Move README images under imgs

README.md

@@ -25,7 +25,7 @@ tags:
 viewer: false
 ---
 
-<img src="MASCOT.png" align="right" width="220" alt="ThousandWorlds mascot">
+<img src="imgs/MASCOT.png" align="right" width="220" alt="ThousandWorlds mascot">
 
 # ThousandWorlds
 
@@ -40,7 +40,7 @@ are time-averaged climate fields on a 32 x 64 latitude-longitude grid:
 three-dimensional variables are stored as pressure-level channels, and
 two-dimensional variables are stored as single fields.
 
-![ThousandWorlds dataset schematic](OVERVIEW.png)
+![ThousandWorlds dataset schematic](imgs/OVERVIEW.png)
 
 ## Quickstart
 
@@ -151,17 +151,13 @@ The gridded field archives are:
 | `dataset/fields/all-obs.npz` | `(1760, 53, 32, 64)` | Field archive covering all 5 GCMs with structured whole-field missingness. |
 | `dataset/fields/complete-obs-only.npz` | `(1659, 48, 32, 64)` | Complete-observation field archive. |
 
-### Spectral Coefficients
-
+**Spectral Coefficients:**
 The spectral coefficient archives mirror those field archives with T21
 spherical harmonic coefficients: `dataset/coefficients/*.npz` stores
 `coefficients` with 484 coefficients per field and a `field_mask` for missing
 fields. Whole-field missingness is represented as all-NaN gridded channels and
 as false entries in the spectral `field_mask`.
 
-Target GCMs are ExoCAM and UM. Auxiliary GCMs are ExoCAM pre-2022, ExoPlaSim,
-and LFRic.
-
 ## Evaluation
 
 The package includes loaders and metrics for two benchmark protocols: