All content except for the footer blocks are editable by users with the "Homepage editor" role (Alison Rockwell).
The main content of the homepage is editable here: https://www.eol.ucar.edu/node/5459/edit
Editable here: https://www.eol.ucar.edu/node/5460/edit
Editable here: https://www.eol.ucar.edu/admin/structure/block/manage/block/2/configure
Editable here: https://www.eol.ucar.edu/content/opportunities
These footer block are only editable by site administrators. If a change needs to be made to one of them please contact Alison Rockwell