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Warning

The following MARS retrieval is provided only  as an example of the sort of change that users will need to make once the data are provided in GRIB2.   

There is no need to re-specify the param keyword in the second and third retrieve blocks as it will be inherited from the first retrieve block.  It is included here only to illustrate the changes needed.  All that needs to change is the value of the timespan keyword.


Retrieval of maximum and minimum 2m temperature in GRIB1Retrieval of maximum and minimum 2m temperature in GRIB2


HTML
<pre>
retrieve,
  class=od,
  stream=oper,
  expver=1,
  date=-2,
  time=00:00:00,
  type=fc,
  levtype=sfc,
  <b><font color="red">param=201/202</font></b>,       <b><font color="red"># mx2t/mn2t</font></b>
  step=1/2/3/4/5/6,
  target="output_max_min_2t_1h.grib1"
retrieve,
  <b><font color="red">param=228026/228027</font></b>, <b><font color="red"># mx2t3/mn2t3</font></b>
  step=3/6,
  target="output_max_min_2t_3h.grib1"
retrieve,
  <b><font color="red">param=121/122</font></b>,       <b><font color="red"># mx2t6/mn2t6</font></b>
  step=6,
  target="output_max_min_2t_6h.grib1"

<pre>



HTML
<pre>
retrieve,
  class=od,
  stream=oper,
  expver=1,
  date=-2,
  time=00:00:00,
  type=fc,
  levtype=sfc,
  <b><font color="red">param=237167/238167</font></b>, <b><font color="red"># max_2t/min_2t</font></b> 
  <b><font color="red">timespan=1h</font></b>,         <b><font color="red"># previous hour</font></b> 
  step=1/2/3/4/5/6,
  target="output_max_min_2t_1h_3h.grib2"
retrieve,
  <b><font color="red">param=237167/238167</font></b>, <b><font color="red"># max_2t/min_2t</font></b>
  <b><font color="red">timespan=3h</font></b>,         <b><font color="red"># previous 3 hours</font></b> 
  step=3/6,
  target="output_max_min_2t.grib2"
retrieve,
  <b><font color="red">param=237167/238167</font></b>,  <b><font color="red"># max_2t/min_2t</font></b>
  <b><font color="red">timespan=6h</font></b>,          <b><font color="red"># previous 6 hours</font></b>
  step=6,
  target="output_max_min_2t_6h.grib2"
<pre>


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