如何用Cartopy绘制洋流

import cartopy.crs as ccrs
import cartopy.feature as cfeature
import matplotlib.pyplot as plt

# 准备洋流数据
# 流速数据
u = [[1.2, 1.5, 1.8],
     [0.8, 1.2, 1.5],
     [0.5, 0.8, 1.2]]
v = [[-0.5, -0.8, -1.2],
     [-0.8, -1.2, -1.5],
     [-1.2, -1.5, -1.8]]
# 经纬度网格
lon = [[100, 101, 102],
       [100, 101, 102],
       [100, 101, 102]]
lat = [[30, 30, 30],
       [31, 31, 31],
       [32, 32, 32]]

# 创建地图
fig = plt.figure(figsize=(10, 6))
ax = fig.add_subplot(1, 1, 1, projection=ccrs.PlateCarree())

# 绘制地图背景
ax.add_feature(cfeature.LAND)
ax.add_feature(cfeature.COASTLINE)

# 绘制洋流箭头
ax.quiver(lon, lat, u, v, transform=ccrs.PlateCarree())

# 设置地图范围
ax.set_extent([99, 103, 29, 33], crs=ccrs.PlateCarree())

# 显示图形
plt.show()