calodo2003
Flaming Full Member
But it will make the earth warmer & Greenland back to being green. Just think of all the new real estate possibilities.
But it will make the earth warmer & Greenland back to being green. Just think of all the new real estate possibilities.
Abstract
How long will the four seasons be by 2100? Increasing evidence suggests that the length of a single season or in regional scales has changed under global warming, but a hemispherical‐scale response of the four seasons in the past and future remains unknown. We find that summer in the Northern Hemisphere mid‐latitudes has lengthened, whereas winter has shortened, owing to shifts in their onsets and withdrawals, accompanied by shorter spring and autumn. Such changes in lengths and onsets can be mainly attributed to greenhouse‐warming. Even if the current warming rate does not accelerate, changes in seasons will still be exacerbated in the future. Under the business‐as‐usual scenario, summer is projected to last nearly half a year, but winter less than two months by 2100. The changing seasonal clock signifies disturbed agriculture seasons and rhythm of species activities, more frequent heat waves, storms and wildfires, amounting to increased risks to humanity.
Not just CO2, but tremendous amounts of methane as well which is every bit as worrisome in the near-term.
We're going to need a new name for hyper summer. (That season where everything is too hot and too dry for too long.)
They're bloody everywhere around here, and I hate it. Some people actually do benefit from having an SUV because they cannot fold themselves into a sedan for physical reasons; but everybody else is just going with the luxury and fake sense of safety (maybe your own, but not anybody else's, and certainly not small kids on the road), without regard for the environmental impact. It's like all the super shiny pickup trucks driving around over here. I get their use for companies, and I maybe even get it for certain hobbies; but people just driving a truck around town without having any practical use for them are just basically spitting us all in the face. (It used to actually make me angry, but I guess I'm getting used to it...)I actively look down on people who drive SUVs. In traffic it's reversed, obviously.
The planet is heating up way too fast. It’s time for journalism to recognize that the climate emergency is here.
This is a statement of science, not politics. Thousands of scientists—including James Hansen, the NASA scientist who put the problem on the public agenda in 1988, and David King and Hans Schellnhuber, former science advisers to the British and German governments, respectively—have said humanity faces a “climate emergency.”
Why “emergency”? Because words matter. To preserve a livable planet, humanity must take action immediately. Failure to slash the amount of carbon dioxide in the atmosphere will make the extraordinary heat, storms, wildfires and ice melt of 2020 routine and could “render a significant portion of the Earth uninhabitable,” warned the January Scientific American article.
The media’s response to COVID-19 provides a useful model. Guided by science, journalists have described the pandemic as an emergency, chronicled its devasting impacts, called out disinformation and told audiences how to protect themselves (with masks and social distancing, for example).
We need the same commitment to the climate story. As partners in Covering Climate Now, a global consortium of hundreds of news outlets, we will present coverage in the lead-up to Earth Day, April 22, 2021, around the theme “Living Through the Climate Emergency.” We invite journalists everywhere to join us.
They're bloody everywhere around here, and I hate it. Some people actually do benefit from having an SUV because they cannot fold themselves into a sedan for physical reasons; but everybody else is just going with the luxury and fake sense of safety (maybe your own, but not anybody else's, and certainly not small kids on the road), without regard for the environmental impact. It's like all the super shiny pickup trucks driving around over here. I get their use for companies, and I maybe even get it for certain hobbies; but people just driving a truck around town without having any practical use for them are just basically spitting us all in the face. (It used to actually make me angry, but I guess I'm getting used to it...)
Yes, I'm fun at parties.
Ban yachts, ban SUVs, ban flights for business and leisure reasons for distances that can be covered with 5h train connections. Stop subsidization for aviation business, introduce a heavy CO² tax for businesses and individuals and regulate the fossil fuel industry.
Not gonna happen and would result in a lot of whining and neoliberal babbling of "smart green solutions instead of restrictions or regulations, irrational green hippies just wanna ban everything, where is the spirit of innovation".
The fact that Bill Gates has suddenly become a relevant figure on talking Climate Change says it all.
I have been saying for ages that for humans to really take man made climate change seriously, it needs to become personal.
And one way of doing that would be to start to give each family or each adult a Carbon Budget and and the means of monitoring their output.
This initially could be an educational process.
But as it develops, this could ultimately become a process by which we use to restrict the most damaging sources of CO2 and by which we are rewarded for staying below our limits.
I accept that initially, this could be a difficult sell.
But if it is sufficiently creative, it just might be what is needed to focus public attention.
And of course something similar could be done for businesses.
I actively look down on people who drive SUVs. In traffic it's reversed, obviously.
They're bloody everywhere around here, and I hate it. Some people actually do benefit from having an SUV because they cannot fold themselves into a sedan for physical reasons; but everybody else is just going with the luxury and fake sense of safety (maybe your own, but not anybody else's, and certainly not small kids on the road), without regard for the environmental impact. It's like all the super shiny pickup trucks driving around over here. I get their use for companies, and I maybe even get it for certain hobbies; but people just driving a truck around town without having any practical use for them are just basically spitting us all in the face. (It used to actually make me angry, but I guess I'm getting used to it...)
Yes, I'm fun at parties.
Heaps of people have been saying that for ages. For the current world, the trouble is that the rise of the internet bred and rewarded (or rewarded and will now breed) a very specific type of person diametrically opposed to all of that and keenly keyed towards the opposite: siphoning the most energy from as many people as possible while also spending the most energy and being lauded for it. And now we have a generation of kids largely bred to aspire to that 'ideal'.
Legislation always lags behind innovation by around twenty years. AKA when someone invents something world-altering it takes around twenty years to try and understand/legislate for its effects. Been that way for thousands of years. We're right around that time regarding the internet and the energy expenditure distribution dynamic it's enabled.
Same argument is used for gun control here. Unfortunately it is met with the same level of intransigence.Until we try something, we will achieve nothing.
And what have we got to loose.
To be fair, lads, in countries like Canada and Norway (probably Finland, Sweden, Russia and parts of America as well) I wouldn't buy any vehicle that didn't at least have all wheel drive and in some places you even need four wheel drive capability. Yes there are plenty of sedans that offer AWD but if your vehicle doesn't have enough clearance it can still get stuck in deep snow, so the utility is genuine there. Granted, as Chiemoon says a lot of people just go for the luxe or 'me big man with big truck' angle but other considerations like family size and activities may also be a factor. As for pick-ups they are one of the only class of vehicle where you can still get true 4x4 capability (unless you want something stupid like a Jeep).
I've got a 2005 Golf, you really don't need all wheel drive in Norway. I guess for a very, very few it would be required.
But I'm in Canada and Ottawa tends to get quite a lot of snow. We used to go out of town fairly regularly for visits to family and day trips, we have a hybrid Toyota Camry (standard edition) without 4WD, and I see absolutely no reason to get anything else. I know some people with SUVs and trucks, and almost none of them need them for any practical purpose that I'm aware of. I mean, for people that live in cities (including small cities) - what are the chances of actually getting stuck in deep snow? In reality, it's next to zero.Yeah, I'm not super familiar with how you guys are impacted by the gulf stream, etc. I'm sure in the more northern parts of Norway it's a must have. Here in Canada we can get snowed on 5-6 months of the year so it's almost a necessity. Not to mention folks who live in the countryside needing to navigate dirt/gravel roads during the rainy months in the spring and fall.
Yeah, I'm not super familiar with how you guys are impacted by the gulf stream, etc. I'm sure in the more northern parts of Norway it's a must have. Here in Canada we can get snowed on 5-6 months of the year so it's almost a necessity. Not to mention folks who live in the countryside needing to navigate dirt/gravel roads during the rainy months in the spring and fall.
Same argument is used for gun control here. Unfortunately it is met with the same level of intransigence.
But I'm in Canada and Ottawa tends to get quite a lot of snow. We used to go out of town fairly regularly for visits to family and day trips, we have a hybrid Toyota Camry (standard edition) without 4WD, and I see absolutely no reason to get anything else. I know some people with SUVs and trucks, and almost none of them need them for any practical purpose that I'm aware of. I mean, for people that live in cities (including small cities) - what are the chances of actually getting stuck in deep snow? In reality, it's next to zero.
As I said already, some people need trucks for their work and do off-road stuff for fun. And you're right, big families need a minivan (SUV or not). Also, if you live in rural Canada, it's not the same with snow plowing. But in practice, that's a small fraction of the total population, and includes very few people among everyone here in Ottawa who drives around in SUVs and trucks.
I've lived in Northern Norway all my life, admittedly not in the most rural places. Last year it started snowing in October and the last snow wasn't gone before June, but it still wasn't really an issue as far as making it from A to B. The roads are diligently cleared, after all. Further inland it might be different, with worse roads. Or if you live up a particularly icy hill, but that's why we have studded snow tyres.
Snow and ice, yes. It's part of the feedback loop we're going to make happen if we don't cut our emissions fast. Polar snow and ice reflect sunlight, so the less there is of it (due to melting due to climate change), the more sunlight will be absorbed and add to global warming. Edit: not just arctic snow and ice - all of it. There is an enormous surface of it in the Himalayas as well, for example, but melting Glazers aren't helping - while also endangering water supplies for the millions (billions?) of people who depend on that snow and ice for their water supply down the rivers coming out of the Himalayas.I'm a climate change novice so pardon the simple questions. One TV programme I saw about this topic was that the earth was heating up due to polar snow melting, ironically due to the earth heating up, which was causing more snow to melt, etc. Basically, there wasn't enough snow to reflect the sun's rays.
So we need to break this cycle artificially by introducing reflectors in these polar areas, right? I just read Purdue University has come up with the brightest ever white paint which can reflect 98% of the sun's rays rather than the usual 80-90% of other white paints. Are the world's powers on it? Obviously it will cost money but I doubt it will be that much for a reasonable set up. We're not looking to replace the snow, just give it a hand where it's needed most.
Snow and ice, yes. It's part of the feedback loop we're going to make happen if we don't our emissions fast. Polar snow and ice reflect sunlight, so the less there is of it (due to melting due to climate change), the more sunlight will be absorbed and add to global warming.
I imagine this is being looked at, although I had not heard of it before. Painting an enormous natural surface white would not be easy though. I mean, a lot of the ice around the poles is on top of waters, and that's what's melting first. So you can't paint there. And painting land only makes sense on rocky surfaces, as otherwise plants (including grasses and mosses in arctic zones) will cover the paint. And even rocky surfaces - how do you really paint that lastingly?
Or maybe you were kidding. But people are quite serious about geoengineering - or more generally all attempts to stop what's happening that are unrelated to reducing emissions. (Like carbon capture methods.)
Snow and ice, yes. It's part of the feedback loop we're going to make happen if we don't cut our emissions fast. Polar snow and ice reflect sunlight, so the less there is of it (due to melting due to climate change), the more sunlight will be absorbed and add to global warming. Edit: not just arctic snow and ice - all of it. There is an enormous surface of it in the Himalayas as well, for example, but melting Glazers aren't helping - while also endangering water supplies for the millions (billions?) of people who depend on that snow and ice for their water supply down the rivers coming out of the Himalayas.
I imagine this is being looked at, although I had not heard of it before. Painting an enormous natural surface white would not be easy though. I mean, a lot of the ice around the poles is on top of waters, and that's what's melting first. So you can't paint there. And painting land only makes sense on rocky surfaces, as otherwise plants (including grasses and mosses in arctic zones) will cover the paint. And even rocky surfaces - how do you really paint that lastingly?
Or maybe you were kidding. But people are quite serious about geoengineering - or more generally all attempts to stop what's happening that are unrelated to reducing emissions. (Like carbon capture methods.)
In addition to those ideas, what would also help enormously is to use green roofs. Urban areas are heat island, because the ubiquitous asphalt and buildings all absorb heat, making the areas very hot. Using white buildings would help, but so would creating green roofs. They don't even necessarily have to be green with deeper use (e.g., plant stuff that produces food), just covering the roof in a bit of sand with hardy mosses and lichens would already help. That's actually very easy and achievable, and is also great for insects (which people don't like, but without insects, you can forget about pollination, and you won't have all those pretty birds anymore either) - if only people would care to work on this.No I'm serious. Apparently this paint can be used to lower or even replace air conditioners in hot countries due to its ability to not only reflect sunlight but also different ultra violets that produce heat.
You're right snow/ice on water is badly affected, maybe we could spend a few billion making floats painted with this stuff? The paint would need to be ridiculously waterproof obviously. Don't want to be poisoning the water, etc.
A new study is using millions of satellite images to generate a clearer picture than ever before of the fate of the world's Glazers. The annual melt rate from 2015 to 2019 is 71 billion more tonnes a year than it was from 2000 to 2004. Global thinning rates, different than volume of water lost, doubled in the last 20 years. Half the world's glacial loss is coming from the United States and Canada, but almost all the world's Glazers are melting, even ones in Tibet that used to be stable, the study found. Except for a few in Iceland and Scandinavia that are fed by increased precipitation, the melt rates are accelerating around the world.
"Ten years ago, we were saying that the Glazers are the indicator of climate change, but now actually they've become a memorial of the climate crisis," said World Glacier Monitoring Service director Michael Zemp, who wasn't part of the study.
Shrinking Glazers are a problem for millions of people who rely on seasonal glacial melt for daily water and rapid melting can cause deadly outbursts from glacial lakes in places like India. But the largest threat is sea level rise. The world's oceans are already rising because warm water expands and because of melting ice sheets in Greenland and Antarctica, but Glazers are responsible for 21 per cent of sea level rise, more than the ice sheets, the study said. The ice sheets are larger longer term threats for sea level rise.
Glazers distinct from the Greenland and Antarctic ice sheets are shrinking rapidly, altering regional hydrology1, raising global sea level2 and elevating natural hazards3. Yet, owing to the scarcity of constrained mass loss observations, glacier evolution during the satellite era is known only partially, as a geographic and temporal patchwork4,5. Here we reveal the accelerated, albeit contrasting, patterns of glacier mass loss during the early twenty-first century. Using largely untapped satellite archives, we chart surface elevation changes at a high spatiotemporal resolution over all of Earth’s Glazers. We extensively validate our estimates against independent, high-precision measurements and present a globally complete and consistent estimate of glacier mass change. We show that during 2000–2019, Glazers lost a mass of 267 ± 16 gigatonnes per year, equivalent to 21 ± 3 per cent of the observed sea-level rise6. We identify a mass loss acceleration of 48 ± 16 gigatonnes per year per decade, explaining 6 to 19 per cent of the observed acceleration of sea-level rise. Particularly, thinning rates of Glazers outside ice sheet peripheries doubled over the past two decades. Glazers currently lose more mass, and at similar or larger acceleration rates, than the Greenland or Antarctic ice sheets taken separately7,8,9. By uncovering the patterns of mass change in many regions, we find contrasting glacier fluctuations that agree with the decadal variability in precipitation and temperature. These include a North Atlantic anomaly of decelerated mass loss, a strongly accelerated loss from northwestern American Glazers, and the apparent end of the Karakoram anomaly of mass gain10. We anticipate our highly resolved estimates to advance the understanding of drivers that govern the distribution of glacier change, and to extend our capabilities of predicting these changes at all scales. Predictions robustly benchmarked against observations are critically needed to design adaptive policies for the local- and regional-scale management of water resources and cryospheric risks, as well as for the global-scale mitigation of sea-level rise.
Two very interesting articles in the BBC Science section.
1. An area the size of France of natural forest has regenerated since 2000. These are not new planted forests. Rather existing forests which have regrown. And a good part of that is the Brazilian Atlantic Coast forest.
https://www.bbc.co.uk/news/science-environment-57065612
2. There is an article about the development of a new magnet which should soon be used in a trial to make electricity from Nuclear Fusion.
Nuclear Fusion is the process by which our Sun and all the stars use for energy. The massive temperature and pressure at the centre of the Sun force two positively charged Hydrogen Protons together to produce one Helium atom. A tiny amount of mass is lost in the Fusion process. And mass = energy.
There are a number of international efforts taking place to be able to operate a commercial Nuclear Fusion process, with 2030 as a target date.
https://www.bbc.co.uk/news/business-56843149.
We haven't really got anywhere with fusion for decades. The hope for the 2030s is to have finally made a fusion reaction that can sustain itself, but the first actual power plant is slated for the 2050s at the earliest.
Understood. It is hoped that the competition between the different organisations might bring that date forward.
But recreating the right temperature and pressure conditions here on earth is obviously going to be a huge challenge.
It's been "a decade away" for decades now. There's many other important challenges outside the high temperature requirements.
Please carry on. I am interested.
But unlike what happens in solar fusion—which uses ordinary hydrogen—Earth-bound fusion reactors that burn neutron-rich isotopes have byproducts that are anything but harmless: Energetic neutron streams comprise 80 percent of the fusion energy output of deuterium-tritium reactions and 35 percent of deuterium-deuterium reactions.
Now, an energy source consisting of 80 percent energetic neutron streams may be the perfect neutron source, but it’s truly bizarre that it would ever be hailed as the ideal electrical energy source. In fact, these neutron streams lead directly to four regrettable problems with nuclear energy: radiation damage to structures; radioactive waste; the need for biological shielding; and the potential for the production of weapons-grade plutonium 239—thus adding to the threat of nuclear weapons proliferation, not lessening it, as fusion proponents would have it.
In addition, if fusion reactors are indeed feasible—as assumed here—they would share some of the other serious problems that plague fission reactors, including tritium release, daunting coolant demands, and high operating costs. There will also be additional drawbacks that are unique to fusion devices: the use of a fuel (tritium) that is not found in nature and must be replenished by the reactor itself; and unavoidable on-site power drains that drastically reduce the electric power available for sale.
Take a look at this article below, granted it's from 2017, but it's actual at the moment:
https://thebulletin.org/2017/04/fusion-reactors-not-what-theyre-cracked-up-to-be/
A solution to this would be to have aneutronic fusion, like proton-boron, but it requires a lot more temperature and pressure to fuse.
The article below is about the TAE Technologies, who plan on developing proton-boron fusion reactor.
Add to that the severe underfunding and the public fear of anything that contains "nuclear" in it.