Commit f4e2e86b authored by Uwe Schulzweida's avatar Uwe Schulzweida
Browse files

Docu update.

parent 6e5ce653
......@@ -22,14 +22,16 @@ For a grid with 2N points between the poles (so 4N grid points in total around t
linear grid: the shortest wavelength is represented by 2 grid points → 4N ≃ 2(TL + 1)
quadratic grid: the shortest wavelength is represented by 3 grid points → 4N ≃ 3(TQ + 1)
cubic grid: the shortest wavelength is represented by 4 grid points → 4N ≃ 4(TC + 1)
@EndifMan
@C cubic grid: the shortest wavelength is represented by 4 grid points → 4N ≃ 4(TC + 1)
@IfDoc
@bold{linear grid}: the shortest wavelength is represented by 2 grid points → 4N $\simeq$ 2(TL + 1)
@bold{quadratic grid}: the shortest wavelength is represented by 3 grid points → 4N $\simeq$ 3(TQ + 1)
@bold{cubic grid}: the shortest wavelength is represented by 4 grid points → 4N $\simeq$ 4(TC + 1)
@EndifDoc
@C @bold{cubic grid}: the shortest wavelength is represented by 4 grid points → 4N $\simeq$ 4(TC + 1)
The quadratic grid is used by ECHAM and ERA15. ERA40 is using a linear Gaussian grid reflected by the TL notation.
......@@ -39,7 +41,7 @@ The following table shows the calculation of the number of latitudes and the tri
@bold{Gridtype} & @bold{Number of latitudes:} nlat & @bold{Triangular truncation:} ntr
linear & NINT((ntr*2 + 1)/2) & (nlat*2 - 1) / 2
quadratic & NINT((ntr*3 + 1)/2) & (nlat*2 - 1) / 3
@C cubic & NINT((ntr*4 + 1)/2) & (nlat*2 - 1) / 4
cubic & NINT((ntr*4 + 1)/2) & (nlat*2 - 1) / 4
@EndTable
@EndDescription
@EndModule
......
......@@ -4437,6 +4437,8 @@ static const std::vector<std::string> WindHelp = {
" ",
" quadratic grid: the shortest wavelength is represented by 3 grid points → 4N ≃ 3(TQ + 1)",
" ",
" cubic grid: the shortest wavelength is represented by 4 grid points → 4N ≃ 4(TC + 1)",
" ",
" The quadratic grid is used by ECHAM and ERA15. ERA40 is using a linear Gaussian grid reflected by the TL notation.",
" ",
" The following table shows the calculation of the number of latitudes and the triangular truncation for the different grid types:",
......@@ -4444,6 +4446,7 @@ static const std::vector<std::string> WindHelp = {
" Gridtype & Number of latitudes: nlat & Triangular truncation: ntr ",
" linear & NINT((ntr*2 + 1)/2) & (nlat*2 - 1) / 2",
" quadratic & NINT((ntr*3 + 1)/2) & (nlat*2 - 1) / 3",
" cubic & NINT((ntr*4 + 1)/2) & (nlat*2 - 1) / 4",
"",
"OPERATORS",
" dv2uv Divergence and vorticity to U and V wind",
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment