arkiana.sh File Reference

Module with functions for processing analysis fields in a continuous assimilation cycle. More...

Functions
	arkiana_archive ($1)
	Archive interpolated analysis and merge surface fields with the ones available from assimilation. More...
	arkiana_retrieve ($1, $2)
	Retrieve analysis from the configured sources for starting a model run. More...

Detailed Description

Module with functions for processing analysis fields in a continuous assimilation cycle.

This module provides functions for merging and archiving analysis fields coming from a continuous model assimilation cycle and interpolated from a parent model. It requires definition of the following environmental variables (explanation to be added):

• $MODEL_ARKI_FROM_PARENT
• $MODEL_N_PARENT
• $MODEL_SOIL_PARENT
• $MODEL_ARKI_FROM_ASSIM_SLOW
• $MODEL_N_ASSIM_SLOW
• $MODEL_ARKI_FROM_ASSIM_FAST
• $MODEL_N_ASSIM_FAST
• $MODEL_ARKI_TIMERANGE_ASSIM
• $MODEL_ARKI_TIMERANGE_FCAST
• $ARKI_DS_ASSIM
• $ARKI_DS_FCAST
• $ARKI_DS_INTER
• $MODEL_ASSIM_GP
• $MODEL_FCAST_GP (no?)
• $MODEL_INTER_GP (no?)
• $MODEL_ARKI_SURFT
• $MODEL_ARKI_LSM
• $MODEL_ARKI_BBC

Function Documentation

arkiana_archive

(

$1

)

Archive interpolated analysis and merge surface fields with the ones available from assimilation.

This function has to be called when the analysis for the current time ($DATE$TIME) from a previous assimilation cycle, if available, has been archived, and after the analysis for the current time has been interpolated from a parent model and is available as a plain file. It performs the following operations:

• it selects, from the interpolated analysis file, only those fields that should come from parent model as selected by the variable $MODEL_ARKI_FROM_PARENT and archives them for being used in the successive model run
• it checks the availability of so-called "slow" fields in the analysis, as selected by the variable $MODEL_ARKI_FROM_ASSIM_SLOW, and, if not available for the current time but found within an interval of $MODEL_SLOW_PAST_H hours in the past, it retrieves the most recent fields available, refreshes the date in grib fields and rearchives them for successive use
• if $MODEL_SOIL_PARENT != N, it merges parent model sea surface temperature with soil surface temperature from previous analysis, if available, and archives it, overwriting the original surface temperature from the analysis.

  Parameters

  $1	the name of the file containing parent model interpolated analysis

arkiana_retrieve	(		$1,
			$2
	)

Retrieve analysis from the configured sources for starting a model run.

This function retrieves the gridded analysis data for starting a model run from the configured arkimet datasets trying different sources for climatological, slow and fast data.

Parameters

$1	the name of the file containing parent model interpolated analysis, if empty it is not used
$2	the name of the output analysis file to be created