add anomaly climatology and make lfs default for netCDF

.gitattributes

@@ -33,3 +33,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.zip filter=lfs diff=lfs merge=lfs -text
 *.zst filter=lfs diff=lfs merge=lfs -text
 *tfevents* filter=lfs diff=lfs merge=lfs -text
+*.nc filter=lfs diff=lfs merge=lfs -text

climatology/anomaly_variance_surface.nc

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6c21b953f7f60f3bb80a1007e49227c5c018a26e3eb7d1a080a8d7bcf3ab7dfc
+size 11540

climatology/anomaly_variance_vertical.nc

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4317f4c8c89b1e604bca44841bf085603c91b8c70f92b37bee536f99c83222bb
+size 18550