deglaciation – Desdemona Despair

Glaciologist at ETH Zurich and Head of the Glacier Monitoring in Switzerland (GLAMOS) Matthias Huss check his equipment on the Rhone glacier amid climate change in Obergoms, Switzerland, 27 August 2024. Photo: Denis Balibouse / REUTERS

October 5, 2024

Swiss glacier melt exceeds average in 2024 after hot summer – “This will be a disaster for Swiss glaciers”

By Denis Balibouse and Cecile Mantovani 1 October 2024 ZURICH (Reuters) – Swiss glaciers melted at an above-average rate in 2024 as a blistering hot summer thawed through abundant snowfall, monitoring body GLAMOS said on Tuesday. Earlier this year, glaciologists had celebrated heavy winter and spring snow dumps in the Alps, hoping this would signal […]

Map showing geomorphological data and icefield reconstruction of the Juneau Icefield for the “Little Ice Age” (LIA) maximum. Graphic: Davies, et al., 2024 / Nature Communications

July 5, 2024

Melting of Alaska’s Juneau Icefield accelerates, losing snow nearly 5 times faster than in the 1980s – “When you go there the changes from year-to-year are so dramatic that it just hits you over the head”

By Seth Borenstein 2 July 2024 (AP) – The melting of Alaska’s Juneau icefield, home to more than 1,000 glaciers, is accelerating. The snow covered area is now shrinking 4.6 times faster than it was in the 1980s, according to a new study. Researchers meticulously tracked snow levels in the nearly 1,500-square mile icy expanse going back […]

Satellite view of Antarctica’s Brunt Ice Shelf, showing an Isle of Wight-sized iceberg that broke away in May 2024. Satellite imagery shows clear water all around the berg (outlined in red). It is the third such block to calve near the base in the past three years. Photo: British Antarctic Survey

May 28, 2024

Isle of Wight-size iceberg breaks from Antarctica – “This latest calving reduces the Brunt Ice Shelf to its smallest observed size”

By Jonathan Amos 21 May 2024 (BBC News) – Another big iceberg has broken away from an area of the Antarctic that hosts the UK’s Halley research station. It is the third such block to calve near the base in the past three years. This new one is not quite as large, but still measures […]

Diagrams showing parameters for the collapse of the Atlantic Meridional Overturning Circulation (AMOC). (A) The AMOC strength at 1000 m and 26°N, where the yellow shading indicates observed ranges (60, 61). The cyan-colored lines indicate the magnitude of FH. The red arrow indicates the AMOC tipping point (model year 1758; fig. S1, A and B), and the blue sections indicate the 50-year periods used in (B) to (D). Inset: The hosing experiment where fresh water is added to the ocean surface between 20°N and 50°N in the Atlantic Ocean (+FH) and is compensated over the remaining ocean surface (−FH). The black sections indicate the 26°N and 34°S latitudes over which the AMOC strength and freshwater transport (FovS) are determined, respectively. (B to D) AMOC streamfunction (Ψ) and Atlantic meridional heat transport (MHT; see also fig. S2) for model years 1 to 50, 1701 to 1750, and 2151 to 2200. The contours indicate the isolines of Ψ for different values. Graphic: Van Westen, et al., 2024 / Science Advances

May 27, 2024

Marker for the collapse of key Atlantic current discovered – “We are approaching the tipping point”

By Stephanie Pappas 9 February 2024 (Live Science) – Scientists have discovered a key warning sign before a crucial Atlantic current collapses and plunges the Northern Hemisphere into climate chaos. The Atlantic Meridional Overturning Circulation (AMOC) carries warm water north from the Southern Hemisphere, where it releases heat and freezes. The freezing process concentrates salt […]

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

April 28, 2024

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 […]

Dilshad Bano, 51, sits on the floor near her house which was damaged after a Glacial Lake Outburst Flooding (GLOF) incident, in Hassanabad village, Pakistan, 9 October 2023 Photo: Akhtar Soomro / REUTERS

December 2, 2023

Mountain villages fight for future as melting glaciers threaten floods – “Until 1978, this whole place was a glacier. The pool of water came later.”

By Charlotte Greenfield 22 November 2023 (Reuters) – On the steep slope of a glacier jutting through the Hunza valley in Pakistan’s mountainous far north, Tariq Jamil measures the ice’s movement and snaps photos. Later, he creates a report that includes data from sensors and another camera installed near the Shisper glacier to update his […]

Swiss Federal Institute of Technology glaciologist and head of the Swiss measurement network “Glamos”, Matthias Huss, work at the Rhone glacier with his team near Goms, Switzerland, Friday, 16 June 2023. A top glacier watcher warned that a warm early summer and a heat wave could have caused severe glacier melt across Switzerland, threatening to make 2023 the second-worst year for ice loss after a record thaw in 2022. Photo: Matthias Schrader / AP Photo

September 10, 2023

Swiss glacier watcher warns 2023 heat wave threatens severe melt again after record 2022 – “We can definitely say that we had very high melting in Switzerland and in Europe in general”

By Jamey Keaten 1 September 2023 GENEVA (AP) – A top glacier watcher has warned that a warm early summer combined with a heat wave last week may have caused severe glacier melt in Switzerland, threatening to make 2023 its second-worst year for ice loss after a record thaw last year. Matthias Huss of the GLAMOS […]

The calving front of the Thwaites Glacier in the Amundsen Sea in 2019, viewed from the R/V Nathaniel B. Palmer. Photo: Elizabeth Rush

September 10, 2023

We reached the glacier just as it collapsed – The world’s widest glacier is melting and changing predictions about our planet’s future – “It looks nearly as dramatic as the Larsen B collapse”

By Elizabeth Rush 13 August 2023 (The Atlantic) – Out on the bow of the R/V Nathaniel B. Palmer, the air is dense and almost warm. We have punched through miles of Antarctic ice floes to reach the Amundsen Sea’s foggy interior. I want to honor the remaining distance between us and Thwaites Glacier’s calving […]

Map showing the heat index forecast in the United States on 24 August 2023. 110 million people in the U.S. were exposed to dangerous heat today. Graphic: The Washington Post

August 24, 2023

Heat dome shatters all-time U.S. records as Europe roasts – “Brutal” heat wave brings triple-digit temperatures from Chicago to New Orleans – 110 million people exposed to dangerous heat

By Andrew Freedman 24 August 2023 (Axios) – In a summer featuring countless heat domes and record-high temperatures and heat indices, the season appears to have saved the worst for last. The big picture: A sweltering, stagnant air mass is draped across the Central U.S., resulting in “dangerous,” “searing” and “brutal” heat. Meanwhile, southern Europe is also seeing another bout of […]

The location of climate tipping elements in the cryosphere (blue), biosphere (green) and ocean/atmosphere (orange), and global warming levels their tipping points will likely be triggered at 1.5°C. Researchers see signs of destabilisation already in parts of the West Antarctic and Greenland ice sheets, in permafrost regions, the Amazon rainforest, and potentially the Atlantic overturning circulation as well. Graphic: Earth Commission / Globaïa

August 21, 2023

Climate collapse could happen fast – “For a long time, we were within the range of normal. And now we’re really not. And it has happened fast enough that people have a memory of it happening.”

By Lois Parshley 20 July 2023 (The Atlantic) – Ever since some of the earliest projections of climate change were made back in the 1970s, they have been remarkably accurate at predicting the rate at which global temperatures would rise. For decades, climate change has proceeded at roughly the expected pace, says David Armstrong McKay, a […]