Southern hemisphere
From Tardis Wiki, the free Doctor Who reference
According to the Fourth Doctor, Napier was in the southern hemisphere of Earth, and therefore experienced Christmas in the summer. (PROSE: Autaia Pipipi Pia [+]Loading...["Autaia Pipipi Pia (short story)"])
South America, South Africa, Australia and Polynesia were both located in the southern hemisphere, as was Antarctica. (PROSE: Iceberg [+]Loading...["Iceberg (novel)"], Time and Relative [+]Loading...["Time and Relative (novel)"])
According to a book owned by Chloe Webber, the Equator was an imaginary line which divided the planet into two halves or hemispheres. (TV: Fear Her [+]Loading...["Fear Her (TV story)"])