Page History

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Repeat the previous retrieves for the same month but in 1994. (solution)

Retrieve surface pressure and surface thermal radiation downwards at every 12-hour time-step for the 12Z forecast from two days ago  > see in Catalogue

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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

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

• reducing the truncation to T106

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  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

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  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

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  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. What happens to the conversion? (solution)

retrieve,
    type    = fc,
    date    = -1,
    time    = 12,
    step    = 24,
    levtype = sfc,
    param   = 10u/10v,
    area    = europe,
    grid    = 0.57/0.57,
    target  = "10u_10v"

Observations

Retrieve all the sea surface observations for the 1st February 2015.  > see in 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"

• 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)
• Retrieve the 1000 hPa geopotential from yesterday's forecast for:
  • 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)
• Retrieve the temperature on model levels 1, 2 and 3 for yesterday's 12 hour forecast. (solution)
• 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. What happens to the conversion? (solution)