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Questions tagged [climate-change]

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

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12
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2answers
1k views

When will glaciation resume? Has global warming delayed return to global cooling?

As far as I understand, we are currently living in the Holocene, an interglacial period of the Quaternary glaciation, i.e. the current ice age that has so far lasted 2.6 million years. The Holocene ...
2
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2answers
683 views

Estimated volume, daily or annually, of sea level rise due to melting ice?

Its a big number, difficult to estimate I assume. But is there a peer reviewed estimation (at current conditions) of the volume of daily or annual increase of water?
19
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3answers
711 views

How do we know that we are NOT in an “Ice Age?”

Historically, the earth has had five "Ice Ages" Each of them lasted millions, tens of millions, or hundreds of millions of years. The last ice age reportedly ended perhaps 10,000 years ago. That ...
6
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0answers
435 views

How much of Earth's surface would be covered by water if all ice melted? [duplicate]

I'm trying to find how much water would be on the surface of Earth and how much surface would it cover (how much land will remain) if all the ice at the North and South Poles (and everywhere else) ...
3
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2answers
164 views

Current temperature increase VS decrease during the little ice age

Looking at the following temperature reconstructions i have two questions (source: wikipedia): Why is the y-axis centered around -0.2 °C? Why are the consequences of the current temperature ...
4
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1answer
115 views

What caused the Carbon Dioxide Variations observed in the 800,000-year polar ice record?

I have seen several graphs showing the prehistoric temperatures and CO2 concentrations derived from ice-core data. My understanding is that CO2 and temperature correlate. I assume that Milankovich ...
12
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1answer
272 views

Where does the biggest land-based ice cap reside?

I'm thinking biggest in volume, regarding which area of the planet will contribute more to a raising in sea level - were the ice in those regions to melt. I can basically think of to candidates, ...
11
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3answers
4k views

How long to melt all the polar ice?

The answers to this question say that the sea level will rise 66m if all the polar ice, etc, melts. How long will this take? Transporting incredible amounts of heat energy to the poles and injecting ...
12
votes
1answer
735 views

For what percentage of the earth's history has there been permanent ice?

Wikipedia comments here that "Permanent ice is actually a rare phenomenon in the history of the Earth, occurring only during the 20% of the time that the planet is under an icehouse effect." A "...
1
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2answers
657 views

Polar Ice caps are melting? Questions on enviromental impact

The polar ice caps are melting at a significant rate partly due to the albedo effect, releasing greenhouse gas-methane into earth’s atmosphere. At the same time we are logging our forests for ...
5
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3answers
2k views

Can ice caps reform if they disappear?

Excuse my ignorance. I'm under the impression that there are various types of ice at the poles, but I don't know the difference or the significance of each type, so, in terms of whatever is actually ...
10
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1answer
4k views

Does this peer-reviewed study (referenced in Forbes) contradict the accepted position that climate change is real?

This Forbes article from 2013 (archive link here) with the headline "Majority Of Scientists Skeptical Of Global Warming Crisis" gets brandied around a lot. It states that Only 36 percent of ...
6
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2answers
3k 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 ...
9
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2answers
366 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 ...
11
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6answers
4k views

If water is a renewable resource, why is there water scarcity?

Water is a renewable resource, renewed by the water cycle. If we use water too quickly, water should get evaporated and come down again as precipitation. So, Why is there water scarcity if water ...
-2
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1answer
92 views

At what rate does Earth's atmosphere shed heat into space? [closed]

If we had a heat bank account (the atmosphere) + heat cash supply (ice) + heat debt (the oceans) could governments find a way to balance our heat economy that doesn't kill ...
3
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1answer
354 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...
4
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1answer
161 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 ...
6
votes
1answer
193 views

Would more or less land be usable if global temperatures rose?

I think a large portion of the earth's land is unusable from being too cold and land that is too hot does not have enough water and dries out which could be fixed by diverging water to those areas. ...
1
vote
1answer
65 views

How much warming there was over time for a specific month?

I'm calculating warming trends in specific places and periods of time, that are related to the time a migratory bird spends in a stopover. But using different methods I got different results and I'm ...
1
vote
1answer
793 views

Understanding a diagram of Earth's radiation balance

Trying to understand this image. Can someone tell me if I have the right reasoning here: Sun has 100% SW shooting to earth 30% of that 100% is reflected by clouds 70% remains Of that 70%, 45% of that ...
9
votes
1answer
335 views

Is altitude of everything decreasing due to sea level rise?

We know that sea level is rising, though some people say climate change is fake. Altitude is defined as the height of something measured from sea level. Since sea level is increasing, and the ...
3
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0answers
31 views

Biomes that existed during the Paleocene-Eocene Thermal Max (PETM)

I understand that you could fill multiple books with descriptions of the PETM and the mechanisms that incited the event. I have always wondered what regions of the world were covered in what types of ...
7
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3answers
1k views

How were the sea levels around western Europe during the Medieval Warm Period?

The Medieval Warm Period (MWP) or Medieval Climatic Anomaly was a time from about 950 to 1250 when climate was warmer than in the timespans immediately before and after. My question is if this ...
1
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0answers
41 views

Can spraying sulphate particulates in the upper atmosphere to lower Earth's temperature have side effects?

According to Geoengineering treatment stratospheric aerosol injection climate change study Planes spraying tiny sulphate particulates into the lower stratosphere, around 60,000 feet up. The idea ...
5
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1answer
46 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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0answers
16 views

How does planned cattle grazing compare with other methods (like carbon capture) of mitigating climate change?

I recently saw a great talk by Allan Savory, the pioneering ecologist about holistic management of cattle grazing to prevent desertification of grasslands. He claimed that it is the only viable way ...
4
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2answers
150 views

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 ...
31
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2answers
1k views

How much of the current global warming is due to human influence?

Approximately what proportion of the global warming seen over the the last century is attributed to anthropogenic sources?
46
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4answers
38k views

How many trees would I have to plant to solve Global Warming?

According to Nasa, causes of the Earth's greenhouse effect include water vapor, carbon dioxide, methane, nitrous oxide, and CFCs. Carbon dioxide gets the most press, and NASA's page says: Carbon ...
4
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2answers
147 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 ...
7
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1answer
804 views

What is the consensus among geologists about climate change being caused by humans?

I'm terribly frustrated with the way that climate change has been debated in Europe. I live in the Netherlands and members of one of the biggest parties here, the Party for Freedom (PVV), frequently ...
1
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2answers
11k views

Why do climate experts from the UN/IPCC rarely mention Grand Solar Minimum?

I've read many papers about Grand Solar Minimums and Glassberg Minimums, known to science for a very long time, and studied and monitored with many public funds. History shows solar activity is the ...
5
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4answers
5k views

Looking for evidence against some points raised in Ivar Giaever's speech on climate change

I just listened to Ivar Giaever's speech on the climate change, and he raised following points which seem significant to me: Temperature differences y/y are very small compared to natural variation ...
4
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1answer
103 views

Weather conditions to create significant glacier growth

I am fascinated at the rapid growth of Glacier Bay Glacier from 1600 to 1750, along with its rapid retreat from 1750 to 1900. I am interested in the local weather conditions during these times. What ...
-2
votes
1answer
151 views

Do HAARP-like programs have effects on climate? [closed]

Military powers like USA, Rusia and China have programs to heat through electromagnetic waves the Ionosphere. HAARP supposedly is a research program, but run by part of the military of US (Air Force ...
10
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1answer
315 views

Unstable North Polar Vortex?

What would cause a polar vortex to become unstable a split into 3 smaller ones? How rare is this and what long term effects could this cause if the vortex stays unstable? http://www.severe-weather.eu/...
4
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1answer
71 views

Waterlevel increase calculation

So I tried to calculate the rise of waterlevel myself. But the results I have gotten seem to be pretty low: Given the earths radius, I clalculated different Events: 1) If all landice melts there is ...
7
votes
1answer
142 views

How much could Earth's temperature increase by the time we run out of oil reserves?

According to this article How long will world's oil reserves last?: At the current rate of extraction oil reserves will last 53 years. And according to this another article, Global temperature - ...
5
votes
1answer
202 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 ...
4
votes
1answer
87 views

Is there consensus amongst climatologists that cold weather extremes are caused by global warming or human influence?

Is there consensus amongst climatologists that cold weather extremes are caused by global warming or human influence? I hear the claim a lot that the recent cold weather extremes (such as the polar ...
6
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3answers
1k views

If there's more water in the atmosphere due to global warming, how are there fewer mountain glaciers?

As I understand it, moisture condenses at mountain tops to form the mountain glaciers that provide water. The mountain topography doesn't change much in the span of a few decades, so if there's more ...
2
votes
3answers
442 views

What evidence is backing the claim that the CO₂ we're releasing in the atmosphere is the main cause of climate change?

There's a lot of evidence that: mankind is putting a lot of CO2 in the atmosphere CO2 levels are currently rising CO2 contributes to the green-house effect, which contributes to increase earth ...
21
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2answers
961 views

What caused the Younger Dryas cold event?

During the termination of the latest ice age the warming climate leading from glacial to interglacial conditions was abruptly reverted by a distinct but short (about 1300 years in duration) cold event,...
5
votes
1answer
48 views

Are there any consequences to carbon capture and storage that also sequesters oxygen?

A big argument for carbon capture and storage is true reversal; while switching to renewable energy and eliminating CO2 emissions is a must, it will not reverse the massive movement of carbon from ...
1
vote
3answers
47 views

Where can I download recent precipitation data for Cape Town

I need data on monthly precipitation for Cape Town between 1970 and 2018. I found this page: http://cip.csag.uct.ac.za/webclient2/datasets/ But it only seems to offer information until 2000. It's the ...
9
votes
1answer
7k views

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 ...
4
votes
1answer
104 views

Is it possible to create ice in poles? [closed]

Is it possible that human can built under the poles a controlled system to create again artificial icebergs? In order keep tight the melting ice and reduce the sea level? Can this system impact the ...
6
votes
1answer
219 views

How significant is human influence on seismic activity?

Here's a graph from johnstonsarchive.net showing energy released by earthquakes and, however reliable this graph is, it shows huge differences in earthquake activity. About how big percent is the ...