This data set contains standardized gridded observation data, terrestrial biospheric model output, and inverse model simulations that were compiled but not used in the North American Carbon Program (NACP) Regional Synthesis activities, thus the supplemental designation. The data set provides six (6) observation data packages (9 variables - MODIS LAI, MODIS FPAR, MODIS NDVI, MODIS EVI, FIA forest biomass, forest area, GPP Anomaly, NEE Anomaly, Reco Anomaly; 8 data files), output results from three terrestrial biosphere models (TBM) (14 variables; 214 files), and simulations from one inverse model (IM) (one variable; 1 file).
To produce this data set, the NACP Modeling and Synthesis Thematic Data Center (MAST-DC) original data files were resampled to 1-degree spatial resolution for North American region (except for FIA Forest Biomass which was resampled to 0.5-degree resolution), interpolated into monthly or yearly temporal resolution, and reformatted into Climate and Forecast (CF) convention compatible netCDF format.
This data set is related to the original data submissions and two additional regional processed data sets (i.e., gridded 1-deg observation data and biosphere and inverse model outputs; and national greenhouse gas (GHG) inventories and model outputs aggregated by GHG inventory zones (see Related Data Products below). Detailed descriptions of observation data, TBMs, and IMs can be found in Regional-Description_of_Observations_and_Models.pdf.
MAST-DC was a component of the NACP (www.nacarbon.org) designed to support NACP by providing data products and data management services needed for modeling and synthesis activities. The overall objective of MAST-DC was to provide data management support to NACP investigators and agencies performing modeling and synthesis activities.
Get Data: http//:daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1158
Companion Documentation for this Data Set:
Model Characteristics Overview and References: NACP_Model_Characteristics.pdf
Related Data Products:
Cite this data set as follows:
Wei, Y., W.M. Post, R.B. Cook, P.E. Thornton, A.R. Jacobson, D.N. Huntzinger, F.M. Hoffman, G.G. Moisen, A.E. Schuh, C.R. Schwalm, and N. Viovy. 2013. NACP Regional: Supplemental Gridded Observations, Biosphere and Inverse Model Outputs. Data set. Available on-line [http://daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. http://dx.doi.org/10.3334/ORNLDAAC/1158
Project: North American Carbon Program (NACP)
The NACP (Denning et al., 2005; Wofsy and Harriss, 2002) is a multidisciplinary research program to obtain scientific understanding of North America's carbon sources and sinks and of changes in carbon stocks needed to meet societal concerns and to provide tools for decision makers. Successful execution of the NACP has required an unprecedented level of coordination among observational, experimental, and modeling efforts regarding terrestrial, oceanic, atmospheric, and human components. The program has relied upon a rich and diverse array of existing observational networks, monitoring sites, and experimental field studies in North America and its adjacent oceans. It is supported by a number of different federal agencies through a variety of intramural and extramural funding mechanisms and award instruments.
Recently, NACP and MAST-DC organized several synthesis activities to evaluate and inter-compare biosphere model outputs and observation data at local to continental scales for the time period of 2000 through 2005. The synthesis activities have included three component studies, each conducted on different spatial scales and producing numerous data products: (1) site-level analyses that examined process-based model estimates and observations at over 30 AmeriFlux and Fluxnet-Canada tower sites across North America; (2) a regional, mid-continent intensive study centered in the agricultural regions of the United States and focused on comparing inventory-based estimates of net carbon exchange with those from atmospheric inversions; and (3) a regional and continental synthesis evaluating model estimates against each other and available inventory-based estimates across North America. A number of other NACP syntheses were conducted, including ones focusing on non-CO2 greenhouse gases, the impact of disturbance on carbon exchange, and coastal carbon dynamics. The Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC) is the archive for the NACP synthesis data products.
This data set contains part of the third NACP synthesis product described above: regional analyses. It provides the supplemental gridded observation measurements and TBM and IM output data that were processed by MAST-DC but not used in the NACP Regional Interim Synthesis activities. The data set includes six (6) OM data granules (MODIS LAI, MODIS FPAR, MODIS NDVI, MODIS EVI, FIA Forest Biomass/Area, and Flux Anomaly), three (3) TBM data granules, and one IM data granule (Table 1). To produce this data set, the originally-submitted data were resampled to 1-degree spatial resolution for North American region (except for FIA Forest Biomass which was resampled to 0.5-degree resolution), interpolated into monthly or yearly temporal resolution, and reformatted into Climate and Forecast (CF) convention compatible netCDF format (Table 2).
This data set is related to two other processed regional data sets (i.e., gridded 1-degree observation data and biosphere and inverse model outputs used in the NACP Regional Synthesis activities; and national greenhouse gas (GHG) inventories and model outputs aggregated by GHG inventory zones) and the originally-submitted observation data and model outputs (see Related Data Products above). Detailed descriptions of observation data and models can be found in a separate document: Regional-Description_of_Observations_and_Models.pdf.
Table 1. Contributors
| Last Name | First Name | Organization | Role | |
|---|---|---|---|---|
| Wei | Yaxing | ORNL | weiy@ornl.gov | MAST-DC |
| Post | Wilfred M. | University of Tennessee | wmp@ornl.gov | MAST-DC |
| Cook | Robert B. | ORNL | cookrb@ornl.gov | MAST-DC |
| Thornton | Peter E. | ORNL | thorntonpe@ornl.gov | MAST-DC, CLM-CN |
| Jacobson | Andy | NOAA | andy.jacobson@noaa.gov | Synthesis Lead, CarbonTracker |
| Huntzinger | Deborah N. | Northern Arizona University | deborah.huntzinger@nau.edu | Synthesis Lead |
| Hoffman | Forrest | ORNL | forrest@climatemodeling.org | CLM-CASA |
| Moisen | Gretchen G. | USDA Forest Service | gmoisen@fs.fed.us | U.S. Forest Biomass |
| Schuh | Andrew | Colorado State University | aschuh@atmos.colostate.edul | CSU no.2 |
| Schwalm | Christopher | Northern Arizona University |
Christopher.Schwalm@nau.edu |
Flux Anomaly |
| Viovy | Nicolas | LSCE |
viovy@lsce.ipsl.fr |
ORCHIDEE |
Table 2. List of Observation Data and Models in the Supplemental Gridded Analysis
| OBSERVATION MEASUREMENTS | |
|---|---|
| Observation Data | Short Name |
| MODIS MOD15A2GFS Leaf Area Index (LAI) | LAI (MODIS for NACP, gap-filled, smoothed) |
| MODIS MOD15A2GFS Fraction of Photosynthetically Active Radiation (fPAR) | fPAR (MODIS for NACP, gap-filled, smoothed) |
| MODIS MOD09A1G_NDVI Normalized Difference Vegetation Index (NDVI) | NDVI (MODIS for NACP, gap-filled, smoothed) |
| MODIS MOD09A1G_EVI Enhanced Vegetation Index (EVI) | EVI (MODIS for NACP, gap-filled, smoothed) |
| Conterminous U.S. Forest Biomass | FIA Forest Biomass |
| Terrestrial Ecosystem Productivity and Respiration Anomalies | Flux Anomaly |
| TERRESTRIAL BIOSPHERE MODELS | |
| Prognostic Models | Short Name |
| Community Land Model with CASA (i01.54, i01.54_q15, i01.55) | CLM-CASA (i01.54, i01.54_q15, i01.55) |
| Community Land Model with Carbon&Nitrogen (i01.56) | CLM-CN (i01.56) |
| Organizing Carbon and Hydrology in Dynamic Ecosystems model (v2.1) | ORCHIDEE (v2.1) |
| INVERSE MODELS | |
| Inversion Models | Short Name |
| CSU no. 2 (MLEF-PCTM) model | CSU-no2 |
Table 3. Data Packages Summary
| Data Set | Sub Category | Variables | Files | File Formats |
|---|---|---|---|---|
| Supplemental Gridded Data | Observations (OM) | 9 (LAI, fPAR, NDVI, EVI, Forest Biomass, Forest Area, GPP Anomaly, NEE Anomaly, Reco Anomaly) | 8 | netCDF |
| Forward Terrestrial Biosphere Model (TBM) Outputs | 14 | 214 | netCDF | |
| Inverse Model (IM) Outputs | 1 (NEE) | 1 | netCDF |
This data set contains a total of 223 data files (8 OM data files, 214 TBM output data files, and 1 IM output data file). The data have been resampled by MAST-DC to a standard 1-degree spatial resolution for North American region (except for FIA Forest Biomass which was resampled to 0.5-degree resolution for the conterminous United States), interpolated into monthly or yearly temporal resolution, converted to a standard measurement unit (generally, kg C/m2/month or year), and reformatted into CF convention compatible netCDF format.
2.1. Spatial Coverage
Site: North America
Site boundaries: (All latitude and longitude given in decimal degrees)
| Site (Region) | Westernmost Longitude | Easternmost Longitude | Northernmost Latitude | Southernmost Latitude |
|---|---|---|---|---|
| North America | -170 | -50 | 84 | 10 |
2.2. Spatial Resolution
1 degree x 1 degree (except FIA Forest Biomass which is half degree resolution)
2.3. Spatial Coordinate Reference System
Sphere-based Geographic Lat/Lon
In CF-compatible netCDF files, it’s defined as:
char crs;
crs:grid_mapping_name = "latitude_longitude";
crs:semi_major_axis = 6370997.0f;
crs:inverse_flattening = 0.0f;
2.4. Temporal Coverage
Varies (range: 1990-2008). See Tables 4-6.
2.5. Temporal Resolution
Monthly or one time
2.6. Time Variable:
Units: “days since 1990-01-01 UTC”
Calendar: “noleap”
2.7. Data File Information
All of the data files are CF convention 1.0 compatible netCDF v3 formatted. Spatial resolution for all files is 1 degree x 1 degree (except FIA Forest Biomass which is half degree resolution). Spatial extent for all files is North America (except for FIA Forest Biomass which covers the conterminous United States only). Temporal resolution is monthly (except FIA Forest Biomass which is one time). Temporal extent varies as noted in Tables 3-5. Missing values are designated by the value -9999.0.
Table 4. Observation Measurements (OM) Data Files
| FILE NAMES | TEMPORAL EXTENT | UNITS | VARIABLE | |
|---|---|---|---|---|
| COMPRESSED FILE NAMES * | UNCOMPRESSED DATA FILE NAMES | |||
| OM_MODIS_LAI_Supplemental.zip | OM_MODIS_LAI_1d.nc | 2000-2005 | dimensionless ratio (m^2/m^2) | Leaf area index (MODIS LAI) |
| OM_MODIS_fPAR_Supplemental.zip | OM_MODIS_fPAR_1d.nc | 2000-2005 | Fraction of photosynthetically active radiation (MODIS fPAR) | |
| OM_MODIS_NDVI_Supplemental.zip | OM_MODIS_NDVI_1d.nc | 2000-2005 | index range: 0-1 | Normalized difference vegetation index (MODIS NDVI) |
| OM_MODIS_EVI_Supplemental.zip | OM_MODIS_EVI_1d.nc | 2000-2005 | Enhanced vegetation index (MODIS EVI) | |
| OM_FIA_Biomass_Supplemental.zip | OM_FIA_Biomass_hd.nc | ~2000 | kg C/m^2_of_forest | Forest biomass (half degree resolution) |
| m^2 | Forest area (half degree resolution) | |||
| OM_Flux-Anomaly_Supplemental.zip | FLUX_GPP_Anomaly_onedeg_v1.0.nc | 1990-2008 | kg C/m^2/mo | Gross primary production anomaly (GPP Anomaly) |
| FLUX_NEE_Anomaly_onedeg_v1.0.nc | Net ecosystem exchange anomaly (NEE Anomaly) | |||
| FLUX_Reco_Anomaly_onedeg_v1.0.nc | Ecosystem respiration anomaly (Reco Anomaly) | |||
Table 5. Terrestrial Biospheric Model (TBM) Output Data Files
| FILE NAMES | TEMPORAL EXTENT | UNITS | VARIABLE | |
|---|---|---|---|---|
| COMPRESSED FILE NAMES * | UNCOMPRESSED DATA FILE NAMES | |||
| TBM_CLM-CASA_Supplemental.zip | TBM_CLM-CASA_CWDC_1d_i01.54casa.nc | 1990-2004 | kg C/m^2 | Coarse woody debris carbon (CWDC) |
| TBM_CLM-CASA_CWDC_1d_i01.54casa_q15.nc | ||||
| TBM_CLM-CASA_CWDC_1d_i01.55casa.nc | ||||
| TBM_CLM-CASA_FROOTC_1d_i01.54casa.nc | 1990-2004 | kg C/m^2 | Fine root carbon (FROOTC) | |
| TBM_CLM-CASA_FROOTC_1d_i01.54casa_q15.nc | ||||
| TBM_CLM-CASA_FROOTC_1d_i01.55casa.nc | ||||
| TBM_CLM-CASA_GPP_1d_i01.54casa.nc | 1990-2004 | kg C/m^2/mo | GPP | |
| TBM_CLM-CASA_GPP_1d_i01.54casa_q15.nc | ||||
| TBM_CLM-CASA_GPP_1d_i01.55casa.nc | ||||
| TBM_CLM-CASA_HR_1d_i01.54casa.nc | 1990-2004 | kg C/m^2/mo | Heterotrophic respiration (HR) | |
| TBM_CLM-CASA_HR_1d_i01.54casa_q15.nc | ||||
| TBM_CLM-CASA_HR_1d_i01.55casa.nc | ||||
| TBM_CLM-CASA_landfrac_1d_i01.54casa.nc | 1990-2004 | Range: 0-1 | Land fraction | |
| TBM_CLM-CASA_landfrac_1d_i01.54casa_q15.nc | ||||
| TBM_CLM-CASA_landfrac_1d_i01.55casa.nc | ||||
| TBM_CLM-CASA_LEAFC_1d_i01.54casa.nc | 1990-2004 | kg C/m^2 | Leaf carbon (LEAFC) | |
| TBM_CLM-CASA_LEAFC_1d_i01.54casa_q15.nc | ||||
| TBM_CLM-CASA_LEAFC_1d_i01.55casa.nc | ||||
| TBM_CLM-CASA_LITTERC_1d_i01.54casa.nc | 1990-2004 | kg C/m^2 | Litter carbon | |
| TBM_CLM-CASA_LITTERC_1d_i01.54casa_q15.nc | ||||
| TBM_CLM-CASA_LITTERC_1d_i01.55casa.nc | ||||
| TBM_CLM-CASA_NEE_1d_i01.54casa.nc | 1990-2004 | kg C/m^2/mo | NEE | |
| TBM_CLM-CASA_NEE_1d_i01.54casa_q15.nc | ||||
| TBM_CLM-CASA_NEE_1d_i01.55casa.nc | ||||
| TBM_CLM-CASA_NEP_1d_i01.54casa.nc | 1990-2004 | kg C/m^2/mo | NEP | |
| TBM_CLM-CASA_NEP_1d_i01.54casa_q15.nc | ||||
| TBM_CLM-CASA_NEP_1d_i01.55casa.nc | ||||
| TBM_CLM-CASA_NPP_1d_i01.54casa.nc | 1990-2004 | kg C/m^2/mo | NPP | |
| TBM_CLM-CASA_NPP_1d_i01.54casa_q15.nc | ||||
| TBM_CLM-CASA_NPP_1d_i01.55casa.nc | ||||
| TBM_CLM-CASA_SOILC_1d_i01.54casa.nc | 1990-2004 | kg C/m^2 | Total soil organic matter carbon | |
| TBM_CLM-CASA_SOILC_1d_i01.54casa_q15.nc | ||||
| TBM_CLM-CASA_SOILC_1d_i01.55casa.nc | ||||
| TBM_CLM-CASA_TLAI_1d_i01.54casa.nc | 1990-2004 | dimensionless ratio (m^2/m^2) | Total projected leaf area index | |
| TBM_CLM-CASA_TLAI_1d_i01.54casa_q15.nc | ||||
| TBM_CLM-CASA_TLAI_1d_i01.55casa.nc | ||||
| TBM_CLM-CASA_VegC_1d_i01.54casa.nc | 1990-2004 | kg C/m^2 | Vegetation carbon (derived from LEAFC+WOODC+FROOTC) | |
| TBM_CLM-CASA_VegC_1d_i01.54casa_q15.nc | ||||
| TBM_CLM-CASA_VegC_1d_i01.55casa.nc | ||||
| TBM_CLM-CASA_WOODC_1d_i01.54casa.nc | 1990-2004 | kg C/m^2 | Wood carbon (WOODC) | |
| TBM_CLM-CASA_WOODC_1d_i01.54casa_q15.nc | ||||
| TBM_CLM-CASA_WOODC_1d_i01.55casa.nc | ||||
| TBM_CLM-CN_Supplemental.zip | TBM_CLM-CN_CWDC_1d_i01.56cn.nc | 1990-2004 | kg C/m^2 | Coarse woody debris carbon (CWDC) |
| TBM_CLM-CN_FROOTC_1d_i01.56cn.nc | Fine root carbon (FROOTC) | |||
| TBM_CLM-CN_GPP_1d_i01.56cn.nc | 1990-2004 | kg C/m^2/mo | GPP | |
| TBM_CLM-CN_HR_1d_i01.56cn.nc | Heterotrophic respiration (HR) | |||
| TBM_CLM-CN_landfrac_1d_i01.56cn.nc | 1990-2004 | Range: 0-1 | Land fraction | |
| TBM_CLM-CN_LEAFC_1d_i01.56cn.nc | 1990-2004 | kg C/m^2 | Leaf carbon (LEAFC) | |
| TBM_CLM-CN_LITTERC_1d_i01.56cn.nc | Litter carbon | |||
| TBM_CLM-CN_NEE_1d_i01.56cn.nc | 1990-2004 | kg C/m^2/mo | NEE | |
| TBM_CLM-CN_NEP_1d_i01.56cn.nc | NEP | |||
| TBM_CLM-CN_NPP_1d_i01.56cn.nc | NPP | |||
| TBM_CLM-CN_SOILC_1d_i01.56cn.nc | 1990-2004 | kg C/m^2 | Total soil organic matter carbon | |
| TBM_CLM-CN_TLAI_1d_i01.56cn.nc | 1990-2004 | dimensionless ratio (m^2/m^2) | Total projected leaf area index | |
| TBM_CLM-CN_TOTVEGC_1d_i01.56cn.nc | 1990-2004 | kg C/m^2 | Total vegetation carbon (derived from LEAFC+WOODC+FROOTC) | |
| TBM_CLM-CN_WOODC_1d_i01.56cn.nc | Wood carbon (WOODC) | |||
| TBM_ORCHIDEE_Supplemental.zip | TBM_ORCHIDEE_GPP_1d_v2.1.nc | 1991-2008 | kg C/m^2/mo | GPP |
| TBM_ORCHIDEE_NEE_1d_v2.1.nc | NEE | |||
| TBM_ORCHIDEE_NEP_1d_v2.1.nc | NEP | |||
| TBM_ORCHIDEE_NPP_1d_v2.1.nc | NPP | |||
| TBM_ORCHIDEE_NPPCrop_1d_v2.1.nc | Net primary production crop (NPPCrop) | |||
| TBM_ORCHIDEE_Rh_1d_v2.1.nc | Heterotrophic respiration (Rh) | |||
Notes: GPP = Gross Primary Production. NEE = Net Ecosystem Exchange. NEP = Net Ecosystem Production. NPP = Net Primary Production.
Table 6. Inverse Model (IM) Output Data Files
| FILE NAMES | TEMPORAL EXTENT | UNITS | VARIABLE | |
|---|---|---|---|---|
| COMPRESSED FILE NAMES * | UNCOMPRESSED DATA FILE NAMES | |||
| IM_CSU-no2_Supplemental.zip | IM_CSU-no2_NEE_1d.nc | 2004 | kg C/m^2/month | NEE |
Notes: NEE = Net Ecosystem Exchange.
2.8. Observation Data and Model Output Variables
Table 7. List of Observation Data and Model Output Variables
| Short Name | Units | Long Name | Temporal Resolution | Observation/Models |
|---|---|---|---|---|
| Gross Primary Productivity (GPP) | ||||
| GPP | kg C m-2 month-1 | gross primary production | monthly | CLM-CASA, CLM-CN, ORCHIDEE (v2.1) |
| GPP Anomaly | kg C m-2 month-1 | gross primary production anomaly | monthly | Flux anomaly |
| Net Primary Productivity (NPP) | ||||
| NPP | kg C m-2 month-1 | net primary production | monthly | CLM-CASA, CLM-CN, ORCHIDEE (v2.1) |
| NPPCrop | kg C m-2 month-1 | net primary production crop | monthly | ORCHIDEE (v2.1) |
| Net Ecosystem Exchange (NEE) | ||||
| NEE | kg C m-2 month-1 | net ecosystem exchange | monthly | CLM-CASA, CLM-CN, ORCHIDEE (v2.1), CSU-no2 |
| NEE Anomaly | kg C m-2 month-1 | net ecosystem exchange anomaly | monthly | Flux Anomaly |
| Net Ecosystem Production | ||||
| NEP | kg C m-2 month-1 | net ecosystem production | monthly | CLM-CASA, CLM-CM |
| Biomass | ||||
| FIA Forest Biomass | kg C m-2 month-1 | conterminous U.S. forest biomass | one time | FIA Forest Biomass |
| Total Respiration | ||||
| Reco Anomaly | kg C m-2 month-1 | ecosystem respiration anomaly | monthly | Flux Anomaly |
| Heterotrophic Respiration | ||||
| Rh | kg C m-2 month-1 | heterotrophic respiration | monthly | ORCHIDEE (v2.1) |
| HR | kg C m-2 month-1 | heterotrophic respiration | monthly | CLM-CASA, CLM-CN |
| Total Soil Carbon: Total soil and litter carbon content vertically integrated over the entire soil column | ||||
| SOILC | kg C m-2 | total soil organic matter C | monthly | CLM-CASA, CLM-CN |
| Leaf Area Index | ||||
| LAI | (-) | leaf area index | monthly | DLEM |
| TLAI | (-) | total projected leaf area index | monthly | CLM-CASA, CLM-CN |
| Coarse Woody Debris Carbon | ||||
| CWDC | kg C m-2 | coarse woody debris C | monthly | CLM-CASA, CLM-CN |
| Wood Carbon | ||||
| WOODC | kg C m-2 | wood C | monthly | CLM-CASA, CLM-CN |
| Fine Root Carbon | ||||
| FROOTC | kg C m-2 | fine root C | monthly | CLM-CASA, CLM-CN |
| Land Fraction | ||||
| landfrac | (-) | land fraction | monthly | CLM-CASA, CLM-CN |
| Forest Land Area | ||||
| Forest area | m-2 | conterminous U.S. forest area | one time | FIA Forest Biomass |
| Leaf Carbon | ||||
| LEAFC | kg C m-2 | leaf C | monthly | CLM-CASA, CLM-CN |
| Litter Carbon | ||||
| LITTERC | kg C m-2 | litter C | monthly | CLM-CASA, CLM-CN |
| Vegetation Carbon | ||||
| VegC | kg C m-2 | vegetation C | monthly | CLM-CASA |
| TOTVEGC | kg C m-2 | total vegetation carbon | monthly | CLM-CN |
| Enhanced Vegetation Index | ||||
| EVI | enhanced vegetation index | monthly | MODIS EVI | |
| Fraction of Photosynthetically Active Radiation | ||||
| fPAR | fraction of photosynthetically active radiation | monthly | MODIS fPAR | |
| Normalized Difference Vegetation Index | ||||
| NDVI | normalized difference vegetation index | monthly | MODIS NDVI | |
2.9. Companion File Information
Table 8. Companion Files
| FILE NAME | DESCRIPTION |
|---|---|
| Regional-Description_of_Observations_and_Models.pdf | Overview of observation measurement data and terrestrial biosphere and inverse models, including descriptions, sources, contacts, and a comprehensive reference list |
| NACP_Model_Characteristics.pdf | Overview of process descriptions in participating TBMs and boundary conditions and driver data used in participating TBMs with a comprehensive reference list |
| NACP_Model_Metadata_Survey_Results.pdf | Metadata for TBMs Intercomparison: Site Model Data Comparison and Regional Model Data Comparison: Survey Results |
This data product contributes to a multidisciplinary research program to obtain scientific understanding of North America's carbon sources and sinks and of changes in carbon stocks needed to meet societal concerns and to provide tools for decision makers. The data were generated by MAST-DC as part of a NACP regional and continental synthesis to evaluate and inter-compare models and observation measurements across North America. Although this work was not used in the NACP regional synthesis activities, the results can be used to compare the model outputs to different observational data products.
This data set provides supplemental observation measurements and model simulation outputs that were compiled but not used in the NACP Regional Synthesis activities. The supplemental observation measurements and model simulation outputs were not used in the regional synthesis for one or more of the following reasons: (1) certain variables were not considered in the regional synthesis; (2) multiple versions of model outputs were provided; (3) the spatial extent of model output did not match the NACP regional synthesis study area, or (4) the spatial resolution did not match other standardized gridded data.
Original model simulation results and observation measurement data were resampled by MAST-DC to a standard 1-degree spatial resolution for North American region (except for FIA Forest Biomass which was resampled to 0.5-degree resolution), interpolated into monthly or yearly temporal resolution, converted to a standard measurement unit (generally, kg C/m2/month or year), and reformatted into CF convention compatible netCDF format.
Information about the specific data processing steps taken by MAST-DC are available by contacting the Data Center as indicated below.
This data set is available through the Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC).
Web Site: http://daac.ornl.gov
E-mail: uso@daac.ornl.gov
Telephone: +1 (865) 241-3952
Denning, A.S., et al. 2005. Science implementation strategy for the North American Carbon Program: A Report of the NACP Implementation Strategy Group of the U.S. Carbon Cycle Interagency Working Group. U.S. Carbon Cycle Science Program, Washington, DC. 68 pp.
Wofsy, S.C., and R.C. Harriss. 2002. The North American Carbon Program (NACP). Report of the NACP Committee of the U.S. Interagency Carbon Cycle Science Program. U.S. Global Change Research Program, Washington, DC. 56 pp.
Additional Sources of Information:
Please see the Reference section in the Regional-Description_of_Observations_and_Models.pdf document for publications related to the observation measurements, TBMs, and IMs used in this study.