Based on the analysis of the circulation situation and influence system of the rare heavy rain in the west of Xinjiang from July 28th to August 2rd, 2016, the HYSPLIT model based on the Lagrangian method was used to calculate the water vapor transport trajectories, the main passages and different contribution of water vapor sources of the different areas and different heights. The results showed that (1)200 hPa high-altitude partial west jet, 700 hPa and 850 hPa low-altitude partial east jet and convergence line as well as 500 hPa stable "two ridges and one groove"circulation were the synoptic background of the heavy rain.(2)In the process of heavy rain, there were differences in the water vapor transport trajectory and the contribution of water vapor which came from different sources in northern Aksu, the Ili River valley and eastern Bozhou. Water vapor of 1500 m, 3000 m, 5000 m in northern Aksu mainly came from Central Asia, Central Asia, northern Mediterranean respectively, and contribution of water vapor accounted for 38%, 46%, 48%. Water vapor of 1500 m, 3000 m, 5000 m in Ili River valley mainly came from Kazakhstan, Kazakhstan, south of the Black Sea respectively, and contribution of water vapor accounted for 100%, 50%, 68%. Water vapor of 1500 m, 3000 m, 5000 m in eastern Bozhou mainly came from Western Siberia, Central Asia, Eastern Europe respectively, and contribution of water vapor accounted for 58%, 54%, 82%. The heights of water vapor passages varied in transportation with the east and south passages as its main path.(3)Continental Europe, Western Siberia, Central Asia and other lands and the Black Sea, the Caspian Sea and other seas were the main sources of the water vapor. The low-altitude partial east wind and the convergence line played an important role in the accumulation and upward transportation of water vapor in southern Xinjiang, the sinking airflow of the secondary circulation which generated by the high-level jet also have a tremendous impact on downward convey of high-altitude water vapor. Almost all trajectories have been passed through the Central Asian region to reach the heavy rain areas, the Central Asian region was hence the key areas of water vapor passages in the process of heavy rain.关键词
新疆西部/大暴雨/水汽输送/拉格朗日轨迹Key words
Western Xinjiang/heavy rain/water vapor transport/lagrange trajectory分类
天文与地球科学引用本文复制引用
曾勇,杨莲梅,张迎新..新疆西部一次大暴雨过程水汽输送轨迹模拟[J].沙漠与绿洲气象,2017,11(3):47-54,8.基金项目
科技部公益性行业科研专项(GYHY201506009)、国家自然科学基金项目(41565003)、国家自然科学基金国际合作项目(41661144024)共同资助. （GYHY201506009）
