Map of the Horn of Africa showing drought classifications based on Standardised Precipitation Index (SPI; US Drought Monitor, 2023), reflecting the magnitudes of precipitation deficit from Jan 2021-Dec 2022 relative to the 1980-2010 climatology in the CPC dataset (left) and drought classifications based on Standardised Precipitation Evapotranspiration Index (SPEI), reflecting the magnitudes of precipitation deficit from Jan 2021-Dec 2022 relative to the 1980-2010 climatology in the CPC dataset (right). The bold black outline highlights the study region. Graphic: World Weather Attribution

Climate change made East Africa’s drought 100 times more likely, study says – “This vital study shows that climate change is not just something our children need to worry about – it’s already here”

By Raymond Zhong 27 April 2023 (The New York Times) – Two and a half years of meager rain have shriveled crops, killed livestock and brought the Horn of Africa, one of the world’s poorest regions, to famine’s brink. Millions of people have faced food and water shortages. Hundreds of thousands have fled their homes, seeking relief. […]

Global annual mean temperature anomalies with respect to pre-industrial conditions (1850-1900) for six global temperature data sets (1850-2022). Graphic: WMO

WMO annual report highlights continuous advance of climate change – “While greenhouse gas emissions continue to rise and the climate continues to change, populations worldwide continue to be gravely impacted by extreme weather and climate events”

Geneva, 21 April 2023 (WMO) – From mountain peaks to ocean depths, climate change continued its advance in 2022, according to the annual report from the World Meteorological Organization (WMO). Droughts, floods, and heatwaves affected communities on every continent and cost many billions of dollars. Antarctic sea ice fell to its lowest extent on record […]

Rough rice prices from the Chicago Board of Trade, 19 April 2018 - 19 April 2023. Graphic: CNBC

Global rice shortage in 2023 is set to be the biggest in 20 years – “At the global level, the most evident impact of the global rice deficit has been, and still is, decade-high rice prices”

By Lee Ying Shan 18 April 2023 (CNBC) – From China to the U.S. to the European Union, rice production is falling and driving up prices for more than 3.5 billion people across the globe, particularly in Asia-Pacific – which consumes 90% of the world’s rice. The global rice market is set to log its largest […]

Physiological response curves may shift as soil microbiomes respond to drought. In the short term (minutes to days), physiological acclimation may help to sustain function, such as soil carbon decomposition. Over weeks to decades, community shifts and evolution could alter response curves to maintain functioning under dry conditions. Broken lines indicate potential variation in the breadth of the shifted response curves. Graphic: Evans, et al., 2022 / Functional Ecology

Droughts destroying Earth’s biggest carbon sink on land: study – If more carbon-releasing microbes survive than carbon-sequestering microbes, we could end up with carbon-depleted soils

By Mark Waghorn 12 April 2023 (SWNS) – Droughts are destroying Earth’s biggest carbon sink on land, according to new research. Soil stores more greenhouse gas than plants and the atmosphere combined – thanks to the microbes that live in it. Moisture plays a key role in the process. Lack of rainfall is disrupting this […]

Aerial view of homes buried in snow in Soda Springs, California in March 2023. Photo: Josh Edelson / The Washington Post

A wet winter won’t stave off the Colorado River’s water cuts – “There are discussions going on but they’re not making much progress. The level of distrust and animosity is really remarkable.”

By Joshua Partlow 3 April 2023 GRAND JUNCTION, Colorado (The Washington Post) – The abundant snow in the Rocky Mountains this year has been a welcome relief, but is not enough to overcome two decades of drought that has pushed major reservoirs along the Colorado River down to dangerous levels, Camille Calimlim Touton, the commissioner […]

Population histories for all species of California salmon to 2021. On 6 April 2023, the Pacific Fishery Management Council, a quasi-federal body that oversees West Coast fisheries, finalized a decision to recommend closing the salmon season spring of 2024, due to years of drought conditions. Graphic: The Nature Conservancy / casalmon.org

Years of drought force shutdown of salmon fishing season off California

By Dino Grandoni 6 April 2023 (The Washington Post) – Years of drought have taken such a toll on California’s fall run of Chinook salmon that, for the first time in 14 years, fishery managers are canceling next year’s fishing season off the state’s coast to help the population recover. The Pacific Fishery Management Council, […]

(a) Annual snow-zone fire detections subset by snow seasonality in California, 2001–2021. (b) Snow seasonality classifications for California. (c) All fire detections (2001–2021), colored by snow seasonality classification: blue (seasonal), red (ephemeral), and gray (non-snow zone). Fire detections in seasonal (blue) and ephemeral (red) snow zones during (d) 2001–2019 and (e) 2020–2021, noting fires named in the text. Graphic: Hatchett, et al., 2023 / Geophysical Research Letters

California’s snowpack is melting faster than ever before, leaving less available water – “The threats to the state’s water supply are imminent”

By Hayley Smith 14 February 2023 (Los Angeles Times) – For decades, Californians have depended on the reliable appearance of spring and summer snowmelt to provide nearly a third of the state’s supply of water. But as the state gets drier, and as wildfires climb to ever-higher elevations, that precious snow is melting faster and […]

Map showing natural catastrophe loss events in 2022. Natural catastrophes caused overall losses of US$270 billion worldwide. Data: Munich Re, NatCatSERVICE, 2023. Graphic: Munich Re

Munich Re: Climate change and La Niña driving losses – “Climate change is taking an increasing toll. The natural disaster figures for 2022 are dominated by events that, according to the latest research findings, are more intense or are occurring more frequently.”

10 January 2023 (Munich Re) – With overall losses of around US$ 270bn (previous year US$ 320bn) and insured losses of roughly US$ 120bn (previous year US$ 120bn), 2022 joins the recent run of years with high losses. Overall losses were close to the average for the last five years, while insured losses were significantly […]

Map showing significant economic loss events in 2022. Direct economic losses resulting from natural disasters in 2022 are estimated at $313 billion. This is close to the 21st century average, after adjusting actual incurred damage to today’s dollars using the U.S. Consumer Price Index. Though 2022 was far from record-breaking in terms of overall losses, it saw many impactful and costly events across the globe. Visualizing the geographic distribution of 2022 events allows for distinguishing certain patterns, including higher frequency of medium-sized Severe Convective Storm (SCS) events in the U.S. and Europe, and the prevalence of flooding events in Africa, Southeast Asia and Oceania. The map primarily shows the economic impact, which to some extent correlates with concentration of wealth — this is not a result of a reporting bias. What this map does not highlight is the humanitarian crises and displaced communities, as many events with significant human impacts do not necessarily translate into a high financial toll in terms of direct damage. Note that significant price inflation throughout the year already resulted in notable increases of per-event losses. Graphic: Aon

Aon: Global insured losses from natural disasters exceeded $130 billion In 2022, driven by second-costliest event on record – More than 19,000 heat-related deaths in Europe

CHICAGO, 25 January 2023 (PRNewswire) – Aon plc (NYSE: AON), a leading global professional services firm, today published its 2023 Weather, 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 natural disasters caused a $313 billion global economic loss […]

John Hornewer sets alarms on his phone in two-minute intervals, after which he puts a quarter in the fill station, as he fills up his 6,000-gallon tanker to haul water from Apache Junction to Rio Verde Foothills. Photo: Caitlin O'Hara / The Washington Post

Arizona city cuts off a neighborhood’s water supply amid drought – “There is no Santa Claus. The megadrought tells us all: water is not a compassion game.”

By Joshua Partlow 16 January 2023 SCOTTSDALE, Arizona (The Washington Post) – The survival — or at least the basic sustenance — of hundreds in a desert community amid the horse ranches and golf courses outside Phoenix now rests on a 54-year-old man with a plastic bucket of quarters. John Hornewer picked up a quarter […]

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