Something about "East Antarctica" confuses me.
I hear you, because of course the continent of Antarctica straddles the South Pole, so it seems hard to establish what part of the continent is east of the remainder of the continent. But "east Antarctica" is a standard geographic term, at least in English,[1] and I frequently see the term in news reports about climate research in Antarctica. I see that the presence of the Transantarctic Mountains makes it feasible to distinguish different parts of the continent for a label like this.
[1] "East Antarctica, also called Greater Antarctica, constitutes the majority (two-thirds) of the Antarctic continent, lying on the Indian Ocean side of the Transantarctic Mountains."