ncep再分析资料为啥画出来850的风比925的风小呢？

weety9394

python读取：
uwnd_925 = nc_u.variables['uwnd'][:, 1, lat_index_B:lat_index_E + 1, lon_index_B:lon_index_E + 1]
uwnd_850 = nc_u.variables['uwnd'][:, 2, lat_index_B:lat_index_E + 1, lon_index_B:lon_index_E + 1]
uwnd_700 = nc_u.variables['uwnd'][:, 3, lat_index_B:lat_index_E + 1, lon_index_B:lon_index_E + 1]

vwnd_925 = nc_v.variables['vwnd'][:, 1, lat_index_B:lat_index_E + 1, lon_index_B:lon_index_E + 1]
vwnd_850 = nc_v.variables['vwnd'][:, 2, lat_index_B:lat_index_E + 1, lon_index_B:lon_index_E + 1]
vwnd_700 = nc_v.variables['vwnd'][:, 3, lat_index_B:lat_index_E + 1, lon_index_B:lon_index_E + 1]

# 求平均风速
wnd_925 = np.sqrt(uwnd_925 ** 2 + vwnd_925 ** 2)
wnd_850 = np.sqrt(uwnd_850 ** 2 + vwnd_850 ** 2)
wnd_700 = np.sqrt(uwnd_700 ** 2 + vwnd_700 ** 2)

# plotplt.plot(year_list, wnd_925_y, 'r', lw=2.2, ls='-', c='red', label='925hPa')
plt.plot(year_list, wnd_850_y, 'r', lw=2.2, ls='-', c='blue', label='850hPa')
plt.plot(year_list, wnd_700_y, 'r', lw=2.2, ls='-', c='green', label='700hPa')

感觉也没有错

苏拉苏拉

925太贴地面，有可能数据失真

weety9394

苏拉苏拉 发表于 2021-3-30 13:57
925太贴地面，有可能数据失真

谢谢，似乎850和10m的风也没有差很多