摘要
在研究沙漠和估算沙丘移动速度中,人们常引用附近气象站的风速资料。但由于地面状况的不同以及林带等原因的影响使两地的风况有着一定的差距。本文通过对策勒县绿洲外围戈壁沙丘上的风速观测,发现绿洲内与戈壁沙丘的风向风速有着一定的关系和差距,结果表明: 1.戈壁沙丘与绿洲内的风向较接近,两地间风向偏差<45°的频率为90%。 2.戈壁沙丘的平均风速明显大于绿洲内的平均风速;两地间的风速平均差值为3.6米/秒,这种差值因风向而不同。
In Researching desert and estimation of moving velocity of sand dunes one often use wind speed data of adjacent meteorological stations, but there exist differences in wind regimes at different places. From wind velocity observation over sand dunes in gobi area outside Qiraa oasis it has found that the wind dorections in gobi area are close to that in interior of oasis,the frequency of wind direction deviation less than 45° is 90% ;the average wind velocities in gobi area are obviously greater than that in interior of oasis,their mean difference is 3. 6m/s;this difference varies with wind directions.
出处
《中国沙漠》
CSCD
北大核心
1990年第3期33-39,共7页
Journal of Desert Research