Update ERA5 data downloading instructions for CDS-Beta and fix some d…

…ocs typos (#17)

* Update example_era5.ipynb

Update `Downloading the Data` instructions for CDS-Beta.
Fix attribute for `surf_vars_ds` and `atmos_vars_ds` when instantiating a Batch.

* Update example_era5.ipynb

Add info about accepting terms of use to be able to download the dataset.

* Update example_hres_t0.ipynb

Update instructions for downloading ERA5 data according to CDS-Beta platform.
Fix attributes calling for `surf_vars_ds` and `atmos_vars_ds`.

* Update example_hres_t0.ipynb

Fix formatting

* Update example_hres_t0.ipynb

Add new line

* Update batch.md

Replace `Batch.static_vars` with `Batch.atmos_vars`

docs/batch.md

@@ -76,7 +76,7 @@ The following static variables are allowed:
 
 ## `Batch.atmos_vars`
 
-`Batch.static_vars` is a dictionary mapping names of atmospheric variables to the
+`Batch.atmos_vars` is a dictionary mapping names of atmospheric variables to the
 numerical values of the variables.
 The atmospheric variables must be of the form `(b, t, c, h, w)` where `b` is the batch size,
 `t` the history dimension, `c` the number of pressure levels, `h` the number of latitudes,

docs/example_era5.ipynb

@@ -17,14 +17,16 @@
     "\n",
     "## Downloading the Data\n",
     "\n",
-    "To begin with, register an account with the [Climate Data Store](https://cds.climate.copernicus.eu/) and create `$HOME/.cdsapirc` with the following content:\n",
+    "To begin with, register an account with the [Climate Data Store](https://cds-beta.climate.copernicus.eu/) and create `$HOME/.cdsapirc` with the following content:\n",
     "\n",
     "```\n",
-    "url: https://cds.climate.copernicus.eu/api/v2\n",
-    "key: <UID>:<API key>\n",
+    "url: https://cds-beta.climate.copernicus.eu/api\n",
+    "key: <API key>\n",
     "```\n",
     "\n",
-    "You can find your UID and API key on your account page.\n",
+    "You can find your API key on your account page.\n",
+    "\n",
+    "In order to be able to download ERA5 data, you need to accept the terms of use in the [dataset page](https://cds-beta.climate.copernicus.eu/datasets/reanalysis-era5-single-levels?tab=download).\n",
     "\n",
     "We now download the ERA5 data."
    ]
@@ -196,8 +198,8 @@
     "        # Converting to `datetime64[s]` ensures that the output of `tolist()` gives\n",
     "        # `datetime.datetime`s. Note that this needs to be a tuple of length one:\n",
     "        # one value for every batch element.\n",
-    "        time=(surf_vars_ds.time.values.astype(\"datetime64[s]\").tolist()[i],),\n",
-    "        atmos_levels=tuple(int(level) for level in atmos_vars_ds.level.values),\n",
+    "        time=(surf_vars_ds.valid_time.values.astype(\"datetime64[s]\").tolist()[i],),\n",
+    "        atmos_levels=tuple(int(level) for level in atmos_vars_ds.pressure_level.values),\n",
     "    ),\n",
     ")"
    ]

docs/example_hres_t0.ipynb

@@ -88,14 +88,16 @@
     "## Downloading Static Variables from ERA5 Data\n",
     "\n",
     "The static variables are not available in WeatherBench2, so we need to download them from ERA5, just like we did [in the example for ERA5](example_era5#downloading-the-data).\n",
-    "To do so, register an account with the [Climate Data Store](https://cds.climate.copernicus.eu/) and create `$HOME/.cdsapirc` with the following content:\n",
+    "To do so, register an account with the [Climate Data Store](https://cds-beta.climate.copernicus.eu/) and create `$HOME/.cdsapirc` with the following content:\n",
     "\n",
     "```\n",
-    "url: https://cds.climate.copernicus.eu/api/v2\n",
-    "key: <UID>:<API key>\n",
+    "url: https://cds-beta.climate.copernicus.eu/api\n",
+    "key: <API key>\n",
     "```\n",
     "\n",
-    "You can find your UID and API key on your account page."
+    "You can find your API key on your account page.\n",
+    "\n",
+    "In order to be able to download ERA5 data, you need to accept the terms of use in the [dataset page](https://cds-beta.climate.copernicus.eu/datasets/reanalysis-era5-single-levels?tab=download)."
    ]
   },
   {
@@ -220,8 +222,8 @@
     "        # Converting to `datetime64[s]` ensures that the output of `tolist()` gives\n",
     "        # `datetime.datetime`s. Note that this needs to be a tuple of length one:\n",
     "        # one value for every batch element.\n",
-    "        time=(surf_vars_ds.time.values.astype(\"datetime64[s]\").tolist()[i],),\n",
-    "        atmos_levels=tuple(int(level) for level in atmos_vars_ds.level.values),\n",
+    "        time=(surf_vars_ds.valid_time.values.astype(\"datetime64[s]\").tolist()[i],),\n",
+    "        atmos_levels=tuple(int(level) for level in atmos_vars_ds.pressure_level.values),\n",
     "    ),\n",
     ")"
    ]