The NASA SMAP mission has a projected 2014 launch and will provide global mapping of surface soil moisture and freeze/thaw conditions using L-band (1.26 GHz) active and passive microwave remote sensing. SMAP science objectives include reducing uncertainty regarding land-atmosphere carbon exchange. An operational level 4 carbon (L4-C) product is planned for quantifying surface soil carbon stocks and net ecosystem CO2 exchange (NEE) using model assimilated SMAP measurements with ancillary land cover and vegetation productivity inputs. We conducted an initial global implementation of the L4-C algorithms using MODIS productivity inputs and MERRA reanalysis daily soil moisture and temperature fields. The L4-C simulations are generally consistent with the distribution and magnitude of soil carbon stocks from global soil inventories. A model uncertainty analysis indicates anticipated NEE product accuracy within 30 g C m2 yr-1 (1.6 g C m2 day-1) and similar to accuracies attained from tower measurements.
|Published - 2011
|34th International Symposium on Remote Sensing of Environment - The GEOSS Era: Towards Operational Environmental Monitoring - Sydney, NSW, Australia
Duration: Apr 10 2011 → Apr 15 2011
|34th International Symposium on Remote Sensing of Environment - The GEOSS Era: Towards Operational Environmental Monitoring
|04/10/11 → 04/15/11
- Soil moisture active passive