Description:

Version 11.0 is the current version of the Atmospheric Carbon Observations from Space (ACOS) retrieval product as applied to the Greenhouse Gases Observing Satellite (GOSAT) as part of close partnership between The Orbiting Carbon Observatories (OCO) and GOSAT. Older versions will no longer be available and are superseded by Version 11.0. The ACOS Lite files contain bias-corrected column-integrated dry air mole fraction of carbon dioxide (XCO2) along with other select fields aggregated as daily .nc4 files with 10.5km x 10.5km spatial resolution. The last version of this product was ACOS/GOSAT version 9 (Taylor et al., 2020), and covered the time period 2009/04/20-2020/06/30. The v11.0 product uses the latest version of the ACOS algorithm and covers 2009/04/18-2025/03/26, containing XCO2 (units of parts per million [ppm]) for nearly clear-sky soundings with sufficient signal, over both land and ocean. This product uses TANSO-FTS instrument's spectral radiances as produced by JAXA, version v300300 and v300301. The GOSAT team at JAXA produces GOSAT TANSO-FTS Level 1B (L1B) data products for internal use and for distribution to collaborative partners, such as ESA and NASA. These calibrated products are augmented by the OCO Project with additional information such as local surface elevation. Thus produced Level 1B products (with calibrated radiances and geolocation) are the input to the ACOS Level 2 production process. The ACOS version 11.0 product was produced at Colorado State University.

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Temporal Extent:

Start: 2009-04-18T00:00:00.000Z

Spatial Extent:

Minimum Bounding Rectangle: -90 -180 90 180

GES_DISC Short Name: ACOS_L2_Lite_FP Version ID: 11.0 Unique ID: C4106152863-GES_DISC

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Description:

Gridded carbon dioxide mole fraction (XCO2) and other select variables created by applying local kriging (also known as optimal interpolation) to daily aggregates of Orbiting Carbon Observatory (OCO-2) and Greenhouse Gases Observing Satellite (GOSAT) bias corrected data. This is the latest version of this collection. The DOIs assigned to previous versions, which are no longer available, now direct to this page.

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Temporal Extent:

Start: 2014-09-06T02:13:13.270Z

End: 2021-05-20T23:37:00.000Z

Spatial Extent:

Minimum Bounding Rectangle: -90 -180 90 180

GES_DISC Short Name: MultiInstrumentFusedXCO2 Version ID: 4 Unique ID: C3278456754-GES_DISC

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Description:

This data set contains estimates of methane emission in North America based on an inversion of the GEOS-Chem chemical transport model constrained by Greenhouse Gases Observing SATellite (GOSAT) observations. The NASA Carbon Monitoring System (CMS) is designed to make significant contributions in characterizing, quantifying, understanding, and predicting the evolution of global carbon sources and sinks through improved monitoring of carbon stocks and fluxes. The System will use the full range of NASA satellite observations and modeling/analysis capabilities to establish the accuracy, quantitative uncertainties, and utility of products for supporting national and international policy, regulatory, and management activities. CMS will maintain a global emphasis while providing finer scale regional information, utilizing space-based and surface-based data and will rapidly initiate generation and distribution of products both for user evaluation and to inform near-term policy development and planning.

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Temporal Extent:

Start: 2010-01-01T00:00:00.000Z

End: 2015-12-31T23:59:00.000Z

Spatial Extent:

Minimum Bounding Rectangle: 10 -140 70 -40

GES_DISC Short Name: CMS_HR_MNA_CH4_FLUX Version ID: 1 Unique ID: C2079343756-GES_DISC

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Description:

The CH4_GOS_OCFP dataset is comprised of level 2, column-averaged dry-air mole fractions (mixing ratios) of methane (XCH4). It has been produced using data acquired from the Thermal and Near Infrared Sensor for Carbon Observations (TANSO-FTS) NIR and SWIR spectra, onboard the Japanese Greenhouse gases Observing Satellite (GOSAT), using the University of Leicester Full-Physics Retrieval Algorithm. It has been generated as part of the European Space Agency (ESA) Greenhouse Gases Climate Change Initiative (GHG_cci) project. This version is version 2.1 and forms part of the Climate Research Data Package 4.The University of Leicester Full-Physics Retrieval Algorithm is based on the original Orbiting Carbon Observatory (OCO) Full Physics Retrieval Algorithm and has been modified for use on GOSAT spectra. A second GOSAT CH4 product, generated using the SRFP algorithm, is also available.The XCH4 product is stored in NetCDF format with all GOSAT soundings on a single day stored in one file. For further information, including details of the OCFP algorithm and the TANSO-FTS instrument, please see the associated product user guide (PUG).

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Temporal Extent:

Start: 2009-04-18T00:00:00.000Z

End: 2015-12-31T23:59:59.000Z

Spatial Extent:

Minimum Bounding Rectangle: -90 -180 90 180

FEDEO Short Name: 56f81895cb094bd8a1638aa12d6c7499 Version ID: NA Unique ID: C2548142501-FEDEO

Description:

The CH4_GOS_SRPR dataset is comprised of Level 2, column-averaged dry-air mole fractions (mixing ratios) of methane (XCH4). It has been produced using data acquired from the Thermal and Near Infrared Sensor for Carbon Observations (TANSO-FTS) NIR and SWIR spectra, onboard the Japanese Greenhouse gases Observing Satellite (GOSAT), using the RemoTeC SRPR Proxy Retrieval algorithm. It has been generated as part of the European Space Agency (ESA) Greenhouse Gases Climate Change Initiative (GHG_cci) project. This version of the data is version 2.3.8, and forms part of the Climate Research Data Package 4. This Proxy Retrieval product has been generated using the RemoTeC SRPR algorithm, which is being jointly developed at SRON and KIT. This has been designated as an 'alternative' GHG CCI algorithm, and a separate product has also been generated by applying the baseline GHG CCI proxy algorithm (the University of Leicester OCPR algorithm). It is advised that users who aren't sure whether to use the baseline or alternative product use the OCPR product generated with the baseline algorithm. For more information regarding the differences between the baseline and alternative algorithms please see the GHG-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. As well as containing the key product, the product file contains information relevant for the use of the data, such as the vertical layering and averaging kernels. The parameters which are retrieved simultaneously with XCH4 are also included (e.g. surface albedo), in addition to retrieval diagnostics like quality of the fit and retrieval errors. For further details on the product, including the RemoTeC algorithm and the TANSO-FTS instrument, please see the associated product user guide (PUG) or the Algorithm Theoretical Basis Documents.

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Temporal Extent:

Start: 2009-04-01T00:00:00.000Z

End: 2015-12-30T23:59:59.000Z

Spatial Extent:

Minimum Bounding Rectangle: -90 -180 90 180

FEDEO Short Name: 96d5b75ea29946c5aab8214ddbab252b Version ID: NA Unique ID: C2548142712-FEDEO