我的浮点型数据转换为short型，就变成0了。。。。

DABEIGE

load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
load"$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"

f1=addfile("C:/Users/Administrator/Desktop/data/uwnd.1987.nc","r")
g1=addfile("C:/Users/Administrator/Desktop/data/vwnd.1987.nc","r")
U=f1->uwnd(181:211,13,30:35,80:100)
V=g1->vwnd(181:211,13,30:35,80:100)
Lat=U&lat
Lon=U&lon
div=uv2dv_cfd(U,V,Lat,Lon,0)
Div=dim_avg_n_Wrap(div,0)
index=wgt_areaave(Div,1.0,1.0,0)
index@_FillValue= -9.96921e+36
b=floattoshort(index)
print(b)
Variable: b
Type: short
Total Size: 2 bytes
            1 values
Number of Dimensions: 1
Dimensions and sizes:   [1]
Coordinates:
Number Of Attributes: 1
  _FillValue :  -32767
(0)     0