太平洋海面粗糙度的计算及在ENSO期间的变化

利用TOPEX高度计风速资料,实现了对太平洋海面粗糙度(z0)的计算。1997~1999年正是厄尔尼诺与拉尼娜事件发生时期,作者研究了1997~1999年z0在ENSO期间的变化后发现:(1)EI Nion发生期间赤道附近z0最大值在A,C,B 3个站点上移动;最小值在B,A 2个站点上移动。(2)Li Nina发生期间赤道附近z0最小值在A站点,最大值主要在B站点上。Li Nina发生期间,1999年15个站点z0均大于正常年份和EI Nion发生期间的15个站点z0。(3)ENSO期间,四季z0与正常年份相比都有显著改变。

Calculation and ahanging of roughness of sea surface in Pacific Ocean in ENSO period

We calculated values of roughness in 15 points using wind speed by TOPEX satellite Altimeter.We studied the changes of roughness during 1997~1999(ENSO period) and compared them with roughness in 1996.We find some characteristics as follows: The largest roughness nearby equator is moving from station A to station C to station B and the smallest roughness is moving from station B to station A during the EI Nion period.The smallest roughness is in station A and the largest roughness is in station B during LI Nina period.The roughness of 15 stations in 1999 is bigger than those in 1996,1997,1998.The roughness of 4 seasons has prominent change during ENSO period when compared with 1996.