[1]CHEN Jian-wen,HU Lin,WANG Juan-min,et al.Distribution Characteristics of the Mixed Layer Height in Shaanxi Province[J].Research of Soil and Water Conservation,2014,21(05):322-326,331.
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Distribution Characteristics of the Mixed Layer Height in Shaanxi Province
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
21
Number of periods:
2014 05
Page number:
322-326,331
Column:
Public date:
2014-10-28
- Title:
- Distribution Characteristics of the Mixed Layer Height in Shaanxi Province
- Keywords:
- Shaanxi Province; atmospheric stability; the mixed layer height; distribution characteristics
- CLC:
- X16
- DOI:
- -
- Abstract:
- This paper calculated the mixed layer height according to hourly observation data of the 99 meteorological stations in Shaanxi Province from 2006 to 2011, analyzed the characteristics of regional distribution, the four seasons and the daily variation of the mixed layer height by using GIS system. The results show that: ① for area distribution of annual and seasonal, the highest mixed layer height is in Guanzhong, followed by the northern Shaanxi, it is the lowest in southern Shaanxi. Among them, it is lower in northern Shaanxi area and higher in the middle area, it is higher in the northeast and lower in southwest in the other areas; ② regional mixing layer height is the highest in spring, followed the summer, minimum is in the winter. It is the lowest in December or January, then increased rapidly, it reached the highest in April or May, then gradually decreased; ③ daily variation presented unimodal, began to rise rapidly after sunrise, reached the highest at 13:00 PM, began to decrease rapidly at 16:00 PM, continued to be low after sunset until the next sunrise, the peak duration is longer in spring and summer peak duration, is shorter in autumn and winter; ④ the difference of average mixing layer height is not big, most of the time in the Guanzhong is slightly higher than that of northern Shaanxi; the daytime in spring and summer, 9:00 AM to 16:00 PM in autumn, 10:00 AM to 15:00 PM in winter of southern Shaanxi is significantly lower than that of northern Shaanxi and the Guanzhong, but 18:00 PM to 7:00 AM next day in autumn, 17:00 PM to 7:00 AM next day in winter of southern Shaanxi is mostly higher than that of northern Shaanxi and the Guanzhong.
- References:
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