I really want to live someplace milder but watching the earth change #albedo is a wonder.
The raising is dramatic, but cloudy. (Snowstorm)
The lowering though is sunny and dramatic in a subtler way: we are literally scorching the snow off over 2 days. The melt was so fast yesterday that the streets had no puddles. It just burned right into the storm sewer.
Today, the yards have gone from 24” to less than 2” and the coverage from 100% to 80%. I’ll bet by sunset it’ll be less than 10%.
https://www.europesays.com/1868407/ Among the VLEO Technology Stocks and Startups to Watch in 2025 #albedo #america #EarthObservationSatellites #GeospatialIntelligence #LowEarthOrbit #PubliclyTradedCompanies #science #technology #UnitedStates #UnitedStatesOfAmerica #US #USA #VLEOTechnologyStocks
Abnehmende #Albedo
Im Jahr 2023 hatten wir einen ungewöhnlichen Anstieg der #Erderwärmung gesehen und niemand konnte so richtig sagen, woher das so plötzlich gekommen war.
Bis jetzt....
Webseite der Episode: https://resonator-podcast.de/2024/res212-abnehmende-albedo/
Mediendatei: https://resonator-podcast.de/podlove/file/4747/s/feed/c/m4a/RES212_Abnehmende_Albedo.m4a
Overdrawn snow bank.
Once, we thought, Cold threatened Life.
Soon, we'd kill for some.
#Albedo
Podcast zum neuen Paper, das die verrückten Jahre 2023 und 2024 auf abnehmende Albedo zurückführt.
https://resonator-podcast.de/2024/res212-abnehmende-albedo/
Aber warum hat die denn abgenommen?
Einer der Autoren, Helge #Goessling , erklärt es. Sehr interessant.
Und dabei, ungefähr ab Minute 16 geht's los zu Wolken bis zu einer Höhe von 2km in den Tropen und Subtropen.
Mehr Verdunstung durch höhere Temperatur heißt nicht unbedingt mehr Wolken, ua. da wärmere und feuchtere Luft leichter wird und höher schwebt als früher. Und sie sich da ganz oben, über den dicken Kumulus Wolken, mit der trockenen Luft mischen kann, was früher nich ging.
Resultat: Löcher in der Wolkenschicht durch den zunehmenden Anteil trockenerer Luft
Bezieht sich aber wohl nur auf die Tropen-Subtropen, nicht in unseren Breiten.
Und zu Klimamodellen, die ne kleinere Klimasensitivität errechnen, sagt Helge, dass sie den Wolken-Effekt nicht drin haben, weil es zu rechenintensiv ist, einzelne Wolken darzustellen.
45Minuten, die sich lohnen.
Pressemitteilung zum Albedo-Paper https://www.awi.de/ueber-uns/service/presse/presse-detailansicht/sprunghafter-anstieg-der-erderwaermung-ist-massgeblich-auf-geringere-rueckstrahlkraft-des-planeten-zurueckzufuehren.html
Rapid Surge In Global Warming Mainly Due To Reduced Planetary Albedo
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https://phys.org/news/2024-12-rapid-surge-global-due-planetary.html <-- shared technical article
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https://www.science.org/doi/10.1126/science.adq7280 <-- shared paper
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#GIS #spatial #mapping #globe #global #climatechange #warming #remotesensing #PlanetaryAlbedo #Planetary #Albedo #model #modeling #AWI #ECMWF #NASA #weather #energybudget #causation
Declining low altitude cloud cover: Another potential positive feedback loop that could dramatically increase global temperatures in the near future.
https://www.earth.com/news/rapid-surge-in-global-warming-may-have-an-unexpected-source/
Rising sea levels, melting #glaciers, heatwaves at sea – 2023 set a number of alarming new records.
The global mean #temperature also rose to nearly 1.5°C above the preindustrial level, another record.
Seeking to identify the causes of this sudden rise has proven a challenge for researchers.
The potential cause is a decrease in Earth's #albedo due to changes in cloud patterns, corresponding to another positive feedback loop amplifying the warming.
#climate
https://astrobiology.com/2024/12/rapid-surge-in-global-warming-mainly-due-to-reduced-planetary-albedo.html
Rapid surge in #GlobalWarming mainly due to reduced planetary #albedo, researchers suggest
"In addition to the influence of #ElNiño and the expected warming from anthropogenic #GreenhouseGas'es, several other factors have already been discussed that could have contributed to the surprisingly high global mean temperatures since 2023 ..."
But if all these factors are combined, there is still 0.2°C of warming with no readily apparent cause.
https://phys.org/news/2024-12-rapid-surge-global-due-planetary.html
5-Dec-2024
Rapid surge in global #warming mainly due to reduced planetary #albedo
Researchers find a potential explanation for the unusually sudden temperature rise in 2023: reduced low-level cloud cover limits Earth’s ability to reflect solar radiation
https://www.eurekalert.org/news-releases/1066353 #science #ClimateCatastrophe
The world has been warming faster than expected. Scientists now think they know why
Story by Laura Paddison
December 5, 2024
"Last year was the hottest on record, oceans boiled, glaciers melted at alarming rates, and it left scientists scrambling to understand exactly why.
"They know the extraordinary heat was fueled by a number of factors, predominantly planet-heating pollution from burning fossil fuels and the natural climate pattern El Niño. But those alone did not explain the unusually rapid temperature rise.
"Now a new study published Thursday in the journal Science says it has identified the missing part of the puzzle: clouds.
"To be more specific, the rapid surge in warming was supercharged by a dearth of low-lying clouds over the oceans, according to the research — findings which may have alarming implications for future warming.
"In simple terms, fewer bright, low clouds mean the planet 'has darkened,' allowing it to absorb more sunlight, said Helge Goessling, a report author and climate physicist at the Alfred Wegener Institute in Germany.
"This phenomenon is called 'albedo' and refers to the ability of surfaces to reflect the sun’s energy back into space.
"The Earth’s albedo has been declining since the 1970s, according to the report, due in part to the melting of light-colored snow and sea ice, exposing darker land and water which absorb more of the sun’s energy, heating up the planet.
"Low clouds also feed into this effect as they reflect away sunlight.
"The scientists scoured NASA satellite data, weather data and climate models and found the decline in low clouds reduced the planet’s albedo to record lows last year. Areas including parts of the North Atlantic Ocean experienced a particularly significant fall, the study found.
"Last year fits into a decade-long decline of low cloud cover, Goessling told CNN.
"What the study can’t yet explain for certain is why this is happening. 'This is such a complex beast and so hard to disentangle,' Goessling said.
"He believes it is likely the result of a combination of factors. The first is a reduction in shipping pollution due to regulations aimed at reducing the industry’s harmful sulfur emissions. While this has been a win for human health, this type of pollution was also helping cool the planet by brightening clouds."
@AWI-Forschende finden eine mögliche Erklärung für den ungewöhnlich hohen Temperaturanstieg im Jahr 2023: Weniger niedrige Wolken beeinträchtigen die Fähigkeit der Erde, Sonnenstrahlen zu reflektieren - Science-Veröffentlichung: https://www.awi.de/ueber-uns/service/presse/presse-detailansicht/sprunghafter-anstieg-der-erderwaermung-ist-massgeblich-auf-geringere-rueckstrahlkraft-des-planeten-zurueckzufuehren.html #Albedo Klima
Der weltweite Ausbau von #Solaranlagen könnte die #Albedo (Rückstrahlvermögen) der #Erdoberfläche leicht verringern und somit eine geringe zusätzliche #Erwärmung verursachen. Eine neue Studie zeigt jedoch, dass dieser Effekt durch die CO2-Einsparungen der #Solaranlagen innerhalb eines Jahres ausgeglichen werden kann. Besonders effizient ist der Einsatz auf Flächen mit geringem Albedo, wie #Ackerland oder #Wasseroberflächen.
Die durch #Abholzung verursachte Verringerung der #Wolkendecke gleicht die kühlenden Effekte der erhöhten #Oberflächenalbedo teilweise aus. #Wälder beeinflussen das #Klima nicht nur durch ihre #Albedo, sondern auch durch biophysikalische Prozesse wie die Regulierung von Wasser- und Wärmeströmen. Abholzung führt zu weniger #Wolkenbildung, was die #Erwärmung verstärkt, da weniger Feuchtigkeit und Auftrieb vorhanden sind.
#IceSheet- #Albedo #Feedback Estimated From Most Recent Deglaciation
"When climate warms, ice sheets melt, shrink, and reflect less solar radiation back to space, which in turn causes faster warming. #Proxy data over the past 15,000 years shows this feedback takes less than 4000 years. This feedback will continue to propagate current #anthropogenic #globalwarming for thousands of years into the future."
@sciencemagazine
#science #climatechange #sealevel #climatecrisis
17-JUL-2024
#SeaIce's cooling power is waning faster than its area of extent
A shift in #Antarctica's melting trends and slushy #Arctic ice pushes warming from changing sea ice toward the upper limits of #climate model estimates
https://www.eurekalert.org/news-releases/1051728 #science #ClimateCatastrophe #albedo
Does beneficial change in #albedo outweigh impacts of #wateruse and #plasticwaste ? #FredPearce #journalism
https://e360.yale.edu/features/greenhouses-cooling#:~:text=As%20agricultural%20greenhouses%20proliferate%2C%20researchers,damage%20that%20greenhouses%20can%20cause
Greg Cocks 
