求青藏高原地区1月的平均潜热值

rolemodel

我想计算出1月31天每一天的高原平均潜热值，用的是NCEP/NOE的Latent heat net flux Daily高斯网格的资料，为什么算出来的值会有100多？我感觉不可能，又不知道哪里错了，程序如下：
begin
fo =addfile("/cygdrive/D/yanjiusheng/lunwenziliao/lhtfl.sfc.gauss.2008.nc","r")
vartwo := short2flt(fo->lhtfl)
xgrd2 = g2fsh_Wrap (vartwo,(/73,144/))
timetwo = fo->time
YYYYMMDD := cd_calendar(timetwo,-2)  
timestar2 = 20080101
timeend2 = 20080131
istar2 = ind(YYYYMMDD.eq.timestar2)
ilast2 = ind(YYYYMMDD.eq.timeend2)
flux2 = xgrd2(istar2:ilast2,25:40,70:105)
zAvgTimetwo = dim_avg_n_Wrap(flux2,(/1,2/))
print(zAvgTimetwo)

talkd

经纬度要加上{}
flux2 = xgrd2(istar2:ilast2,{25:40},{70:105})