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WMO: 2023 shatters climate records, with major impacts

WMO: 2023 shatters climate records, with major impacts

Baku, December 1, AZERTAC

2023 has shattered climate records, accompanied by extreme weather which has left a trail of devastation and despair, said the World Meteorological Organization (WMO) in its report launched on Thursday.

The WMO provisional State of the Global Climate report confirms that 2023 is set to be the warmest year on record. Data until the end of October shows that the year was about 1.40 degrees Celsius (with a margin of uncertainty of ±0.12°C )above the pre-industrial 1850-1900 baseline. The difference between 2023 and 2016 and 2020 - which were previously ranked as the warmest years - is such that the final two months are very unlikely to affect the ranking.

The past nine years, 2015 to 2023, were the warmest on record. The warming El Niño event, which emerged during the Northern Hemisphere spring of 2023 and developed rapidly during summer, is likely to further fuel the heat in 2024 because El Niño typically has the greatest impact on global temperatures after it peaks.

“Greenhouse gas levels are record high. Global temperatures are record high. Sea level rise is record high. Antarctic sea ice is record low. It’s a deafening cacophony of broken records,” said WMO Secretary-General Prof. Petteri Taalas.

“These are more than just statistics. We risk losing the race to save our glaciers and to rein in sea level rise. We cannot return to the climate of the 20th century, but we must act now to limit the risks of an increasingly inhospitable climate in this and the coming centuries,” he said.

“Extreme weather is destroying lives and livelihoods on a daily basis – underlining the imperative need to ensure that everyone is protected by early warning services,” said Prof. Taalas.

Carbon dioxide levels are 50 % higher than the pre-industrial era, trapping heat in the atmosphere. The long lifetime of CO2 means that temperatures will continue to rise for many years to come.

The rate of sea level rise from 2013-2022 is more than twice the rate of the first decade of the satellite record (1993-2002) because of continued ocean warming and melting of glaciers and ice sheets.

The maximum Antarctic sea-ice extent for the year was the lowest on record, a full 1 million km2 (more than the size of France and Germany combined) less than the previous record low, at the end of southern hemisphere winter. Glaciers in North America and Europe once again suffered an extreme melt season. Swiss glaciers have lost about 10 percent of their remaining volume in the past two years, according to the WMO report.

The report shows the global reach of climate change. It provides a snapshot of socio-economic impacts, including on food security and population displacement.

“This year we have seen communities around the world pounded by fires, floods and searing temperatures. Record global heat should send shivers down the spines of world leaders,” said United Nations Secretary-General António Guterres.

In a video message accompanying WMO’s climate report, Mr Guterres urges leaders to commit to urgent action at the UN Climate Change negotiations, COP28. There is still hope, he said.

“We have the roadmap to limit the rise in global temperature to 1.5 °C and avoid the worst of climate chaos. But we need leaders to fire the starting gun at COP28 on a race to keep the 1.5 degree limit alive: By setting clear expectations for the next round of climate action plans and committing to the partnerships and finance to make them possible; By committing to triple renewables and double energy efficiency; And committing to phase out fossil fuels, with a clear time frame aligned to the 1.5-degree limit,” he said.

Renewable energy capacity grew nearly 10% in 2022, led by solar and wind power.

The WMO provisional State of the Global Climate report was published to inform negotiations at COP28 in Dubai. It combines input from National Meteorological and Hydrological Services, regional climate centres, UN partners and leading climate scientists. The temperature figures are a consolidation of six leading international datasets.

The final State of the Global Climate 2023 report, along with regional reports, will be published in the first half of 2024.

Observed concentrations of the three main greenhouse gases – carbon dioxide, methane, and nitrous oxide – reached record high levels in 2022, the latest year for which consolidated global values are available. Real-time data from specific locations show that levels of the three greenhouse gases continued to increase in 2023.

The global mean near-surface temperature in 2023 (to October) was around 1.40 (± 0.12) °C above the 1850–1900 average. Based on the data to October, it is virtually certain that 2023 will be the warmest year in the 174-year observational record, surpassing the previous joint warmest years, 2016 at 1.29 ( ± 0.12) °C above the 1850–1900 average and 2020 at 1.27 (±0.13) °C.

Record monthly global temperatures have been observed for the ocean – from April through to October – and, starting slightly later, the land – from July through to October.

June, July, August, September and October 2023 each surpassed the previous record for the respective month by a wide margin in all datasets used by WMO for the climate report. July is typically the warmest month of the year globally, and thus July 2023 became the all-time warmest month on record.

Global average sea-surface temperatures (SSTs) were at a record observed high for the time of year, starting in the late Northern Hemisphere spring. April through September (the latest month for which we have data) were all at a record warm high, and the records for July, August and September were each broken by a large margin (around 0.21 to 0.27 °C). Exceptional warmth was recorded in the eastern North Atlantic, the Gulf of Mexico and the Caribbean, and large areas of the Southern Ocean, with widespread marine heatwaves.

Ocean heat content reached its highest level in 2022, the latest available full year of data in the 65-year observational record.-

It is expected that warming will continue – a change which is irreversible on centennial to millennial timescales. All data sets agree that ocean warming rates show a particularly strong increase in the past two decades.

In 2023, global mean sea level reached a record high in the satellite record (since 1993), reflecting continued ocean warming as well as the melting of glaciers and ice sheets. The rate of global mean sea level rise in the past ten years (2013–2022) is more than twice the rate of sea level rise in the first decade of the satellite record (1993–2002).

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