为什么我画的python极地风场图箭头都在中间。。

Fernando

代码如下
du = xr.open_mfdataset('F:/DATA/U/*.nc')
dv = xr.open_mfdataset('F:\\DATA\V\*.nc')
u=du['uwnd']
v=dv['vwnd']

us = du['uwnd'][:,:1,:,:]#[time] [level]
vs = dv['vwnd'][:,:1,:,:]#[time] [level]

umean=us.loc[us.time.dt.season=='JJA'].mean(dim='time').mean(dim='level')
vmean=vs.loc[vs.time.dt.season=='JJA'].mean(dim='time').mean(dim='level')


fig=plt.figure(figsize=(10, 10))
ax=plt.axes(projection=ccrs.NorthPolarStereo(central_longitude=-270))#指明该axes为北半球极地投影,central表述中心经度
box=[-180, 180, 23, 90]

ax.set_extent(box, crs=ccrs.PlateCarree(central_longitude=30))#确定范围，-180°到180°，30°到90°
scale='50m'
ax.coastlines(scale,linewidth=1.2)

theta = np.linspace(0, 2*np.pi, 100) #创建等差数列
center, radius = [0.5, 0.5], 0.5
verts = np.vstack([np.sin(theta), np.cos(theta)]).T
circle = mpath.Path(verts * radius + center)
ax.set_boundary(circle, transform=ax.transAxes)

lat=umean['lat']
lon=umean['lon']
lat= anomalies['lat']
lon= anomalies['lon']


Q = ax.quiver(lon[::2],lat[::2],umean[::2,::2],vmean[::2,::2],width=0.0018,scale=30,headwidth=4)

werewolf

地球要爆炸了。。。检查一下数据的经纬度

我不是卢姥爷

同样的问题。

JZMing

不知道解决没有，这个是因为要自己调整scale和width
参考如下plt.quiver(lon,lat,uc,vc,width=0.0035,scale=550,transform=ccrs.PlateCarree())