Questions tagged [greenhouse-gases]

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Why does the mainstream greenhouse gas theory for global warming ignore the mass of the surface?

The theory says that the energy absorbed by carbon dioxide is returned to the Earth's surface and raises its temperature. But, the surface has mass, earth, soil, rocks, etc., and this needs energy if ...
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3 votes
0 answers
48 views

What is the atmospheric percentage of oxygen produced by trees and phytoplankton every year?

I know that every year carbon sinks remove ~20Gt of CO2 (about half of our emissions), and release a comparable amount of O2 , But I want to know how much O2 the carbon sinks produce annually ...
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4 votes
1 answer
140 views

Does carbon dioxide preferentially accumulate in one layer of the atmosphere?

Just as Ozone concentration peaks at around 20 km in the stratosphere, having a distribution around higher and lowers layers of the atmosphere, does the same happen for carbon dioxide or other ...
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2 votes
2 answers
91 views

How does atmospheric pressure remains constant even though we have released 43 billion tons of $\ce{CO2}$ in one year?

I've heard that the concentration of CO2 has been increased in the air. It should have increased atmospheric pressure, right?
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7 votes
2 answers
83 views

Are wetlands a net source or net sink of GHGs?

Are wetlands a net source or net sink of GHGs? On the one hand, they store a lot of carbon. On the other hand, they emit methane, a potent green house gas.
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3 votes
3 answers
830 views

Why can't we increase cloud coverage of the Earth to reduce mean temperature by flooding basins to increase evaporation?

There are millions of square kilometers of below sea level dry land, mostly in desert areas. Reducing the mean temperature of the earth by 2 °C requires increasing cloud cover of stratus clouds by ...
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1 vote
0 answers
86 views

How serious is the issue of vast quantities of methane release from an ice-free Arctic?

A bunch of climate scientists claim that humans will go extinct by 2026, when humanity crosses the major tipping point known as "Arctic Blue Ocean Event (BOE)". According to the climate ...
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5 votes
1 answer
123 views

How to calculate the back radiation from greenhouse gases?

How would one go about calculating the value for back radiation(324 in this diagram) if it wasn't provided. According to this website, it is "equivalent to 100 percent of the incoming solar ...
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6 votes
1 answer
107 views

Is it true that methane is responsible for nearly one-third of all warming?

BBC says that the latest IPCC report says methane is responsible for 0.3°C out of 1.1°C of all cumulative warming since pre-industrial times. According to the IPCC, around 0.3C of the 1.1C that the ...
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7 votes
1 answer
248 views

What exactly is "Land-Use Change and Forestry"?

What exactly is "Land-Use Change and Forestry" and why is it sometimes hugely positive (Indonesia) but sometimes hugely negative (China)? Isn't it supposed to be a type of source not sink (...
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2 votes
1 answer
148 views

Can a planet be heated by the green house effect to a temperature higher than that created by its incident and net absorbed, peak external radiation?

In that the green house effect, as caused by various atmospheric gases (e.g., H2O, CO2, CH4, etc), acts as an insulating layer which only retards the escape of heat from the planet, it would seem that ...
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3 votes
0 answers
92 views

How to convert CO2 emission from gC/m2/day to Tonnes?

I have an ODIAC Global CO2 emission dataset. The dataset is provided in netCDF (.nc) format and the resolution of the dataset is 1x1 degree. The unit of the dataset is gC/m2/day. I need to convert it ...
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1 vote
1 answer
84 views

How to convert mol m-2 s-1 CO2 emission to Megaton day-1 (MtCO2 per day)?

I am working on the global CO2 emission using a model dataset. The model provides the CO2 emission in mol m-2 s-1. How to convert mol m-2 s-1 CO2 emission to Megaton day-1 (Mt per day)? Regards
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6 votes
4 answers
6k views

Why don't green house gases escape into space?

I have never heard an explanation as to what traps GHGs. What holds them in place? Has research been conducted to assess the efficacy of say triggering a change in their chemical composition into a ...
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5 votes
1 answer
57 views

sulfur hexafluroide as a greenhouse gas and its atmospheric journey

Maybe a simple question, but if sulfur hexafluoride is 6 times heavier than air then how does it get into the high atmosphere. All be it in low quantities now, but there is a large stock of the stuff ...
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2 votes
1 answer
318 views

Relation between Magnitude of Greenhouse Effect and the Concentration of GHGs like $CO_2$

The Average Surface Temperature of the Earth is calculated by the following equation: $$\sigma T_s^4=\frac{(1-A)\Omega}{4}+\Delta E$$ where, $\sigma$= Stefan-Boltzmann Constant $T_s$= Average Surface ...
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4 votes
4 answers
905 views

How hot the earth will be if we have 20% CO2 in the atmosphere instead of ~0.04? and how cold would it be if doesn't have any CO2?

I know Earth once had this amount in the past, but if we got the former atmosphere with around 20% of CO2, how much the temperature will rise? assuming the atmosphere is still dominated by 78% ...
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  • 143
0 votes
1 answer
46 views

Find planetary temperature

I’ve asked this on Worldbuilding, but can anyone find/make me a formula that can be used to predict the mean temperature of a planet, while factoring in greenhouse effect?
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1 vote
1 answer
45 views

What potential geoengineering technologies could help a country "achieve its Paris (agreement) targets"?

CNN's China to expand weather modification program to cover area larger than India ends with the following sentence: "While China has not yet shown signs of 'unilaterally' deploying ...
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1 vote
0 answers
20 views

Would a water rocket be better/worse for greenhouse effect compared to more standard methalox/kerolox cycles?

So there is a company called Arcaspace whose launch vehicle gimmick is that by replacing the first stage boosters, which are generally either solid/cryogenic propellants with water/steam propulsion. ...
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  • 111
3 votes
2 answers
76 views

What part does methane play in the process of producing biogas?

I should point out first that I don't know the first thing about environmental science, I study mathematics, and the reason I am asking this question is because I want to understand the processes ...
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  • 31
2 votes
2 answers
208 views

Why don't dewdrops form on a cloudy night?

The reason behind the non- formation of dewdrops on a cloudy night is the non-attainment of below dew point temperatures. It happens as the outgoing longwave radiation (OLR) is not allowed to escape ...
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1 vote
2 answers
211 views

USA and UK government report on plane emissions: 200% difference... which is right?

The report's respective ratio of 1 passenger car vs one long haul plane are 40% versus 110%: Image 1 (DEFRA): car = 171 plane = 195 (110%) Image 2 (EPA): car = 4096 plane = 1760 (40%) If the ...
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-2 votes
2 answers
368 views

How has the increase in global CO2 been attributed to an anthropogenic cause?

How has the increase in global CO2 been attributed to an anthropogenic cause? It would seem to me that this could be definitively determined on the basis of placing gas spectrometers on the exhausts ...
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  • 296
1 vote
0 answers
26 views

Time it takes for a gas to go to the equator [closed]

The question is the following: In order to understand the sources and sinks of greenhouse gases we need to understand their transport, both vertically and horizontally. It takes _______ time for a ...
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  • 111
1 vote
0 answers
71 views

How can we best objectively quantify climate change mitigation urgency? [closed]

Quantifying climate change mitigation urgency seems to have three aspects: (1) Green House Gas reduction targets required to meet a specific goal such as 2C. The first guesstimate seems to be zero ...
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  • 296
4 votes
1 answer
228 views

Which method is used to calculate tonnes carbon from tonnes CO$_2$ equivalents of GHGs?

It appears that all GHGs are first translated into Carbon Dioxide Equivalents (CDEs) and that calculation is fairly straight forward. Many report in tonnes of Carbon instead of tonnes CDE. I am ...
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1 vote
1 answer
55 views

What is the global warming potential (GWP) of any gas over a 1 day time frame?

Since in 100 years, the global warming potential (GWP) of methane is 28-36, what will be the GWP in 1 day time frame? Can it be calculated that way?
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  • 11
1 vote
4 answers
1k views

Can anyone explain the reason why CO$_2$ increases global temperatures (not the simplistic greenhouse analogy provided for public consumption)?

The greenhouse effect analogy of global warming is that atmospheric carbon dioxide CO$_2$ absorbs some of the infrared radiation emitted by the Earth, and redirects a portion of that radiation back ...
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  • 35
6 votes
2 answers
239 views

Time for water vapor to generate more greenhouse effect than latent heat?

I have an argument with a climate change denier. He says the rise of water vapor in the atmosphere causes a "much larger" cooling effect by taking vaporisation heat from the ground than the ...
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  • 161
1 vote
0 answers
60 views

Ocean Greenhouse Gases Released by Meteorite Impact

A huge amount of $\small\mathsf{CO_2}$ is absorbed by the ocean and stored in the ocean, and methane is stored as clathrates. For every mega-meteorite or asteroid that impacts on land, two hit the sea....
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1 vote
0 answers
52 views

The climate effect of the Russian industrial collapse in the early 90's

In 1982 ExxonMobil made this diagram with a slightly excess of the concentration of atmospheric carbon dioxide and global warming. Can this error be explained by the Russian industrial collapse in the ...
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  • 311
39 votes
7 answers
12k views

CO₂ level is high enough that it reduces cognitive ability. Isn't that a reason to worry?

I think the level of carbon dioxide in the air is high enough to reduce the intelligence of humans. This has nothing to do with climate change. Except that both mean we should reduce CO₂. I never ...
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14 votes
3 answers
7k views

Why is Carbon Dioxide a Greenhouse Gas whereas Ammonia is not?

Why are some gases Greenhouse gases while some are not? I did search this on the net but didn't get any clearcut/credible answers. What exactly is the property that is common among Ozone, Water Vapour,...
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  • 143
1 vote
0 answers
42 views

How does this calculate the water transport between crops in the webside?

click->http://gpe.letsgrow.com/ next click->moisture transport In the results of Moist transport through the crop, what is the relationship between crop height and diffusion, air movement, and total ...
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7 votes
3 answers
557 views

Impacts of high-altitude emission of greenhouse gases (GHG) compared to sea level GHG emissions

I often hear that the emission of greenhouse gases (GHGs) by planes is particularly concerning because the emission of GHGs at high altitudes has an even higher impact on global warming than the ...
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  • 183
5 votes
2 answers
445 views

How does agriculture release so much greenhouse gas?

I recently came over some numbers of GHGs released per energy in food produced, and the result is pretty flooring. I can see how animal-based food production is quite inefficient so let's ignore that ...
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  • 151
0 votes
0 answers
40 views

What is the ratio of energy absorbed by atmospheric CO2 from IR coming from the Earth vs directly from the Sun [duplicate]

I'm trying to understand the atmospheric greenhouse effect. If CO2 absorbs lots of IR radiation emitted from the Earth's surface, does it not also shield the same wavelength radiation that is coming ...
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  • 73
4 votes
2 answers
624 views

Effective Temperature of a Planet and Surface Temperature due to Greenhouse Effect

The effective temperature of the Earth is roughly 12 °F (- 11 °C), which means that in thermal equilibrium when it is emitting as much radiation as it is absorbing, the distribution of wavelengths and ...
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  • 303
3 votes
1 answer
395 views

Which greenhouse gas has the most influence over global warming?

Carbon dioxide is the gas everyone talks about because of how much we emit, but it is the most influential greenhouse gas ? I know there are a lot of other gasses are way more potent to retain heat ...
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  • 131
0 votes
0 answers
42 views

Testing the statistical significance of the difference between cumulative/integrated emission quantities calculated from time series?

I am new to time series data analysis. I wonder how would one test the difference between integrated quantities (area under curve) from different time-series curves? (the time series are plotted with ...
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  • 684
10 votes
1 answer
201 views

About the actual radiative impact of greenhouse gas emission over time

Say we will emit a certain amount of greenhouse gas over the next 50 years (e.g. 100 billion tons CO2-eq in total). What would happen if I implement a certain GHG mitigation effort to cut the same ...
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  • 684
8 votes
2 answers
267 views

Are cattle really contributing to global warming?

Let me be straight up. I'm a physicist, I've no doubt about climate change and the part we play in it. I had been reading about cattle being one of the alleged main causes of climate change. I get ...
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  • 181
4 votes
2 answers
173 views

How CO$_2$ warming effect stays overnight?

Water vapor looses it energy at night (no sun, no UV) and this is deposited as dew. Change of state requires a massive energy change, in general. Is the greenhouse effect of CO$_2$ not lost when it ...
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  • 49
8 votes
3 answers
1k views

Are plastics a carbon sink and how much carbon is released to the atmosphere making them?

If we were to make some technical jump to renewable fuel and renewable energy, would making plastics from oil release green house gasses, how much, and would plastic function as a carbon sink? Sorry ...
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2 votes
1 answer
149 views

Greenhouse gas emissions from wildfires in California

According to the California Air Resources Board, in 2016 (the most recent year for which figures appear to available) California's total greenhouse gas emissions were 430 million metric tons CO2 ...
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  • 408
48 votes
3 answers
16k views

How do 'greenhouse gases' let heat in, but not let it out?

That honestly doesn't make any sense to me. How could heat pass through a gas one way but not the other? Its not like our upper atmostphere has a bunch of doors that can only open one way. To me, that ...
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5 votes
1 answer
54 views

Does the extension of the absorption line of $\text{CO}_2$ with temperature play a role in the climate change?

I've read not long ago that the absorption line of the $\text{CO}_2$ becomes larger with temperature thanks to Doppler effect (if it's false it would be great to tell me). My question is the following:...
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6 votes
2 answers
5k views

Why is ozone a greenhouse gas if it absorb UV radiation?

Ozone is considered a greenhouse gas, even though it absorbs shortwave (UV) radiation from the Sun, which does not fit with the definition for greenhouse gases, where they are supposed to: "absorbs ...
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3 votes
1 answer
831 views

The atmosphere and the dispersion of greenhouse gases

I have been researching everywhere. At what level of the atmosphere do carbon dioxide and other greenhouse gases occur? I can't get a straight answer and am frustrated...
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