Difference between revisions of "time ref"
m (TIME REF moved to time ref: We are listing these under variable names not .in keywords) (change visibility) |
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= | <div class="title">time_ref</div> | ||
{{#lst:Variables|time_ref}} | |||
---- | |||
Reference time used to define the "units" attribute written to the output netcdf files. | Reference time used to define the "units" attribute written to the output netcdf files. | ||
For so-called realistic applications where the model time corresponds to a certain calendar date, | For so-called realistic applications where the model time corresponds to a certain calendar date, '''time_ref''' will be a floating point number > 0 in the format (yyyymmdd.f) | ||
For example, TIME_REF=20020115.5 will yield the following | For example, setting <span class="blue">TIME_REF</span>=20020115.5 in your [[ocean.in]] will yield the following [http://www.cgd.ucar.edu/cms/eaton/cf-metadata/CF-1.0.html CF-Comliant] time units attribute: | ||
units = "seconds since 2002-01-15 12:00:00" | units = "seconds since 2002-01-15 12:00:00" | ||
There are some default special values for TIME_REF: | There are some default special values for <span class="blue">TIME_REF</span>: | ||
If TIME_REF = -2, model time and DSTART are in modified Julian | If <span class="blue">TIME_REF</span> = -2, model time and [[dstart|DSTART]] are in modified Julian days units. The "units" attribute becomes: | ||
days units. The "units" attribute becomes: | |||
units = "since 1968-05-23 00:00:00 GMT: | units = "since 1968-05-23 00:00:00 GMT: | ||
If TIME_REF = -1, model time and DSTART are in a calendar | If <span class="blue">TIME_REF</span> = -1, model time and [[dstart|DSTART]] are in a calendar with 360 days in every year (30 days each month). The "units" attribute is: | ||
with 360 days in every year (30 days each month). The "units" | |||
attribute is: | |||
units = "seconds since 0000-01-01 00:00:00" | units = "seconds since 0000-01-01 00:00:00" | ||
If TIME_REF = 0, model time and DSTART are in a common year | If <span class="blue">TIME_REF</span> = 0, model time and [[dstart|DSTART]] are in a common year calendar with 365.25 days. The "units" attribute is: | ||
calendar with 365.25 days. The "units" attribute is: | |||
units = "seconds since 0000-01-01 00:00:00" | units = "seconds since 0000-01-01 00:00:00" | ||
There are several user postings about time keeping in ROMS on the [http://marine.rutgers.edu/po/users/forum/viewtopic.php?t=69 User Forum] | |||
There are several user | |||
Revision as of 19:46, 31 March 2008
- time_ref
- Reference time (yyyymmdd.f) used to compute relative time: elapsed time interval since reference-time.
- option =
- routine = mod_scalars.F
- keyword = TIME_REF
- input = roms.in
Reference time used to define the "units" attribute written to the output netcdf files.
For so-called realistic applications where the model time corresponds to a certain calendar date, time_ref will be a floating point number > 0 in the format (yyyymmdd.f)
For example, setting TIME_REF=20020115.5 in your ocean.in will yield the following CF-Comliant time units attribute:
units = "seconds since 2002-01-15 12:00:00"
There are some default special values for TIME_REF:
If TIME_REF = -2, model time and DSTART are in modified Julian days units. The "units" attribute becomes:
units = "since 1968-05-23 00:00:00 GMT:
If TIME_REF = -1, model time and DSTART are in a calendar with 360 days in every year (30 days each month). The "units" attribute is:
units = "seconds since 0000-01-01 00:00:00"
If TIME_REF = 0, model time and DSTART are in a common year calendar with 365.25 days. The "units" attribute is:
units = "seconds since 0000-01-01 00:00:00"
There are several user postings about time keeping in ROMS on the User Forum
