cryosphere – Page 4 – Desdemona Despair

The effect of Arctic wildfires on carbon release: Arctic wildfires accelerate the release of organic carbon from the soil into the atmosphere, which can strengthen the feedback to warming. Graphic: V. Altounian / Science

December 23, 2022

Unprecedented Arctic wildfires fuel climate warming cycle – “Larger and more intense wildfires could substantially accelerate the release of permafrost carbon into the atmosphere”

By Kat Kerlin 8 November 2022 (UC Davis) – From Sierra Nevada forests to Arctic peatlands, climate warming is turning some long-held carbon sinks into carbon sources as wildfires increasingly send stored carbon up in smoke. In the Arctic, vast amounts of carbon have been locked beneath frozen soil, much of it in peatlands. Climate warming dries […]

Arctic annual air surface temperatures from October 2021 to September 2022 were the sixth warmest dating back to 1900. The image on the left depicts the departure from the average near-surface temperature across the Arctic during this period, with redder colors showing areas of greater than average warmth. The graphic on the right shows how the rate of Arctic air temperature warming has outpaced the rate of global warming. Data: ERA5 and NASA. Graphic: NOAA / Climate.gov

December 17, 2022

NOAA: Human-caused climate change fuels warmer, wetter, stormier Arctic

13 December 2022 (NOAA) – A typhoon, smoke from wildfires, and increasing rain are not what most imagine when thinking of the Arctic. Yet these are some of the climate-driven events included in NOAA’s 2022 Arctic Report Card, which provides a detailed picture of how warming is reshaping the once reliably frozen, snow-covered region which […]

Hoof prints left by Camargue bulls mark a section of pasture encrusted with salt on the Raynaud ranch in Camargue, southern France, 23 September 2022. As soil salt levels rise due to drought and reduced river flow from the Rhone River, the land traditionally used by bull breeders like the Raynaud family is becoming more and more difficult to maintain as a suitable pace to raise animals. Photo: Daniel Cole / AP Photo

December 10, 2022

In southern France, drought, rising seas threaten traditions – “The sea level rises on our coast and takes more and more of our land”

By Daniel Cole 30 October 2022 SAINTES-MARIE DE LA MER, France (AP) – In a makeshift arena in the French coastal village Aigues-Mortes, young men in dazzling collared shirts come face-to-face with a raging bull. Surrounded by the city’s medieval walls, the men dodge and duck the animal’s charges while spectators let out collective gasps. […]

Landsat images from 21 February 2000 (left) and 27 July 2019 (right) illustrating glacier retreat on top of Mount Kilimanjaro (United Republic of Tanzania). Photo: U.S. Geological Survey

November 19, 2022

Kilimanjaro’s and Africa’s last glaciers to go by 2050, says UN – “What is quite unprecedented in the historical record is how quickly this is happening”

By Patrick Hughes 3 November 2022 (BBC News) – Glaciers across the globe – including the last ones in Africa – will be unavoidably lost by 2050 due to climate change, the UN says in a report [UNESCO finds that some iconic World Heritage glaciers will disappear by 2050 –Des]. Glaciers in a third of […]

Near-surface temperature differences relative to the 1981–2010 average for 2022 to September. The map shows the median anomaly calculated from six data sets: HadCRUT5, ERA5, JRA-55, GISTEMP, NOAAGlobalTemp, and Berkeley Earth. Graphic: WMO

November 7, 2022

State of the Global Climate 2022: Sea level rise accelerates, European glacier melt shatters records, extreme weather causes devastation – “What climate scientists have warned about for decades is upon us”

By Seth Borenstein 6 November 2022 SHARM EL-SHEIKH, Egypt (AP) – Earth’s warming weather and rising seas are getting worse and doing so faster than before, the World Meteorological Organization warned Sunday in a somber note as world leaders started gathering for international climate negotiations. [Eight warmest years on record witness upsurge in climate change impacts –Des] […]

Projected changes in surface temperatures in the Alps, 2021-2050. The Alpine region experiences a higher temperature rise than peri-Alpine areas or at least that the temperature changes start earlier. Large parts of Bavaria, Lombardy and other regions depend on ecosystem services provided by the Alps. Decreasing quantities of water and a reduced reliability of supply will become major issues in the coming decades. This affects not only the drinking water supply but also agriculture, energy production, and industrial cooling demand. Graphic: FAU

October 29, 2022

Water woes loom in the Alps amid climate change – “Reduced quantities of water and limited reliability of water supply will be a major issue in the coming decades”

By Jamey Keaten 27 October 2022 BRIG, Switzerland (AP) – A battle is brewing around Europe’s rooftop over the planet’s most precious resource. The crystal-clear waters issuing from the Alps could become increasingly contested as the effects of climate change and glacier melt become more apparent. Italy wants them for crop irrigation in the spring […]

Predicted (left) and observed (right) sea levels caused by melting of the Greenland Ice Sheet (GrIS). A statistically significant correlation between the two fields (P < 0.001) provides an unambiguous observational detection of the near-field sea level fingerprint of recent GrIS melting in our warming world. Graphic: Coulson, et al., 2022 / Science

October 22, 2022

Discovery of “fingerprint” confirms alarming predictions of Greenland ice sheet melt – “How fast the ice sheets in Greenland and Antarctica will respond to warming is a really big unknown, and frankly a very scary unknown”

By Sarah Sloat 29 September 2022 (NBC News) – Scientists now have unambiguous proof that a phenomenon critical to predicting the impact of climate change exists. Researchers announced Thursday that they had detected the sea level “fingerprint” of the Greenland ice sheet melt, pinpointing the unique pattern of sea level change linked to the melting ice. It’s the […]

Hubei’s Guanyin Pavilion during the July 2017 flood and the August 2022 drought. Photo: Getty Images

October 21, 2022

Climate change has come for the world’s largest greenhouse gas emitter – “There is nothing in world climatic history which is even minimally comparable to what is happening in China”

By Muizz Akhtar 29 September 2022 (Vox) – China just finished one of its most disastrous summers on record, with record-breaking heat, drought, and wildfires leading to water shortages even into the fall. More than 900 million people — or about 64 percent of China’s population — faced brutal heat waves alone, highlighting how much further the nation has to […]

(a) Ocean thermal forcing (shaded areas) at the ocean bottom or 1000 m (whichever is shallower) and annual submarine melt rate (filled squares) at Greenland’s marine-terminating glaciers. The black dotted line shows the 1,000 m isobath and delineates the extent of the continental shelf. The black dashed regions on the ice sheet delineate the hydrological catchments for three large example glaciers: Jakobshavn Isbrae (JI), Helheim (HH) and Kangerdlugssuaq (KG). The five ice sheet regions considered throughout the paper—south (SO), central-west (CW), northwest (NW), northeast (NE) and north (NO)—are delineated by the black ticks. Other labels are the Irminger Sea (Irm), Davis Strait (Dav) and Denmark Strait (Den). Bathymetry is from ref. 42 and ref. 43. (b) Subglacial discharge (x axis, note logarithmic scale) and ocean thermal forcing (y axis) for each marine-terminating glacier. The background shading shows the resulting submarine melt rate. Glaciers are coloured by their regional grouping. The larger squares and error bars show the median and interquartile range for each region, respectively. (c) Submarine melt rate versus grounding line depth by region with fitted linear trends (all significant at the 5% level) as dashed lines. All the results shown in these plots are annually averaged over 1979–2018. Graphic: Slater and Straneo, 2022 / Nature Geoscience

October 21, 2022

Warmer air and warmer water are combining to melt Greenland ice sheet – “This unfortunately adds to the overwhelming body of evidence showing the sensitivity of the Greenland ice sheet to climate change”

By Rachel Koning Beals 17 October 2022 (MarketWatch) – The Greenland ice sheet — one of the two most important glaciers of its kind on Earth — may be even more sensitive to the warming climate than scientists previously thought. The findings, published in the journal Nature Geoscience, shed fresh light on the forces driving ice […]

Percent change in ice volume for Swiss glaciers, 2001-2022. Melt rates in 2022 far exceeded the previous records from the hot summer of 2003. Glaciers in Switzerland lost around 3 cubic kilometres of ice in 2022, more than 6 percent of the remaining volume. By way of comparison, up to now, years with an ice loss of 2 percent have been described as “extreme”. The loss was particularly dramatic for small glaciers. Graphic: M. Huss / Swiss Academy of Sciences

October 21, 2022

2022 heat wave drove unprecedented melt of Swiss glaciers – “2022 was a disastrous year for Swiss glaciers: all ice melt records were smashed by the great dearth of snow in winter and continuous heat waves in summer”

By Jamey Keaten 28 September 2022 GENEVA (AP) – Switzerland’s glaciers are melting like never before, an academic study released Wednesday found, with their ice volume declining by 6% this year amid rising concerns about global warming and a summer heat wave that swept across Europe. The Swiss Academy of Sciences reported that the shrinkage […]