Table 1.
Unconditional models used for model selection.
| log(NPP) | |
|---|---|
| Estimate (CI) | |
| Fixed parts | |
| Intercept | 5.135*** (4.59–5.68) |
| Year | −0.000 (−0.01–0.01) |
| Year2 | 0.001*** (0.00–0.00) |
| Random parts | |
| σ2 | 0.160 |
| τ00, Watershed_ID | 1.781 |
| τ00, County_ID | 1.354 |
| NWatershed_ID | 1,817 |
| NCounty_ID | 18 |
| ICCWatershed_ID | 0.541*** |
| ICCCounty_ID | 0.411*** |
| Observations | 10,663 |
| R2 | 0.932 |
| Akaike Information Criterion | 17,554.005 |
Notes: (1) t statistics in parentheses; (2) ***, ** and *denote 1%, 5%, and 10% significance levels, respectively.