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changes.mady.by.user Carsten Maass

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  • grid = F160  - full (or regular) Gaussian grid with 160 latitude lines between the pole and equator
  • grid = N320  - ECMWF original reduced Gaussian grid with 320 latitude lines between the pole and equator, see Reduced Gaussian Grids for grid numbers used at ECMWF
  • grid = O640 - ECMWF octahedral (reduced) Gaussian grid with 640 latitude lines between the pole and equator

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Octahedral reduced Gaussian (O grids)O1280O1024O640O512O400O320O256O200O160O128O96O80O64O48O32
Original reduced Gaussian  (N grids)N1280N1024N640N512N400N320N256N200N160N128N96N80N64N48N32
Regular (Full) Gaussian (F grids)F1280F1024F640F512F400F320F256F200F160F128F96F80F64F48F32


MARS requests specifying an unsupported grid will fail. For example, a retrieval request with grid=O123 will return an error.  If the letter denoting the type of Gaussian grid is omitted, e.g. grid=320, a full (or regular) Gaussian grid with 320 grid lines is returned.

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grid = av,           # will return the archived model grid
grid = 0.1251/0.125,    1,            # will return an 0.125 1 x 0.125 1 deg longitude/latitude grid
grid = F320,                 # will return a full Gaussian grid with 320 latitude lines between the pole and equator

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