Questions tagged [climate-change]

Questions about changes of the climate system, including questions about global warming.

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3
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2answers
88 views

What on Earth are we doing and can be done to prevent the projected (massive) water shortages?

I have heard it from many, many places that the big cities are drawing too much water from their aquifers, and then climate change will exacerbate that problem amongst a very many others. My city, ...
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0answers
20 views

Are their any tools or code available to evaluate cmip6 models (r or matlab preferred)?

I would like to carry out a superficial analysis of a small number of CMIP6 models I downloaded from the ESGF. I'm thinking that a spatial correlation or Mean Square error between climatologies of ...
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0answers
44 views

Could climate change make air unbreathable? [duplicate]

A lot of the press discussion, IPCC information and scientific inquiry about climate change refers to changes in the temperature of the atmosphere. I have not seen debates about changes in the ...
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0answers
49 views

Is Russia going to benefit from climate change? [closed]

There are clear ways climate change can and does harm Russia: more frequent forest fires, floods, thawing permafrost. On the other hand, winter, says the latest IPCC report, is going to warm at a ...
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0answers
43 views

Alternative natural explanations for rise in atmospheric CO2? [duplicate]

I am in no way a climate-change skeptic, nor a denier. Motivated by this question and some articles I read online: Are there any known natural processes beside human activities that are able to ...
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2answers
195 views

How to explain the remarkable regularity of the increased concentration of atmospheric carbon dioxide?

The Keeling curve is very well approximated with an exponential function with an offset $256$ [ppm] $$256+A\cdot e^{\alpha\cdot t}$$ where $A=1.095\cdot10^{-12}$ and $\alpha=0.0161$ ($t$ is in years ...
3
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0answers
38 views

Why is draining wetlands not a good idea, climate-wise?

Suppose we say, "We have a climate emergency going on, there's no way we're going to decarbonize our economies fast enough, to hell with biodiversity, we are going to drain the swamps". What ...
4
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1answer
185 views

What is the difference between top-down and bottom-up estimates?

I find the IPCC report hard to read. It's peppered with unexplained terms and is generally cumbersome (no offence to its authors). Here's one example. What is the difference between top-down and ...
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1answer
62 views

How are they holding COP26 if the IPCC hasn't yet finished the report?

How are they holding COP26 if the IPCC hasn't yet completed its latest Assessment Report? I'm reading it at the moment, and more often than not there are descriptions to figures without the figures ...
2
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1answer
90 views

1.5° above what?

We know all about how the Earth's temperature needs to stay below "1.5° above pre-industrial levels". But what were they? Every news article and policy statement seems to hand-wave it away. ...
4
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1answer
54 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 ...
2
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1answer
426 views

Looking for the mathematics so I can run climate change simulations

Sorry for the stupid question, but I have been unable to answer it even after wasting time googleing for a while... I know there are several climate-changes scenarios, and I know the several climatic ...
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4answers
113 views

Why does the Arctic warm so fast despite being so white?

It may be a silly question but why does the Arctic warm so fast despite being so white ("albedo" is the word, I believe)? Isn't all that whiteness supposed to deflect all those pesky sun ...
4
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0answers
32 views

Carbon emission from estuaries

I've heard that estuaries like Chesapeake Bay produce a lot of methane during anoxic conditions. Is there a chance of these estuaries emitting significant amounts of CH4 in the future (because of the ...
2
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0answers
35 views

Do greenhouse gases absorb and re-emit photons or reflect them diffusely? Or both? (CO2, CH4, H2O, N20, HFC-134a, etc.)

Also, would it matter if a particular type of greenhouse gas molecule reflected rather than absorbed and then re-emitted light? Would its GWP be higher or lower? Perhaps this is more of a pure ...
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2answers
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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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0answers
53 views

Is cutting down boreal forest good or bad for our climate?

I read in the latest IPCC report that felling trees growing in Northern areas lays bare snow cover that, since it's white, reflects sun rays so it's kinda good (or at least, has a substantial positive ...
6
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1answer
97 views

Would home heat pumps provide large benefits against climate change?

Some facts I have learnt The Global Warming Potential (GWP) was developed to allow comparisons of the global warming impacts of different gases. Specifically, it is a measure of how much energy the ...
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5answers
10k views

Why is the Arctic melting, but the Antarctic doing great?

Why is the Arctic melting, but the Antarctic doing great? That's what the latest IPCC report says (p. 2-192 of the Physical Science Basis provides a time series), but it says nothing, unless I missed ...
2
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2answers
72 views

What is the difference between surface specific humidity and surface relative humidity?

What is the difference between surface specific humidity and surface relative humidity (it's wetter and dryer respectively)? The trends, according to the latest IPCC report, are opposite for the two, ...
2
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1answer
36 views

What happens if a cyclone can reach the warm waters of the Persian Gulf?

Historically cyclones were very very rare along the southern coast of Iran, maybe one in a century. But in recent years two cyclones hit Iran and northern Oman: Cyclone Gonu in 2007 and recently ...
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1answer
128 views

Is anthropogenic global warming unavoidable under modern civilisation? [closed]

Which are the reasons to believe that the climate crisis can be solved within our type of civilisation, that is, without putting in jeopardy the important advances of humanity that have been achieved ...
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2answers
731 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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0answers
76 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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1answer
34 views

Does increased water vapour in atmosphere increase the risk of hypoxia?

I recently found that each degree of warming increases water vapour by 7% and I've also learned that the atmosphere contains (on average) between 1-5% water vapour when saturated, this confused me a ...
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5answers
132 views

Does global warming inhibit transport of moisture?

This northern summer, 2021, there were wildfires in Southern Europe and floods in Germany nearly at same time, also, floods and wildfires in different parts of Turkey, and floods in Far East of Russia ...
4
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1answer
60 views

Why are the CMIP6 model outputs for Relative Humidity not scaled to between 1-100%?

I have been looking at the CMIP6 model outputs for 'hur' (Relative Humidity/RH) and I see that they are not scaled to be between 1 and 100 (the units are percent). Why is this? Is it just an oversight ...
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1answer
35 views

How can I calculate the relative change in Precipitation using CMIP models without producing unrealistic results in Dry areas?

I am calculating changes in precipitation using the Delta method, wherein the relative changes are calculated thus: Delta change = (modelled Future climatology (2050s) - modelled historical ...
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1answer
1k views

Why is the energy transition start not reflected in the CO2 concentration graphs?

This is a graph from a reputable source of CO2 concentrations in atmosphere the last decades: I would expect that, as we have been using clean energy for some years now, the graph would start to ...
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2answers
2k views

Do satellites decrease the amount of solar radiation reaching Earth?

According to this website, there were 3,372 active satellites in orbit at the beginning of 2021. Furthermore, SpaceX is planning to launch 12,000 satellites to provide cheap internet for everybody, ...
3
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1answer
91 views

When would the next glaciation appear? Worst case

Suppose that the IPCC's best estimate of climate sensitivity (3 K) is relevant and that the Keeling curve will increase as now, with a certain procent more emission next year than previous year, into ...
3
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1answer
55 views

Does deforestation increase global temperatures or just local temperatures?

Did human-caused deforestation impacted climate and rainfall patterns in the past? I'm asking this because I don't know much about the impact of forest cover loss and evapotranspiration on global ...
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2answers
181 views

How much does earth's core temperature affect earth's global surface temperature

Has anyone managed to read the (latest) full IPCC-report and do you know whether they have taken into account the Earth's core temperature in their models. Besides the IPCC-report, do we know how much ...
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0answers
35 views

Are there climatic projections for past conditions in Northern Europe?

I'm looking for projections of past climatic conditions during the last two millennia for northern Europe. I know there are initiatives studying tree rings, but I want to know whether there are ...
3
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1answer
67 views

Was there a period of global warming before the start of the last ice age?

I am curious to know if there was a period of global warming that took place before the start of the last ice age and I would like to know how long this period of global warming lasted.
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1answer
145 views

If ocean water was pumped into a desert would it help cool the planet?

Water pumped into a desert would evaporate and increase formation of clouds which would in turn increase the albedo of the Earth. Would this help to cool the planet more efficiently than trying to ...
6
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1answer
103 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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2answers
114 views

Can we run out of air because of global warming?

Can it be that our air will be unbreathable in a few years due to CO2 emission? I think I may suffer from global warming anxiety and I accuse CO2 for my shortness of breath. Is it rational?
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6answers
4k views

How does global-warming-triggered ice melting cause global sea levels to rise?

Apologies for asking a silly question like this. But I want to offer some points which I could not counter, as follows: Ice is less dense than water, that is why it floats. For the same unit mass, if ...
9
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2answers
2k views

Have there been any studies on how vehicles directly contribute to a rising global temperature?

I've tried searching for this myself, but Google is saturated with the Greenhouse Gases angle of Rising Global Temperatures. What I'm interested in is the following: Greenhouse gases aside, to what ...
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1answer
409 views

Do perfumes and deodorants contribute to global warming?

If perfumes and deodorants cause air pollution, does that mean they also heat the planet?
2
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1answer
227 views

Would freezing the ocean and storing the ice in the poles reduce effects of climate change or sea level?

Disclaimer I've read this question already on sending water to the north pole, south pole and glaciers, and I thought I'd give it my own take and see how technically possible it could be. Question As ...
4
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2answers
148 views

How much would 5 gigatons of methane warm the atmosphere compared to 5 gigatons of CO2 if both were released in one go?

I don't know much about science, I'm just curious about how much warming a certain amount of CH4 would cause compared to a similar amount of CO2 (both 5 GtC). I'm sorry if the question sounded a bit ...
3
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1answer
61 views

Simple model that exhibits a climate tipping point

I am trying to understand climate tipping points better and I am looking for a place to ask the following question. If Earth Science SE isn't the right place, a recommendation of a better place would ...
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2answers
5k views

I just read news that Antarctica had set a new record high temperature, above 18 °C. How can this be the case if it is currently winter there?

Currently it is winter in Antarctica. According to news I read, Antarctica has set a new record high temperature, above 18 °C. How did this temperature records occur?
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1answer
87 views

Wouldn't 'fertilizing' the ocean to increase cyanobacteria, algae and other phytoplankton populations actually INCREASE CO2 levels in the air?

From the July, 2021 Scientific American: The Carbon rocks of Oman: "...fertilizing the ocean would increase the growth of phytoplankton that naturally absorb CO2 through photosynthesis'. (page ...
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1answer
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 (...
4
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1answer
82 views

Are small reductions in CO2 emissions better than no reductions, in terms of mitigating climate change?

My understanding of climate change is that a large increase in human-caused CO2 emissions is likely to lead to large change in the Earth's climate through a global warming effect. Scientific consensus ...
2
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1answer
73 views

If we send ocean waters into glacier of north pole/south pole to reduce sea level, will it help global warming?

this is my first time posting in Earth Science, please be gentle to me. I am Science Enthusiast, though numbers are my enemies for now so I can't come up with formulas or any form of calculations. ...
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0answers
51 views

Best realistic-case scenario, what does our climate look like in 30 years...50 years...a 100 years?

Let's assume, humanity can decide to care more about the survival of our species, our duty to our descendants, than getting rich now. How long would it reasonably take to get to net-zero carbon ...

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