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    TUHOKlimaticka zmena / Thank you so much for ruining my day
    SHEFIK
    SHEFIK --- ---
    PER2: fajn, priroda dava vedet kdo ma posledni slovo :) ...jeste par zmen k tomu, treba golfskej proud a uvedomime si, jaky stesti mame, ze zijeme na relativne 'klidny' planete v klidnym obdobi
    TUHO
    TUHO --- ---
    TUHO: (nesouvisi sice se zmenami klimatu, ale snad mi odpustite)

    Over the relatively short span of human history, major innovations, such as the domestication of livestock, adoption of an agricultural lifestyle, and the Industrial Revolution, have increased the human population dramatically and have had radical ecological effects. Today, the biomass of humans (≈0.06 Gt C; SI Appendix, Table S9) and the biomass of livestock (≈0.1 Gt C, dominated by cattle and pigs; SI Appendix, Table S10) far surpass that of wild mammals, which has a mass of ≈0.007 Gt C (SI Appendix, Table S11). This is also true for wild and domesticated birds, for which the biomass of domesticated poultry (≈0.005 Gt C, dominated by chickens) is about threefold higher than that of wild birds (≈0.002 Gt C; SI Appendix, Table S12). In fact, humans and livestock outweigh all vertebrates combined, with the exception of fish. Even though humans and livestock dominate mammalian biomass, they are a small fraction of the ≈2 Gt C of animal biomass, which primarily comprises arthropods (≈1 Gt C; SI Appendix, Tables S13 and S14), followed by fish (≈0.7 Gt C; SI Appendix, Table S15). Comparison of current global biomass with prehuman values (which are very difficult to estimate accurately) demonstrates the impact of humans on the biosphere. Human activity contributed to the Quaternary Megafauna Extinction between ≈50,000 and ≈3,000 y ago, which claimed around half of the large (>40 kg) land mammal species (30). The biomass of wild land mammals before this period of extinction was estimated by Barnosky (30) at ≈0.02 Gt C. The present-day biomass of wild land mammals is approximately sevenfold lower, at ≈0.003 Gt C (SI Appendix, Pre-human Biomass and Chordates and Table S11). Intense whaling and exploitation of other marine mammals have resulted in an approximately fivefold decrease in marine mammal global biomass [from ≈0.02 Gt C to ≈0.004 Gt C (31)]. While the total biomass of wild mammals (both marine and terrestrial) decreased by a factor of ≈6, the total mass of mammals increased approximately fourfold from ≈0.04 Gt C to ≈0.17 Gt C due to the vast increase of the biomass of humanity and its associated livestock. Human activity has also impacted global vertebrate stocks, with a decrease of ≈0.1 Gt C in total fish biomass, an amount similar to the remaining total biomass in fisheries and to the gain in the total mammalian biomass due to livestock husbandry (SI Appendix, Pre-human Biomass). The impact of human civilization on global biomass has not been limited to mammals but has also profoundly reshaped the total quantity of carbon sequestered by plants. A worldwide census of the total number of trees (32), as well as a comparison of actual and potential plant biomass (17), has suggested that the total plant biomass (and, by proxy, the total biomass on Earth) has declined approximately twofold relative to its value before the start of human civilization. The total biomass of crops cultivated by humans is estimated at ≈10 Gt C, which accounts for only ≈2% of the extant total plant biomass (17).
    TUHO
    TUHO --- ---
    Tohle je slusnej ulet. Odhady vahy uhliku ve VESKERY biosfere je cca 550 miliard tun uhliku. Antropogenni cinnost pritom dostava do atmosfery cca 9 miliard tun uhliku rocne. Nemuzu ted najit prehledny kumulativni data , ale dle vseho uz bude v atmosfere uhliku spaleneho lidskou cinnosti v hodnote vahy (nasel jsem akorat odhad do roku 2011, kde to vychazi na 358 miliard tun uhliku od zacatku prumyslove revoluce) temer odpovidajici veskere biomase na zemi...

    A census of the biomass on Earth is key for understanding the structure and dynamics of the biosphere. However, a global, quantitative view of how the biomass of different taxa compare with one another is still lacking. Here, we assemble the overall biomass composition of the biosphere, establishing a census of the ≈550 gigatons of carbon (Gt C) of biomass distributed among all of the kingdoms of life. We find that the kingdoms of life concentrate at different locations on the planet; plants (≈450 Gt C, the dominant kingdom) are primarily terrestrial, whereas animals (≈2 Gt C) are mainly marine, and bacteria (≈70 Gt C) and archaea (≈7 Gt C) are predominantly located in deep subsurface environments. We show that terrestrial biomass is about two orders of magnitude higher than marine biomass and estimate a total of ≈6 Gt C of marine biota, doubling the previous estimated quantity. Our analysis reveals that the global marine biomass pyramid contains more consumers than producers, thus increasing the scope of previous observations on inverse food pyramids. Finally, we highlight that the mass of humans is an order of magnitude higher than that of all wild mammals combined and report the historical impact of humanity on the global biomass of prominent taxa, including mammals, fish, and plants.

    The biomass distribution on Earth | PNAS
    https://www.pnas.org/content/115/25/6506
    TUHO
    TUHO --- ---
    Initialized Earth System predictions are made by starting a numerical prediction model in a state as consistent as possible to observations and running it forward in time for up to 10 years. Skilful predictions at time slices from subseasonal to seasonal (S2S), seasonal to interannual (S2I) and seasonal to decadal (S2D) offer information useful for various stakeholders, ranging from agriculture to water resource management to human and infrastructure safety. In this Review, we examine the processes influencing predictability, and discuss estimates of skill across S2S, S2I and S2D timescales. There are encouraging signs that skilful predictions can be made: on S2S timescales, there has been some skill in predicting the Madden–Julian Oscillation and North Atlantic Oscillation; on S2I, in predicting the El Niño–Southern Oscillation; and on S2D, in predicting ocean and atmosphere variability in the North Atlantic region. However, challenges remain, and future work must prioritize reducing model error, more effectively communicating forecasts to users, and increasing process and mechanistic understanding that could enhance predictive skill and, in turn, confidence. As numerical models progress towards Earth System models, initialized predictions are expanding to include prediction of sea ice, air pollution, and terrestrial and ocean biochemistry that can bring clear benefit to society and various stakeholders.

    Initialized Earth System prediction from subseasonal to decadal timescales | Nature Reviews Earth & Environment
    https://www.nature.com/articles/s43017-021-00155-x
    PER2
    PER2 --- ---
    Snow chaos in Europe caused by melting sea-ice in the Arctic
    https://phys.org/news/2021-04-chaos-europe-sea-ice-arctic.html

    Thawing permafrost cools Arctic currents: This might affect fish stocks
    https://phys.org/news/2021-04-permafrost-cools-arctic-currents-affect.html
    TUHO
    TUHO --- ---
    Ako učiť o klimatickej zmene? Zdroje informácií, metodické príručky a materiály, s ktorými to hravo zvládnete - Lepšia geografia
    https://lepsiageografia.sk/materialy/ako-ucit-o-klimatickej-zmene-zdroje-informacii-metodicke-prirucky-a-materialy-s-ktorymi-to-hravo-zvladnete-
    TUHO
    TUHO --- ---
    Climate scientists, what keeps you up at night? | Environment| All topics from climate change to conservation | DW | 06.04.2021
    https://m.dw.com/en/solutions-climate-change-global-warming-permafrost-locusts-sea-level-extreme-weather-heat/a-57071503
    TUHO
    TUHO --- ---
    Badatelé z Ústavu výzkumu globální změny Akademie věd ČR založili už weby mapující sucho, riziko přírodních požárů i klimatickou změnu v Česku. Nyní přidali do rodiny portálů další, zaměřený na zemědělce. Agrorisk.cz má pomoct předvídat silný vítr, jarní mrazy i výskyt škůdců a další rizika.

    Zemědělcům pomáhá nový web, který spustila Akademie věd. Sleduje rizika, jako počasí nebo škůdce | iROZHLAS - spolehlivé zprávy
    https://www.irozhlas.cz/veda-technologie/veda/agroriskcz-sucho-akademie-ved-zalud_2104130728_pj
    DZODZO
    DZODZO --- ---
    keby sa mi niekto ponukol, ze mi na pozemku vybuduje tunku, tak by som neprotestoval :)

    Jihomoravský kraj vybral osm stovek lokalit v boji proti suchu, problémem jsou majetkové poměry | EnergoZrouti.cz
    https://energozrouti.cz/z/jihomoravsky-kraj-vytipoval-osm-stovek-lokalit-v-boji-proti-suchu-problemem-jsou-majetkove-pomery-pozemku
    TUHO
    TUHO --- ---
    sice trochu starsi publikace, ale stoji za to projit

    Roadmap 2050: A practical Guide to a Prosperous, Low-carbon Europe
    In the architectural profession the issue of sustainability is generally dealt with at the scale of buildings. In an effort to address the issue at a much larger scale, AMO has developed a vision for an EU-wide decarbonized power grid by 2050 as part of Roadmap 2050: A Practical Guide to a Prosperous, Low-Carbon Europe.

    https://cdn.sanity.io/files/5azy6oei/production/cc1316feb866c45f53cab7f44e837e141e4969d7.pdf
    TUHO
    TUHO --- ---
    Changes in atmospheric composition, such as increasing greenhouse gases, cause an initial radiative imbalance to the climate system, quantified as the instantaneous radiative forcing. This fundamental metric has not been directly observed globally and previous estimates have come from models. In part, this is because current space‐based instruments cannot distinguish the instantaneous radiative forcing from the climate’s radiative response. We apply radiative kernels to satellite observations to disentangle these components and find all‐sky instantaneous radiative forcing has increased 0.53 ± 0.11 W/m2 from 2003 to 2018, accounting for positive trends in the total planetary radiative imbalance. This increase has been due to a combination of rising concentrations of well‐mixed greenhouse gases and recent reductions in aerosol emissions. These results highlight distinct fingerprints of anthropogenic activity in Earth’s changing energy budget, which we find observations can detect within 4 years.

    https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2020GL091585
    KEB
    KEB --- ---
    Postavit Žďákovský most ze dřeva? Teoreticky by to šlo, říká autor dřevobetonového mostku Roman Fojtík - Ekolist.cz
    https://ekolist.cz/cz/publicistika/rozhovory/postavit-zdakovsky-most-ze-dreva-teoreticky-by-to-slo-rika-autor-drevobetonoveho-mostku-roman-fojtik

    Akorát nechápu proč když je to tak super tam musí být milion čidel
    THE_DARKNESS
    THE_DARKNESS --- ---
    KEB: město o cca 30 tis. obyvatel, řešíme např. tepelné ostrovy
    KEB
    KEB --- ---
    THE_DARKNESS: Jakého města?
    THE_DARKNESS
    THE_DARKNESS --- ---
    čau, vypadá to, že budu jako zástupce veřejnosti (příp. někdo jiný, koho navrhneme, mě mají už zapsanou jako prudičku, takže mé jméno možná neprojde) v panelu, co bude řešit mitigační a adaptační plán na změny klimatu našeho města. Budu ráda za jakékoli odkazy na literaturu k tomuto tématu. Jsu schopná si něco najít, ale počítám, že tu budete mít nějaké osvědčené zdroje :) kdyžtak pošta, díky
    SHEFIK
    SHEFIK --- ---
    Těžba bitcoinů podle studie ohrožuje splnění klimatických cílů Číny - Ekolist.cz
    https://ekolist.cz/cz/zpravodajstvi/zpravy/tezba-bitcoinu-podle-studie-ohrozuje-splneni-klimatickych-cilu-ciny

    Celosvětově se v současnosti na těžbu bitcoinů ročně spotřebuje 128,84 terrawatthodin (TWh) energie. To je více než činí spotřeba zemí, jako je Ukrajina či Argentina.

    Jestliže podle studie nezasáhne stát, měla by spotřeba elektřiny pro bitcoinový průmysl v Číně dosáhnout vrcholu v roce 2024, kdy bude činit 296,59 TWh. To je více, než činila v roce 2016 celková spotřeba zemí, jako je Itálie a Saúdská Arábie. Tedy zemí, které skončily v žebříčku největších spotřebitelů elektřiny na 12. místě. Tato spotřeba elektřiny odpovídá emisím 130,5 milionu tun uhlíku ročně. To je více, než činila produkce skleníkových plynů v roce 2016 v České republice a Kataru.
    TUHO
    TUHO --- ---
    Bulharsko se navíc v roce 2020 potýkalo s problémem nedostatku vody. „Cokoli, co souvisí se změnou klimatu, bude stále hlubším problémem,“ uvedl novinář Dimiter Kenarov pro Balkan Insight. Dodává přitom, že „vodní krize byla způsobena nejen suchem, ale i špatným hospodařením státu s přírodními zdroji“. Politické strany v Bulharsku tak začaly před volbami mnohem více tematizovat změnu klimatu a environmentální agendu jako takovou. Zájem o environmentální témata souvisí patrně také s příslibem toho, že se Bulharsko stane jedním z hlavních příjemců zelených fondů a fondu pro obnovu v rámci příštího sedmiletého rozpočtu EU.

    Bulharsko: propad krajní pravice a nástup protikorupčních hnutí – A2larm
    https://a2larm.cz/2021/04/bulharsko-propad-krajni-pravice-a-nastup-protikorupcnich-hnuti/
    PER2
    PER2 --- ---
    Abrupt ice age climate changes behaved like cascading dominoes
    https://phys.org/news/2021-04-abrupt-ice-age-climate-cascading.html

    Throughout the last ice age, the climate changed repeatedly and rapidly during so-called Dansgaard-Oeschger events, where Greenland temperatures rose between 5 and 16 degrees Celsius in decades.
    DZODZO
    DZODZO --- ---
    Francouzský parlament chce zakázat krátké vnitrostátní lety nahraditelné vlakem - Novinky.cz
    https://www.novinky.cz/ekonomika/clanek/francouzsky-parlament-chce-zakazat-kratke-vnitrostatni-lety-nahraditelne-vlakem-40356618

    za to urcite moze EU ked to schvalil francuzsky parlament zejo :)))
    TUHO
    TUHO --- ---
    Biden tax plan replaces U.S. fossil fuel subsidies with clean energy incentives | Reuters
    https://www.reuters.com/article/us-usa-treasury-tax-energy-idUSKBN2BU2HL
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