• úvod
  • témata
  • události
  • tržiště
  • diskuze
  • nástěnka
  • přihlásit
    registrace
    ztracené heslo?
    TUHOKlimaticka zmena / Thank you so much for ruining my day
    TUHO
    TUHO --- ---
    No a tady jeste na pozitivni notu nejakej aktualni prispevek od Roberta Walkera.

    Btw NAGASAWA jestli te zajimaji hlasy proti hysterii a ekoalarmisu, tak myslim, ze zrovna tenhle celkem stoji za sledovani. Mam s tim celkovym vyznenim sice celkem problem, ale co jsem si ho tak cetl, tak nema sklon sklouzavat k demagogii, lzim a manipulacim jako treba takovej Bjorn Lomborg. Proste je to takovej rozenej optimista :)) A ma taky gigantickej rozhled, takze jsou ty jeho prispevky zajimavy cist i tak.

    No risk of human extinction - and so much positive going on - Debunking Doomsday - Quora
    https://www.quora.com/q/debunkingdoomsday/No-risk-of-human-extinction-and-so-much-positive-going-on
    TUHO
    TUHO --- ---
    Tady je btw skvelej dokument o rediteli institutu geofyziky na Varsavske univerzite Szymonu Malinowskim. Imho top prikadu, jak byse mela komunikovat klimaticka zmena a hrozba, kterou predstavuje.

    „Można panikować” reż. Jonathan L. Ramsey | "It's Okay to Panic" 2020 (napisy EN, PL, ES, RU)
    http://www.youtube.com/watch?v=osm5vyJjNY4
    TUHO
    TUHO --- ---
    NAGASAWA: tady je kdyztak detailnejsi rozbor schellnbergovejch claimu ze stranek, ktery provozujou klimatologove (zalozili myslim klimatologove michael mann a gavin schmidt jako odpoved na narust dezinformacnich blogu)

    Shellenberger’s op-ad « RealClimate
    http://www.realclimate.org/index.php/archives/2020/07/shellenbergers-op-ad/
    TUHO
    TUHO --- ---
    jeden z problematicnosti jaderny energie jako reseni klimaticke krize a prechodu k nizkouhlikove ekonomice

    Mluvčí jaderného dozoru v reakci na uvedená varování uvedl, že ONR požaduje, aby nové jaderné elektrárny byly schopny odolat přírodním katastrofám. Konkrétně mají být navrženy tak, aby bezpečně přečkaly extrémní jev, který se vyskytne jednou za deset tisíc let. Problém podle akademiků spočívá v tom, že z událostí, které se vyskytovaly velmi zřídka, nebo se dosud nevyskytly vůbec, může globální změna klimatu vytvořit nový fenomén.

    Ve Velké Británii upozorňují experti jaderný dozor na bezpečnostní rizika změny klimatu - Temelín - atomová energetika v reálném světle
    https://temelin.cz/...britanii-upozornuji-experti-jaderny-dozor-na-bezpecnostni-rizika-zmeny-klimatu
    YMLADRIS
    YMLADRIS --- ---
    verite tomu nekdo?

    YMLADRIS
    YMLADRIS --- ---
    YMLADRIS
    YMLADRIS --- ---
    Transformaci české energetiky může urychlit vítr, tvrdí Bloomberg | E15.cz
    https://www.e15.cz/...ychlejsi-transformaci-ceske-energetiky-se-jmenuje-vitr-tvrdi-bloomberg-1371323

    Bez zásadnějších nákladů zrychlit přechod na moderní energetiku a už v roce 2030 vyrábět 28 procent elektřiny z obnovitelných zdrojů. Takové jsou možnosti Česka podle studie Investice do obnovy a přeměny evropských uhelných regionů, kterou zveřejnila výzkumná organizace BloombergNEF

    Peníze na podporu větrné energie máme. Nikdo je ale nechce, tvrdí náměstek pro energetiku Neděla | iROZHLAS - spolehlivé zprávy
    https://www.irozhlas.cz/...o-vyroba-elektriny-obnovitelne-zdroje-bezemisni-energetika_2006301328_vtk

    Peníze na podporu větrné energie máme. Nikdo je ale nechce, tvrdí náměstek pro energetiku Neděla
    Za 20 let by mohly pokrývat větrníky čtvrtinu spotřeby elektřiny v Česku. Tvrdí to studie Ústavu fyziky atmosféry Akademie věd ČR. Máme podmínky pro rozvoj větrných elektráren, abychom jimi mohli nahradit spalování uhlí? Diskutovali o tom hosté pořadu Pro a proti Českého rozhlasu Plus.
    TUHO
    TUHO --- ---
    TUHO
    TUHO --- ---
    TUHO: Time lags for equilibration vary between Earth systems: climate temperatures will catch up with the Pliocene with in a few decades, sea levels within a few centuries. But it gets worse. Because not only have we left the agriculture-sheltering Holocene. Not only have we zoomed through Pliocene the span than 1 human lifetime (reminder: we have no evidence that the large scale agriculture we depend upon, in our billions, for survival, is possible in this new climate. Cheers.). We are still going. We are accelerating, in fact, with concentrations of CO2 increasing faster and faster every year.
    TUHO
    TUHO --- ---
    “_” : this is our unit of time, and it’s 1000 years long.
    _ is 10 long human lifespans, 40 generations, the time separating us from the first millennium and the Middle Ages in European history, when Canute of Denmark ruled Britain, before Marco Polo traveled the Silk Road. It’s a long time by any human account: twice the duration of the Roman Empire.
    _____ is 5'000 years. It’s the age of the oldest known living tree, Methuselah, in the Californian White Mountains.
    ____________ is 12'000 years. It’s the time span separating us from the last ice age. This time is the time during which humans slowly selected plants, developed agriculture, cities, writing: anything we would call civilization. It is the time when humans thrived, cultures multiplied, our population grew. This clement and stable climate interval, which sheltered us and the plants we depend upon to live so well, is known as the Holocene. Gaze upon that interval fondly, for it is already in our past.

    _______________________________________________________________________________________________________ is 103'000 years: the duration of the last Ice Age. Ice Ages, compared with the Holocene, were pretty brutal times for human beings, and the plants and animals we depend upon. Human population was only 1–10 million at the end of the last ice age — and the one before that nearly wiped us out entirely.
    __________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ is 250'000 years, the rough age of Homo Sapiens, our species, us. This is the late stage of the Quaternary period: a time when our planet swung between ice ages and more clement interglacial periods (of which the Holocene was the latest one).
    Now, time starts going much further back.
    But stay with me (keep scrolling!): this is important. This is not just a distant past that our species never knew: it’s also a future we and our children will experience. Because time is moving slowly far back from us, but we are changing our climate with a rapidity never previously experienced on Earth. Ready? 3 million years to travel through now. Off — we — go!

    https://medium.com/@JKSteinberger/cogs-in-the-climate-machine-167cf16750dd
    TUHO
    TUHO --- ---
    As anthropogenic climate change continues the risks to biodiversity will increase over time, with future projections indicating that a potentially catastrophic loss of global biodiversity is on the horizon1,2,3. However, our understanding of when and how abruptly this climate-driven disruption of biodiversity will occur is limited because biodiversity forecasts typically focus on individual snapshots of the future. Here we use annual projections (from 1850 to 2100) of temperature and precipitation across the ranges of more than 30,000 marine and terrestrial species to estimate the timing of their exposure to potentially dangerous climate conditions. We project that future disruption of ecological assemblages as a result of climate change will be abrupt, because within any given ecological assemblage the exposure of most species to climate conditions beyond their realized niche limits occurs almost simultaneously. Under a high-emissions scenario (representative concentration pathway (RCP) 8.5), such abrupt exposure events begin before 2030 in tropical oceans and spread to tropical forests and higher latitudes by 2050. If global warming is kept below 2 °C, less than 2% of assemblages globally are projected to undergo abrupt exposure events of more than 20% of their constituent species; however, the risk accelerates with the magnitude of warming, threatening 15% of assemblages at 4 °C, with similar levels of risk in protected and unprotected areas. These results highlight the impending risk of sudden and severe biodiversity losses from climate change and provide a framework for predicting both when and where these events may occur.

    https://www.nature.com/articles/s41586-020-2189-9
    DRSH
    DRSH --- ---
    Je potřeba myslet pozitivně a jednat, říkají autoři nové inscenace o Gretě Thunbergové | Vltava
    https://vltava.rozhlas.cz/...-myslet-pozitivne-a-jednat-rikaji-autori-nove-inscenace-o-grete-8247360
    DRSH
    DRSH --- ---
    Menší požáry prospívají klimatu, zjistili vědci. Udrží uhlík v rašeliništích | Plus
    https://plus.rozhlas.cz/...ary-prospivaji-klimatu-zjistili-vedci-udrzi-uhlik-v-raselinistich-8247411
    XCHAOS
    XCHAOS --- ---
    https://twitter.com/daliborzz/status/1281866596676501504
    Členská základna Pirátů považuje za prioritní témata pro volby 2021 Klima
    DZODZO
    DZODZO --- ---
    SHEFIK: ale co sa tam bude pestovat? Kazda rastlina ma rada inak kyslu podu https://www.chovatelahospodar.sk/tema/ako-zistit-ph-pody-a-ako-je-mozne-kyslost-pody-upravit
    SHEFIK
    SHEFIK --- ---
    tohle zni slibne. a samotny zvyseni pH pudy muze "usetrit" az 20% pudy

    https://www.nature.com/articles/d41586-020-01965-7

    Achieving targets for mitigating global warming will require the large-scale withdrawal of carbon dioxide from the atmosphere. Writing in Nature, Beerling et al.1 report that enhanced rock weathering in soils has substantial technical and economic potential as a global strategy for removing atmospheric CO2. When crushed basalt or other silicate material is added to soil, it slowly dissolves and reacts with CO2 to form carbonates. These either remain in the soil or move towards the oceans. The authors argue that this method would enable between 0.5 billion and 2 billion tonnes of CO2 to be removed from the atmosphere each year. This rate is similar to that of other land-based approaches2, such as the accrual of organic carbon in soil, carbon capture and sequestration in geological formations, and the addition of biochar (a carbon-rich material) to soil.

    ...

    Increasing soil pH alone would substantially boost crop yields in many regions of the world, because it is possible that low pH constrains crop production on more than 200 million hectares of arable and orchard soils3. This area is equivalent to about 20% of the total extent of these soils (967 million hectares; see go.nature.com/31rcajd). Consequently, on a global scale, acidity is the most important soil constraint for agriculture4. However, there have been no detailed multi-regional analyses of the difference in crop yield between low-pH and optimum-pH soils, and such investigations would benefit the study of synergies between carbon-sequestration methods. The proposed rock additions could conceivably mitigate the low use and supply shortages of agricultural limestone in several regions5. Furthermore, calcium improves root growth in acidic subsurface soil6, with crucial knock-on effects through greater water uptake by plant roots.
    SHEFIK
    SHEFIK --- ---
    A 'regime shift' is happening in the Arctic Ocean -- ScienceDaily
    https://www.sciencedaily.com/releases/2020/07/200709141558.htm

    Scientists find the growth of phytoplankton in the Arctic Ocean has increased 57 percent over just two decades, enhancing its ability to soak up carbon dioxide. While once linked to melting sea ice, the increase is now propelled by rising concentrations of tiny algae.
    SHEFIK
    SHEFIK --- ---
    SHEFIK: porad mi lezi na srdci kde se bude brat voda. to uz asi nebude jama 33x33m...
    SHEFIK
    SHEFIK --- ---
    o dotace a subvence asi v blizky dobe nouze nebude

    EU hydrogen strategy could drive 120 GW of renewables capacity – pv magazine International
    https://www.pv-magazine.com/...07/09/eu-hydrogen-strategy-could-drive-120-gw-of-renewables-capacity/


    The European Commission has outlined a long-anticipated plan it says could unlock up to €340 billion for new solar and wind projects over the next decade. The 30-year strategy envisages up to €470 billion being spent on electrolyzer capacity.

    ...

    In its first four years alone, the strategy envisions the deployment of around 6 GW of new electrolyzer capacity to produce a million tons of green hydrogen. That figure would be ramped up to 40 GW of electrolyzer capacity and ten million tons of hydrogen from 2025-30. From 2030 on, the strategy anticipates green hydrogen would be a mature technology to be used in ‘hard-to-decarbonize’ sectors.

    ...

    Staff at such EU bodies would work with member state national and regional authorities to roll out hydrogen projects and enable knowledge transfer and public-private partnerships. Policymakers would apply the regulation required to establish sufficient certainty to attract private-sector investors and to adapt infrastructure and logistics networks to enable hydrogen consumption.
    YMLADRIS
    YMLADRIS --- ---
    https://www.nature.com/articles/s41467-020-17001-1

    Delayed emergence of a global temperature response after emission mitigation

    A major step towards achieving the goals of the Paris agreement would be a measurable change in the evolution of global warming in response to mitigation of anthropogenic emissions. The inertia and internal variability of the climate system, however, will delay the emergence of a discernible response even to strong, sustained mitigation. Here, we investigate when we could expect a significant change in the evolution of global mean surface temperature after strong mitigation of individual climate forcers.

    https://vtm.zive.cz/...emise-potrva-desitky-let-nez-se-projevi-pozitivni-dopad-na-klima-nasi-planety

    I když snížíme emise, potrvá desítky let, než se projeví pozitivní dopad na klima naší planety
    Karel Kilián
    10. července 2020
    Více na: https://vtm.zive.cz/...se-projevi-pozitivni-dopad-na-klima-nasi-planety/sc-870-a-204828/default.aspx

    Klimatoložka Natalie Mahowald konstatuje, že nelze počítat se změnami v rámci desítek let, ale v tomto pohledu je relevantním měřítkem 100 až 200 let. První výsledky dle jejího mínění neuvidíme dříve než za dvacet nebo třicet let. Dnešní opatření tak ocení především následující generace.

    Jako poměrně realistický se jeví ambiciózní scénář, ve kterém se budou globální emise každý rok snižovat o pět procent. V takovém případě bychom mohli zaznamenat první pozitivní změny za 25 let, tedy někdy kolem roku 2045.


    Kliknutím sem můžete změnit nastavení reklam