Zcela výjimečně do více diskuzí
Podané ruce mezi zemědělstvím a solární energetikou: agrivoltaika | Obnovitelně
https://www.obnovitelne.cz/...1445/podane-ruce-mezi-zemedelstvim-a-solarni-energetikou-agrivoltaika/

A republikani zrejme ztratili senat.

Renewables produce more power than fossil fuels in Germany for first time | Clean Energy Wire
https://www.cleanenergywire.org/news/renewables-produce-more-power-fossil-fuels-germany-first-time

Němci splnili cíl pro rok 2020 - v poslední chvíli díky covidu :D

Uncovering how grasslands changed our climate
https://phys.org/news/2021-01-uncovering-grasslands-climate.html

https://www.nature.com/articles/s41467-020-20406-7#auth-Victoria-Naipal

Grasslands are managed worldwide to support livestock production, while remaining natural or semi-natural ones provide critical services that contribute to the wellbeing of both people and the planet. Human activities are, however, causing grasslands to become a source of greenhouse gas emissions rather than a carbon sink. A new study published in Nature Communications reports how grasslands used by humans have changed our climate in recent centuries.

Grasslands are the most extensive terrestrial biome on Earth and are critically important for animal forage, biodiversity and ecosystem services. They absorb and release carbon dioxide (CO2), and emit methane (CH4) from grazing livestock and nitrous oxide (N2O) from soils, especially when manure or mineral fertilizers are introduced. Little is known, however, about how the fluxes of these three greenhouse gases from managed and natural grasslands worldwide have contributed to climate change in the past, or about the role of managed pastures versus natural or very sparsely grazed grasslands.

To address this knowledge gap, an international research team quantified the changes in carbon storage and greenhouse gas fluxes in natural and managed grasslands between 1750 and 2012. The study's comprehensive estimates of global grasslands' contribution to past climate change illustrate the important climate cooling service provided by sparsely grazed areas, and the growing contribution to warming from quickly increasing livestock numbers and more intensive management, which are associated with more CH4 and N2O emissions in determining the contemporary net climate effect of the grassland biome.

...

from grasslands increased by a factor of 2.5 since 1750 due to increased emissions from livestock that have more than compensated for reduced emissions from the shrinking number of wild grazers. The net carbon sink effect of grasslands worldwide—in other words, the ability of grasslands to absorb more carbon and pack it in the soil—was estimated to have intensified over the last century, but mainly over sparsely grazed and natural grasslands. Conversely, over the last decade, grasslands intensively managed by humans have become a net source of greenhouse gas emissions—in fact, it has greenhouse gas emission levels similar to those of global croplands, which represent a large source of greenhouse gases

...

In the context of low-warming climate targets, the mitigating or amplifying role of grasslands will depend on a number of aspects. This includes future changes in grass-fed livestock numbers; the stability of accumulated soil carbon in grasslands; and whether carbon storage can be further increased over time or if it will saturate, as observed in long-term experiments

Vodík se hlásí o slovo: pomůže čistému rozvoji české energetiky, průmyslu a dopravy
https://www.alies.cz/wp-content/uploads/2020/10/Infolist-Zeleny-Vodik-final.pdf

Tento infolist popsal, jak lze s pomocí skladování, distribuce a konečného použití vodíku během tří desetiletí významně posunout Českou republiku a EU k emisně nenáročným technologiím a učinit evropskou ekonomiku „silnou, konkurenceschopnou a bezuhlíkovou.” Závěrem doplňme, že tahounem evropské a české ekonomiky nemusí být jen na vodíku založený průmysl nebo energetika, ale i vývoj vodíkových technologií samotných. EU podporuje výzkum a inovace v oblasti vodíku již řadu let, což jí dává náskok při vývoji technologií, jako jsou elektrolyzéry, vodíkové čerpací stanice a velké palivové články.

Norway becomes first country where electric cars account for more than 50% of new sales: industry group

https://twitter.com/AFP/status/1346400464011743232?ref_src=twsrc%5Etfw

Vodík: chytrá finta fosilního průmyslu jak podpořit zemní plyn - Radek Kubala
https://denikreferendum.cz/...ek/32145-vodik-chytra-finta-fosilniho-prumyslu-jak-podporit-zemni-plyn

A 10-year plan to save the world's degraded soil | World Economic Forum
https://www.weforum.org/agenda/2020/12/a-10-year-plan-to-save-our-soil

Of the three great bisospheres – soil, ocean, atmosphere – soil is the only one we have a fighting chance of remediating within a couple of decades given current technologies.

The need to fix soil is hardly an original idea. Yet progress on a global scale has been painfully slow, for several reasons:

Farming practices and incentives have prioritised yield optimisation over long-term soil health, and continue to do so.
Our understanding of the soil science has significant gaps.
Improving soil health is resource intensive and comparatively slow, while the complex variety of soils and climates means there is anything but “one size fits all”.

...


First, the work has confirmed three critical determinants of the functioning of any soil system – capacity, efficiency and resilience. Capacity is the ability to translate water and nutrients into outputs such as food. Efficiency relates to energy flows – how much energy is converted to outputs rather than dissipated? Resilience is soil’s ability to store water and nutrients until conditions improve. This is a framework to make sense of the enormous diversity of soil and climate across our planet, while providing much improved qualitative and quantitative understanding of the micro-scale processes involved.

Second, the work has enabled the prototyping of reliable, quick and low-cost measurement of soil health in real-time using networked digital probes. Access to these data in real-time has the potential to rapidly progress a “how to” library of best-practices for soil health across geography and climate, while providing objective measurement and hence the basis for relevant private or public incentives. Thinking has commenced on the protocols which would be needed to underpin this on a global scale.

Third, we now have, for the first time, a mechanistic theory for how carbon moves from the atmosphere to become stored in soil, and the co-benefits that emerge. This, combined with the measurement break-throughs, is a step-change in using soil management practices and incentives to sequester carbon and improve those three critical determinants of the functioning of any soil system – capacity, efficiency and resilience.

V oblasti Beringova moře u Aljašky je pořádně živo. Kombinace studeného arktického vzduchu nad Sibiří a teplého vzduchu nad Pacifikem a extrémně silného tryskového proudění, které obě oblasti odděluje, vedla k vytvoření "výbušné" extratropické bouře s rekordním centrálním tlakem 921 milibarů.
"Byl stanoven nový rekord v tlaku v oblasti severního Pacifiku, Aljašky a Beringova moře – zatím bylo naměřeno 921 mbarů, hodnota možná půjde během dne ještě níže. Systém bičuje Aleutské ostrovy," zveřejnil ve čtvrtek portál Severe Weather Europe.

Zformovala se rekordně silná "výbušná" bouře, může přivát 17metrové vlny - tn.cz
https://tn.nova.cz/clanek/v-beringove-mori-je-poradne-zivo-uderila-rekordni-boure.html

YMLADRIS: tohle uz nekdo poresil, https://uloz.to/hledej?q=wallace+wells

TADEAS:

Paul Maidowski
https://twitter.com/_ppmv/status/1346010379273576448?s=19

Oh, anyone modeled *how* to get emissions to zero but sustain human life in a stock/flow consistent model yet? Humans seem to need a lot of energy, which implies ...and so on, y’all know the drill
...
Get used to recognizing gaslighting *from respected scientists* & IPCC authors. Climate discourses degenerated so much over the past 12 years (since the failure of climate mitigation policy in Copenhagen COP15). Stunning how many play along, this is a civilization scale disaster
..
Why this is important: By creating fantastical ideas of somehow decarbonizing *at global scale* *without showing how, and under which socioeconomic & biophysical constraints,* such science distracts from what we can & must urgently do. Truly unhelpful, because time is short
...
Appeal to use common sense and *never* discuss such insanely complex issues from a hyper narrow monodisciplinary angle. If we can’t do transdisciplinary work, get larger teams across multiple disciplines & change methodologies.
...
After decades of failure in climate policy & science, as societies barely hold together, how much more proof do we need that current narrow science approaches aren’t working. We don’t even critically discuss economic growth, as deep in ecological overshoot as we are? Why?

TADEAS: mann v rockstrom

Q: How does this square with @jrockstrom et al.'s work on tipping points?

A (Mann): This is quantitative and reflects a consensus with the scientific community. The work you speak of is speculative and is qualitative in nature.

Q: Sure, but isn't the concept of tipping points (and tipping point cascades) grounded in science, therefore plausible, and therefore a major *potential* source of weakness of these quantitative results, despite the consensus around them within the scientific community?

A: That is too vague to be scientifically meaningful. Yes, the potential for tipping point like responses has been demonstrated, e.g. w.r.t. ice sheet collapse. There is no evidence for a tipping point like response in global surface temperature to projected carbon emissions.