page_title: Kiribati
section_title: Environmental issues
hierarchical_section_title: Kiribati / Geography / Environmental issues
caption_attribution_description: English: Onotoa Atoll from the East, from an airplane midway from Tabiteuea and Arorae atolls, Gilbert Islands, Republic of Kiribati, Central Pacific. Galego: Est do atolón de Onotoa, dende avioneta entre atolóns de Tabiteuea e Arorae, Illas Gilbert, República de Kiribati, Pacífico Central.
context_page_description: Kiribati, officially the Republic of Kiribati, is an independent country in the central Pacific Ocean. The permanent population is just over 110,000, more than half of whom live on Tarawa atoll. The state comprises 32 atolls and one raised coral island, Banaba. They have a total land area of 811 square kilometres and are dispersed over 3.5 million km².
  Their spread straddles the equator and the 180th meridian, although the International Date Line goes round Kiribati and swings far to the east, almost reaching the 150° W meridian. This brings Kiribati's easternmost islands, the southern Line Islands south of Hawaii, into the same day as the Gilbert Islands and places them in the most advanced time zone on Earth: UTC+14. Kiribati is one of the few countries in the world to be situated in all four hemispheres.
  Kiribati gained its independence from the United Kingdom, becoming a sovereign state in 1979. The capital, South Tarawa, now the most populated area, consists of a number of islets, connected by a series of causeways. These comprise about half the area of Tarawa atoll.
context_section_description: According to the Pacific Regional Environment Programme (previously South Pacific Regional Environment Programme), two small uninhabited Kiribati islets, Tebua Tarawa and Abanuea, disappeared underwater in 1999. The United Nations Intergovernmental Panel on Climate Change predicts that sea levels will rise by about 50 cm (20 in) by 2100 due to global warming and a further rise would be inevitable. It is thus likely that within a century the nation's arable land will become subject to increased soil salination and will be largely submerged.
  The exposure of Kiribati to changes in sea levels is exacerbated by the Pacific decadal oscillation, which is a climate switch phenomenon that results in changes from periods of La Niña to periods of El Niño. This has an effect on sea levels. For example, in 2000 there was a switch from periods of downward pressure of El Niño on sea levels to an upward pressure of La Niña on sea levels, which upward pressure causes more frequent and higher high tide levels. The Perigean spring tide (often called a king tide) can result in seawater flooding low-lying areas of the islands of Kiribati.
  The atolls and reef islands can respond to changes in sea-level. Paul Kench at the University of Auckland in New Zealand and Arthur Webb at the South Pacific Applied Geoscience Commission in Fiji released a study in 2010 on the dynamic response of atolls and reef islands in the central Pacific. Kiribati was mentioned in the study, and Webb and Kench found that the three major urbanised islands in Kiribati—Betio, Bairiki and Nanikai—increased by 30% (36 hectares), 16.3% (5.8 hectares) and 12.5% (0.8 hectares), respectively.
  The study by Paul Kench and Arthur Webb recognises that the islands are extremely vulnerable to sea level rise, and concluded that: "This study did not measure vertical growth of the island surface nor does it suggest there is any change in the height of the islands. Since land height has not changed the vulnerability of the greater part of the land area of each island to submergence due to sea level rise is also unchanged and these low-lying atolls remain immediately and extremely vulnerable to inundation or sea water flooding."
  The Climate Change in the Pacific Report of 2011 describes Kiribati as having a low risk of cyclones; however in March 2015 Kiribati experienced flooding and destruction of seawalls and coastal infrastructure as the result of Cyclone Pam, a Category 5 cyclone that devastated Vanuatu. Kiribati remains exposed to the risk that cyclones can strip the low-lying islands of their vegetation and soil.
  Gradual sea-level rise also allows for coral polyp activity to raise the atolls with the sea level. However, if the increase in sea level occurs at a rate faster than coral growth, or if polyp activity is damaged by ocean acidification, then the resilience of the atolls and reef islands is less certain. Also, coral bleaching has led to the death of up to 80% of the coral.
  The Kiribati Adaptation Program (KAP), started in 2003, is a US$5.5 million initiative that was originally enacted by the national government of Kiribati with the support of the Global Environment Facility (GEF), the World Bank, the United Nations Development Program, and the Japanese government. Australia later joined the coalition, donating US$1.5 million to the effort. The program aims to take place over six years, supporting measures that reduce Kiribati's vulnerability to the effects of climate change and sea level rise by raising awareness of climate change, assessing and protecting available water resources, and managing inundation.
  At the start of the Adaptation Program, representatives from each of the inhabited atolls identified key climatic changes that had taken place over the past 20–40 years and proposed coping mechanisms to deal with these changes under four categories of urgency of need. The program is now focusing on the country's most vulnerable sectors in the most highly populated areas.
  Initiatives include improving water supply management in and around Tarawa; coastal management prote
caption: South of Onotoa Atoll
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