The tThe following MARS requests can be used as a tutorial. The links into the MARS Catalogue might be helpful to create a valid retrieve script. However, the dates might need to be adapted.
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Retrieve 1000,850,700 and 500 hPa temperatures from the 15th of February 1999 12 UTC Analysis > see in MARS Catalogue
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retrieve, class = od, type = an, expver = 1, date = 19990215, time = 12, param = t, levtype = pressure level, levelist = 1000/850/700/500, target = "t.grb" |
Retrieve wind components for tomorrow at 12:00 and 18:00 from yesterday's 12Z forecast at all 137 model levels > see in MARS Catalogue
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retrieve, type = forecast, param = u/v, levtype = model level, levelist = 1/to/137, date = -1, time = 12, step = 48/54, target = "wind" |
Retrieve geopotential and surface pressure for yesterday's analysis cycles (00,06,12,18) > see in MARS Catalogue
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retrieve, class = od, type = analysis, levtype = surface, date = -1, time = 00/06/12/18, param = z/sp, target = "all.an" |
Retrieve surface pressure and surface thermal radiation downwards at every 12-hour time-step for the 12Z forecast from two days ago > see in MARS Catalogue
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retrieve, type = forecast, param = sp/str, date = -2, step = 12/to/240/by/12, time = 12, levtype = sfc, target = "sfc.grb" |
Retrieve the operational monthly mean model level temperature (all levels) from the 06:00 analysis for February 1997 > see in MARS Catalogue
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retrieve, class = od, stream = mnth, type = analysis, time = 06, date = 19970200, levtype = model level, param = t, levelist = 1/to/31, target = "monthly" |
Retrieve the temperature on model levels 1, 2 and 3 for yesterday's 12 hour forecast. > see in MARS Catalogue
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retrieve, type = fc, date = -1, time = 12, step = 12, levtype = ml, level = 1/2/3, param = t, target = "t_ml_1_2_3" |
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Retrieve the 1000 hPa geopotential from yesterday's 12 UTC forecast (> see in MARS Catalogue) for:
the 12 hour forecast
Expand title solution retrieve, type = fc, date = -1, time = 12, step = 12, levtype = pl, level = 1000, param = z, target = "z1000_a"
the 6, 12, 24 and 48 hour forecasts
Expand title solution retrieve, type = fc, date = -1, time = 12, step = 6/12/24/48, levtype = pl, level = 1000, param = z, target = "z1000_b"
the 12 hour to 240 hour forecasts at 12 hour intervals
Expand title solution retrieve, type = fc, date = -1, time = 12, step = 12/to/240/by/12, levtype = pl, level = 1000, param = z, target = "z1000_c"
all forecast time-steps
Expand title solution retrieve, type = fc, date = -1, time = 12, # step = all, # The value "all" is convenient to use but MARS can only report on missing steps if
# the full list of steps is specified:
step = 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"
ENS Overlap
Retrieve Total Precipitation, perturbed forecast overlap
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See also FAQ: "How can I compute the accumulation using data from the overlap stream?"
Post-processing
Retrieve the 1000,500 and 300 hPa temperatures for today at noon from the 12 UTC forecast of two days ago on an N48 Gaussian Grid > see in MARS Catalogue
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retrieve, type = forecast, param = t, date = -2, time = 12, step = 48, grid = N48, 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 MARS Catalogue
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retrieve, type = forecast, param = t, date = -2, time = 12, 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 MARS Catalogue
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retrieve, type = fc, param = t, date = -2, time = 12, 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 MARS 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"
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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 MARS Catalogue
What happens to the conversion?
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retrieve, type = fc, date = -1, time = 12, step = 24, levtype = sfc, param = 10u/10v, area = europe, # As the area is not compatible with the grid, grid = 0.57/0.57, # MARS will expand the area to make it fit. target = "10u_10v" |
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Observations
Retrieve all the sea surface observations for the 1st February 2015. > see in MARS Catalogue
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retrieve, type = ob, |
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Retrieve the surface temperature fields of the first 10 members of yesterday's 12 UTC ensemble prediction (type: perturbed forecast) for the next 3 days at noon. > see in MARS Catalogue
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retrieve,
class = od,
stream = ef,
type = perturbed forecast,
levtype = sfc,
repres = gg,
date = -1,
time = 12,
ensemble = 1/to/10,
step = 48/to/96/by/24,
param = |
Retrieve the same for the control forecast. > see in MARS Catalogue
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retrieve, class = od, stream = ef, type = control forecast, levtype = sfc, repres = gg, date = -1, time = 12, step = 48/to/96/by/24, param = st, target = "ensemble.cf" |
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Retrieve the vertical integral of eastward and northward heat flux as monthly means of daily means on a 1.125 by 1.125 degree latitude/longitude grid over Europe from the ERA 40 archive for January 1964 > see in MARS Catalogue
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retrieve, class = e4, stream = moda, type = an, levtype = sfc, date = 19640101, param = 69.162/70.162, area = europe, grid = 1.125/1.125, target = "e4_moda_fluxes.grb" |
Retrieval of snow depth from the ERA-40 archive for November 1993, for all analysis base times > see in MARS Catalogue. How many fields are requested?
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retrieve, class = e4, stream = oper, expver = 1, date = 19931101/to/19931130, time = 00/06/12/18, type = an, levtype = sfc, param = sd, repres = gg, target = "era40.199311.sd" # It retrieves 30 x 4 = 120 fields. |
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See also these Web API retrieve examples for ERA-Interim, S2S, TIGGE, ERA-20C etc.