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title	solution

retrieve,
    class    = od,
    stream   = mnth,
    type     = analysis,
    time     = 06,
    date     = 19970200,
    levtype  = model level,
    param    = t,
    levelist = 1/to/31, 
    target   = "monthly"

Post-processing

Retrieve the 1000,500 and 300 hPa temperatures for tomorrow at noon from the 12 UTC forecast of two days ago on an N48 Gaussian Grid temperature on model levels 1, 2 and 3 for yesterday's 12 hour forecast. > see in Catalogue

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title	solution

retrieve, 
    type     = forecastfc, 
    paramdate    = t-1, 
    date time    = -212,
    step     = 4812, 
    gridlevtype = ml,
   = 48, 
   level  levelist = 10001/5002/3003,
    param levtype  = plt,
    target   = "t.gg.grb"

...

_ml_1_2_3"

Time and step

Retrieve the 1000 hPa geopotential from yesterday's 12 UTC forecast (> see in Catalogue) for:

the 12 hour forecast
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title solution
retrieve,

...

type

...

date =

...

time =

...

12, step

...

12, levtype

...

= pl,

...

level =

...

1000,

...

param =

...

z, target

...

z1000_a"
the 6, 12, 24 and 48 hour forecasts
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title solution
retrieve, type

...

= fc,

...

date =

...

time =

...

step =

...

12/24/

...

48, levtype

...

= pl,

...

level =

...

1000,

...

param

...

target

...

= "z1000_b"
the 12 hour to 240 hour forecasts at 12 hour intervals
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title solution
retrieve, type

...

Retrieve the 1000 and 500 hPa geopotential for 1200 yesterday from the analysis in the formats below (one job for each form): > see in Catalogue

leaving the data in its original form

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title	solution

retrieve,fc,
    typedate    = an-1,
    datetime    = -112,
    timestep    = 12/to/240/by/12,
    param  levtype = zpl,
 
   level  levtype = pressure level1000,
    levelparam   = 1000/500z,
    target  = "myfile1z1000_c"

all forecast time-stepsreducing the truncation to T106

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title	solution

retrieve,
    type    = anfc,
    date    = -1,
    time    = 12,
#   step param   = zall, 
# The value "all" levtypeis =convenient to pressureuse level,
but MARS can only levelreport on missing = 1000/500,
 steps if 
   resol   = 106,
    target  = "myfile1"

converting the data to a global N48 Gaussian grid

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title	solution

retrieve,
    type # the full =list an,
of steps is specified:
 date    = -1,
step     param   = z, 
    levtype = pressure level,
    level   = 1000/500,
    grid    = 48,
    target  = "myfile1"= 0/1/2/3/4/5/6/7/8/9/10/11/12/13/14/15/16/17/18/19/20/21/22/23/24/25/26/27/28/29/30/31/32/33/34/35/36/37/38/39/40/41/42/43/44/45/46/47/48/49/50/51/52/53/54/55/56/57/58/59/60/61/62/63/64/65/66/67/68/69/70/71/72/73/74/75/76/77/78/79/80/81/82/83/84/85/86/87/88/89/90/93/96/99/102/105/108/111/114/117/120/123/126/129/132/135/138/141/144/150/156/162/168/174/180/186/192/198/204/210/216/222/228/234/240,
    levtype = pl,
    level   = 1000,
    param   = z,
    target  = "z1000_d"

Post-processing

Retrieve the 1000,500 and 300 hPa temperatures for tomorrow at noon from the 12 UTC forecast of two days ago on an N48 Gaussian Grid > see in Catalogue

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title	solution

retrieve, 
    type     = forecast, 
    param    = t, 
    date     = -2,
    step     = 48, 
    grid     = 48, 
    levelist = 1000/500/300,
    levtype  = pl,
    target   = "t.gg.grb"

Retrieve the same on a latitude/longitude grid, 1.5 by 1.5 degrees. > see in Catalogue

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title	solution

retrieve, 
    type     = forecast,
    param    = t,
    date     = -2,
    levelist = 1000/500/300,
    levtype  = pl,
    step     = 48,
    grid     = 1.5/1.5,
    target   = "t.ll.grb"

Retrieve Europe in the same way as in the previous retrieval. Compare the size of the resulting file with the previous one. > see in Catalogue

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title	solution

retrieve,
    type     = fc,
    param    = t,
    date     = -2,
    levelist = 1000/500/300,
    levtype  = pl,
    step     = 48,
    grid     = 1.5/1.5,
    area     = e,
    target   = "t.europe"

Retrieve the 1000 and 500 hPa geopotential for 1200 yesterday from the analysis in the formats below (one job for each form): > see in Catalogue

leaving the data in its original form

Expand

title	solution

retrieve,
    type    = an,
    date    = -1,
    time    = 12,
    param   = z, 
    levtype = pressure level,
    level   = 1000/500,
    target  = "myfile1"

reducing the truncation to T106

Expand

title	solution

retrieve,
    type    = an,
    date    = -1,
    time    = 12,
    param   = z, 
    levtype = pressure level,
    level   = 1000/500,
    resol   = 106,
    target  = "myfile1"

converting the data to a global N48 Gaussian grid

Expand

title	solution

retrieve,
    type    = an,
    date    = -1,
    param   = z, 
    levtype = pressure level,
    level   = 1000/500,
    grid    = 48,
    target  = "myfile1"

converting the data to a regular 5.0 by 5.0 degree global latitude/longitude grid
Expand
title solution
retrieve
converting the data to a regular 5.0 by 5.0 degree global latitude/longitude grid
Expand
title solution
retrieve, type = an, date = -1, param = z, levtype = pressure level, level = 1000/500, grid = 5.0/5.0, target = "myfile1"

converting the data to an N80 Gaussian grid for the European area

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title	solution

retrieve,
    type    = an,
    date    = -1,
    param   = z, 
    levtype = pressure level,
    level   = 1000/500,
    grid    = 80,
    area    = europe,
    target  = "myfile1"

converting the data to an N80 Gaussian grid for the area from 50 degrees North to 10 degrees North, and 20 degrees West to 20 degrees East

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title	solution

retrieve,
    type    = an,
    date    = -1,
    param   = z, 
    levtype = pressure level,
    level   = 1000/500,
    grid    = 80,
    area    = 50/-20/10/20,
    target  = "myfile1"

converting the data to the same area but convert it to a 2.5 degree by 2.5 degree latitude/longitude grid

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title	solution

retrieve,
    type    = an,
    date    = -1,
    param   = z, 
    levtype = pressure level,
    level   = 1000/500,
    grid    = 2.5/2.5,
    area    = 50/-20/10/20,
    target  = "myfile1"

Retrieve surface winds for yesterday's 24 hour forecast on the European area converting to a 0.57 by 0.57 degrees latitude/longitude grid. > see in Catalogue
What happens to the conversion? (solution)

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title	solution

retrieve,
    type    = fc,
    date    = -1,
    time    = 12,
    step    = 24,
    levtype = sfc,
    param   = 10u/10v,
    area    = europe,       # As the area not compatible with the grid,
    grid    = 0.57/0.57,    # MARS will expand the area to make = 0.57/0.57,it fit.
    target  = "10u_10v"

Observations

...

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title	solution

retrieve,
    class   = e4,
    stream  = moda,
    type    = an,
    levtype = sfc,
    date    = 19640101,
    param   = 69.162/70.162,
    area    = europe    = an,
    levtype = sfc,
    griddate    = 1.125/1.12519640101,
    target  = "e4_moda_fluxes.grb"

...

the 12 hour forecast (solution)
the 6, 12, 24 and 48 hour forecasts (solution)
the 12 hour to 240 hour forecasts at 12 hour intervals (solution)
all forecast time-steps (solution)

...

param   = 69.162/70.162,
    area    = europe,
    grid    = 1.125/1.125,
    target  = "e4_moda_fluxes.grb"

Retrieve the temperature from model levels 1 and 2 for 1800 on 18th October 1991 from the uninitialised analysis. Try some or all of the above conversions. (solution)

Retrieve the 2 metre temperature and dewpoint for yesterday's four analysis times. Try some or all of the above conversions. (Conversion to spherical harmonics is not possible.)

...

(solution)

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Versions Compared

Old Version 9

New Version 10

Key

Post-processing

Time and step

Post-processing

Observations