Questions tagged [climate-change]

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

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1answer
102 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 ...
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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 ...
4
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1answer
357 views

Effects of global warming on drought in India

Is there an intuitive explanation for non-specialists why India is projected to experience a decrease in drought (= increase in PDSI) due to global warming, unlike most areas at the same latitude(s), ...
4
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1answer
100 views

Cooling film area to undo global warming

It is estimated that only 100 square miles of solar panels could completely satisfy the United States demand for energy. This got me thinking: A cooling film developed at UC Boulder claims it can ...
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2answers
680 views

Why is Vladivostock so cold, while Dalian is so warm?

Over at SE History we're pondering the relation of temperature to Russian motives in establishing its Port Arthur colony in the late 1800's. Wikipedia says that Vladivostok is cold due to the ...
4
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1answer
176 views

Is “Carbon Neutral” (roughly) 5 Gt CO₂ equivalent?

One key target set out by the IPCC is to be carbon neutral by 2050. That is, the gross green house gas emissions of Humans is less than the carbon absorbed. I'm struggling to find a good source for ...
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 ...
4
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1answer
134 views

Was climate change inevitable anyway, or is there more to it?

Climate change is now one of the greatest challenges facing humanity, but it seems that we have been here before; if we look at the world's climate over a much longer period than 150 years. During ...
4
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1answer
109 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 ...
4
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1answer
134 views

Polar melting and the equator

As the polar ice caps disappear, the equatorial regions must take the bulk of extra water due to the earth's spin. My question is will the tilt of the earth be affected and what would be the ...
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2answers
84 views

Is it normal for a cyclonic storm to form at the latitude of New York, USA?

I am following climate activist Greta Thunberg's sail to N America from Europe on https://tracker.borisherrmannracing.com/. The model shows a cyclonic storm forming south of Nova Scotia, east of New ...
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1answer
130 views

Understood cause of sea level rise between 1850 and 1950

This question is based on the following graph from a 2018 report by J. Curry. (I haven't found any peer-review of the report itself so I can't vouch for the validity of its claims, but that's not the ...
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1answer
78 views

Which CMIP5 models give the highest and lowest warming for RCP8.5?

Question is in the title. I'm doing impacts research and need to pick a couple of scenarios before downloading GCM runs. Want to pick a low one and a high one and one in the middle of the road. I'm ...
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2answers
459 views

What are the formulae for calculating the thermal heating effect of back radiation in greenhouse gases?

The ability of greenhouse gases to trap heat and re-radiate some of it back to the original heat source looks like a useful thermal property which could possibly be incorporated in things like double ...
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1answer
70 views

How are CO2 emission effects and high altitude effects of air travel compared to each other?

The climate impact of air travel is often divided into CO2 emissions and "high altitude effects" like that of water vapour and cloud formation. The effect of the emitted CO2 is cummulative, as CO2 has ...
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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 ...
4
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1answer
88 views

Status of overdue glaciation hypothesis

What is the status of the Early Anthropocene hypothesis, in the specific meaning that the climate would be projected to be significantly cooler (such as, on the order of by 0.8 degrees in the planet ...
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1answer
298 views

How does the lifetime of methane vary in the atmosphere?

When reading about methane and its effect on climate, it is clear that its lifetime in the atmosphere is important to the global warming potential. However, the lifetime does vary from 9 to 15 years, ...
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0answers
86 views

How temperature anomaly are measured

Temperature Anomaly is the measure used to show that the earth is warming. The formula for temperature anomaly involves in the subtraction of average temperature measurement over 30 years considered ...
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0answers
81 views

Do man-made machines take natural Nitrogen out of the atmosphere and in turn cause global warming?

I read in Wikipedia that, "Natural Nitrogen, Dinitrogen forms about 78% of Earth's atmosphere. Dinitrogen is the most abundant uncombined element in the atmosphere." Do man-made machines destroy the ...
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52 views

How is the vertical distribution of water vapor changing?

In this publication about data assimilation and observations (paywall alert) in the chapter General Concepts in Meteorology and Dynamics (by Andrew Charlton-Perez, William Lahoz, Richard Swinbank, ...
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0answers
161 views

How to relate RCM/GCM RCP climate projections to observational data for use in a hydrologic model

As a (smaller) part of my research, I want to look at climate projection data and how that might influence the hydrology within a study catchment in Rajasthan, India. For "the present day" climate, I ...
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0answers
50 views

How well do past climate models stick to current observations? [duplicate]

I'm wondering how good the climate models of the recent past have been at predicting the current climate. Notably, I've heard quite a few times that the temperature was increasing faster than the ...
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0answers
75 views

How to do frequency analysis of an index when some years have zero value?

I want to do frequency analysis of drought severity, but unlike precipitation data here I have few zero values in some of the years. how to do this? Here is the sample data: ...
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3answers
906 views

Regarding the melting glaciers and icebergs, why isn't the extra water vapor in the atmosphere mentioned in discussions of global warming?

As is reported on the major news networks, many glaciers and big icebergs are melting, which reportedly causes a tremendous increase in the amount of water vapor in the atmosphere. Now a lot of ...
3
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1answer
246 views

Is it possible that a reduction in vegetation is a cause of global warming?

A lot of people seem to believe that the entire cause of global warming is that humans are emitting lots of carbon dioxide. However, according to a source I found online (I accept it may not be ...
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4answers
132 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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5answers
255 views

How Can Smog in Metropolitan Cities like Delhi & Beijing Be Reduced?

These two cities are facing the worst smog in Asia and I think in the world and people of these cities have no choice other than to wear masks when going outside. ...
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3answers
173 views

Is everything affecting everything on Earth?

If a single butterfly can alter the future, then can't every single action keep the future in chaos? According to the question about butterfly effects, this must be so, is it not? If this is an ...
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1answer
644 views

Are we going to enter a mini ice age by 2030?

According to this article, a mini ice age could hit Earth by 2030 Mini Ice Age could hit Earth by 2030 and according to this video NASA admits mini ice age coming faster than anticipated. ...
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1answer
352 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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2answers
580 views

Climate change hoax [closed]

I see many scientific articles and newspapers out there saying that the climate change is happening. Yet, there are people who believe climate change is a hoax and a lie. But I haven't seen any '...
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2answers
161 views

Implications of recent 36 degrees Fahrenheit (20C) anomaly at North Pole?

This extreme difference from normal -- could it occur in climates that are warmer, making some places unlivable? Additionally, is there a reason why extremely cold places should expect to have ...
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1answer
87 views

3 Billion years ago, the earth is covered with Carbon Dioxide. Where did it go?

Oxygen gas began to appear on the earth surface about 2 billion years ago by photosynthesis. Carbon Dioxide was converted into carbohydrates in the process. Where did these carbohydrates go? If they ...
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1answer
167 views

Why doesn't Earth absorb our carbon emissions?

If we look at the carbon cycle, we see that man-made carbon emission only account for a tiny fraction of all $\text{CO}_2$ emissions. However, we see a steady rise in atmospheric $\text{CO}_2$-levels....
3
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1answer
356 views

Does global warming affect tsunamis?

I have been doing some research into global warming, and I was curious as to whether or not increasing the temperature of the oceans would affect tsunamis to any significant degree. My gut tells me ...
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1answer
203 views

Making sense of the math of climate change

Let me state upfront, I'm not arguing the existence of climate change, just trying to clarify my own understanding of something that doesn't make sense to me yet. With apologies for the layman's ...
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3answers
192 views

Had the climatologists predicted climate change as the deviations to both extremely cold and hot temperatures before?

Recently I read that the current extreme snowfall in northern temperate climate is caused by the increased evaporation due to the global warming. Had any scientist predicted these extremes before ...
3
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1answer
86 views

What is meant by Global-warming Potential (GWP)?

I was under the impression GWP (global-warming potential) is the measure of a gas' impact on global warming, in comparison with CO2. E.g. methane has a GWP of 86 over 20 years - Wikipedia Comparing ...
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1answer
92 views

Is there scientific evidence connecting the current climate in India with global warming?

Experts say up to 40 % of India might witness drought this year. Is there scientific evidence that this is due to the global warming and climate changes?
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1answer
64 views

Were there any plans or proposals for “unilateral geoengineering deployments” before this paper was publsihed?

I saw the catchy Phys.org news title Artificially cooling planet 'risky strategy,' new research shows and then looked at the open access article, in Nature Communications (14-Nov-2017 online) Impacts ...
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1answer
97 views

Is evapotransporation accounted for in climate models?

Is evapotransporation accounted for in climate models, or is it considered so insignificant that it's not considered? Could additional crops being planted within the last 100 to 50 years account ...
3
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1answer
388 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 ...
3
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1answer
228 views

UAH and RSS Lower Troposphere data

The UAH 6.0 and RSS lower troposphere data sets line up nearly perfectly and both show no significant warming for over 20 years. What is the leading theory for what's going on? What explains this?
3
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1answer
223 views

How much reduction of insolation (solar energy) would be required to stop global warming?

Suppose a giant sheet of semi-reflective mylar (or some other kind of partial sun-screening material) was temporarily placed into space between the Earth and the Sun with the intent to lower the ...
3
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1answer
93 views

If today's Earth becomes warmer, how will it compare to the Earth of the Cretaceous period?

Most pessimistic scenarios about climate change predicts a global rise of temperature of several Celsius degrees over the course of the 21st century if no action is taken. While such a shift in ...
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1answer
111 views

What happens when the North and South poles flip?

How long does it take the magnetic field to move once the poles start to flip? What environmentally would change? Does the core of the Earth flip? The magnetic poles are moving now. When will it ...
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1answer
202 views

How much energy would be required to actively reduce the temperature of the oceans of Earth by 1℃?

Is there a way to calculate the energy required to reduce the heat of oceans? Am I wrong in thinking it is not as simple as reversing the calculation for specific heat of sea water?
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78 views

Equations for Milankovitch Factors?

Are there equations for the radiative forcings of the three Milankovitch factors at any given time? Or a database of values?
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1answer
113 views

CMIP5 multi-model ensemble, can it be shown as ensemble average?

Let’s say I have got 15 CMIP5 models’ outputs of a given variable e.g. temperature, for RCP6.5 (2020-2100) run. I want to plot how the temperature will change in the future 2020-2100 (scatter plot, x ...