Dataset: ESA Greenhouse Gases Climate Change Initiative (GHG_cci): Column-averaged CO2 from GOSAT generated with the SRFP (RemoTeC) algorithm (CO2_GOS_SRFP), v2.3.8#
Dataset identifier: esacci.GHG.satellite-orbit-frequency.L2.CO2.TANSO-FTS.GOSAT.SRFP.v2-3-8.r1
Data store: cciodp
How to open this dataset in AVL JupyterLab
cciodp_store = new_data_store('cciodp')
ds = cciodp_store.open_data('esacci.GHG.satellite-orbit-frequency.L2.CO2.TANSO-FTS.GOSAT.SRFP.v2-3-8.r1')
Bounding box map#
cciodp_store = new_data_store('cciodp')
ds = cciodp_store.open_data('esacci.GHG.satellite-orbit-frequency.L2.CO2.TANSO-FTS.GOSAT.SRFP.v2-3-8.r1')
Map tiles and data from OpenStreetMap, under the ODbL.
Basic information#
Parameter | Value |
---|---|
Bounding box longitude (°) | -180.0 to 180.0 |
Bounding box latitude (°) | -90.0 to 90.0 |
Time range | 2009-03-31 to 2015-12-30 |
Click here for full dataset metadata.
Variable list#
Click on a variable name to jump to the variable’s full metadata.
Variable | Long name | Units |
---|---|---|
solar_zenith_angle | Solar zenith angle | degrees |
sensor_zenith_angle | Sensor zenith angle | degrees |
pressure_levels | pressure levels | hPa |
pressure_weight | pressure weight | 1 |
xco2 | column-average dry-air mole fraction of atmospheric carbon dioxide | 1e-6 |
xco2_uncertainty | 1-sigma uncertainty of the retrieved column-average dry-air mole fraction of atmospheric carbon dioxide | 1e-6 |
xco2_averaging_kernel | normalized column averaging kernel | 1 |
co2_profile_apriori | a priori dry-air mole fraction profile of atmospheric carbon dioxide | 1e-6 |
xco2_quality_flag | xch4_quality flag | 1 |
flag_landtype | flag for land / ocean soundings | 1 |
flag_sunglint | flag for normal / sunglint soundings | 1 |
gain | gain | 1 |
exposure_id | exposure id | 1 |
signal_to_noise_window | signal to noise ratio | 1 |
dry_airmass_layer | Dry airmass per layer | m-2 |
altitude | Altitude | m |
air_temperature | Air temperature at each level | K |
surface_altitude_stdv | Standard deviation of the surface elevation | m |
x_wind | grid_eastward_wind | m s-1 |
y_wind | grid_northward_wind | m s-1 |
chi2 | Chi-squared | 1 |
optical_thickness_of_atmosphere_layer_due_to_ambient_aerosol | Aerosol optical thickness per retrieval window | 1 |
raw_xco2 | Raw retrieved XCO2 column | 1e-6 |
raw_xco2_err | Raw uncertainty on the XCO2 total column | 1e-6 |
h2o_column | H2O total column | m-2 |
surface_albedo_758 | Surface albedo at 758 nm | 1 |
surface_albedo_1593 | Surface albedo at 1593 nm | 1 |
surface_albedo_1629 | Surface albedo at 1629 nm | 1 |
surface_albedo_2042 | Surface albedo at 2042 nm | 1 |
intensity_offset_o2a | Intensity offset in the O2A-band | W cm-2 |
aerosol_size | Retrieved size parameter of the aerosol distribution | 1 |
aerosol_central_height | Retrieved aerosol peak height | m |
aerosol_total_column | Retrieved aerosol total column | m-2 |
Full variable metadata#
solar_zenith_angle#
Field | Value |
---|---|
comment | Solar zenith angle is the angle between the line of sight to the sun and the local vertical |
units | degrees |
long_name | Solar zenith angle |
standard_name | solar_zenith_angle |
orig_data_type | float32 |
fill_value | None |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | float32 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
sensor_zenith_angle#
Field | Value |
---|---|
comment | Sensor zenith angle is the angle between the line of sight to the sensor and the local vertical |
units | degrees |
long_name | Sensor zenith angle |
standard_name | sensor_zenith_angle |
orig_data_type | float32 |
fill_value | None |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | float32 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
pressure_levels#
Field | Value |
---|---|
comment | Pressure levels define the boundaries of the averaging kernel and mole fraction profile layers. Surface pressure is represented by the 1st element, i.e., profiles are ordered from surface to top of atmosphere. |
units | hPa |
long_name | pressure levels |
orig_data_type | float32 |
fill_value | None |
size | 3302 |
shape | 254, 13 |
chunk_sizes | 254, 13 |
file_chunk_sizes | 254, 13 |
data_type | float32 |
dimensions | sounding_dim, level_dim |
file_dimensions | sounding_dim, level_dim |
pressure_weight#
Field | Value |
---|---|
long_name | pressure weight |
units | 1 |
comment | Pressure weights are the layer dependent weights needed to apply the averaging kernels. |
orig_data_type | float32 |
fill_value | None |
size | 3048 |
shape | 254, 12 |
chunk_sizes | 254, 12 |
file_chunk_sizes | 254, 12 |
data_type | float32 |
dimensions | sounding_dim, layer_dim |
file_dimensions | sounding_dim, layer_dim |
xco2#
Field | Value |
---|---|
units | 1e-6 |
comment | Retrieved column-average dry-air mole fraction of atmospheric carbon dioxide (XCO2) in ppm |
long_name | column-average dry-air mole fraction of atmospheric carbon dioxide |
standard_name | dry_atmosphere_mole_fraction_of_carbon_dioxide |
orig_data_type | float32 |
fill_value | None |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | float32 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
xco2_uncertainty#
Field | Value |
---|---|
long_name | 1-sigma uncertainty of the retrieved column-average dry-air mole fraction of atmospheric carbon dioxide |
units | 1e-6 |
comment | 1-sigma uncertainty of the retrieved column-average dry-air mole fraction of atmospheric carbon dioxide (XCO2) in ppm |
orig_data_type | float32 |
fill_value | None |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | float32 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
xco2_averaging_kernel#
Field | Value |
---|---|
long_name | normalized column averaging kernel |
comment | The normalized column-averaging kernel represents the sensitivity of the retrieved XCO2 to the atmospheric carbon dioxide mole fraction depending on pressure (height). All values represent layer averages within the corresponding pressure levels. Values near one are ideal and indicate that the influence of the a priori is minimal. Profiles are ordered from surface to top of atmosphere. |
units | 1 |
orig_data_type | float32 |
fill_value | None |
size | 3048 |
shape | 254, 12 |
chunk_sizes | 254, 12 |
file_chunk_sizes | 254, 12 |
data_type | float32 |
dimensions | sounding_dim, layer_dim |
file_dimensions | sounding_dim, layer_dim |
co2_profile_apriori#
Field | Value |
---|---|
long_name | a priori dry-air mole fraction profile of atmospheric carbon dioxide |
units | 1e-6 |
comment | A priori dry-air mole fraction profile of atmospheric carbon dioxide in ppm (http://www.atmos-meas-tech.net/5/1349/2012/amt-5-1349-2012.html). All values represent layer averages within the corresponding pressure levels. Profiles are ordered from surface to top of atmosphere. |
orig_data_type | float32 |
fill_value | None |
size | 3048 |
shape | 254, 12 |
chunk_sizes | 254, 12 |
file_chunk_sizes | 254, 12 |
data_type | float32 |
dimensions | sounding_dim, layer_dim |
file_dimensions | sounding_dim, layer_dim |
xco2_quality_flag#
Field | Value |
---|---|
long_name | xch4_quality flag |
values | 0B, 1B; // byte |
units | 1 |
meanings | Quality flag for XCH4 retrieval |
comment | 0=good, 1=bad |
orig_data_type | int32 |
fill_value | 9223372036854775807 |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | int64 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
flag_landtype#
Field | Value |
---|---|
long_name | flag for land / ocean soundings |
units | 1 |
comments | 0 = land, 1 = ocean |
orig_data_type | int32 |
fill_value | 9223372036854775807 |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | int64 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
flag_sunglint#
Field | Value |
---|---|
long_name | flag for normal / sunglint soundings |
units | 1 |
comments | 0 = no glint, 1 = glint |
orig_data_type | int32 |
fill_value | 9223372036854775807 |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | int64 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
gain#
Field | Value |
---|---|
units | 1 |
comments | gain setting of the sensor, H = gain H, M = gain M |
long_name | gain |
DODS | strlen: 254, dimName: sounding_dim |
orig_data_type | bytes1024 |
size | 1 |
shape | 1 |
chunk_sizes | 1 |
file_chunk_sizes | 1 |
data_type | bytes1024 |
dimensions | |
file_dimensions |
exposure_id#
Field | Value |
---|---|
long_name | exposure id |
units | 1 |
comments | Exposure identification number of the sounding |
orig_data_type | int32 |
fill_value | 9223372036854775807 |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | int64 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
signal_to_noise_window#
Field | Value |
---|---|
long_name | signal to noise ratio |
units | 1 |
comments | The signal to noise ratio per retrieval window for both polarization directions. Window 1 ranges between 757 nm and 773 nm, Window 2 ranges between 1.59 um and 1.62 um, Window 3 ranges between 1.63 um and 1.65 um and Window 4 ranges between 2.04 um and 2.08 um |
orig_data_type | float32 |
fill_value | None |
size | 2032 |
shape | 254, 2, 4 |
chunk_sizes | 254, 2, 4 |
file_chunk_sizes | 254, 2, 4 |
data_type | float32 |
dimensions | sounding_dim, polarization_dim, window_dim |
file_dimensions | sounding_dim, polarization_dim, window_dim |
dry_airmass_layer#
Field | Value |
---|---|
long_name | Dry airmass per layer |
units | m-2 |
comments | The dry airmass per layer, units are molecules m-2 |
orig_data_type | float32 |
fill_value | None |
size | 3048 |
shape | 254, 12 |
chunk_sizes | 254, 12 |
file_chunk_sizes | 254, 12 |
data_type | float32 |
dimensions | sounding_dim, layer_dim |
file_dimensions | sounding_dim, layer_dim |
altitude#
Field | Value |
---|---|
standard_name | altitude |
long_name | Altitude |
units | m |
comments | Altitude is the surface elevation in meters |
orig_data_type | float32 |
fill_value | None |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | float32 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
air_temperature#
Field | Value |
---|---|
standard_name | air_temperature |
long_name | Air temperature at each level |
units | K |
comments | Air temperature is the bulk temperature of the air, not the surface (skin) temperature. |
orig_data_type | float32 |
fill_value | None |
size | 3302 |
shape | 254, 13 |
chunk_sizes | 254, 13 |
file_chunk_sizes | 254, 13 |
data_type | float32 |
dimensions | sounding_dim, level_dim |
file_dimensions | sounding_dim, level_dim |
surface_altitude_stdv#
Field | Value |
---|---|
long_name | Standard deviation of the surface elevation |
units | m |
comments | Standard deviation of the surface elevation within the area of the GOSAT sounding, as derived from the SRTM database |
orig_data_type | float32 |
fill_value | None |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | float32 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
x_wind#
Field | Value |
---|---|
standard_name | x_wind |
long_name | grid_eastward_wind |
units | m s-1 |
comments | \"x\" indicates a vector component along the grid x-axis, positive with increasing x. Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward_air_velocity.) |
orig_data_type | float32 |
fill_value | None |
size | 3302 |
shape | 254, 13 |
chunk_sizes | 254, 13 |
file_chunk_sizes | 254, 13 |
data_type | float32 |
dimensions | sounding_dim, level_dim |
file_dimensions | sounding_dim, level_dim |
y_wind#
Field | Value |
---|---|
standard_name | y_wind |
long_name | grid_northward_wind |
units | m s-1 |
comments | \"y\" indicates a vector component along the grid y-axis, positive with increasing y. Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward_air_velocity.) |
orig_data_type | float32 |
fill_value | None |
size | 3302 |
shape | 254, 13 |
chunk_sizes | 254, 13 |
file_chunk_sizes | 254, 13 |
data_type | float32 |
dimensions | sounding_dim, level_dim |
file_dimensions | sounding_dim, level_dim |
chi2#
Field | Value |
---|---|
units | 1 |
comments | Chi_squared value of the sounding |
long_name | Chi-squared |
orig_data_type | float32 |
fill_value | None |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | float32 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
optical_thickness_of_atmosphere_layer_due_to_ambient_aerosol#
Field | Value |
---|---|
standard_name | optical_thickness_of_atmosphere_layer_due_to_ambient_aerosol |
long_name | Aerosol optical thickness per retrieval window |
units | 1 |
comments | \"Layer\" means any layer with upper and lower boundaries that have constant values in some vertical coordinate. There must be a vertical coordinate variable indicating the extent of the layer(s). If the layers are model layers, the vertical coordinate can be model_level_number, but it is recommended to specify a physical coordinate (in a scalar or auxiliary coordinate variable) as well. The optical thickness is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient. The radiative flux is reduced by a factor exp(-optical_thickness) on traversing the path. A coordinate variable of radiation_wavelength or radiation_frequency can be specified to indicate that the optical thickness applies at specific wavelengths or frequencies. \"Aerosol\" means the suspended liquid or solid particles in air (except cloud droplets). \"Ambient aerosol\" is aerosol that has taken up ambient water through hygroscopic growth. The extent of hygroscopic growth depends on the relative humidity and the composition of the aerosol. The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. Window 1 ranges between 757 nm and 773 nm, window 2 ranges from 1.59 um and 1.62 um, window 3 ranges between 1.63 um and 1.65 um and window 4 ranges between 2.04 um and 2.08 um |
orig_data_type | float32 |
fill_value | None |
size | 1016 |
shape | 254, 4 |
chunk_sizes | 254, 4 |
file_chunk_sizes | 254, 4 |
data_type | float32 |
dimensions | sounding_dim, window_dim |
file_dimensions | sounding_dim, window_dim |
raw_xco2#
Field | Value |
---|---|
long_name | Raw retrieved XCO2 column |
units | 1e-6 |
comments | The retrieved raw XCO2 total column before bias correction |
orig_data_type | float32 |
fill_value | None |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | float32 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
raw_xco2_err#
Field | Value |
---|---|
long_name | Raw uncertainty on the XCO2 total column |
units | 1e-6 |
comments | The raw uncertainty due to measurement noise on the XCO2 total column |
orig_data_type | float32 |
fill_value | None |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | float32 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
h2o_column#
Field | Value |
---|---|
long_name | H2O total column |
units | m-2 |
comments | The retrieved H2O total column in units of molecules m-2 |
orig_data_type | float32 |
fill_value | None |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | float32 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
surface_albedo_758#
Field | Value |
---|---|
long_name | Surface albedo at 758 nm |
units | 1 |
comments | The retrieved surface albedo for window 1, at 758 nm |
orig_data_type | float32 |
fill_value | None |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | float32 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
surface_albedo_1593#
Field | Value |
---|---|
long_name | Surface albedo at 1593 nm |
units | 1 |
comments | The retrieved surface albedo for window 2, at 1593 nm |
orig_data_type | float32 |
fill_value | None |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | float32 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
surface_albedo_1629#
Field | Value |
---|---|
long_name | Surface albedo at 1629 nm |
units | 1 |
comments | The retrieved surface albedo for window 3, at 1629 nm |
orig_data_type | float32 |
fill_value | None |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | float32 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
surface_albedo_2042#
Field | Value |
---|---|
long_name | Surface albedo at 2042 nm |
units | 1 |
comments | The retrieved surface albedo for window 4 at 2042 nm |
orig_data_type | float32 |
fill_value | None |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | float32 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
intensity_offset_o2a#
Field | Value |
---|---|
long_name | Intensity offset in the O2A-band |
units | W cm-2 |
comments | The retrieved intensity offset in the O2A-band |
orig_data_type | float32 |
fill_value | None |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | float32 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
aerosol_size#
Field | Value |
---|---|
long_name | Retrieved size parameter of the aerosol distribution |
units | 1 |
comments | The size parameter is the exponent of the power-law slope of the aerosol size distribution |
orig_data_type | float32 |
fill_value | None |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | float32 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
aerosol_central_height#
Field | Value |
---|---|
long_name | Retrieved aerosol peak height |
units | m |
comments | Peak height of the aerosol Gaussian height distribution |
orig_data_type | float32 |
fill_value | None |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | float32 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
aerosol_total_column#
Field | Value |
---|---|
long_name | Retrieved aerosol total column |
units | m-2 |
comments | The retrieved total aerosol column in units of particles m-2 |
orig_data_type | float32 |
fill_value | None |
size | 254 |
shape | 254 |
chunk_sizes | 254 |
file_chunk_sizes | 254 |
data_type | float32 |
dimensions | sounding_dim |
file_dimensions | sounding_dim |
Full dataset metadata#
Field | Value |
---|---|
title | ESA Greenhouse Gases Climate Change Initiative (GHG_cci): Column-averaged CO2 from GOSAT generated with the SRFP (RemoTeC) algorithm (CO2_GOS_SRFP), v2.3.8 |
source | GOSAT L1B version v201 |
history | 30.08.2016 - product generated with RemoTeC v2.3.8 |
references | http://www.esa-ghg-cii.org/ http://onlinelibrary.wiley.com/doi/10.1002/jgrd.50332/abstract http://onlinelibrary.wiley.com/doi/10.1029/2011GL047888/abstract |
product_version | v2-3-8 |
comment | These data were produced at SRON Netherlands Institute for Space Research in the frame of the ESA GHG CCI project |
project | Climate Change Initiative - European Space Agency |
ecv | GHG |
institute | Netherlands Institute for Space Research |
processing_level | L2 |
product_string | SRFP |
data_type | CO2 |
sensor_id | TANSO-FTS |
platform_id | GOSAT |
abstract | The CO2_GOS_SRFP dataset comprises level 2, column-averaged dry-air mole fractions (mixing ratios) for carbon dioxide (XCO2), from the Thermal and Near Infrared Sensor for Carbon Observations (TANSO-FTS) NIR and SWIR spectra, onboard the Japanese Greenhouse gases Observing Satellite (GOSAT). It has been produced using the RemoTeC Full Physics (SRFP) algorithm, v2.3.8, by the Greenhouse Gases Climate Change Initiative (GHG_cci) project. This forms part of the GHG_cci Climate Research Data Package Number 4 (CRDP#4). The RemoTeC Full Physics (SRFP) algorithm has been jointly developed at SRON and KIT. A second product, generated using the OCFP (University of Leicester Full Physics) algorithm, is also available, and is considered the GHG_cci baseline product, whilst the SRFP product forms an 'alternative' product. It is advised that users who aren't sure whether to use the baseline or alternative product use the OCFP product. For more information on the differences between baseline and alternative algorithms please see the Greenhouse Gases CCI data products webpage. The data product is stored per day in a single NetCDF file. Retrieval results are provided for the individual GOSAT spatial footprints, no averaging having been applied. The product file contains the key standard products, i.e. the retrieved column averaged dry air mixing ratio XCO2 with bias correction, averaging kernels and quality flags, as well as secondary products specific for the RemoTeC algorithm. For further information, including details of the SRFP algorithm and the TANSO-FTS instrument, please see the associated product user guide (PUG) or the Algorithm Theoretical Basis Document. |
publication_date | 2018-03-19T20:56:38 |
uuid | e61704b00267405082fbd41bb710dd74 |
catalog_url | https://catalogue.ceda.ac.uk/uuid/e61704b00267405082fbd41bb710dd74 |
cci_project | GHG |