Update dataset card

README.md

@@ -66,7 +66,7 @@ scores["per_variable"]
 ```
 
 See the GitHub repository for notebooks, baseline code, evaluation utilities,
-and reproducibility instructions.
+and reproducing paper results.
 
 ## Files
 
@@ -104,8 +104,7 @@ The subset split files contain:
 | `test_shared_planets_only.csv` | - | 58 | 60 |
 | `held_out_aux.csv` | - | 31 | 34 |
 
-`held_out_aux.csv` is excluded from train and test; it accounts for the
-remaining simulations in the two multi-GCM subsets.
+`held_out_aux.csv` is excluded from train and test to prevent train-test leakage (it contains simulations from auxiliary GCMs that correspond to identical planets present in the test set).
 
 ## Inputs and Outputs
 
@@ -132,16 +131,16 @@ and outgoing longwave radiation. Gridded targets are provided on a 32 x 64
 latitude-longitude grid, with vertical fields stored on relative pressure
 levels.
 
-| Variable | Unit |
-| --- | --- |
-| Surface temperature | K |
-| Temperature | K |
-| Specific humidity | dex |
-| Cloud fraction | 1 |
-| East-west wind | m s^-1 |
-| North-south wind | m s^-1 |
-| Absorbed shortwave radiation | W m^-2 |
-| Outgoing longwave radiation | W m^-2 |
+| Variable | Dimensionality | Unit |
+| --- | --- | --- |
+| Surface temperature | 2D | K |
+| Temperature | 3D | K |
+| Specific humidity | 3D | dex |
+| Cloud fraction | 3D | 1 |
+| East-west wind | 3D | m s^-1 |
+| North-south wind | 3D | m s^-1 |
+| Absorbed shortwave radiation | 2D | W m^-2 |
+| Outgoing longwave radiation | 2D | W m^-2 |
 
 The gridded field archives are: