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    TUHOKlimaticka zmena / Thank you so much for ruining my day
    PALEONTOLOG
    PALEONTOLOG --- ---
    NYRLEM: on zas profesor matematiky nejspíš netuší, že fosilní záznam není funkce, ale průmět sond a lab.výsledků z toho, co se dochovalo a jen z určitý přístupný části toho, co se dalo prozkoumat. nicméně lokalit je hodně, zvlášť z kvartéru, z různých prostředí a konečná data jsou nějakým způsobem očíštěná o extrémy kvůli přípravě na statistický zpracování i kvůli statistickým testům.

    třeba přírůstkový zóny na vápnitejch schránkách umožní pohled i pod horizont měsíců až týdnů, ale z těch zase nevznikne dlouhá časová řada a i tak se stanou obětí statistiky. jako určitě je to vyjáření z článku na Forbesu věcně špatně, protože v interglaciálu Eem, kterej skončil před 125ka bylo v arktický oblasti o +2-4C proti dnešku, na severu finska rostly boreální lesy, v temži žili hroši. ale dnešní oteplení +1-2C se teplotně shoduje s nástupem eemu, zapříčiněným Milankovičovými cykly, ale trochu nám hapruje rychlost toho oteplení a tehdy bylo 280ppm CO2 celou dobu eemu
    NYRLEM
    NYRLEM --- ---
    TADEAS: jsou to neporovnatelna cisla na naprosto rozdilnych skalach ..
    TUHO: pokud bys mel distribucni funkci tak si to muzes "teoreticky" rekonstruovat, ale obavam se, ze k dispozici jsou proxy data s proxy casovou osou a oscilace mezi dvema body si muzes leda vycucat z prstu
    TUHO
    TUHO --- ---
    TADEAS: Tak fakt je, ze pro datasety, ktery jdou nazpatek 100 tisic let asi nebudou k dispozici uplne validni data po dnech (casova skala je hrubsi). Mozna skrze reanalyzu klimatickymi modely. Ale nevim, detailne jsem ty datasety nezkoumal .)
    TADEAS
    TADEAS --- ---
    NYRLEM: myslis srovnavat aktualni globalni teploty s rekonstrukcemi minulych globalnich teplot?
    NYRLEM
    NYRLEM --- ---
    TUHO:
    TADEAS: ano a srovnavat dlouhodobe prumery s okamzitymi hodnotami je kravina, neni liz pravda? :)


    MATT: a?
    MATT
    MATT --- ---
    NYRLEM: taky si dovolím naznačovat citací..

    The largest variations in CR flux arise from the periodic passage of the solar system through the galactic arms. This is reflected in the exposure ages of meteorites, which exhibit a roughly 145 Ma periodicity over the past billion years. And indeed, every one of these high CRF epochs corresponds to a lithologically documented ice-age episode, including the Neoproterozoic Snowball Earth. On shorter time scales, one expects a temperature oscillation to arise because of the solar system's motion perpendicular to the galactic plane. Although the CR flux cannot be directly reconstructed on this shorter time scale, we do see a 32 Ma oscillation in temperature during the past 500 Ma. In the climate model presented here, we propose that these oscillations are possible climate drivers.
    TADEAS
    TADEAS --- ---
    TUHO: + to jsou globalni teploty, ne jedna merici stanice
    TUHO
    TUHO --- ---
    NYRLEM: instrumentalni mereni jsou cca do roku 1750 max. ale pote mas hromady proxy dat statisice i miliony let nazpet
    NYRLEM
    NYRLEM --- ---
    TADEAS: to je preci uplna kravina, za jakou domu ma okamzita mereni? Tady Klementinum ..

    TUHO
    TUHO --- ---
    Trochu obecneji o jadru

    After a tsunami destroyed the cooling system at Japan's Fukushima Nuclear Power Plant, triggering a meltdown, protesters around the world challenged the use of nuclear power. Germany announced it would close its plants by 2022. Although the ills of fossil fuels are better understood than ever, the threat of climate change has never aroused the same visceral dread or swift action. Spencer Weart dissects this paradox, demonstrating that a powerful web of images surrounding nuclear energy holds us captive, allowing fear, rather than facts, to drive our thinking and public policy.Building on his classic, Nuclear Fear, Weart follows nuclear imagery from its origins in the symbolism of medieval alchemy to its appearance in film and fiction. Long before nuclear fission was discovered, fantasies of the destroyed planet, the transforming ray, and the white city of the future took root in the popular imagination. At the turn of the twentieth century when limited facts about radioactivity became known, they produced a blurred picture upon which scientists and the public projected their hopes and fears. These fears were magnified during the Cold War, when mushroom clouds no longer needed to be imagined; they appeared on the evening news. Weart examines nuclear anxiety in sources as diverse as Alain Resnais's film Hiroshima Mon Amour, Cormac McCarthy's novel The Road, and the television show The Simpsons.Recognizing how much we remain in thrall to these setpieces of the imagination, Weart hopes, will help us resist manipulation from both sides of the nuclear debate.


    The Rise of Nuclear Fear - Spencer R. Weart - Google Knihy
    https://books.google.sk/books?id=9KBD-YrGOVkC&redir_esc=y
    PER2
    PER2 --- ---
    konecne poradny pocasicko

    TADEAS
    TADEAS --- ---
    E Jacobson
    https://twitter.com/EliotJacobson/status/1678727804110905344?s=19

    The 7 hottest days on Earth in the last 100,000+ years all happened in the last week:

    July 6 ~ 17.23°C / 63.01°F
    July 7 ~ 17.20°C / 62.96°F
    July 4 ~ 17.18°C / 62.93°F
    July 5 ~ 17.18°C / 62.92°F
    July 8 ~ 17.17°C / 62.90°F
    July 10 ~ 17.12°C / 62.81°F
    July 9 ~ 17.11°C / 62.79°F
    TUHO
    TUHO --- ---
    This article contributes to the study of climate debates online by examining how the IPCC Special Report on Global Warming of 1.5°C (SR15) played out on YouTube following its release in October 2018. We examined features of 40 videos that ranked the highest in YouTube’s search engine over the course of four weeks after the publication of the report. Additionally, this study examines the shifting visibility of the videos, the nature of the channels that published them and the way in which they articulated the issue of climate change. We found that media activity around SR15 was animated by a mix of professional and user-led channels, with the former enjoying higher and more stable visibility in YouTube ranking. We identified four main recurrent themes: disaster and impacts, policy options and solutions, political and ideological struggles around climate change and contested science. The discussion of policy options and solutions was particularly prominent. Critiques of the SR15 report took different forms: as well as denialist videos which downplayed the severity of climate change, there were also several clips which criticized the report for underestimating the extent of warming or overestimating the feasibility of proposed policies.

    “We only have 12 years”: YouTube and the IPCC report on global warming of 1.5ºC | First Monday
    https://firstmonday.org/ojs/index.php/fm/article/view/10112
    PER2
    PER2 --- ---
    tak jaky ekosystem lidi jeste nezkurvili....
    Humans reach a new low. Literally!
    https://youtu.be/t_w1Mj0Hsr4
    SHEFIK
    SHEFIK --- ---
    Narcis jako řešení. Jeho extrakt v krmivu krav redukuje metan, zjistili vědci - iDNES.cz
    https://www.idnes.cz/ekonomika/zahranicni/narcisy-udrzitelny-chov-hospodarskych-zvirat.A230710_135509_eko-zahranicni_rie

    Narcisy by mohly být řešením udržitelnějšího chovu hospodářských zvířat, především pak skotu. Přidáním extraktu z květů těchto rostlin do krmiva se totiž podle vědců obsah metanu v umělých kravských žaludcích snížil o 96 procent. Tým odborníků ze skotské zemědělské univerzity nyní doufá, že u skutečných krav by se produkce metanu mohla snížit o nejméně 30 procent, informoval zpravodajský web Sky News.

    ...

    Odhaduje se, že polovina emisí metanu v Británii pochází od krav a celosvětově produkují hospodářská zvířata přibližně 14 procent světových emisí skleníkových plynů.
    RADIQAL
    RADIQAL --- ---
    A zitra hvezdna debata. Jen nevim jestli GMT nebo CET (5/7pm)

    TADEAS
    TADEAS --- ---
    FlightRadar24
    https://m.facebook.com/story.php?story_fbid=701365238697264&id=100064713814989

    Yesterday was the busiest day for commercial aviation that we’ve ever tracked. We tracked 134,386 commercial flights on 6 July and today is shaping up to be another busy day. More than 20,000 flights are in the air right now.

    FB-IMG-1688909701996
    TADEAS
    TADEAS --- ---
    Heatwave last summer killed 61,000 people in Europe, research finds | Climate crisis | The Guardian
    https://www.theguardian.com/environment/2023/jul/10/heatwave-last-summer-killed-61000-people-in-europe-research-finds
    TADEAS
    TADEAS --- ---
    King Charles meets Joe Biden in Windsor to discuss climate crisis | Joe Biden | The Guardian
    https://www.theguardian.com/us-news/2023/jul/10/king-charles-joe-biden-discuss-climate-crisis

    The visit to Windsor Castle for tea was said to be a reflection of the US president’s appreciation of the seriousness with which King Charles took the climate crisis.

    Along with his climate envoy, John Kerry, and the UK energy secretary, Grant Shapps, Biden met executives and philanthropists for a private discussion on climate finance for the world’s poorest countries.
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