Figures & data
Figure 1. National Terrestrial Ecosystem Monitoring System (NTEMS) 30-m land cover map representing the Hudson Plains Ecozone, 2018 (Hermosilla et al. Citation2022, Citation2018).
![Figure 1. National Terrestrial Ecosystem Monitoring System (NTEMS) 30-m land cover map representing the Hudson Plains Ecozone, 2018 (Hermosilla et al. Citation2022, Citation2018).](/cms/asset/2bb05568-921c-40f9-b5f9-dc3bf850c645/ujrs_a_2256895_f0001_c.jpg)
Table 1. Input data sources Sentinel 3 SLSTR LST & NDVI are resampled using bilinear interpolation to match the spatial resolution and grid of SMAP L4C GPP.
Figure 2. 16-Day mean (2017/04/06 to 2017/04/22) LST (degrees Kelvin) (top-left), NDVI (bottom-left) for the Hudson Plains Ecozone (unstratified), combined following the TG concept into an initial estimate of TG GPP (g C m−2 day−1) (middle-right).
![Figure 2. 16-Day mean (2017/04/06 to 2017/04/22) LST (degrees Kelvin) (top-left), NDVI (bottom-left) for the Hudson Plains Ecozone (unstratified), combined following the TG concept into an initial estimate of TG GPP (g C m−2 day−1) (middle-right).](/cms/asset/1d267ecb-3e57-4e2e-99f4-bfc216989e36/ujrs_a_2256895_f0002_c.jpg)
Figure 3. Estimated 16-day mean Gross Primary Productivity (GPP) per stratified land cover type across the Hudson Plains (2018 & 2019), where A = Coniferous > 70% (n = 598), B = Mixed-Wood > 70% (n = 6,440), C = Wetland-Treed > 70% (n = 84,318), and D = Wetlands > 70% (n = 9,016).
![Figure 3. Estimated 16-day mean Gross Primary Productivity (GPP) per stratified land cover type across the Hudson Plains (2018 & 2019), where A = Coniferous > 70% (n = 598), B = Mixed-Wood > 70% (n = 6,440), C = Wetland-Treed > 70% (n = 84,318), and D = Wetlands > 70% (n = 9,016).](/cms/asset/07e24b61-9b1e-4621-81d9-c170adf013df/ujrs_a_2256895_f0003_c.jpg)
Figure 4. Temporal variation of 16 day mean Gross Primary Productivity (GPP), averaged per stratified land cover type across the Hudson Plains (2018 & 2019) predicted by SMAP L4C or the adapted TG model. A = Coniferous > 70%, B = Mixed-Wood > 70%, C = Wetland-Treed > 70%, and D = Wetlands > 70%.
![Figure 4. Temporal variation of 16 day mean Gross Primary Productivity (GPP), averaged per stratified land cover type across the Hudson Plains (2018 & 2019) predicted by SMAP L4C or the adapted TG model. A = Coniferous > 70%, B = Mixed-Wood > 70%, C = Wetland-Treed > 70%, and D = Wetlands > 70%.](/cms/asset/990a60f9-ab69-47d9-964c-35d917be02d4/ujrs_a_2256895_f0004_c.jpg)
Figure 5. General trends of over and under-prediction of seasonal GPP per the adapted TG model, relative to SMAP L4C GPP based on model performance shown in .
![Figure 5. General trends of over and under-prediction of seasonal GPP per the adapted TG model, relative to SMAP L4C GPP based on model performance shown in Figure 3.](/cms/asset/46d98535-ff7f-43be-8967-c6764de90ece/ujrs_a_2256895_f0005_c.jpg)
Figure 6. Proposed Model Framework Structure for CAN-TG. Red boxed indicate primary and secondary data sources. Green box indicates National Terrestrial Ecosystem Monitoring System (NTEMS) land cover attribution information.
![Figure 6. Proposed Model Framework Structure for CAN-TG. Red boxed indicate primary and secondary data sources. Green box indicates National Terrestrial Ecosystem Monitoring System (NTEMS) land cover attribution information.](/cms/asset/35bbefad-e904-488f-b1c7-3fbe468900fa/ujrs_a_2256895_f0006_c.jpg)
Table 2. Primary data sources for proposed modeling framework.