Questions tagged [co2]

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5
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2answers
87 views

Why are $\small\sf{CH_4}$ and $\small\sf{CO_2}$ levels coupled during the Pleistocene?

CH4 and CO2 levels show correlation throughout the Pleistocene: Source: trustyetverify.wordpress.com What are the reasons of this coupling?
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2answers
187 views

How much heat was released from the 2019-2020 Australian bush fires?

How much heat was released from the 2019-2020 Australian bush fires? And is that likely to have a measurable impact on global atmospheric heat content? Maybe as a secondary question: How much impact ...
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3answers
248 views

Are Ice Ages Affected by the Freezing Out of CO2 in Antarctica?

The freezing point of carbon dioxide is -78.5 $\small\mathsf{^o}$C. Occasionally this low is exceeded in Antarctica, and small quantities of CO2 are frozen out, but are returned soon after to the ...
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126 views

About climate sensitivity of carbon dioxide: today compared with PETM

Due to IPCC the climate sensitivity of CO₂ very likely is 3.0 ± 1.5 ℃ for each doubling of the concentration of atmospheric CO₂. Counting on earlier global warming using the Arrhenius formula [ΔT=λ·...
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2answers
119 views

Trends in atmospheric CO2

I plotted the atmospheric CO2-concentrations to see trends and wondered especially about the phase around 1600 in the plot which I find very interesting. Etienne Godin already told me some facts in ...
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0answers
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CO2 behaviour in atmosphere

I have a doubts about how $\small\mathsf{CO_2}$ absorbs an re-emits infra red (IR) radiation. Let's imagine an only-$\small\mathsf{CO_2}$ atmosphere. In this case, a large amount of 15 $\small\mathsf{...
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1answer
95 views

Reference units for CO2 concentration in the atmosphere and meaning of a slight downward tendancy during the 1600

I discovered here a set of yearly historical atmospherical CO2-concentrations from year 0 - 2014. Since they haven't mentioned which measure they used, I'm not sure whether it is right to talk about ...
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0answers
33 views

Which Farm Crops Are Most Efficient at Reducing Local CO2?

The presence of nearby rainforest is known to measurably deplete the local atmospheric $\small\mathsf{CO_2}$ content, but how much would $\small\mathsf{CO_2}$-hungry crops reduce local $\small\mathsf{...
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0answers
35 views

Natural air-CO2 deviations in the troposphere

I'm working on a room air quality management algorithm, and many sensors seem to respond with $\small\mathsf{CO_2}$ measurements of as little as 200 ppm. Obviously a sensor giving off this value will ...
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1answer
77 views

In the 800 kyr $\ce{CO_2}$ record, how detectable would a short-term peak be?

It is stated in https://cdiac.ess-dive.lbl.gov/trends/co2/ice_core_co2.html that the temporal uncertainty for the glacier $\small\mathsf{CO_2}$ records is less than $\small\mathsf{5~\%}$ at any given ...
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5answers
169 views

Why is smoke considered a factor of global cooling when analyzing nuclear winter scenarios, but arent when analyzing global warming scenarios?

In many articles on the internet (I'll cite a couple for the sake of the question), smoke from the fires (composed mainly of $\small\mathsf{CO_2}$ and CO) following a nuclear war would cool the ...
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1answer
48 views

Will carbon tax be applicable to other emissions? [closed]

Will Carbon tax be applied to other emissions or only carbon emissions like Carbon dioxide & Carbon monoxide ? Can non-warming pollutant emissions like Chaff(Chemtrail) also be taxed under the ...
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0answers
30 views

CO2 reduction by depopulation

Population reduction is not envisaged as a practical (never mind humane) solution to CO2 emission reduction as far as I can tell. I stumbled however on a paper discussing the estimated effects of ...
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0answers
153 views

Cooling effect from the oceans in global warming

The ocean soaks up about 90 percent of the heat of climate change, because of ocean heating. When using the formula of Svante Arrhenius to calculate forcing due to atmospheric $CO_2$ $\Delta F=\alpha\...
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3answers
138 views

Has the present rise of CO2 ppm been proved to be caused by human activity?

The level of CO2 in the atmosphere has risen roughly from 300 to 400ppm over the last 60 years. What are the reliable calculations showing that such a rise has been caused by human activity? I am ...
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35 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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1answer
73 views

Which are the mechanisms of the correlation between atmospheric carbon dioxid and global warming/cooling?

In the end of glacial periods there seems to be an increasing release of carbon dioxide as the global warming increase and at the end of these global warming periods the content of carbon dioxide in ...
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2answers
101 views

CO2 density, is it really a greenhouse gas?

Since there are only 400 ppm in the atmosphere how can a molecule, which doesn't generate heat but absorbs it, possibly have such a great heating effect on the other 999,600 molecules? During the ...
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4answers
146 views

Total CO2 is not constant?

I've got a friend who is a climate change sceptic. He argues that because all the CO2 in fossil fuels originally came from the earth's atmosphere. Then there can't be a problem releasing the CO2 ...
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1answer
2k views

What is the CO2 concentration by altitude and why?

Here is a measurement of CO2 concentration by altitude measured by aircraft:(from Pulsed airborne lidar measurements of atmospheric CO2 column absorption) Is this the usual vertical structure of CO2? ...
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1answer
176 views

What are the ranges of natural (or pre-industrial era) levels of CO2 in the atmosphere in ppm and tons?

Are the levels of natural (before the industrial revolution) levels of CO2 and ppm known? Also as a related question, should the "natural" levels be considered before the industrial revolution or ...
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1answer
237 views

Which percentage of $\text{CO}_2$ emissions are human made emissions?

I was watching a science/myth Youtube channel (science mixed with a lot of speculative/fantasy content) with 2M+ followers and the Youtuber said volcano made emissions were higher than human made ...
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1answer
218 views

If US emissions went to zero how long until global emissions reach current levels

Given the current global CO2 emission trends, if the US overnight magically went to zero emissions (without affecting worldwide emissions), how many years until global CO2 emissions return to exactly ...
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4answers
157 views

What are the technical solutions to measure $\ce{CO2}$ emissions?

I'm currently at COP24 (United Nations Climate Change Conference) in Katowice, Poland. (some editing since I took a screenshot of my laptop) I've asked some guys about $\ce{CO2}$ emissions but very ...
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1answer
142 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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1answer
100 views

Technical term for percentage of CO2 remaining in the atmosphere

I have a theoretical exercise where I calculated the amount of CO2 that is released to the atmosphere per year (4.6 ppm). We assume that the relative increase of CO2 is 2 ppm, hence the percentage of ...
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2answers
513 views

Is volume of air increasing as CO2 levels increase?

CO2 levels are increasing, they have crossed 400 ppm, which means that of every million gas molecules in the air, 400 are of CO2. It has been increasing. Does that mean the total volume of air in the ...
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1answer
56 views

Formula for rising temperatures

I'm looking to extrapolate rising temperatures based on the increasing CO2 levels. From this article: CO2 in 2050, with the following formula used to extrapolate the CO2 levels: $CO_2\ level = 280 \...
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1answer
53 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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How does one analyze this graph on atmospheric C02 data obtained from the Mauna Loa observatory?

Graph I am analyzing: What I am trying to figure out from the graph is: What is the range for CO2 over the record (approximation) What are the major forcings for the overall trend in this record ...
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36 views

How to analyze this data showing atomospheric CO2, CH4 and tempertures obtain from an ice sample?

Here is the chart: My questions are: Is the atmosphere in equilibrium over this record? how would I determine what the maximum and minimum values for each record is (approximation). Is there a ...
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2answers
199 views

How did CO₂ originate on Earth before there was life?

To start life there has to be $\ce{CO2}$. $\ce{Solar energy + 6CO2 + 6H2O -> C6H12O6 (sugars) + 6O2}$ $C_6H_{12}O_{6} + O_2 \longrightarrow H_2O + {CO}_2 + \text{Energy}$ So to start this cycle, ...
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1answer
104 views

Building massive seawall around endangered Islands like Mauritius to save from climate change [closed]

Would it be possible to build a massive seawall, say maybe even made from metal that could rise as the sea level rises to prevent being erased? I am not considering costs here, nor beauty, only if ...
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1answer
159 views

Could earth run out of O2? [closed]

Death in a closed environment due to lack of O2 is actually not that bad: https://www.youtube.com/watch?v=kUfF2MTnqAw And as far as I know as we are cutting down our life saving woods and jungles ...
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2answers
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Is the impact of carbon emision dependent on the location on the earth?

While I was reading how the EU taxes aviation companies based on carbon emissions it occurred to me that the effect of carbon emissions on global temperature etc. may depend on where the carbon is ...
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1answer
146 views

Is the Mauna Loa CO$_\mathsf{2}$ record affected by the nearby mantle plume?

How is it possible that Mauna Loa Observatory is the International Reference Observatory for CO2 Global Measurements if it is placed above the most important earth thermal plume that is heating the ...
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4answers
1k views

Why are CO2 sensors so expensive when CO sensors aren't?

Please excuse me if Earth Science is not the correct place to ask this question. I read a New York Times article about increasing $\small\mathsf{CO_2}$ levels in the atmosphere: "Carbon in Atmosphere ...
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2answers
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CO2 emissions per calorie (food)

I have seen several lists with CO2 emissions by weight for producing several different food products. I think this is an interesting consideration, and possible argument for vegetarianism/veganism. I ...
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2answers
342 views

How large can local surface CO2 concentration vary due to natural processes?

I'd like to have a rough idea of how large local surface CO2 concentration vary due to natural processes. For example, a purely hypothetical experiment: If I set up some CO2 monitors in a wide ...
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4answers
3k views

Carbon dioxide on Mars, Venus and Earth

Earth's atmosphere is 0.038% carbon dioxide. Mars's atmosphere is 95.3% carbon dioxide. Venus's atmosphere is 96.5% carbon dioxide. If Earth's climate is controlled by CO2, then why is Mars so cold ...
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0answers
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Residence time for another planet [closed]

This is a question about residence time for another planet with the following information below: When we arrive on the second habitable planet, we discover that it is also exactly like Earth, except ...
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1answer
460 views

How was it possible that CO2 levels were higher nearly 650,000 years ago?

Recently I've been working on a debate for climate change and I'm working on a rebuttal statement but then I came across many different sites that claimed that there were higher CO2 levels before ...
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4answers
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Does climate change cause increase in co2?

My main question is how do we know that increase in global temperature does not CAUSE an increase in co2 concentration? I am trying to develop my mental model of what's going on for the climate ...
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1answer
150 views

What is the residue after plant matter is completely decomposed?

What typical fraction of decomposing plant matter, left on the surface rather than buried, is not released in gaseous form? My simple world view is that the plant structure has all come from the air, ...
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7answers
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Does organic decay release the same CO2 as burning?

Does a fallen tree left to decay release essentially all of its stored carbon as $\small\mathsf{CO_2}$ to the atmosphere? Or is the carbon uptaken by termites and bacteria, preventing its release to ...
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1answer
256 views

How can every ton of CO2 cost 3 square meters of summer sea ice per year - quantitatively?

The Science article The average U.S. family destroys a football field's worth of Arctic sea ice every 30 years states: Every additional metric ton of carbon dioxide (CO2) puffed into the atmosphere ...
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1answer
797 views

Do rising CO2 levels change the appearance of the sky in infrared?

Atmospheric carbon dioxide levels have been rising, recently passing 400 parts per million. CO2 is a greenhouse gas; it absorbs and emits radiation in the thermal infrared range. It is, as far as I ...
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1answer
119 views

Carbon dioxide and ocean acidification based on temperature

For our assignment, we are required to analyse and compare the $\ce{CO2}$ level (in both ocean and air) of two different sites. Theoretically, shouldn't the $\ce{CO2}$ level of a colder region (e.g., ...
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1answer
4k views

What would the pH of rainwater be if carbon dioxide in the atmosphere doubled?

Natural rain water is slightly acidic (pH = 5.6) since there is carbon dioxide in the atmosphere that dissolves to make carbonic acid. What would be the pH of rainwater if carbon dioxide in the ...
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Locate people by Oxygen/Carbon Dioxide levels [closed]

I've been challenged to think of some really out-of-the-box ways to locate people, and I had one. I'm 90% sure this isn't reasonably possible (probably only in laboratory settings), but I couldn't ...