diff --git a/.gitignore b/.gitignore
index eea6a81..0cba5c0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -132,3 +132,6 @@ dmypy.json
 
 #demo directory
 notebooks/intake-demo/
+
+# IDEs
+.vscode/
diff --git a/_config.yml b/_config.yml
index 0eed260..8054eae 100644
--- a/_config.yml
+++ b/_config.yml
@@ -80,3 +80,4 @@ sphinx:
       footer_start:
         - footer-logos
         - footer-info
+        - footer-menu
diff --git a/_static/footer-logo-nsf.png b/_static/footer-logo-nsf.png
new file mode 100644
index 0000000..11c788f
Binary files /dev/null and b/_static/footer-logo-nsf.png differ
diff --git a/_templates/footer-extra.html b/_templates/footer-extra.html
new file mode 100644
index 0000000..27cb915
--- /dev/null
+++ b/_templates/footer-extra.html
@@ -0,0 +1,27 @@
+<div class="container-fluid footer-extra">
+    <div class="container">
+      <center>
+        Theme by <a href="https://projectpythia.org">Project Pythia</a>. All code
+        in Pythia Cookbooks is licensed under
+        <a href="https://opensource.org/license/apache-2-0">Apache 2.0</a>. All
+        other non-code content is licensed under
+        <a href="https://creativecommons.org/licenses/by/4.0/">
+          Creative Commons BY 4.0 (CC BY 4.0)</a
+        >.
+      </center>
+      <br /><br />
+      <div class="row">
+        <p class="m-0">
+          <img
+            src="{{ pathto('_static/footer-logo-nsf.png', 1) }}"
+            style="float: left; width: 60px; height: 60px; margin-right: 1rem"
+          />
+          This material is based upon work supported by the National Science
+          Foundation under Grant Nos. 2026863 and 2026899. Any opinions, findings,
+          and conclusions or recommendations expressed in this material are those
+          of the author(s) and do not necessarily reflect the views of the
+          National Science Foundation.
+        </p>
+      </div>
+    </div>
+  </div>
\ No newline at end of file
diff --git a/environment.yml b/environment.yml
index a28d7d6..e5d805f 100644
--- a/environment.yml
+++ b/environment.yml
@@ -9,6 +9,7 @@ dependencies:
   - s3fs
   - intake
   - intake-xarray
+  - numpy<2
   - pip
   - cartopy
   - matplotlib
diff --git a/notebooks/catalog.yml b/notebooks/catalog.yml
index 9e8be95..223f9b2 100644
--- a/notebooks/catalog.yml
+++ b/notebooks/catalog.yml
@@ -5,8 +5,7 @@ metadata:
 sources:
   data_dictionary:
     args:
-      csv_kwargs:
-        keep_default_na: false
+      keep_default_na: false
       urlpath: '{{ CATALOG_DIR }}/inventory.csv'
     description: Describes the data in the hrrrzarr source
     driver: intake.source.csv.CSVSource
diff --git a/notebooks/creating_catalogs.ipynb b/notebooks/creating_catalogs.ipynb
index c84f623..d3df168 100644
--- a/notebooks/creating_catalogs.ipynb
+++ b/notebooks/creating_catalogs.ipynb
@@ -67,7 +67,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 1,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -102,7 +102,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 2,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -212,7 +212,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 6,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -248,7 +248,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 7,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -290,14 +290,13 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 9,
    "metadata": {
     "tags": []
    },
    "outputs": [],
    "source": [
-    "source = intake.open_csv('inventory.csv',\n",
-    "                                  csv_kwargs={'keep_default_na': False})\n",
+    "source = intake.open_csv('inventory.csv')\n",
     "source.name = 'data_dictionary'\n",
     "source.description = 'Describes the data in the hrrrzarr source'"
    ]
@@ -399,7 +398,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 14,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -502,7 +501,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "intake-cookbook-dev",
    "language": "python",
    "name": "python3"
   },
@@ -516,7 +515,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.12.2"
+   "version": "3.12.7"
   },
   "nbdime-conflicts": {
    "local_diff": [
diff --git a/notebooks/intake_introduction.ipynb b/notebooks/intake_introduction.ipynb
index 3563fc8..d018643 100644
--- a/notebooks/intake_introduction.ipynb
+++ b/notebooks/intake_introduction.ipynb
@@ -67,7 +67,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 1,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -289,7 +289,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 20,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -409,7 +409,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "intake-cookbook-dev",
    "language": "python",
    "name": "python3"
   },
@@ -423,7 +423,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.5"
+   "version": "3.12.7"
   },
   "nbdime-conflicts": {
    "local_diff": [