Annual global mean surface temperature anomalies relative to 1850–1900. Global mean near-surface temperature in 2023 was 1.45 ± 0.12 °C above the 1850–1900 average. The analysis is based on a synthesis of six global temperature datasets. 2023 was the warmest year in the 174-year instrumental record in each of the six datasets. The past nine years – from 2015 to 2023 – were the nine warmest years on record. The two previous warmest years were 2016, with an anomaly of 1.29 ± 0.12 °C, and 2020, with an anomaly of 1.27 ± 0.13 °C. Globally, every month from June to December was record warm for the respective month. September 2023 was particularly noteworthy, surpassing the previous global record for September by a wide margin (0.46 °C–0.54 °C) in all datasets. The second-highest margin by which a September record was broken in the past 60 years (the period covered by all datasets) was substantially smaller, at 0.03 °C–0.17 °C in 1983. July is typically the warmest month of the year globally, and thus July 2023 became the warmest month on record. The long-term increase in global temperature is due to increased concentrations of greenhouse gases in the atmosphere. The shift from La Niña, which lasted from mid-2020 to early 2023, to fully developed El Niño conditions by September 2023 likely explains some of the rise in temperature from 2022 to 2023. However, some areas of unusual warming, such as the North-East Atlantic do not correspond to typical patterns of warming or cooling associated with El Niño. Other factors, which are still being investigated, may also have contributed to the exceptional warming from 2022 to 2023, which is unlikely to be due to internal variability alone. Graphic: WMO

WMO: Climate change indicators reached record levels in 2023 – “Sirens are blaring across all major indicators. Some records aren’t just chart-topping, they’re chart-busting. And changes are speeding-up.”

19 March 2024 (WMO) – A new report from the World Meteorological Organization (WMO) shows that records were once again broken, and in some cases smashed, for greenhouse gas levels, surface temperatures, ocean heat and acidification, sea level rise, Antarctic sea ice cover and glacier retreat. Heatwaves, floods, droughts, wildfires, and rapidly intensifying tropical cyclones […]

Global energy-related CO2 emissions and their annual change, 1900-2023. Total energy-related CO2 emissions increased by 1.1 percent in 2023. Far from falling rapidly – as is required to meet the global climate goals set out in the Paris Agreement – CO2 emissions reached a new record high of 37.4 Gt in 2023. This estimate is based on the IEA’s detailed, cutting-edge region-by-region and fuel-by-fuel analysis of the latest official national energy data, supplemented by data on economic and weather conditions. Graphic: IEA

IEA: CO2 emissions in 2023 reached record high – Weather effects and continued Covid-19 reopening played a significant role in driving emissions in 2023

March 2024 (IEA) – CO2 Emissions in 2023 provides a complete picture of energy-related emissions in 2023. The report finds that clean energy growth has limited the rise in global emissions, with 2023 registering an increase of 1.1 percent. Weather effects and continued Covid-19 reopening played a significant role in driving emissions in 2023. Advanced economies saw […]

Map showing notable economic loss events due to natural and climate disasters in 2023. Global economic losses in 2023 were higher than the 21st century average. Economic losses from global natural disasters in 2023 are estimated at $380 billion, above long-term and short-term averages, after adjusting historical losses to today’s values using the U.S. Consumer Price Index. All continents recorded remarkable natural disaster events in 2023 and multiple countries faced the most significant disasters in their modern histories. The global map shows event and peril patterns that contributed to the overall economic losses in 2023. The largest loss driver was earthquake, yet this was largely caused by a handful of events, notably the earthquake sequence in Turkey and Syria. Severe convective storms came second, with the largest individual losses concentrated in the United States and Europe. Graphic: Aon

Aon: Number of billion-dollar disasters in 2023 highest on record – Severe convective storms were the most damaging peril for insurers

LONDON, 23 January 2024 (Aon) – Aon plc, a leading global professional services firm, today published its 2024 Climate and Catastrophe Insight report, which identifies global natural disaster and climate trends to help make better decisions to manage volatility and enhance global resilience. The report reveals that the 398 global natural disaster events caused a $380 billion (2022: $355 billion) […]

Sean de Guzman, the manager of the California department of water resources snow surveys and water supply forecasting unit, and his team measure snowpack in January 2024. Photo: Andrew Nixon / California department of water resources

California snowpack lowest in decade despite hope with December 2023 storms – “In some places there is literally no measurable snow on the ground at all”

By Gabrielle Canon 4 January 2024 (The Guardian) – In the first snow survey of the season, California came up short – just 25% of the historical average – despite a spate of strong storms that caused flooding and landslides along the coast in late December. On Tuesday, officials measured a depth of just 7.5in at a […]

Aerial view of the Donnie Creek wildfire in northeastern British Columbia in May 2023. The massive blaze ripped across more than 1.44 million acres of land throughout the late spring and summer, making it the largest wildfire on record for the Canadian province. Photo: BC Wildfire Service

Ten “you must be kidding” weather and climate facts of 2023

By Bob Henson and Jeff Masters 26 December 2023 (Yale Climate Connections) – The drumbeat of record weather and climate phenomena — hottest, wettest, fieriest, fiercest, and so on — can sometimes fade into the background, like the repetitive backdrop to a mournful dirge. Then there are those sharp moments, like a cymbal crash, when […]

A church is surrounded by water in a flooded neighborhood in Kherson, Ukraine, following the destruction of the Kakhovka Dam in June 2023. Photo: Evgeniy Maloletka / Associated Press

Water increasingly at the center of conflicts from Ukraine to the Middle East – “It’s very disturbing that in particular attacks on civilian water infrastructure seem to be on the rise”

By Ian James 28 December 2023 (Los Angeles Times) – Six months ago, an explosion ripped apart Kakhovka Dam in Ukraine, unleashing floods that killed 58 people, devastated the landscape along the Dnipro River and cut off water to productive farmland. The destruction of the dam — which Ukrainian officials and the European Parliament blame on Russia, […]

A canoe rests on the bank of a dried-out creek in the Amazon rainforest. Transport by canoe became impossible in some places at the height of the 2023 drought. Photo: Lucas Amorelli / Sea Shepherd

Amazon rainforest experienced worst drought on record in 2023 – “We’ve never seen anything like this”

By Stephanie Hegarty 25 December 2023 (BBC World Service) – The Amazon rainforest experienced its worst drought on record in 2023. Many villages became unreachable by river, wildfires raged, and wildlife died. Some scientists worry events like these are a sign that the world’s biggest forest is fast approaching a point of no return. As […]

Aerial view of two large ships traveling on a drought-stricken Mississippi River. Photo: Philip Gould / Getty

The Mississippi River is losing its fight with the ocean – “This is not a one-off or once-in-100-years thing”

By Nancy Walecki 11 October 2023 (The Atlantic) – The mouth of the Mississippi River is the arena for a kind of wrestling match. In one corner of the ring is the salt water of the Gulf of Mexico, and in the other, the river’s fresh water. The two shove against each other, and usually, […]

Flood waters ripple through an orchard of dead and dying pistachio trees in Tulare Lake. Photo: Robert Gauthier / Los Angeles Times

Heat, drought, floods, bad air: Will California’s Central Valley survive climate change? “It’s almost like the forecast for the middle, late century – we’re seeing it right now”

By Hayley Smith 25 October 2023 (Los Angeles Times) – One March morning in the small Central Valley town of Woodlake, Joshua Diaz was getting out of bed when he noticed that his carpet was bubbling and that his tile floor had grown slick. He tried to open his front door but felt pressure and […]

Aerial view of the Turkana people, nomadic herders in Kenya, near a dried-up watering hole. They were suffering amid a five-year drought in March 2023. Photo: FRANCE 24

Video: Indigenous people and climate change – With Kenya’s Turkana people, when drought kills

By Achraf Abid and James André 20 October 2023 (FRANCE 24) – FRANCE 24 brings you the stories of the people who are on the frontlines of climate change. From Kenya to Panama, via Greenland and Australia, our reporters James André and Achraf Abid went to meet the Indigenous people who live in harmony with […]

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