| Upernattivik Upernarsuak | |
| Map: | Greenland |
| Location: | North Atlantic Ocean Southeastern Greenland |
| Coordinates: | 64.2333°N -91°W |
| Area Km2: | 149 |
| Length Km: | 18 |
| Width Km: | 11 |
| Elevation M: | 617 |
| Country: | Greenland |
| Country Admin Divisions Title: | Municipality |
| Country Admin Divisions: | Sermersooq |
| Population: | 0 |
Upernattivik – also known as Upernarsuak[1] – is an uninhabited island in King Frederick VI Coast, southeastern Greenland.[2] Administratively it is part of the Sermersooq municipality.[3]
Upernattivik is a coastal island in Umivik Bay, located between the Fridtjof Nansen Peninsula to the north and the Odinland Peninsula to the south. The Torsukattak is an 8000NaN0 wide sound that separates the island from the mainland in the north and the broader Umiiviip Kangertiva Fjord is located to the south.[4]
The island is 180NaN0 long with a maximum width of 110NaN0.[5] There are some smaller islands in its vicinity, such as Trefoldigheden, Terne Island and Tre Lover to the west and Pikiitsi off its eastern point.[4]