This document is the user guide of SMAP L4 Global Daily 9 km EASE-Grid Carbon Net Ecosystem Exchange, Version 7, which introduces the description of data, file information, spatial information, temporal information, data acquisition and processing.
This document serves as a user guide for the SMAP L4 Global Daily 9 km EASE-Grid Carbon Net Ecosystem Exchange, Version 7. It details the data parameters, including Net Ecosystem Exchange (NEE), Gross Primary Production (GPP), Heterotrophic Respiration (RH), and Soil Organic Carbon (SOC). The guide explains that all parameters are expressed in units of g C m-2 day-1 and are provided for eight vegetated land cover classes known as Plant Functional Types (PFTs).
The document covers data acquisition, processing techniques, and quality assessment. It specifies that data are distributed in HDF5 format and covers the globe from 180°W to 180°E and approximately 85.044°N to 85.044°S. The product is gridded at a 9 km EASE-Grid 2.0 resolution, derived from inputs at 500 m and 1 km resolutions.
| Data Format | HDF5 |
|---|---|
| Spatial Coverage | 180°W to 180°E, 85.044°N to 85.044°S |
| Spatial Resolution | 9 km |
| Units | g C m-2 day-1 |
| Data Volume (Yearly) | 48.2 GB |
| Grid Dimensions | 1624 rows x 3856 columns |
All parameters are expressed in units of g C m-2 day-1.
The data are provided in HDF5 format.
The CO2 flux state variable outputs are provided for eight vegetated land cover classes called Plant Functional Types (PFTs).