TUHO: predatori je zerou a drzej je pohromade.

v dnesni krajine bez predatoru, se silnicema, plotama, etc. nejsi schopnej bez dalsiho managementu delat tu pastvu regenerativne. teoreticky v nejakejch hodne velkejch divokejch rezervacich kde by ty predatori byli to mozny obnovit je.

obvyklej problem pastvy je, ze je malo intenzivni, a zaroven blbe casovana - malo zvirat, velky "plochy" ke kterjm maj v jednu chvili pristup. chces simulovat to stado - rozmrdat jedbo misto, ale jen napr. jeden den a pak jde na dobu potrebnou k regeneraci pryc

TUHO: Jo uz vidim, asi odkazuje na toto :)
"V souvislosti s ochranou klimatu vědci proto varují před zjednodušenými recepty, které požadují výrazné zalesňování, případně redukce stád domácího skotu. Ta v mnoha oblastech nahrazují chybějící divoké velké kopytníky. Cestou je podle odborníků spíše méně intenzivní pastva."

... btw ty predatori jsou dulezity proc? zarucujou to, ze se stada drzej pohromade?

TADEAS: Ted si nejsem jistej, ze nevim kde na to narazej. Klidne to trochu rozvin.
Jinak teda v nasem prostredi se clovek imho hlavne dozvi, ze je premnozena zver, ktera zere lesnikum sazenicky .))

TUHO: jinak oni proste narqzej na to, ze nakonec nevedej jak past, ty projekty nemuzou bejt uspesny pokud tam ty zvirata vypustej v relativne malejch poctech a bez predatoru

TUHO: i lesy evropského mírného pásu byly v přírodním stavu pod silným pastevním tlakem,“

...

Vědci zároveň upozorňují, že velkých kopytníků, i po zahrnutí domácích zvířat, není v krajině příliš, ale naopak i v porovnání s dobami ledovými, velmi málo

...

S decimací velkých býložravců se pojí ještě jedna souvislost – nástup vlády ohně. Absence pastvy vede k akumulaci odumřelé rostlinné biomasy, ideálního paliva pro požáry. Jejich nástup lze poznat z přítomnosti ohořelých uhlíků v půdních profilech,“

Past evidence supports complete loss of Arctic sea ice by 2035
https://phys.org/news/2020-08-evidence-loss-arctic-sea-ice

A new study, published this week in the journal Nature Climate Change, supports predictions that the Arctic could be free of sea ice by 2035.

...

Using the model to look at Arctic sea ice during the last interglacial, the team concludes that the impact of intense springtime sunshine created many melt ponds, which played a crucial role in sea-ice melt. A simulation of the future using the same model indicates that the Arctic may become sea ice-free by 2035.

Joint lead author Dr. Maria Vittoria Guarino, Earth System Modeller at British Antarctic Survey (BAS), says, "High temperatures in the Arctic have puzzled scientists for decades. Unraveling this mystery was technically and scientifically challenging. For the first time, we can begin to see how the Arctic became sea ice-free during the last interglacial. The advances made in climate modeling means that we can create a more accurate simulation of the Earth's past climate, which, in turn gives us greater confidence in model predictions for the future."

The value of seasonal energy storage technologies for the integration of wind and solar power
https://pubs.rsc.org/en/content/articlelanding/2020/ee/d0ee00771d#!divAbstract

This study considers the Western U.S. power system with 24% to 61% of variable renewable power sources on an annual energy basis (up to 83.5% of renewable energy including hydro, geothermal, and biomass power sources). Our results indicate that for the Western U.S. power system, pumped hydro and compressed air energy storage with 1 day of discharge duration are expected to be cost-competitive in the near future. In contrast, hydrogen storage with up to 1 week of discharge duration could be cost-effective in the near future if power and energy capacity capital costs are equal to or less than ∼US$1507 kW−1 and ∼US$1.8 kWh−1 by 2025, respectively. However, based on projected power and energy capacity capital costs for 2050, hydrogen storage with up to 2 weeks of discharge duration is expected to be cost-effective in future power systems. Moreover, storage systems with greater discharge duration could be cost-competitive in the near future if greater renewable penetration levels increase arbitrage or capacity value, significant energy capital cost reductions are achieved, or revenues from additional services and new markets—e.g., reliability and resiliency—are monetized.

SHEFIK: hromadná nehoda převrácený kamion potřebuješ tam jít hasiče sanitku jeřáby to všechno rychle a po ucpané příjezdové cestě to moc nepůjde takže to nejspíš budeš muset vzít bokem atd.

Neříkám že to není řešitelné, ale úplně snadné to nebude.

KEB: jakou techniku/nehodu myslis? aut, nebo tech panelu? ta vyska je prece volitelna. pripadne teleskopicka, nebo odklopna, to bude resitelny jednoduse...

SHEFIK: já nad tím přemýšlel taky, ale vždycky jsem narazil na to, jak chceš řešit nehodu, kam musí dojet technika. Ta demontáž by musela být rychlá jednoduchá bezpečná a levná

Sky News | 2pm | 2 September 2020 | Extinction Rebellion UK
http://www.youtube.com/watch?v=7ZQt8sNeNN8


Channel 4 News | 1 September 2020 | Extinction Rebellion UK
http://www.youtube.com/watch?v=KJJ_m0SBKHI

Sea level rise from ice sheets track worst-case climate change scenario
https://phys.org/news/2020-08-sea-ice-sheets-track-worst-case.amp

Ice sheets in Greenland and Antarctica whose melting rates are rapidly increasing have raised the global sea level by 1.8cm since the 1990s, and are matching the Intergovernmental Panel on Climate Change's worst-case climate warming scenarios.

According to a new study from the University of Leeds and the Danish Meteorological Institute, if these rates continue, the ice sheets are expected to raise sea levels by a further 17cm and expose an additional 16 million people to annual coastal flooding by the end of the century.

Since the ice sheets were first monitored by satellite in the 1990s, melting from Antarctica has pushed global sea levels up by 7.2mm, while Greenland has contributed 10.6mm. And the latest measurements show that the world's oceans are now rising by 4mm each year.

"Although we anticipated the ice sheets would lose increasing amounts of ice in response to the warming of the oceans and atmosphere, the rate at which they are melting has accelerated faster than we could have imagined," said Dr. Tom Slater, lead author of the study and climate researcher at the Centre for Polar Observation and Modelling at the University of Leeds.

"The melting is overtaking the climate models we use to guide us, and we are in danger of being unprepared for the risks posed by sea level rise."

trocha budoucnosti

https://www.powermag.com/global-offshore-wind-capacity-slated-to-multiply-eight-fold-by-2030/

Offshore wind capacity is slated to surge to more than 234 GW by 2030—a remarkable boost when compared to the current 29.1 GW that was installed worldwide at the end of 2019, the Global Wind Energy Council (GWEC) said in an August-released analysis of the sector.

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Offshore wind LCOE, notably, has tumbled in recent years, owing to installations of larger turbines. “When the bigger offshore turbine is released with a higher nameplate capacity, rotor diameter and tower height, the technical capacity factors are higher, which in turn increases the annual energy production (AEP),” the organization explained. “Although larger turbines per unit are more costly than smaller ones, it saves the CAPEX [capital expenditures] for foundations, cables and installation as well as the OPEX [operational expenditures] due to lower [numbers of] turbine units.”

...

The group said that stored electricity can be electrolyzed into hydrogen to be used as feedstock to produce bulk chemicals like methanol or ammonia for industrial processes or combined with captured CO2 to make carbon-neutral liquid fuels such as crude, gasoline, diesel, and aviation fuels. It can also generate heat through heat pumps or electric boilers for houses and factories. Or it can be stored in underground formations like salt domes and fed back to the grid as needed. But while power-to-x has been shown to be technically feasible, the technology is “limited by the scale of projects, making it too expensive to be widely deployed at this stage.” However, the industry is primed to take the next step, “so it’s just a matter of ‘when,’ ” it said.