Change 79472 had a related patch set uploaded by Hoo man:
Add extra accessibility labels to jump to citation links

https://gerrit.wikimedia.org/r/79472

Asked for feedback: https://en.wikipedia.org/w/index.php?title=Wikipedia_talk%3AWikiProject_Accessibility&diff=569083219&oldid=568484980

The text should be as concise as possible, so therefore "jump back" should be used.

Actually "jump up" might be more accurate ... it's entirely possible (but rare) that a user is reading the references and has not yet read the text associated with the citation. I occasionally do this when checking reference formatting. For whatever it's worth the English Wikipedia currently uses the "^" symbol (pronounced by screen readers as "carrot") instead of the up arrow for the backlink.

(In reply to comment #4)

For whatever it's worth the English Wikipedia currently uses the "^" symbol
(pronounced by screen readers as "carrot") instead of the up arrow for the
backlink.

The single backlink character is defined by 'MediaWiki:Cite references link many' and 'MediaWiki:Cite references link one'. The single backlink character defaults to ↑ but is changed to ^ on the English Wikipedia.

Change 79472 merged by jenkins-bot:
Add extra accessibility labels to jump to citation (↑) links

https://gerrit.wikimedia.org/r/79472

On a side note, I asked on en.wp to replace the carets with proper arrows: https://en.wikipedia.org/wiki/Help_talk:Cite_messages#An_arrow_.E2.86.91_or_a_caret_.5E.3F

See this village pump thread about the CSS solution: https://en.wikipedia.org/wiki/Wikipedia:Vpt#Scrolling_past_the_bottom_of_the_page...