Ocean, Sea Ice and Iceberg Observations¶
The [oceanObservations]
, [seaIceObservations]
and
[icebergObservations]
sections of a configuration file contain options used
to point to the observations files and folders:
[oceanObservations]
## options related to ocean observations with which the results will be compared
# directory where ocean observations are stored
obsSubdirectory = observations/Ocean
sstSubdirectory = SST
sssSubdirectory = SSS
mldSubdirectory = MLD
ninoSubdirectory = Nino
mhtSubdirectory = MHT
meltSubdirectory = Melt
soseSubdirectory = SOSE
sshSubdirectory = SSH
argoSubdirectory = ARGO
schmidtkoSubdirectory = Schmidtko
# interpolation order for observations. Likely values are
# 'bilinear', 'neareststod' (nearest neighbor) or 'conserve'
interpolationMethod = bilinear
# The directories where observation climatologies will be stored if they need
# to be computed. If a relative path is supplied, it is relative to the output
# base directory. If an absolute path is supplied, this should point to
# cached climatology files on the desired comparison grid. If cached remapped
# files are supplied, there is no need to provide cached files before
# remapping.
climatologySubdirectory = clim/obs
remappedClimSubdirectory = clim/obs/remapped
...
[seaIceObservations]
## options related to sea ice observations with which the results will be
## compared
# directory where sea ice observations are stored
obsSubdirectory = observations/SeaIce
# interpolation order for observations. Likely values are
# 'bilinear', 'neareststod' (nearest neighbor) or 'conserve'
interpolationMethod = bilinear
# The directories where observation climatologies will be stored if they need
# to be computed. If a relative path is supplied, it is relative to the output
# base directory. If an absolute path is supplied, this should point to
# cached climatology files on the desired comparison grid. If cached remapped
# files are supplied, there is no need to provide cached files before
# remapping.
climatologySubdirectory = clim/obs
remappedClimSubdirectory = clim/obs/remapped
...
[icebergObservations]
## options related to iceberg observations with which the results will be
## compared
# directory where sea ice observations are stored
obsSubdirectory = observations/Icebergs
concentrationAltibergSH = Altiberg/Altiberg_1991-2017_20180308.nc
Files and Directories¶
The input directories are specified through a “base” subdirectory
obsSubdirectory
and either subdirectories or file names for each set of
observations. obsSubdirectory
is relative to baseDirectory
in the
diagnostics
section, while all file paths and other subdirectories are
relative to obsSubdirectory
. You will typically not need to change any
of these paths, since they are structured in a standard way following the
E3SM public data repository (see the Quick Start Guide for more details).
The directories for storing cached datasets before and afer remapping
(specified in climatologySubdirectory
and remappedClimSubdirectory
)
may be given any relative or absoltue path, but should typically be left as the
default values.
Remapping¶
Observational climatologies are remapped from the native grid (typically
global latitude/longitude or Antarctic stereographic) to common
comparison grids. The remapping can be performed with any of three methods:
bilinear
, neareststod
(nearest neighbor) or conserve
. Mapping
files are created with the ESMF_RegridWeightGen tool. The default method
is bilinear
and these are the mapping files distributed from the
E3SM public data repository. The conseve
method is know to be much
slower to compute and should only be used if it is necessary (e.g. because
remapped data will be checked for conservation).