CAJ | 학술논문

分析了磴口近52年（1954-2005）逐月扬沙天气。结果表明：（1）该区扬沙天气一年四季均出现，但主要发生在春季，其次为冬季；一年中扬沙天气高峰出现在4月，低谷出现在8-9月。（2）年及春季、冬季、夏季扬沙日数各年代际变化规律一致，均为逐年代递减。秋季与其他三季扬沙日数变化略有不同。（3）年及四季扬沙日数均为线性下降，线性方程均通过了置信度0．001的显著性检验，下降率为年〉春季〉冬季〉夏季〉秋季，20世纪80年代为转折期，体现为“先多后少”的特点。年扬沙日数与春季扬沙日数滑动序列的波动趋势比较接近。
분석료등구근52년（1954-2005）축월양사천기。결과표명：（1）해구양사천기일년사계균출현，단주요발생재춘계，기차위동계；일년중양사천기고봉출현재4월，저곡출현재8-9월。（2）년급춘계、동계、하계양사일수각년대제변화규률일치，균위축년대체감。추계여기타삼계양사일수변화략유불동。（3）년급사계양사일수균위선성하강，선성방정균통과료치신도0．001적현저성검험，하강솔위년〉춘계〉동계〉하계〉추계，20세기80년대위전절기，체현위“선다후소”적특점。년양사일수여춘계양사일수활동서렬적파동추세비교접근。
Sand-blowing weather in Dengkou county over the months during 1954 to 2005 were analyzed. Result shows that：（1） sand-blowing weather occur in the entire year, but mainly during spring and secondly winter;the peak time appear in April, and the low ebb appear from August to September in a year; （2） the interdecadal change rule of the annual , spring, summer and winter sand-blowing days are fit, showing decreasing trend. However, change of sand-blowing days during autumn is different from other three seasons; （3） annual ＆ 4 seasons＇ sand-blowing days appear a linear decline; the significance inspection for the linear equation shows the confidence degree of equation is 0. 001 ;the order of declining rate is annual〉spring〉winter〉summer〉 autumn. 1980＇ s is the turning point, showing the feature of ＂majority to minority＂. The fluctuation trend of sliding sequence for annual number of sand-blowing days has a close accordance with that in springs.