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World Meteorological Organization

WMO releases The State of the Climate in the South-West Pacific 2022 report

Elizabeth BakerBy Elizabeth BakerAugust 30, 20236 Mins Read
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The World Meteorological Organization (WMO) has released The State of the Climate in the South-West Pacific 2022 report, which has found that sea-level rise is threatening the future of low-lying islands in the South-West Pacific while increasing ocean heat and acidification are harming vital and vulnerable marine ecosystems.

The report provides a snapshot of climate indicators including temperatures, sea-level rise, ocean heat and acidification, and extreme weather events in 2022. It also highlights the socio-economic risks and impacts on key sectors like agriculture.

The report, along with an interactive story map, is one of a series of five regional reports and a global report from WMO providing the latest climate insights to inform decision making. According to the report, the three-year-long La Niña event had a clear influence on temperatures in 2022. But despite its temporary cooling influence, it was still a warm year for the region. The mean temperature in 2022 was 0.2°C to 0.3°C higher than during the last strong La Niña event in 2011.

Professor Petteri Taalas, secretary-general of the WMO, said, “The El Niño, which followed three years of La Niña conditions, is very likely to continue during the rest of the year. This will have a big impact on the South-West Pacific region as it is frequently associated with higher temperatures, disruptive weather patterns and more marine heatwaves and coral bleaching.”

Compared with 2021, the number of reported disaster events decreased. However, economic losses increased. Economic damage due to flooding was US$8.5bn, almost triple compared with the previous year, with most of the damage attributable to a series of flooding events in Australia. Tropical storms Megi and Nalgae caused devastating flooding in the Philippines.

Prof. Taalas continued, “Early warning is one of the most effective ways of reducing damage from disasters, as it empowers people to make risk-informed decisions for food security, as well as other sectors. Despite continuous efforts to strengthen multi-hazard early warning systems, the present report clearly shows that there are still significant gaps to be addressed.”

Armida Salsiah Alisjahbana, under-secretary-general of the United Nations and executive secretary of the Economic and Social Commission for Asia Pacific, added, “The Early Warnings for All initiative is critical in the Pacific, which is characterized by distinct disaster risk hotspots that are intensifying and expanding as climate-related hydrometeorological disasters intensify. ESCAP and WMO, working in partnership, will continue to invest in raising climate ambition and accelerating the implementation of policy actions, which includes bringing early warnings to all in the region so that no one is left behind as our climate change crisis continues to evolve.”

The report shows how the agriculture sector is one of the most critical sectors affected by climate-related disasters, echoing the national adaptation plans of many countries in the South-West Pacific. Enhancing the resilience of food systems is therefore a high priority.

 

Blue Pacific

Sefanaia Nawadra, director-general of the Secretariat of the Pacific Regional Environment Programme (SPREP), said, “Our Pacific people are at the forefront of the impact of the triple planetary crises of climate change, biodiversity loss and pollution. Our Pacific leaders have already declared a climate emergency, reaffirming that this is now the single greatest existential threat facing the Blue Pacific.”

The WMO report says that sea-level rise rates were, in general, slightly higher than the global mean rate, reaching approximately 4mm per year in several areas. Despite La Niña conditions, marine heatwaves occurred in various parts of the region. The most prominent and persistent marine heatwaves reportedly occurred in a large area northeast of Australia and south of Papua New Guinea in the Solomon and Coral Seas, over a period of more than six months.

The ocean has taken up more than 90% of the excess heat in the climate system. Ocean warming contributes about 40% of the observed global mean sea-level rise through the thermal expansion of seawater. It is altering ocean currents, indirectly altering storm tracks and affecting marine ecosystems.

Most of the regions in the South-West Pacific show upper-ocean (0-700m) warming since 1993. Warming is particularly strong – with rates exceeding two to three times the global average warming rates – in the Solomon Sea and east of the Solomon Islands; in the Arafura, Banda and Timor Seas; east of the Philippines; along the southern coast of Indonesia and in the Tasman Sea, according to the report.

In Indonesia, satellite estimates of the area of a glacier in the western part of the island of New Guinea showed a total ice area in April 2022 of 0.23km2, a decrease of about 15% from the previous assessment of 0.27km2 in July 2021. From 2016 to 2022, the average reduction in ice area was approximately 0.07km2 per year. Measurements of ice thickness via a single stake show a reduction in thickness of 24m from June 2010 to the beginning of 2021, and the estimated remaining ice thickness in December 2022 was just 6m.

Climate-related impacts and risks

La Niña conditions contributed to significant rainfall anomalies in the region. Most of the equatorial Pacific islands experienced drier-than-normal conditions, and Kiribati and Tuvalu suffered from significant water shortages at times during the year. At the other extreme, Australia suffered significant economic loss due to severe floods.

In 2022, a total of 35 natural hazard events were reported in the South-West Pacific according to the International Disaster Database (EM-DAT), of which over 70% were flood events. These resulted in over 700 fatalities, of which over 70% were associated with storms. Over eight million people were directly affected by these hazards, which caused total economic damage of close to US$9bn. Storms were the leading cause of death and affected the greatest number of people in 2022, especially in the Philippines and Fiji.

A comparison of the economic losses from disasters in the South-West Pacific region in 2022 with the average over the past 20 years (2002-2021) shows that the losses associated with flooding in 2022 (an estimated US$8.5bn) were more than four times the average. In 2022, as an aggregate, flooding caused the highest economic losses in Australia, where the total was over US$8bn, followed by Indonesia (over US$74m) and the Philippines (over US$11m).

Click here for more news from the WMO.

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