干旱区研究

Arid Zone Research >

2014 , Vol. 31 >Issue 5: 915 - 921

DOI: https://doi.org/10.13866/j.azr.2014.05.20

Weather and Climate

Snowfall Derived from Ground-Based GPS in a Heavy Snowfall Process in the Tianshan Mountains

  • LI Man ,
  • YANG Lian-mei ,
  • ZHAO Ling
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  • 1. Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830002, China;
    2. Xinjiang Meteorological Observatory, Urumqi 830002, China

Received date: 2013-10-21

  Revised date: 2014-01-12

  Online published: 2014-09-25

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Abstract

The evolution features of GPS-PWV in a persistent heavy snowfall process in the Tianshan Mountains from November 6 to 9, 2012 were analyzed using the GPS Perceptible Water Vapor (GPS-PWV) observations derived from the ground-based GPS network in the Tianshan Mountains, reanalyzed data and observed precipitation data from an automatic weather station. The results indicated that the variation trend of GPS-PWV in the Tianshan Mountains had an indication effect on snowfall. The value of GPS-PWV was increased continuously and obviously in more than ten hours prior to snowfall, and the amplification of GPS-PWV equaled the average monthly precipitable water vapor in recent ten years. Snowfall started within 3 hours before or after GPS-PWV was increased to its maximum. The high value of GPS-PWV in spatial distribution coincided with the snowfall areas. With water vopar converging and accumulating, GPS-PWV was increased with the time. Along with water vapor moving into Xinjiang with westerly wind, GPS-PWV was significantly increased from the west to the east. The temporal and spatial evolution characteristics can be used to accurately indicate the characteristics of water vapor.

Key words： ground-based GPS Perceptible Water Vapor; heavy snowfall; circulation pattern; Tianshan Mountains; Xinjiang

Cite this article

LI Man , YANG Lian-mei , ZHAO Ling . Snowfall Derived from Ground-Based GPS in a Heavy Snowfall Process in the Tianshan Mountains[J]. Arid Zone Research, 2014 , 31(5) : 915 -921 . DOI: 10.13866/j.azr.2014.05.20

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