variation of rail height
Distribution of height and height difference
interdecadal variation and interannual variation
Seasonal variation of diurnal variation
10 hPa geopotential height field
300 hPa geopotential height
500 hPa geopotential height
500 hPa geopotential height field
500hPa geopotential height
500-hPa geopotential height field
a ratio of height to thick