Journal of Arid Meteorology ›› 2019, Vol. 37 ›› Issue (2): 277-287.DOI: 10.11755/j.issn.1006-7639(2019)-02-0277
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WANG Huiqing1, FU Yanan1, MENG Xuefeng2
Online:
Published:
王慧清1,付亚男1,孟雪峰2
作者简介:
基金资助:
Abstract: Based on the conventional observation data in Hulunbuir of Inner Mongolia and reanalysis data from GDAS and NECP/NCAR, the characteristics of water vapor transport and budget during an extreme snowfall process in the northeast of Inner Mongolia in spring of 2016 were analyzed by using Euler method. Then, the water vapor sources, main water vapor transport channels and their contribution to water vapor transport of the heavy snowfall process were simulated by HYSPLIT model and clustered, and compared with the traditional results obtained by Euler method. The results are as follows: (1) Three water vapor streams from different sources met in northeastern part of Inner Mongolia, which had an important impact on the snowstorm process in Hulunbuir region. (2) Meridional and zonal transportation provided sufficient water vapor condition for the snowstorm process. The water vapor over snowstorm area mainly came from water vapor transport at the southern boundary in middle and upper levels and the western boundary with the westerly airflow. (3) The simulated results by HYSPLIT model showed that there were mainly three water vapor sources during the heavy snowfall process, they were the ocean surface west of the Xindi Island, the Japan Sea and the Balkhash Lake, respectively, and their contribution rates of water vapor over Hulunbuir area were roughly equivalent.
Key words: extreme snowfall process, water vapor budget, Lagrangian trajectory, water vapor transportation, water vapor contribution
摘要: 利用内蒙古呼伦贝尔市常规观测资料和GDAS、NCEP/NCAR再分析资料,采用欧拉方法分析了2016年春季内蒙古东北部地区一次极端暴雪过程的水汽输送及收支特征,利用HYSPLIT模式和聚类分析模拟计算了此次暴雪天气过程的水汽源地、主要水汽输送通道及其对水汽输送的贡献,并与传统的欧拉方法结果进行对比。结果表明:(1)有3支不同源地的水汽流在内蒙古东北部地区交汇,对呼伦贝尔地区暴雪的发生与维持有重要影响;(2)经向和纬向输送为此次暴雪天气的发生提供了充足的水汽,暴雪区水汽主要源于中高层的南边界和随西风气流的西边界;(3)利用HYSPLIT模式模拟发现,在此次暴雪天气过程中水汽主要来源于新地岛以西洋面、日本海以及巴尔喀什湖,且三者贡献率大致相当。
关键词: 极端降雪过程, 水汽收支, 拉格朗日轨迹, 水汽输送, 水汽贡献
CLC Number:
P458.3
P458.1+21
WANG Huiqing, FU Yanan, MENG Xuefeng. Analysis on Characteristics of Water Vapor Transportation During an Extreme Snowfall Process in the Northeast of Inner Mongolia[J]. Journal of Arid Meteorology, 2019, 37(2): 277-287.
王慧清, 付亚男, 孟雪峰. 内蒙古东北部地区一次极端降雪过程的水汽输送特征[J]. 干旱气象, 2019, 37(2): 277-287.
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URL: http://www.ghqx.org.cn/EN/10.11755/j.issn.1006-7639(2019)-02-0277
http://www.ghqx.org.cn/EN/Y2019/V37/I2/277