- 追加された行はこの色です。
- 削除された行はこの色です。
this height, when multiplied by the area fraction of the grid cell covered by
ocean (or sea ice), yields the volume of sea water above the geoid. As
defined here, "the geoid" is a surface of constant geopotential that, if the
ocean were at rest, would coincide with mean sea level. Under this
definition, the geoid changes as the mean volume of the ocean changes
(e.g., due to glacial melt, or global warming of the ocean). Report zos as
"missing" over grid cells that are entirely land.
There are a couple of acceptable options for reporting this field:
- 1) if the geoid is defined to
relate to the instantaneous volume of the ocean, the global mean of zos will
always be zero,
- 2) if the geoid is defined relative to a time-mean sea level over some period, then the global mean of zos will be timedependent.
In either case a global mean time-series of sea level should also
be reported as described in the next two table entries immediately below.
&color(red){In general IPCC analysis of global mean sea level changes will not rely on zos.}; It is recommended that in reporting zos, the atmospheric "inverted
barometer" effect be omitted, since it can be easily calculated from the
reported mean sea level pressure field. The "comment" attribute associated
with zos should indicate whether or not the atmospheric "inverted
barometer" influence on zos has been included. Additionally, it should be
noted in the "comment" attribute whether zos is obtained directly, as in a
free-surface model, or has been derived, for example, from geostrophy
using diagnosed velocities at some level or from geostrophy relative to an
assumed level of quiescence.
* Data [#ba8e96a0]
- bccr_bcm2_0
-- zos:comment = ?
- cccma_cgcm3_1
-- rigid-lid model
-- zos:comment = "The inverted barometer correction has not been applied. Zos has been inverted from surface pressure gradients computed internally during the model run based on full ocean model dynamics."
- gfdl_cm2_0
-- zos:comment = "Note: This model output is presented on the model's tripolar grid. The North Pole singularity is avoided by using this nonregular grid north of 65N. More information about the ocean and sea ice models' grid can be found at http://nomads.gfdl.noaa.gov/. equivalent sea surface height above geoid after melting any overlying sea ice and snowNote: Values north of 65N have been interpolated from the model's native tripolar grid to a regular grid. Information about the interpolation is available at http://nomads.gfdl.noaa.gov/CM2.X/oceangrid.html. In particular note that the seaarea field must be used to assure conserving area integrals."
- gfdl_cm2_1
-- zos:comment = "Note: Values north of 65N have been interpolated from the model's native tripolar grid to a regular grid. Information about the interpolation is available at http://nomads.gfdl.noaa.gov/CM2.X/oceangrid.html. In particular note that the seaarea field must be used to assure conserving area integrals."
- giss_aom
-- zos:comment = "&color(red){includes fresh water equivalent of sea ice and inverted barometer effect};"
- giss_model_e_r
-- zos:comment = ?
- iap_fgoals1_0_g
-- zos:comment = ?
- ipsl_cm4
-- zos:comment = ?
- miroc3_2_hires
-- zos:comment = "This zos is not influenced by inverted barometer, and obtained directly from a free-surface model."
- miroc3_2_medres
-- zos:comment = ?
- miub_echo_g
-- zos:comment = "The sea surface elevation is defined relative to the volume the ocean would occupy when at rest with the Levitus climatologigal annual mean stratification. Almospheric inverted barometer influence is not included. Calculated directly (free surface model."
- mpi_echam5
-- zos:comment = ?
- mri_cgcm2_3_2a
-- rigid-lid model
-- zos:comment = ?
- ncar_ccsm3_0
-- zos:comment = ?
- ncar_pcm1
- ukmo_hadcm3
-- rigid-lid model
-- zos:comment = ?
- ukmo_hadcm3
-- zos:comment = ?
