clave.gs
/ 
Name
clave - Make climatological mean.
Synopsis
clave
var_in time1 time2
(ystart yend | -ylist y1,y2,...)
[var_out]
[-within]
Description
Make climatological mean. That is, data of particular term in each year are averaged for more than a year. To show help, simply run "clave"
Note
-
BE CAREFUL! Treatment of missing value is different between ver. 0.01 (old version) and ver. 0.02
- ver. 0.01: Resulting climatological mean for each location is set to missing value if the data are missing value at least for one year.
- after ver. 0.02: Resulting climatological mean for each location is set to non-missing value if the data are NOT missing value at least for one year.
Options
- var_in
- Variable or expression to be averaged. Do not insert space.
- time1 time2
- Seasonal time range. "%y", "%ypp" or "%ymm", which are replaced by a particular year, its next year, or its previous year, should be included. "%end" (end of month) may also be used. See example below:
| time1 | time2 | explanation |
|---|---|---|
| "01jan%y" | "01feb%y" | January-mean (including 01feb). |
| "01jan%y" | "%endjan%y" | January-mean (averaged only within January). |
| "01jun%y" | "%endaug%ypp" | JJA-mean. |
| "01dec%y" | "%endmar%ypp" | DJF-mean. |
| "01dec%ymm" | "%endmar%y" | DJF-mean (Year of Feb-Mar is a base year). |
- ystart1 yend
- Range of year to take climatological mean.
- -ylist y1,y2,...
- List of year to take climatological mean.
- var_out
- Variable name in which the resulting climatological mean values are stored.
- -within
- Do not use data outside year range with %ypp and/or %ymm.
Examples
(1) Draw January climatology of U in the 1980s.
ga-> clave u 01jan%y %endjan%y 1980 1989
(2) Store DJF climatology of ps between 1970 and 2000 to the variable clps and draw.
ga-> clave ps 01dec%y %endfeb%ypp 1970 1999 clps ga-> d clps
(1) Draw DJF climatology from monthly-mean U covering Jan/1990-Dec/1999.
ga-> clave u dec%y feb%ypp 1990 1999 -within
In this case, data of January and February in 1990 are used for averaging instead of those in 2000.
Script source code
- clave.gs (necessary)
- find.gsf (necessary)
- gettime.gsf (necessary)
- strrep.gsf (necessary)
- t2time.gsf (necessary)
- time2t.gsf (necessary)
- tsteps.gsf (necessary)