排序方式: 共有2条查询结果,搜索用时 15 毫秒
1
1.
The marine atmospheric boundary layer (MABL) plays a vital role in the transport of momentum and
heat from the surface of the ocean into the atmosphere. A detailed study on the MABL characteristics was
carried out using high-resolution surface-wind data as measured by the QuikSCAT (Quick scatterometer) satellite.
Spatial variations in the surface wind, frictional velocity, roughness parameter and drag coefficient for the
different seasons were studied. The surface wind was strong during the southwest monsoon season due to the
modulation induced by the Low Level Jetstream. The drag coefficient was larger during this season, due to
the strong winds and was lower during the winter months. The spatial variations in the frictional velocity
over the seas was small during the post-monsoon season (~0.2 m s-1). The maximum spatial variation in the
frictional velocity was found over the south Arabian Sea (0.3 to 0.5 m s-1) during the southwest monsoon period,
followed by the pre-monsoon over the Bay of Bengal (0.1 to 0.25 m s-1). The mean wind-stress curl during the winter
was positive over the equatorial region, with a maximum value of 1.5×10-7N m-3, but on either side of the equatorial belt, a negative wind-stress curl dominated. The area average of the frictional velocity and drag coefficient over the Arabian Sea and Bay of Bengal were also studied. The values of frictional velocity
shows a variability that is similar to the intraseasonal oscillation (ISO) and this was confirmed via wavelet
analysis. In the case of the drag coefficient, the prominent oscillations were ISO and quasi-biweekly mode (QBM).
The interrelationship between the drag coefficient and the frictional velocity with wind speed in both the Arabian
Sea and the Bay of Bengal was also studied. 相似文献
2.
在河北秦皇岛柳江盆地鸡冠山新元古界青白口系长龙山组石英砂岩中发现有海绿石.对海绿石宏观特征分析表明,砂岩中海绿石的含量随着颗粒直径的减小而增大,含量大多为5%~20%.综合野外露头勘验、岩石薄片显微镜下观察和样品扫描电镜观察,对海绿石微观特征分析表明,长龙山组大多为晕边状和颗粒状,也可见其他形态,分析认为该区海绿石属于... 相似文献
1