Global warming Definition and 223 Threads

According to this study published in Science magazine, the Earth hasn't been this cold for the past 350-450 million years. The Global Mean Surface Temperature took a dive about 40mya from 27C to the current 11C. It seems like we are in the 'Golden Age' for warm-blooded animals. The graph is in...

Ignoring global warming, the Earth will spin progressively slower. But how will global warming affect this? THEY say, LESS water, LESS slowing. > slowing spin is all about the FRICTION from the action of WATER on the LAND, when the water is gone the slowing of the spin will ceased (or at least...

I have been searching for the answer yet – as I'm here – didn't find it. The current model of climate warming says the lower parts of Earth's atmosphere don't allow the IR radiation to escape freely to the outer space because the GH gas molecules keep absorbing it virtually as soon as it's been...

Hello All : Reading about climate problems , and noticed that there is some deniers or people who do not convinced with the climate problem scientific ideas ( or theories ) may i ask what scientific claims they use to refute the current scientific explanation for the climate problems ? is...

Trying to create a version of mass producible radiative cooling panels At first I want to start off with something able to be created at home relatively cheaply as I dive further in I will start trying to find more durable materials with the same capabilities In order for the system to work the...

https://journals.ametsoc.org/view/journals/bams/89/9/2008bams2370_1.xml?tab_body=pdf I want to add this to the literature base here on physics forums. I'm curious: Are there any reputable papers that say contrary to this one? Or, is it a complete myth the earth goes through heating and...

"Changes in ocean heat content (OHC), salinity, and stratification provide critical indicators for changes in Earth’s energy and water cycles. These cycles have been profoundly altered due to the emission of greenhouse gasses and other anthropogenic substances by human activities, driving...

https://bgr.com/science/mit-scientists-think-theyve-discovered-how-to-fully-reverse-climate-change/

Methane and hydrogen sulfide are supposed to be heavier then air, thus why they remain in low lying areas. I am to believe that only when they begin to disintegrate, they rise into the atmosphere. So my question is, if these gases are already disintegrated, how can they be so formidable?

Usually it is just about the nasty oil, and goodness of electricity. Of the 100 solutions Project Drawdown has listed, some would not even be considered along with the more commonly known by the public at large https://www.drawdown.org/ From cultivation of rice ( number one crop of the world )...

Almost 90% of all humanity lives in the Northern hemisphere. Due to colonization, expansion, growth, war, water sources, etc. we have amassed our populations in specific areas around the Northern hemisphere. We continue to build at an unprecedented rate. Our buildings are growing wider, taller...

I found this link off of a politically charged website (of the persuasion to deny that Global Warming exists), so I am apt to be skeptical. (The website is hosted at the Northern Marianna Islands, making me even more suspicious.)...

As a start for discussion I'd like to make the following bold claim: Both the problems of enough usable energy and global warming can be resolved by implementing Maxwell's demon on a large scale. To justify this bold statement somewhat, I'd like to point to a (relatively) recent...

Climate rewind: Scientists turn carbon dioxide back into coal The article says that this process takes place using a liquid metal catalyst at room temperature and is both efficient and scalable. The rest of the article can be read over at phys.org (link in title). The published paper (open...

A fusion reactors releases a lots of energy. Most of this energy will end up as thermal energy after it has been used by the consumers. Wouldn't this heat up the earth? People use the energy to run cookers, drive cars, light up houses, etc. This energy (99%?) will end up as thermal energy where...

I am a middle school teacher who is very concerned about global warming. My students’ memories don’t go back very far and they think it is perfectly normal to see mild weather and little to no snow throughout the winter months in New York City. I would like to compare current temperatures each...

In a future (100, 500, and 1000 years in the future specifically) where industrial and domestic pollution is totally unregulated, what does the composition of the atmosphere look like? And what do weather systems look like? I know this is an extremely broad question, I'm just looking for a few...

We know that greenhouse gases are the biggest cause of global warming and that the Earth has gotten warmer and warmer over the past few decades. Question: Since not all locales produce greenhouse gases (namely, carbon dioxide) equally, are the effects of global warming distributed more to...

I always had an interest in science. At SUNYA, I took a lot of science, and did modeling for Jay Forrester's Club of Rome Report. My junior thesis was based on that work, and my advisors laughed at it, so I decided that I did not want a degree from SUNYA. My second choice university did not...

This recent Open Access article in PNAS reviews flood risks in NY through 2300 CE. The findings are summarised in the Significance paragraph: We combine downscaled tropical cyclones, storm-surge models, and probabilistic sea-level rise projections to assess flood hazard associated with changing...

Elon Musk says we can terraform Mars by converting its CO2 and H2O into CH4 and O2 using solar power, the latter two compounds being quite useful. Can't we use his idea to reduce the CO2 in our atmosphere and reverse global warming?

In the class our prof said, Sun changes its magnetic poles in every 11 year.And when changes the black spots on the sun increases Is this true ? Also she said Sun's cosmic radiation waves destroyes the upper atmosphere of earth.It was something like this.I don't quite remember.Actually thata...

Concerning Global warming; Can we cool atmosphere by converting it's heat content to electricity? if we do so is it became a perpetual machine in 2nd degree or not? I'm not so good in thermodynamics. But I'm sure it will not violate 1. rule energy is not created from noting, energy converted...

It seems Chip Knappenberger of the Cato Institute, who is considered something of a global warming skeptic, has made an interesting statement. “Natural variability is itself is becoming increasingly ‘non-natural’ as it includes influences which themselves are shaped by anthropogenic...

Hi I have a simple question about global warming. The percentage of carbon dioxide in the Earth atmosphere is about 0.04% . My question is how is such a small percentage of this gas able to have such a powerful affect on global warming? Thanks

I would imagine that most here believe in global warming. My question is what effect does the sun have on global warming because the heat increases as it's fuel is consumed.

1.5 C vs 2 C global warming: New study shows why half a degree matters Global warming is scary. It makes me wonder why people don't take it too seriously. Though I have read somewhere that the energy consumption of the US actually went down by a bit last year so maybe people are taking baby...

Homework Statement Since the 1980's a total of 20 x 10^22 J of additional energy has been absorbed by the worlds oceans. This is 90% of the additional heat our planet is storing as a consequence of global warming. The surface area of the worlds oceans is 361,900,000 km^2 and we will assume this...

It's awesome because I am able to be outside imaging during January. No snow on the ground and not unreasonably cold. This is the first year I've been able to consistently image Orion- here's a full-frame and 100% crop of Orion Nebula, 21m total exposure, 800/5.6 ISO varied from 640-2000, 6s...

I'm so tiredd of hearing Obama and his global warming ilk use the 'seas will rise' because of melting polar ice argument. There are two kinds of ice on the planet, the ice that is free floating such as much of the northern pole area, and ice that is not floating such as Antarctica and glaciers...

Hi, Where can I find a research or statics about the contribution of cellulars or general mobile devices (tablets, PDAs) to the global warming? But I am looking for specifically cellular phones for a project. Thanks a lot!

The wiki article on the greenhouse effect (https://en.wikipedia.org/wiki/Greenhouse_effect) has a top illustration which shows the flow of heat and energy (Watts per meter squared) between outer space, the atmosphere, and Earth's surface. The illustrations shows that of the 519 in the...

Homework Statement Consider the feedback loop involving Clouds, Rainfall and forest area. All the relationships represented in this figure show positive couplings between the components: Forest area is positively coupled to rainfall, plant evapotranspiration is positively coupled to forest...

My first post here. I'm not sure who else to consult. Yesterday in my "Technical Physics" class, my professor went on a rant about climate change. He denied that the Earth is warming at all, but instead cooling due to solar activity. He made a claim that we are actually headed for a cooler...

I read that biodegradable waste in landfills produces methane, a harmful GHG. But didn't biodegradable waste always exist? We throw paper away, but the trees we produce paper from would have died eventually. Our organic waste comes from plants and animals that would have died eventually too. So...

I sort of wandered in from the Science Fiction Forum before anyone could stop me. I have a thought that I simply lack the expertise to make use of, and I thought I would drop it in the laps of people who do have the expertise to make use of it. What would be involved to pull carbon directly...

After much deliberation we have unbanned climate change / global warming threads from the Earth forum. Before you go a start a thread, make sure you read the new rules https://www.physicsforums.com/showthread.php?t=757267

Before posting anything, please review the Physics Forums Global Guidelines. CC/GW threads in this forum are intended for discussion of the scientific content of well-researched models of weather, climatology, and global warming that have been published in peer-reviewed journals and...

I'm just looking for a layman's explanation of why the efforts to confirm Higgs was truly necessary and worth the expense. The counter-argument is that theoretical physics seem to be going along just fine assuming something like the Higgs mechanism existed without validating it. Also, nothing...

Good day :smile: It is well-known fact that the volcanic eruptions cause the global decrease of average temperature. I quickly reviewed the article in wikipedia and several questions arised regarding this issue. There is written in this article (I do not trust Wikipedia very much): 1) So, the...

Hi all, I'm a 1st year physics student in the UK and I'd like to ask if anyone could point me to where I can learn about the in-depth science of global warming/climate change. I don't like having to appeal to authority (even when the authority is legitimate) during debates on global warming and...

Energy Department to Give $226 Million to Support Nuclear Reactor Design http://www.nytimes.com/2013/12/13/business/energy-environment/energy-dept-to-give-226-million-to-new-nuclear-reactor-design.html?_r=1&

Homework Statement On a per-molecule basis, methane is 26 times more effective as an infrared absorber than is CO2. Calculate the corresponding ratio on a per-unit-mass basis, and compare it with the 20-year GWP for methane. What's the reason for any discrepncy you find? (CO2 atmospheric...

In southern Florida, and especially in the Florida Keys, there are some very shallow areas that make it very obvious how low low-tide is. I'm stumped to notice that there seems to be significant variations from year to year. For example, an area we call the flats is normalls under six...

Go here to see the horrible picture: http://www.relevantmagazine.com/slices/asian-giant-hornets-worst-thing-world Apparently these are real. Wiki has an article about them, anyway.

There's been a lot in the news recently about climate change, global warming, and whether or not it is primarily caused by human activity. I know many studies have been done on the issue, but it seems for every study done saying it is man-made, another comes out saying it is not, and vice versa...

Recently, reading an article about graphene, it was disclosed that a sheet of graphene the thickness of a piece of plastic wrap could support the weight of an elephant balanced on a pencil. Beyond the fact that I highly doubt anyone got an elephant (although good at balancing tricks I have seen...

So my question which part of the Em spectrum(sun) is responsible for heating of the atmosphere ? Is it visible or infrared or both ?

I hesitate to post this as it sure sounds like woo but it comes from an Irish University Prof. and appears to be endorsed by the Royal botanic gardens at Kew! Does anyone know of a peer reviewed paper...

I've been annoying myself with this buzzing in my head all summer and posting questions about what major to choose here almost every day! I'm so confused what to do when it comes to my major. I love physics and I'm taking AP Physics B online this year. I watch all these physics shows on TV all...