CAJ | 학술논문

利用2013年春季在巴丹吉林沙漠北缘拐子湖地区的沙尘暴加强观测资料，对比分析该地区典型流动沙面晴天、扬沙和沙尘暴三种天气背景下各气象要素的变化特征及差异，以便进一步了解沙尘天气过程中近地层风沙活动特征。结果表明：随风速增加沙尘天气强度逐步提升且沙尘天气来临前风速、风向均表现出明显的调整现象，风向调整时风速减弱，此后爆发过程中风速、风向相对稳定。随沙尘天气强度增加气温逐渐减小，同时地面气压不断升高。悬浮的沙尘颗粒削弱了到达地面的太阳辐射，进而导致研究区各层地温有减小趋势，但减小程度相对较弱，使沙尘天气下各层地温仍保持良好的梯度变化和正弦型日变化趋势。春季该研究区起沙风速为6.5 m/s，输沙通量垂直分布状况在20 cm左右具有明显的分段现象。地表100 cm内总输沙量的50%和90%分别集中在地表20 cm和56 cm高度以内。观测期间整个5月地表0耀100 cm高度内的输沙通量为195.13 kg/m。
이용2013년춘계재파단길림사막북연괴자호지구적사진폭가강관측자료，대비분석해지구전형류동사면청천、양사화사진폭삼충천기배경하각기상요소적변화특정급차이，이편진일보료해사진천기과정중근지층풍사활동특정。결과표명：수풍속증가사진천기강도축보제승차사진천기래림전풍속、풍향균표현출명현적조정현상，풍향조정시풍속감약，차후폭발과정중풍속、풍향상대은정。수사진천기강도증가기온축점감소，동시지면기압불단승고。현부적사진과립삭약료도체지면적태양복사，진이도치연구구각층지온유감소추세，단감소정도상대교약，사사진천기하각층지온잉보지량호적제도변화화정현형일변화추세。춘계해연구구기사풍속위6.5 m/s，수사통량수직분포상황재20 cm좌우구유명현적분단현상。지표100 cm내총수사량적50%화90%분별집중재지표20 cm화56 cm고도이내。관측기간정개5월지표0요100 cm고도내적수사통량위195.13 kg/m。
Based on the data of sandstorms in spring 2013 from flux observation stations at Guaizi lake region in the northern margin of the Badain Jaran desert, which was built by the Institute of Desert Meteorology of China Meteorological Administration, we analyzed the characteristics of blown-sand activites and meteorological elements of the near surface layer under different weather conditions (clear day, rising dust day and sandstorm day). The results showed that the higher wind speed brought about stronger dust process. The wind speed and direction showed significant adjustment process before the dust weather, but it was relatively stable when it outbreaked. The ground temperature decreased with dust weather intensity increased. The floating dust resulted in that each layer of soil temperature showed a decrease tendency, but the degree of reduction was relatively weak. Moreover, the each layer of soil temperature under dust weather maintained good gradient changes and showed a diurnal variation trend of sine function curve. At the height of 2 m above surface, the instant sand-laden wind velocity for naturally mixed sands was about 6.5 m/s at one-minute interval. In the sand drift structure, the vertical sand flux was all in an increase trend with the increase of height below 20 cm from the ground. The vertical sand flux at all the height was exponent function decreased with the increase of height above 20 cm. The 50% and 90% of the total sand flux occurred mainly in the air layer below 20 cm and 56 cm from the ground, respectively. The sand flux within 0~100 cm height was 195.13 kg/m during the observation period.