Google Scholar Watchpoints
Google Scholar Profiles should NEVER be set up using a UC San Diego email address - they do not have a method of transferring a Profile to another email address.
If you have created a Google Scholar Profile that is managed by your @eng.ucsd.edu Google account, there are two options for your Scholar Profile:
Recreate your Scholar Profile tied to a different account
BEFORE your eng.ucsd.edu account closes, you can go into Google Scholar and Delete your Scholar Profile. Then when you create a new Scholar Profile that is tied to another Google account, you won't now have two profiles.
To Delete your Scholar Profile, open Google Scholar while signed into the Google account that manages it. Click on menu button (upper left) and choose Settings > Account. Click on "Delete Scholar account" and read/follow prompts.
Scholar Profile deletes after management Google account is deleted
If you leave your Scholar Profile in place, and the Google account that manages it is closed/deleted, the Profile will become read-only, and you will be unable to make any additional edits to the Profile. I have confirmed that if the Google account that manages the Scholar Profile is deleted, the Scholar Profile is also eventually deleted.