The SMAP Level 4 Carbon Product for Monitoring Ecosystem Land-Atmosphere CO2 Exchange

Lucas A. Jones, John S. Kimball, Rolf H. Reichle, Nima Madani, Joe Glassy, Joe V. Ardizzone, Andreas Colliander, James Cleverly, Ankur R. Desai, Derek Eamus, Eugenie S. Euskirchen, Lindsay Hutley, Craig Macfarlane, Russell L. Scott

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    The National Aeronautics and Space Administration's Soil Moisture Active Passive (SMAP) mission Level 4 Carbon (L4C) product provides model estimates of the Net Ecosystem CO2 exchange (NEE) incorporating SMAP soil moisture information. The L4C product includes NEE, computed as total ecosystem respiration less gross photosynthesis, at a daily time step posted to a 9-km global grid by plant functional type. Component carbon fluxes, surface soil organic carbon stocks, underlying environmental constraints, and detailed uncertainty metrics are also included. The L4C model is driven by the SMAP Level 4 Soil Moisture data assimilation product, with additional inputs from the Goddard Earth Observing System, Version 5 weather analysis, and Moderate Resolution Imaging Spectroradiometer satellite vegetation data. The L4C data record extends from March 31, 2015 to present with ongoing production and 8-12 day latency. Comparisons against concurrent global CO2 eddy flux tower measurements, satellite solar-induced canopy florescence, and other independent observation benchmarks show favorable L4C performance and accuracy, capturing the dynamic biosphere response to recent weather anomalies. Model experiments and L4C spatiotemporal variability were analyzed to understand the independent value of soil moisture and SMAP observations relative to other sources of input information. This analysis highlights the potential for microwave observations to inform models where soil moisture strongly controls land CO2 flux variability; however, skill improvement relative to flux towers is not yet discernable within the relatively short validation period. These results indicate that SMAP provides a unique and promising capability for monitoring the linked global terrestrial water and carbon cycles.

    Original languageEnglish
    Pages (from-to)6517-6532
    Number of pages16
    JournalIEEE Transactions on Geoscience and Remote Sensing
    Volume55
    Issue number11
    DOIs
    Publication statusPublished - Nov 2017

    Fingerprint

    Soil moisture
    Ecosystems
    soil moisture
    Carbon
    atmosphere
    Monitoring
    ecosystem
    carbon
    monitoring
    Fluxes
    Towers
    Moisture control
    Satellites
    weather
    product
    land
    environmental constraint
    Photosynthesis
    EOS
    carbon flux

    Cite this

    Jones, L. A., Kimball, J. S., Reichle, R. H., Madani, N., Glassy, J., Ardizzone, J. V., ... Scott, R. L. (2017). The SMAP Level 4 Carbon Product for Monitoring Ecosystem Land-Atmosphere CO2 Exchange. IEEE Transactions on Geoscience and Remote Sensing, 55(11), 6517-6532. https://doi.org/10.1109/TGRS.2017.2729343
    Jones, Lucas A. ; Kimball, John S. ; Reichle, Rolf H. ; Madani, Nima ; Glassy, Joe ; Ardizzone, Joe V. ; Colliander, Andreas ; Cleverly, James ; Desai, Ankur R. ; Eamus, Derek ; Euskirchen, Eugenie S. ; Hutley, Lindsay ; Macfarlane, Craig ; Scott, Russell L. / The SMAP Level 4 Carbon Product for Monitoring Ecosystem Land-Atmosphere CO2 Exchange. In: IEEE Transactions on Geoscience and Remote Sensing. 2017 ; Vol. 55, No. 11. pp. 6517-6532.
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    abstract = "The National Aeronautics and Space Administration's Soil Moisture Active Passive (SMAP) mission Level 4 Carbon (L4C) product provides model estimates of the Net Ecosystem CO2 exchange (NEE) incorporating SMAP soil moisture information. The L4C product includes NEE, computed as total ecosystem respiration less gross photosynthesis, at a daily time step posted to a 9-km global grid by plant functional type. Component carbon fluxes, surface soil organic carbon stocks, underlying environmental constraints, and detailed uncertainty metrics are also included. The L4C model is driven by the SMAP Level 4 Soil Moisture data assimilation product, with additional inputs from the Goddard Earth Observing System, Version 5 weather analysis, and Moderate Resolution Imaging Spectroradiometer satellite vegetation data. The L4C data record extends from March 31, 2015 to present with ongoing production and 8-12 day latency. Comparisons against concurrent global CO2 eddy flux tower measurements, satellite solar-induced canopy florescence, and other independent observation benchmarks show favorable L4C performance and accuracy, capturing the dynamic biosphere response to recent weather anomalies. Model experiments and L4C spatiotemporal variability were analyzed to understand the independent value of soil moisture and SMAP observations relative to other sources of input information. This analysis highlights the potential for microwave observations to inform models where soil moisture strongly controls land CO2 flux variability; however, skill improvement relative to flux towers is not yet discernable within the relatively short validation period. These results indicate that SMAP provides a unique and promising capability for monitoring the linked global terrestrial water and carbon cycles.",
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    author = "Jones, {Lucas A.} and Kimball, {John S.} and Reichle, {Rolf H.} and Nima Madani and Joe Glassy and Ardizzone, {Joe V.} and Andreas Colliander and James Cleverly and Desai, {Ankur R.} and Derek Eamus and Euskirchen, {Eugenie S.} and Lindsay Hutley and Craig Macfarlane and Scott, {Russell L.}",
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    Jones, LA, Kimball, JS, Reichle, RH, Madani, N, Glassy, J, Ardizzone, JV, Colliander, A, Cleverly, J, Desai, AR, Eamus, D, Euskirchen, ES, Hutley, L, Macfarlane, C & Scott, RL 2017, 'The SMAP Level 4 Carbon Product for Monitoring Ecosystem Land-Atmosphere CO2 Exchange', IEEE Transactions on Geoscience and Remote Sensing, vol. 55, no. 11, pp. 6517-6532. https://doi.org/10.1109/TGRS.2017.2729343

    The SMAP Level 4 Carbon Product for Monitoring Ecosystem Land-Atmosphere CO2 Exchange. / Jones, Lucas A.; Kimball, John S.; Reichle, Rolf H.; Madani, Nima; Glassy, Joe; Ardizzone, Joe V.; Colliander, Andreas; Cleverly, James; Desai, Ankur R.; Eamus, Derek; Euskirchen, Eugenie S.; Hutley, Lindsay; Macfarlane, Craig; Scott, Russell L.

    In: IEEE Transactions on Geoscience and Remote Sensing, Vol. 55, No. 11, 11.2017, p. 6517-6532.

    Research output: Contribution to journalArticleResearchpeer-review

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    AU - Kimball, John S.

    AU - Reichle, Rolf H.

    AU - Madani, Nima

    AU - Glassy, Joe

    AU - Ardizzone, Joe V.

    AU - Colliander, Andreas

    AU - Cleverly, James

    AU - Desai, Ankur R.

    AU - Eamus, Derek

    AU - Euskirchen, Eugenie S.

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    KW - Ecosystems

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    KW - environmental monitoring

    KW - microwave remote sensing

    KW - Soil moisture

    KW - soil moisture

    KW - Soil Moisture Active Passive (SMAP) Mission

    KW - vegetation

    KW - Vegetation mapping

    KW - water cycle.

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