Journal of Arid Meteorology

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Relationship Between Winter Shallow Soil Temperature and Spring Sand - dust Days in East of Hexi Corridor

ZHANG Aiping1LI Lingping2   

  1. 1. Minqin Meteorological Station of Gansu Province,Minqin 733300,China;
    2. Wuwei Meteorological Bureau of Gansu Province,Wuwei 733000,China
  • Online:2014-08-01 Published:2014-08-01

河西走廊东部冬季浅层地温与春季沙尘天气的关系

张爱萍1李玲萍2   

  1. 1.甘肃省民勤县气象局,甘肃民勤733300;
    2.甘肃省武威市气象局,甘肃武威733000
  • 作者简介:张爱萍(1967-),女,甘肃民勤人,工程师,主要从事大气探测工作.E-mail:zap0068@163.com
  • 基金资助:

    干旱气象科学研究基金项目“干旱半干旱区边界层变化特征及其对气候变化的响应(IAM201307)”资助

Abstract:

Based on the shallow soil temperature at 0 cm, 5 cm, 10 cm, 15 cm and 20 cm depths in winter during 1960-2010 and the sand -dust days in spring during 1961-2011 from Minqin,Liangzhou and Yongchang meteorological stations in east of Hexi Corridor,the temporal and spatial distribution characteristics of winter shallow soil temperature and spring sand -dust days were analyzed,and their relationship was discussed.The results showed that the spatial distribution of soil temperature at different depths had obvious distinction due to the altitude and geographic location influence. The winter shallow soil temperature in Yongchang with the highest altitude was the lowest,and that in Minqin with the lowest altitude was lower,while that in Liangzhou with altitude between Minqin and Yongchang was the highest.The spring sand-dust days decreased gradually from low altitude areas to high altitude areas,and it was the most in Minqin and the fewest in Yongchang.The annual changes of spring sand - dust days and winter shallow soil temperature were obviously contrary,and there were an increasing trend of winter soil temperature and decreasing trend of spring sand-dust days.The vibration periods of them were 6-7 years and 9-10 years. The sand -dust days had significant negative relation with soil temper-ature at different depths,especially for 0 cm soil temperature,the correlation was the most significant.

Key words:  0-20 cm soil temperature, sand-dust days, east of Hexi Corridor

摘要:

利用河西走廊东部民勤凉州永昌3个气象站1960~2010年冬季05、10、15、20 cm地温和1961~2011年春季沙尘暴和扬沙天气的常规观测资料,分析了河西走廊东部冬季浅层地温和春季沙尘天气日数的时空特征,进而探讨了春季沙尘天气与冬季浅层地温的关系。结果表明:受海拔高度地理位置等影响,河西走廊东部冬季浅层地温有明显地域差异,其中高海拔的永昌最低,低海拔的民勤次之,而海拔介于民勤和永昌之间的凉州最高;春季沙尘天气日数自低海拔地区向高海拔地区逐渐减少,即民勤最多凉州区次之永昌最少;河西走廊东部的沙尘天气日数与浅层地温在空间上呈一定的负相关,二者的年变化趋势明显相反,即冬季浅层地温总体呈逐年升高的趋势,而春季沙尘日数呈逐年减少的趋势,且都存在6~7 a和9~10 a的周期;相关分析表明,河西走廊东部春季沙尘日数与冬季浅层地温呈负相关,其中与0 cm地温的相关性最显著。

关键词: 0~20cm地温, 沙尘日数, 河西走廊东部

CLC Number: