2024-03-28T17:29:30Zhttp://nsidc.org/api/dataset/metadata/oaioai:nsidc.org/SPL4CMDL.0032024-01-25T13:16:56Znasa_nsidc_daacecsretired
SPL4CMDL.003SMAP L4 Global Daily 9 km Carbon Net Ecosystem ExchangeKimball, J. S., L. A. Jones, J. Glassy, and R. Reichle.SMAP L4 Global Daily 9 km Carbon Net Ecosystem Exchange2017-07-13Boulder, Colorado USANASA NSIDC DAAC: NASA National Snow and Ice Data Center Distributed Active Archive Center3false10.5067/O4HAQJEWWUU8https://doi.org/10.5067/O4HAQJEWWUU8SPL4CMDLTechnical ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468CIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAEARTH SCIENCELand SurfaceSoilsSoil Productivity Gross Primary Productivity (GPP)EARTH SCIENCELand SurfaceSoilsSoil Respiration HETEROTROPHIC RESPIRATION (Rh)EARTH SCIENCELand SurfaceSoilsCarbon NET ECOSYSTEM CO2 EXCHANGE (NEE)EARTH SCIENCELand SurfaceSoilsCarbon SOIL ORGANIC CARBON (SOC)Geoscientific InformationClimatology/Meteorology/AtmosphereEASE-Grid Other-projectMODELSRADIOMETERSMAP-projectSoil MoistureSoil Moisture Active PassiveMODISModerate-Resolution Imaging SpectroradiometerSMAP L-BAND RADIOMETERSMAP L-BAND RADIOMETERVIIRSVisible-Infrared Imager-Radiometer SuiteAQUAEarth Observing System, AQUASMAP ObservatorySoil Moisture Active and Passive ObservatorySUOMI-NPPSuomi National Polar-orbiting PartnershipTERRAEarth Observing System, TERRA (AM-1)2015-03-312018-06-04complete-85.04485.044-180180Geographic RegionGlobal Land9 km9 km1 daySMAPSoil Moisture Active PassiveSMAP products provide multiple means to assess quality. Each product contains bit flags, uncertainty measures, and file-level metadata that provide quality information. For information regarding the specific bit flags, uncertainty measures, and file-level metadata contained in this product, refer to the Data Fields and Metadata Fields documents.
Each HDF5 file contains metadata with Quality Assessment (QA) metadata flags that are set by the GMAO prior to delivery to National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC). A separate metadata file with an .xml file extension is also delivered to NSIDC DAAC with the HDF5 file; it contains the same information as the HDF5 file-level metadata.As a condition of using these data, you must cite the use of this data set using the recommended citation. For more information, see our Use and Copyright Web page at http://nsidc.org/about/use_copyright.html.EnglishNASA/GSFC/SED/ESD/GMAONASA NSIDC DAACNASA National Snow and Ice Data Center Distributed Active Archive Centerhttps://nsidc.org/daacData Center ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-6199National Snow and Ice Data CenterCIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAHTTPS133 MBHDF5Baldocchi, D. 2008. Breathing of the Terrestrial Biosphere: Lessons Learned from a Global Network of Carbon Dioxide Flux Measurement Systems. Austr. J. Bot. 56: 1-26.
Brodzik, M. J., B. Billingsley, T. Haran, B. Raup, and M. H. Savoie. 2012. EASE-Grid 2.0: Incremental but Significant Improvements for Earth-Gridded Data Sets. ISPRS Int. J. Geo-Inf. 1(1):32-45. http://dx.doi.org/10.3390/ijgi1010032.
Brodzik, M. J., B. Billingsley, T. Haran, B. Raup, and M. H. Savoie. 2014. Correction: Brodzik, M. J. et al. EASE-Grid 2.0: Incremental but Significant Improvements for Earth-Gridded Data Sets. ISPRS Int. J. Geo-Inf 2012. 1(1):32-45 ISPRS Int. J. Geo-Inf. 3(3):1154-1156. http://dx.doi.org/10.3390/ijgi3031154.
Chen, B., N. C. Coops, D. Fu et al. 2012. Characterizing Spatial Representativeness of Flux Tower Eddy-Covariance Measurements across the Canadian Carbon Prgram Network Using Remote Sensing and Footprint Analysis. Rem. Sens. Environ. 124:742-755.
Dargaville, R. A. D. McGuire, and P. Rayner. 2002. Estimates of Large-Scale Fluxes in High Latitudes from Terrestrial Biosphere Models and an Inversion of Atmospheric CO2 Measurements. Climatic Change 55:273–285.
Denman, K. L., G. Brasseur, A. Chidthaisong, P. Ciais, P. M. Cox, R. E. Dickinson, D. Hauglustaine, C. Heinze, E. Holland, D. Jacob, U. Lohmann, S. Ramachandran, P. L. da Silva Dias, S. C. Wofsy, and X. Zhang. 2007. Couplings Between Changes in the Climate System and Biogeochemistry. In: Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change [Solomon, S., D. Qin, M. Manning, Z. Chen, M. Marquis, K. B. Averyt, M. Tignor, and H. L. Miller (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA.
Entekhabi, D. et al. 2014. SMAP Handbook–Soil Moisture Active Passive: Mapping Soil Moisture and Freeze/Thaw from Space. Pasadena, CA USA: SMAP Project, JPL CL#14-2285, Jet Propulsion Laboratory.
Glassy, J., J. S. Kimball, L. Jones, R. H., Reichle, R. A. Lucchesi, J. V. Ardizzone, G.-K. Kim, and B. H. Weiss. 2016. Soil Moisture Active Passive (SMAP) Mission Level 4 Carbon (L4_C) Product Specification Document. GMAO Office Note No. 11, Version 2.0. NASA Goddard Space Flight Center, Greenbelt, MD, USA. (SMAP_L4C_PSD_v2_0_20160421.pdf, 1.3 MB)
Houghton, R. A. 2003. Why are Estimates of the Terrestrial Carbon Balance so Different? Global Change Biol. 9:500-9.
Ise, T., and P. R. Moorcroft. 2006. The Global-Scale Temperature and Moisture Dependencies of Soil Organic Carbon Decomposition: An Analysis Using a Mechanistic Decomposition Model. Biogeochemistry 80: 217–231.
Jackson, T. J., J. S. Kimball, R. Reichle, W. Crow, A. Colliander, and E. Njoku. 2011. SMAP Science Calibration and Validation Plan. SMAP Science Document, No. 014, Version 1.2 (Preliminary Release), JPL D-52544:1-93.
Kim, Y., J. Kimball, K. Zhang, K. McDonald. 2012. Satellite Detection of Increasing Northern Hemisphere Non-Frozen Seasons from 1979 to 2008: Implications for Regional Vegetation Growth. Remote Sens. Environ., 121:472-487.
Kimball, J. S., Jones L. A., Zhang K., Heinsch F. A., McDonald K. C., and Oechel W. C. 2009. A Satellite Approach to Estimate Land-Atmosphere CO2 Exchange for Boreal and Arctic Biomes using MODIS and AMSR-E. IEEE Geosci. Remote Sens. 47:569-87.
Kimball, J. S., L. A. Jones, J. P. Glassy, and R. Reichle. 2014. SMAP Algorithm Theoretical Basis Document, Release A: L4 Carbon Product. SMAP Project, JPL D-66484, Jet Propulsion Laboratory, Pasadena CA. 76 pp. (271_L4_C_RevA_web.pdf, 2.7 MB)
Kimball, J. S., L. A. Jones, J. Glassy, E. N. Stavros, N. Madani, R. H. Reichle, T. Jackson, and A. Colliander. 2015. Soil Moisture Active Passive (SMAP) Project Calibration and Validation for the L4_C Beta-Release Data Product. NASA/TM–2015-104606, 42:1-37. (Kimball806.pdf, 13.7 MB)
Kimball, J. S., L. A. Jones, J. Glassy, E. N. Stavros, N. Madani, R. H. Reichle, T. Jackson, and A. Colliander. 2016. Soil Moisture Active Passive (SMAP) Mission Assessment Report for the Version 2 Validated Release L4_C Data Product. GMAO Office Note No. 13 (Version 1.0):1-37. NASA Goddard Space Flight Center, Greenbelt, MD, USA. (SMAP-Validation_Report_L4_C_20160421.pdf, 2.25 MB)
National Research Council (NRC). 2007. Earth Science and Applications from Space: National Imperatives for the Next Decade and Beyond (Executive Summary). National Academy of Sciences, National Academies Press, Washington DC. 1-35. http://www.nap.edu/catalog/11820.html.
Parton, W. J., D. S. Schimel, C. V. Cole, and D. S. Ojima. 1987. Analysis of Factors Controlling Soil Organic Matter Levels in Great Plains Grasslands. Soil Sci. Soc. Am. J. 51: 1173–1179.
Piao, S., P. Ciais, P. Friedlingstein, P. Peylin, M. Reichstein, S. Luyssaert, H. Margolis, J. Fang, A. Barr, A. Chen, A. Grelle, D. Y. Hollinger, T. Laurila, A. Lindroth, A. D. Richardson, and T. Vesala, 2007. Net Carbon Dioxide Losses of Northern Ecosystems in Response to Autumn Warming. Nature 451:49-52, http://dx.doi.org/doi:10.1038/nature06444.
Potter, C. S., J. T. Randerson, C. B. Field, P. A. Matson, P. M. Vitousek, H. A. Mooney, and S. A. Klooster. 1993. Terrestrial Ecosystem Production: A Process Model Based on Global satellite and Surface Data. Global Biogeochemical Cycles 7(4):811-841.
Richardson, A. D., D. Y. Hollinger. 2005. Statistical Modeling of Ecosystem Respiration Using Eddy Covariance Data: Maximum Likelihood Parameter Estimation, and Monte Carlo Simulation of Model and Parameter Uncertainty Applied to Three Simple Models. Ag. For. Meteor. 131:191-208.
Richardson, A. D, M. D. Mahecha, E. Falge, et al., 2008. Statistical Properties of Random CO2 Flux Measurement Uncertainty Inferred from Model Residuals. Ag. For. Meteor. 148:38-50.
Running, S. W., D. D. Baldocchi, D. P. Turner, S. T. Gower, P. S. Bakwin, and K. A. Hibbard. 1999. A Global Terrestrial Monitoring Network Integrating Tower Fluxes, Flask Sampling, Ecosystem Modeling and EOS Satellite Data. Remote Sensing of Environment 70:108-127.
Yi, Y., J. S. Kimball, L. A. Jones, R. H. Reichle, R. Nemani, and H. A. Margolis. 2013. Recent Climate and Fire Disturbance Impacts on Boreal and Arctic Ecosystem Productivity Estimated Using a Ssatellite-Based Terrestrial Carbon Flux Model. J. Geophys. Res. Biogeosci. 118:1-17.
Zhao, M., F. A. Heinsch, R. R. Nemani, and S. W. Running. 2005. Improvements of the MODIS Terrestrial Gross and Net Primary Production Global Data Set. Remote Sensing of Environment 95(2):164-175.
Zhao, M., and S. W. Running. 2010. Drought-Induced Reduction in Global Terrestrial Net Primary Production from 2000 through 2009. Science 329(5994):940-943.The Level-4 (L4) carbon product (SPL4CMDL) provides global gridded daily estimates of net ecosystem carbon (CO2) exchange derived using a satellite data based terrestrial carbon flux model informed by the following: Soil Moisture Active Passive (SMAP) L-band microwave observations, land cover and vegetation inputs from the Moderate Resolution Imaging Spectroradiometer (MODIS), Visible Infrared Imaging Radiometer Suite (VIIRS), and the Goddard Earth Observing System Model, Version 5 (GEOS-5) land model assimilation system. Parameters are computed using an Earth-fixed, global, cylindrical 9 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0) projection.VIEW RELATED INFORMATIONhttps://doi.org/10.5067/O4HAQJEWWUU8DocumentationGET DATAhttps://nsidc.org/data/data-access-tool/SPL4CMDL/versions/3/Data Access ToolVIEW RELATED INFORMATIONhttp://nsidc.org/data/smap/index.htmlSMAP Data at NASA NSIDC DAACVIEW RELATED INFORMATIONhttp://nsidc.org/data/smap/validation/val-data.htmlSMAP Validation Data at NASA NSIDC DAACPROJECT HOME PAGEhttp://smap.jpl.nasa.gov/SMAP Web Site at the Jet Propulsion LaboratoryVIEW RELATED INFORMATIONhttps://www.asf.alaska.edu/smap/SMAP Data at NASA ASF DAACVIEW RELATED INFORMATIONhttps://nsidc.org/data/docs/daac/smap/sp_l4_cmdl/pdfs/271_L4_C_RevA_web.pdfAlgorithm Theoretical Basis Document (ATBD)CEOS IDN DIFVERSION 9.92017-07-132024-01-25NSIDCVersion Summary<p>Changes to this version include:</p>
<ul><li>Uses dynamic 8-day fPAR inputs obtained from the latest (Collection 6) MODIS fPAR record at 500 m resolution. The preprocessor was updated to handle the finer resolution MODIS Collection 6 inputs, which are interpolated to 1 km resolution prior to model processing. The prior (Version 2) processor used MODIS Collection 5 fPAR inputs, which were derived at 1 km resolution.</li>
<li>Updated the ancillary MODIS fPAR 8-day climatology used for fPAR gap-filling as an L4C model preprocessing step to reflect new MODIS Collection 6 fPAR inputs. The fPAR climatology is derived from a longer 14-year (2000-2014) MODIS record relative to the original 12-year (2000-2012) Collection 5 fPAR record used in Version 2 processing. </li>
<li>For each grid cell, a sine-curve-based seasonal fPAR climatology curve is now used to identify and screen anomalous 8-day fPAR variations in the preprocessor. This change reduces impacts of anomalous fPAR temporal variations that may not be captured by the MODIS fPAR product quality control (QC) flags, particularly during seasonal transitions at northern latitudes. </li>
<li> Updated and recalibrated the ancillary Biome Properties Look-Up Table (BPLUT) and re-initialized the model initial global soil organic carbon (SOC) pools to reflect new MODIS Collection 6 fPAR inputs. The BPLUT calibration was conducted using global historical FLUXNET in situ tower eddy covariance CO2 flux measurement records for representative global land cover types using a similar step-wise calibration procedure employed for the Version 2 product.</li>
<li>A minor bug fix to the post-processor was made to ensure that all grid cell no-data fill values are identified with a consistent -9999 notation; the prior Version 2 product erroneously assigned some no-data values as -999900.</li></ul>NSIDCMinor VersionVv4040Changed with Version 3 update. 2015-03-312018-06-041NSIDCLevel of ServiceNo Data AccessNSIDCFull Dataset CitationKimball, J. S., L. A. Jones, J. Glassy, and R. Reichle. 2017. <i>SMAP L4 Global Daily 9 km Carbon Net Ecosystem Exchange.</i> Version 3. [indicate subset used]. Boulder, Colorado USA: NASA National Snow and Ice Data Center Distributed Active Archive Center. <a href="https://doi.org/10.5067/O4HAQJEWWUU8">https://doi.org/10.5067/O4HAQJEWWUU8</a>. [Date Accessed].NSIDCRetiredtrueNSIDCRelated Servicesapplication/vnd.nasa.cmr.umm+jsonfalsejroebuckmmt_service_14455S2011758375-NSIDC_ECSNSIDC_ECS6service2023-05-11T22:55:27.797Zhttps://n5eil02u.ecs.nsidc.org/egi/requestNSIDC_ECS_EGI_API_SMAP_L3L4ESI23.1Customized Programmatic Data Access ServiceProgrammatically request selected data products through our API. This tool is valuable for selecting just the parameters you need from big data sets. Apply spatial and temporal filters, subsetting, reformatting, and reprojection.https://nsidc.org/support/how/how-do-i-programmatically-request-data-servicesVIEW RELATED INFORMATIONProgrammatic Data Access GuidePublicationURLUSER SERVICESNSIDC DAAC User ServicesEmailnsidc@nsidc.orgESRIGeoJSONKMLfalsetrueHDF5ASCIIGEOTIFFHDF-EOS5HDF5KMLNETCDF-4WGS 84 / NSIDC EASE-Grid NorthEPSG:6931WGS 84 / NSIDC EASE-Grid GlobalEPSG:6933WGS 84 / NSIDC EASE-Grid SouthEPSG:6932GeographicEPSG:4326Universal Transverse MercatorPolar Stereographic2023-04-19T00:00:00.000ZDATA INTEROPERABILITYDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESDATA REFORMATTINGDATA ACCESS/RETRIEVALDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESDATA CUSTOMIZATIONDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESREPROJECTIONSUBSETTING/SUPERSETTINGDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESSPATIAL SUBSETTINGSUBSETTING/SUPERSETTINGDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESVARIABLE SUBSETTINGThis is the most current release of this service.SERVICE PROVIDERNASA National Snow and Ice Data Center Distributed Active Archive CenterNASA NSIDC DAACNASA Distributed Active Archive Center (DAAC) at NSIDChttps://nsidc.org/daacNSIDC DAAC home page.DEVELOPERORIGINATORPUBLISHERMaintenance and Development, Earth Observing System Data and Information System, Earth Observing System,Goddard Space Flight Center, NASANASA/GSFC/EOS/EOSDIS/EMDEOSDIS Core System Maintenance and Developmenthttps://earthdata.nasa.gov/eosdisEOSDIS home page.https://cdn.earthdata.nasa.gov/umm/service/v1.4UMM-S1.4https://nsidc.org/support/how/how-do-i-programmatically-request-data-servicesapplication/vnd.nasa.cmr.umm+jsonfalsetdwilliaNSIDC_ECS_PROD_ECHO_ORDERS_serviceS1568899363-NSIDC_ECSNSIDC_ECS8service2023-05-31T15:37:55.746Zhttps://n5eil02u.ecs.nsidc.org/ops/cobi/ECHO ORDERS Service for NSIDC_ECS EOSDIS Service ImplementationNSIDC_ECS_ECHO_ORDERSECHO ORDERS1NSIDC_ECS EOSDIS ECHO ORDERS Service ImplementationNSIDC_ECS EOSDIS ECHO ORDERS Service ImplementationAvailableNONEDATA ACCESS/RETRIEVALDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESDATA DELIVERYDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESNONEPUBLISHERNASA National Snow and Ice Data Center Distributed Active Archive CenterNASA/NSIDChttps://cdn.earthdata.nasa.gov/umm/service/v1.4UMM-S1.4https://n5eil02u.ecs.nsidc.org/ops/cobi/application/vnd.nasa.cmr.umm+jsonfalseamy.steikermmt_service_12641S1977894169-NSIDC_ECSNSIDC_ECS9service2022-07-01T18:43:22.565Zhttps://n5eil01u.ecs.nsidc.org/NSIDC_ECS_DAAC_HTTPS_File_SystemNOT PROVIDED20.2HTTPS File SystemQuickly download a few files using a web browser, or access data through a command-line utility such as WGET.https://nsidc.org/support/how/how-do-i-programmatically-request-data-servicesVIEW RELATED INFORMATIONProgrammatic Data Access GuidePublicationURLUSER SERVICESNSIDC DAAC User ServicesEmailnsidc@nsidc.org2020-10-21T00:00:00.000ZDATA ACCESS/RETRIEVALDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESThis is the most current release of this service.ORIGINATORPUBLISHERSERVICE PROVIDERNASA National Snow and Ice Data Center Distributed Active Archive CenterNASA NSIDC DAACNASA Distributed Active Archive Center (DAAC) at NSIDChttps://nsidc.org/daacNSIDC DAAC home pageDEVELOPERMaintenance and Development, Earth Observing System Data and Information System, Earth Observing System,Goddard Space Flight Center, NASANASA/GSFC/EOS/EOSDIS/EMDhttps://cdn.earthdata.nasa.gov/umm/service/v1.4UMM-S1.4https://nsidc.org/support/how/how-do-i-programmatically-request-data-servicesNSIDCRelated Toolsapplication/vnd.nasa.cmr.umm+jsonfalseamy.steikermmt_tool_12821TL1977971361-NSIDC_ECSNSIDC_ECS6tool2022-07-01T18:41:00.427ZGOTO WEB TOOLhttps://search.earthdata.nasa.gov/searchDistributionURLNSIDC_ECS_NASA_Earthdata_SearchWeb User Interface1NASA Earthdata SearchSearch and order data from all NASA DAACs using spatial and temporal filters in a map interface. Reformatting, reprojecting, and subsetting options are available for some data sets.https://nsidc.org/support/how/search-order-and-customize-nsidc-daac-data-nasa-earthdata-searchVIEW RELATED INFORMATIONHow to search, order, and customize data with NASA Earthdata SearchPublicationURLDATA VISUALIZATIONDATA ANALYSIS AND VISUALIZATIONEARTH SCIENCE SERVICESDATA SEARCHDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESDATA ACCESS/RETRIEVALDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESSERVICE PROVIDERNSIDC DAAC User ServicesEmailnsidc@nsidc.orgSERVICE PROVIDEREarthdata Service DeskEmailsupport@earthdata.nasa.govAUTHORDEVELOPERORIGINATORPUBLISHERMaintenance and Development, Earth Observing System Data and Information System, Earth Observing System,Goddard Space Flight Center, NASAhttp://newsroom.gsfc.nasa.gov/NASA/GSFC/EOS/EOSDIS/EMDChromeFirefoxSafariThis is the most current release of this tool.https://cdn.earthdata.nasa.gov/umm/tool/v1.0UMM-T1.0https://search.earthdata.nasa.gov/search