Table 2.
List of Environmental Variables and Their Abbreviations
| Variable | Description | Data source |
|---|---|---|
| NDVI_a | Normalized Difference Vegetation Index (Bands: red, nir) | MODIS MCD43A4 Collection 6 |
| NDWI_a | Normalized Difference Water Index (Bands: green, nir) | MODIS MCD43A4 Collection 6 |
| NDWI2_a | Normalized Difference Water Index 2 (Bands: nir, swir2) | MODIS MCD43A4 Collection 6 |
| MNDWI_a | Modified Normalized Difference Water Index (Bands: green, swir2) | MODIS MCD43A4 Collection 6 |
| TcWet_a | Tasseled cap transformation wetness | MODIS MCD43A4 Collection 6 |
| TcGreen_a | Tasseled cap transformation greenness | MODIS MCD43A4 Collection 6 |
| TcBright_a | Tasseled cap transformation brightness | MODIS MCD43A4 Collection 6 |
| Prec_a | Total precipitation | NLDAS |
| RH_a | Relative humidity | NLDAS |
| VPD_a | Vapor pressure deficit | NLDAS |
| Temp_a | Daily mean temperature | NLDAS |
| Crop | Cultivated cropland | NLCD |
| Pasture | Pasture/hay | NLCD |
| Develop | Developed land | NLCD |
| Forest | Forest | NLCD |
| Grass | Grassland | NLCD |
| Lakes | Lakes | NWI |
| Ponds | Ponds | NWI |
| River | Riverine | NWI |
| ForestWetland | Forested/shrub wetland | NWI |
| Emergent | Emergent wetlands | NWI |
| Elevation | Elevation | NED |
| PondFr | Ponding frequency | SSURGO |
a
We calculated four seasonal summaries for each of these variables. EarlyMean: May/June interannual mean, EarlySD: May/June interannual standard deviation, LateMean: May/June interannual mean, and LateSD: July/August interannual standard deviation. MODIS = Moderate Resolution Imaging Spectroradiometer; NLDAS = North American Land Data Assimilation System; NLCD = National Land Cover Database; NWI = National Wetlands Inventory; NED = National Elevation Data Set; SSURGO = Soil Survey Geographic.