Papua New Guinea is largely mountainous, and much of it is covered with tropical rainforest. The New Guinea Highlands (or Central Range) run the length of New Guinea, and the highest areas receive snowfall—a rarity in the tropics. Within Papua New Guinea Mount Wilhelm is the highest peak, at 4,509 m (14,793 ft). There are several major rivers, notably the Sepik River, which is 1,126 km (700 mi) long, which winds through lowland swamp plains to the north coast, and the Fly River at 1,050 km (650 mi) in length, which flows through one of the largest swamplands in the world to the south coast. The Highlands consist of a number of smaller ranges running west to east, such as the Finisterre Range which dominates the Huon Peninsula to the north of the city of Lae. At 462,840 km2 (178,700 sq mi) it is the world's third largest island country.[1]
Papua New Guinea has one land border—that which divides the island of New Guinea. Across the 820 km (509 mi) border is the Indonesian provinces of Papua, Highland Papua and South Papua. Papua New Guinea's border with Indonesia is not straight; the border loops slightly to the west along the Fly River in the south-central part of New Guinea, on the western edge of Papua New Guinea's Western Province. There are maritime borders with Australia to the south and Solomon Islands to the southeast.
Physical geography
Papua New Guinea has a total area of 462,840 km2 (178,700 sq mi), of which 452,860 km2 (174,850 sq mi) is land and 9,980 km2 (3,850 sq mi) is water. This makes it the 3rd largest island country in the world.[1] Its coastline is 5,152 km (3,201 mi) long.[citation needed]
The northernmost point is Mussau Island (1°23' S), southernmost point is Sudest Island (11°65' S), easternmost point is Olava, Bougainville (155°57' E) and the westernmost point is either Bovakaka along the Fly River border with Indonesia or Mabudawan (140°54' E).
Papua New Guinea has several volcanoes, as it is situated along the Pacific Ring of Fire. Volcanic eruptions are not rare, and the area is prone to earthquakes and tsunamis because of this. The volcanic disturbance can often cause severe earthquakes, which in turn can also cause tsunamis. Papua New Guinea is also prone to landslides, often caused by deforestation in major forests. The mountainous regions of Papua New Guinea are the areas most susceptible to landslides causing damage.
Offshore islands include the small, forested Admiralty Islands, the largest of which is Manus, to the north of the main island of New Guinea. These have a distinct plant and animal life from the main island but the natural forest has been cleared in places for logging and agriculture.[2]
A 2019 global remote sensing analysis suggested that there were 1,308 km2 (505 sq mi) of tidal flats in Papua New Guinea, making it the 25th ranked country in terms of tidal flat area.[3]
Tropical; northwest monsoon (December to March), southeast monsoon (May to October); slight seasonal temperature variation. In lower altitudes, the temperature is around 80 °F (27 °C) year round. But higher altitudes are a constant 70 °F (21 °C),[4] and the highest altitudes, especially of Mount Wilhelm and Mount Giluwe, can see snow.[5]
The rainforest is subject to deforestation as a result of growing commercial demand for tropical timber; forest clearance, especially in coastal areas, for plantations; pollution from mining projects. If the trend continues, more than half the forest that existed when Papua New Guinea became independent from Australia in 1975 will be gone by 2021.[20][needs update]
^"Klimatafel von Madang / Papua-Neuguinea"(PDF). Baseline climate means (1961-1990) from stations all over the world (in German). Deutscher Wetterdienst. Retrieved 29 January 2016.
^"Station 92014 Madang W.O". Global station data 1961–1990—Sunshine Duration. Deutscher Wetterdienst. Archived from the original on 2017-10-17. Retrieved 29 January 2016.