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faq page Frequently asked questions
To view an answer, click the link to the right of the question. To view references used by an answer, you must also click the for references at the bottom of the FAQ. Q1: Is there really a scientific consensus on climate change? A1: Yes. The IPCC findings of recent warming as a result of human influence are explicitly recognized as the "consensus" scientific view by the science academies of all the major industrialized countries. No scientific body of national or international standing presently rejects the basic findings of human influence on recent climate. This scientific consensus is supported by over 99% of publishing climate scientists. See also: Scientific consensus on climate change Q2: How can we say climate change is real when it's been so cold in such-and-such a place? A2: This is why it is termed "global warming", not "(such-and-such a place) warming". Even then, what rises is the average temperature over time – that is, the temperature will fluctuate up and down within the overall rising trend. To give an idea of the relevant time scales, the standard averaging period specified by the World Meteorological Organisation (WMO) is 30 years. Accordingly, the WMO defines climate change as "a statistically significant variation in either the mean state of the climate or in its variability, persisting for an extended period (typically decades or longer)." Q3: Can't the increase of CO2 be from natural sources, like volcanoes or the oceans? A3: While these claims are popular among global warming skeptics, including academically trained ones, they are incorrect. This is known from any of several perspectives:
While much of Greenland was and remains under a large ice sheet, the areas of Greenland that were settled by the Norse were coastal areas with fjords that, to this day, remain quite green. You can see the following images for reference:
Arctic sea ice cover is declining strongly; Antarctic sea ice cover has had some much smaller increases, though it may or may not be thinning, and the Southern Ocean is warming. The net global ice-cover trend is clearly downwards. See also: Arctic sea ice decline See also: Antarctic sea ice § Recent trends and climate change Q13: Weren't scientists telling us in the 1970s that the Earth was cooling instead of warming? A13: They weren't – see the article on global cooling. An article in the Bulletin of the American Meteorological Society has reviewed the scientific literature at that time and found that even during the 1970s the prevailing scientific concern was over warming. The common misperception that cooling was the main concern during the 1970s arose from a few studies that were sensationalized in the popular press, such as a short nine-paragraph article that appeared in Newsweek in 1975. (Newsweek eventually apologized for having misrepresented the state of the science in the 1970s.) The author of that article has repudiated the idea that it should be used to deny global warming. Q14: Doesn't water vapour cause 98% of the greenhouse effect? A14: Water vapour is indeed a major greenhouse gas, contributing about 36% to 70% (not 98%) of the total greenhouse effect. But water vapour has a very short atmospheric lifetime (about 10 days), compared with decades to centuries for greenhouse gases like CO2 or nitrous oxide. As a result it is very nearly in a dynamic equilibrium in the atmosphere, which globally maintains a nearly constant relative humidity. In simpler terms, any excess water vapour is removed by rainfall, and any deficit of water vapour is replenished by evaporation from the Earth's surface, which literally has oceans of water. Thus water vapour cannot act as a driver of climate change.Rising temperatures caused by the long-lived greenhouse gases will however allow the atmosphere to hold more vapour. This will lead to an increase in the absolute amount of water vapour in the atmosphere. Since water vapour is itself a greenhouse gas, this is an example of a positive feedback. Thus, whereas water vapour is not a driver of climate change, it amplifies existing trends. See also: Greenhouse gas and Greenhouse effect Q15: Is the fact that other solar system bodies are warming evidence for a common cause (i.e. the sun)? A15: While some solar system bodies show evidence of local or global climate change, there is no evidence for a common cause of warming.
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what they said about climate change in 1970s
I was browsing global warming and cooling. In the 1970s the concenus of scientists were that we were cooling. Forty years later (forty more data points) the scientists have done a 180 degree turn. Assuming that both time periods had competent mathematicians on board, my work in statistics make me wonder how 40 points of new data could reverse a graph ( of thousands,millions,billions of years of data) so totally and quickly. FMI who were these mathematicians - names please - I would like someone to check their work. 2601:181:8301:4510:BC63:9B9F:F762:859C (talk) 01:45, 3 October 2016 (UTC)
- Please see the FAQ - specifically: Talk:Global_warming/FAQ#Q13. --Kim D. Petersen 07:50, 3 October 2016 (UTC)
Semi-protected edit request on 5 October 2016
This edit request to Global warming has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
184.68.180.94 (talk) 17:11, 5 October 2016 (UTC) Global warming isnt real
- Your claim is not supported by reliable sources, nor by reality. Also, our suggestion is a bit vague. --Stephan Schulz (talk) 17:15, 5 October 2016 (UTC)
New study addition?
Does someone want to add this study? I no longer have access to Science, but feel it's important to add this study to the article, and perhaps to Global warming controversy. — Preceding unsigned comment added by YourAuntEggma (talk • contribs) 02:33, 4 November 2016 (UTC)
- @YourAuntEggma: if you haven't read it, why do you think it would improve anything? NewsAndEventsGuy (talk) 10:56, 4 November 2016 (UTC)
- @NewsAndEventsGuy: I've read the abstract and various articles on it. It's not that I don't know what it's about, but that I wouldn't add a study to Misplaced Pages without having access to the full article. Otherwise I'd risk misinforming. YourAuntEggma (talk) 04:32, 8 November 2016 (UTC)
most of the additional energy stored in the climate system since 1970 has gone into the oceans
Can we get a reference for this statement in the intro?
- Although the increase of near-surface atmospheric temperature is the measure of global warming often reported in the popular press, most of the additional energy stored in the climate system since 1970 has gone into the oceans.
Later in the intro there is this statement:
- The rest is absorbed by vegetation and the oceans.
There are four references listed but none back up the earlier statement. Thanks, Daniel.Cardenas (talk) 20:37, 6 November 2016 (UTC)
- The first sentence about "oceans" in this post is talking about the storage of energy. For a long time the sentence read
- More than 90% of the additional energy stored in the climate system since 1970 has gone into ocean warming; the remainder has melted ice, and warmed the continents and atmosphere.
- That ref and note supports the statement, I think, and they are still present in the current version as ref #6 and Footnote A. The semicolon in the former version has been removed and now the clauses are sequential but separate sentences. There is a hidden comment (visible to editors in edit mode) which explains that this ref and note are for both sentences.
- The first sentence about "oceans" in this post is talking about the storage of energy. For a long time the sentence read
- The next sentence about "oceans" in this post is talking about the storage of carbon dioxide. So they are discussing different things. Unless someone else gets to it first, I'll look at the sentence The rest is absorbed by vegetation and the oceans and its refs soon, but later.
- NewsAndEventsGuy (talk) 23:54, 6 November 2016 (UTC)
- When you posted this thread the lead text read
- Currently, about half of the carbon dioxide released from the burning of fossil fuels remains in the atmosphere. The rest is absorbed by vegetation and the oceans.
- 1. (Later) The NYT and AP refs did not support the statement and I removed them from the lead and body, thanks for pointing that out.
- 2. The hour long audio is too cumbersome to expect anyone to use for verification unless there just isn't anything else so I removed that one from the lead and body too.
- 3. The last RS, was this one from NASA JPL. Please see the first paragraph in that RS and then explain why you think it does not support the statement?
- NewsAndEventsGuy (talk) 13:47, 7 November 2016 (UTC)
- When you posted this thread the lead text read
Footnotes and refs for this section
- Scientific journals use "global warming" to describe an increasing global average temperature just at earth's surface, and most of these authorities further limit "global warming" to such increases caused by human activities or increasing greenhouse gases.
References
- "3: Observations: Ocean" (PDF). IPCC WGI AR5 (Report). 2013. p. 257.
Ocean warming dominates the global energy change inventory. Warming of the ocean accounts for about 93% of the increase in the Earth's energy inventory between 1971 and 2010 (high confidence), with warming of the upper (0 to 700 m) ocean accounting for about 64% of the total. Melting ice (including Arctic sea ice, ice sheets and glaciers) and warming of the continents and atmosphere account for the remainder of the change in energy.
{{cite report}}
: Unknown parameter|authors=
ignored (help) - Buis, Alan; Ramsayer, Kate; Rasmussen, Carol (12 November 2015). "A Breathing Planet, Off Balance". NASA. Retrieved 13 November 2015.
- Staff (12 November 2015). "Audio (66:01) - NASA News Conference - Carbon & Climate Telecon". NASA. Retrieved 12 November 2015.
- St. Fleur, Nicholas (10 November 2015). "Atmospheric Greenhouse Gas Levels Hit Record, Report Says". New York Times. Retrieved 11 November 2015.
- Ritter, Karl (9 November 2015). "UK: In 1st, global temps average could be 1 degree C higher". AP News. Retrieved 11 November 2015.
scared
if everything melts it would hit south Dakota first .....................169.203.44.33 (talk) 17:37, 17 November 2016 (UTC)
- Cheer up, it's already hit Miami, Boston and Portland, ME. However, that's offtopic for this overview article, so regrettably we have to keep discussions focussed on article improvement. Good luck, anyway. . dave souza, talk 18:19, 17 November 2016 (UTC)
found some weird article that feeds smear campaign of climate change deniers
You might not yet have found this article called The Gore Effect which is basically a code of practice for climate change deniers. The article comes with some criticism of the alleged “joke” – but the main part is original research and a tutorial on how to plant doubts by cherry picking non related events and manipulating statistics. The article comes with a definiton based on a wiki-based dictionary and more doubtful sources. Maybe the community wants to take care of that. --Kontrollinski (talk) 21:58, 22 November 2016 (UTC)
- I do not see what you are seeing. As far as I can see the article complies with Misplaced Pages guidelines on citations, and NPOV. Dmcq (talk) 23:42, 22 November 2016 (UTC)
Global Warming Summary
- The Earth's temperature is increasing , and breaking the record every year.
- The human activities on planet Earth have a big role in increasing the temperature of the planet surface due to the increase of gas emissions.
- Fossil fuel, coal, and natural gas burning is adding formidable amounts of the greenhouse gases such as Carbon Dioxide into the atmosphere.
- Deforestation has made it difficult to keep the balance of Carbon Dioxide, where plants could exchange CO2 for Oxygen through a process called Photosynthesis.
- The greenhouse gases absorb the heat that the Earth reflects back into the atmosphere, this stops heat from absconding into space and keeps the Earth warm enough to maintain life. With more Carbon Dioxide, Methane, and other gases in the atmosphere, the absorbed heat is more than what the natural level is, thus increasing the Earth's temperature
- The increase of the greenhouse gases in the atmosphere has led to extreme climate changes such as global temperature increase, dangerous events, and sea level rise.
- Solutions are difficult but possible such as renewable energy, cutting down on the use of coal and natural gas, and fighting deforestation. — Preceding unsigned comment added by 50.170.188.29 (talk) 00:18, 23 November 2016 (UTC)
- That's all POV. As such it would fit the article just perfectly. — Preceding unsigned comment added by 82.18.26.37 (talk) 23:30, 7 December 2016 (UTC)
Semi-protected edit request on 24 November 2016
This edit request to Global warming has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
i have important information that must be added immediate Bob mawrlwy (talk) 15:57, 24 November 2016 (UTC)
- And possibly it might go in if we knew what it was - but you haven't said what the edit you wanted to put in is. Therefore request denied. Dmcq (talk) 16:43, 24 November 2016 (UTC)
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