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Global temperature record article. This is not a forum for general discussion of the article's subject. |
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This article was the subject of a Wiki Education Foundation-supported course assignment, between 19 January 2021 and 7 May 2021. Further details are available on the course page. Student editor(s): YuyanWang.
Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT ( talk) 22:27, 16 January 2022 (UTC)
( William M. Connolley 22:43, 1 Mar 2005 (UTC)) I created this page, following discussion Talk:Temperature_record_of_the_past_1000_years#No_one_has_objected, as a link page for the various temperature records pages from various sources.
There are no temperatures in the article. The title needs to be changed to reflect the content (maybe 'temperature anomaly record'). If actual temperatures (in degrees Celsius, Fahrenheit or Kelvin) are available, maybe a new page with the original title could be created.
---
Years later I come here looking for the same thing. Finally found an explanatory NASA page https://data.giss.nasa.gov/gistemp/faq/abs_temp.html giving the Surface Air Temperature (SAT) global average as around 14 C. That's 287 K without a suppressed zero. So a 1 degree Celsius anomaly is about 0.3 percent. Rairden ( talk) 19:07, 23 July 2019 (UTC)
I created a page on the geologic temperature record in order to provide a place for a deep time perspective for changes in Earth's climate. Right now it is pretty qualitative and not well-documented, but at least it is a start. Dragons flight 07:24, Mar 3, 2005 (UTC)
Followup moved to Talk:Geologic temperature record
Since the title of this article is "Temperature Record", it should be limited to the discussion of, well, temperature records and not speculations about past temperatures (when there were no records) based upon inferences drawn from secondary or tertiary sources.-- JonGwynne 04:37, 27 Apr 2005 (UTC)
( William M. Connolley 09:19, 27 Apr 2005 (UTC)) JGs distinctions are specious. All T "records" are proxies, but some (thermometers) are more exact than others (d-o-18).
Does JG say that carbon dating is not a record of how old something is because one uses a proxy to calculate it? Science is the art of inferring from primary sources using artifical measures as proxies to represent a quality in a quantitative way (e.g temperature). JG's approach would mean there was no science. He needs to read more.
Is there a article about high and low temperature records? the highest and the lowest? or Avg hi and avg Lo? Not just the data of the record itself ...
J. D. Redding 04:48, 30 April 2007 (UTC)
nvr mind ... found something that will work. Temperature extremes ... might to a top disambig on this page to note extreme records vs record as a set of data ... J. D. Redding
The US National Academy of Sciences looked into the Hockey Stick controversy and advised that strip bark trees are not temperature proxies. Since all trees more than 600 years old are strip bark trees, Loehle reconstructed temperature going back 2,000 without using tree ring data. He found the MWP to be consistent at the 18 sites he studied all over the globe and found the MWP was 0.3C warmer than the late 200th century. [1] RonCram ( talk) 01:37, 18 November 2007 (UTC)
(1600 AD) James Hawley:Jean-Marc Jancovici
15 °C (November 2004) —Preceding unsigned comment added by 76.1.94.141 ( talk) 20:33, 9 August 2010 (UTC)
Would it be possible to update the temperature record graphs to reflect more up-to-date information? I keep reading that global temperatures haven't risen in quite some time, and it would be nice if this page noted that. Zoomwsu ( talk) 00:26, 6 June 2008 (UTC)
I don't know what the temperatures have done, but I came to note that the chart used is 4 years out of date and needs updating Stephen W. Houghton II 70.150.94.194 ( talk) 15:01, 10 October 2008 (UTC)
To translate Datei:Erdgeschichte.jpg in the German WP would be excellent, it covers the whole 3,6 Billion years basic climate record. BR -- Polentario ( talk) 00:55, 23 January 2009 (UTC)
The graph on the upper right is bassed on reseasrch that has been shown to have significant flaws http://www.climateaudit.org/pdf/others/07142006_Wegman_Report.pdf
It leaves the impression that the the Medival Warming Period was coldder than today. There is not a scientific consensus to support this notion. —Preceding unsigned comment added by Markllo ( talk • contribs) 01:11, 17 February 2009 (UTC)
I stumbled upon a video describing an apparent bug in NASA's temperature record. The original blog post with the findings can be found here: [3]
I wanted to verify the claim so I checked out a climate change advocates response: [4]
In addition: NASA apparently fixed the data with the following record: [5]
I tried finding an official NASA response, but couldn't find it. Can someone compile this issue into the wikipedia article? —Preceding unsigned comment added by 67.181.240.170 ( talk) 04:05, 17 October 2009 (UTC)
Why does none of this data show temperature? They all show some "anomaly" measure. Given that this is an open project it seems prudent to have unanalysed data recording the actual temperature (or year mean for some location, or mean of means even) and not some secondary statistic. —Preceding
unsigned comment added by
MiniPsybetron (
talk •
contribs) 21:40, 10 May 2010 (UTC)
This article is one of a small number (about 100) selected for the first week of the trial of the Wikipedia:Pending Changes system on the English language Wikipedia. All the articles listed at Wikipedia:Pending changes/Queue are being considered for level 1 pending changes protection.
The following request appears on that page:
Many of the articles were selected semi-automatically from a list of indefinitely semi-protected articles. Please confirm that the protection level appears to be still warranted, and consider unprotecting instead, before applying pending changes protection to the article. |
However with only a few hours to go, comments have only been made on two of the pages.
Please update the Queue page as appropriate.
Note that I am not involved in this project any more than any other editor, just posting these notes since it is quite a big change, potentially.
Regards, Rich Farmbrough, 20:36, 15 June 2010 (UTC).
The source for the graph http://data.giss.nasa.gov/gistemp/graphs/Fig.A2.txt Says "(Anomaly with Base: 1951-1980)". The info on the image pages says 1961-1990.
Also, how come it gives 2005 as hottest when pretty much everywhere else (including other graphs on this page) give 1998? —Preceding unsigned comment added by 92.2.6.248 ( talk) 14:52, 13 August 2010 (UTC)
This page says not:
http://en.wikipedia.org/wiki/Holocene_Climatic_Optimum
While temperatures in the Northern Hemisphere were warmer than average during the summers, the tropics and areas of the Southern Hemisphere were colder than average which comprised an average global temperature still overall lower than present day temperatures.[4]
And in our article on Temperature record it says otherwise: The Holocene Climatic Optimum was generally warmer than the 20th century,
Isn't that inconsistent? — Preceding unsigned comment added by 62.87.247.31 ( talk) 22:21, 17 June 2011 (UTC)
Global Average Surface Temperature redirects to here. This seems incorrect, given the fact that nowhere on this page is there a measurement of the global average surface temperature, past or present. There is ample discussion of changes in that measure over time, but no actual discussion of that measure itself. It seems to me to be a failing, if this article doesn't at least represent the title of the article and of all articles that redirect here. Whether Global Average Surface Temperature should cease to redirect here, and potentially be it's own page (assuming someone populated it with information), or whether the information should be included on this page is to me fairly arbitrary, thoughts?
I personally think this article is itself mis-titled. It isn't about the temperature record, it's about historical temperature trends. It has trends, but no baseline. I don't think anyone could determine what the recorded temperature was at any time or place by use of this article, without external research, which defeats the purpose of this entry. This entry seems less encyclopedic and more appendical to the theoretical article that belongs under this name. AaronMP84 ( talk) 06:15, 14 August 2012 (UTC)
"The extra-tropical Northern Hemisphere temperature in the last two millennia: reconstructions of low-frequency variability" by B. Christiansen and F. C. Ljungqvist, Clim. Past, 8, 765-786, 2012
http://www.clim-past.net/8/765/2012/cp-8-765-2012.html (with link to full text) doi:10.5194/cp-8-765-2012
This interesting new reconstruction has a number of findings that challenge the current IPCC consensus:
The meat of the study is in Figures 5 & 6 (p.11 of PDF). Published 4-18-12. Early days, but should be considered for our article. -- Pete Tillman ( talk) 22:18, 17 October 2012 (UTC). Professional geologist, advanced-amateur paleoclimatologist.
Another recent paper supporting a warmer MWP is Esper et al. 2012, "Variability and extremes of northern Scandinavian summer temperatures over the past two millennia," Global and Planetary Change 88–89 (2012) 1–9 Link to full text: [6] From the abstract: "The record provides evidence for substantial warmth during Roman and Medieval times, larger in extent and longer in duration than 20th century warmth."
Of course, this is for a relatively small area compared to Christiansen & Ljungqvist 2012, but it adds some interesting regional details.
Kim, I'll address your query on another occasion -- busy time for me. -- Pete Tillman ( talk) 18:09, 18 October 2012 (UTC)
In this edit we have replaced an old image with the one in the thumbnail. At the file page there is an extensive summary section with a lot of text that appears to lack RSs.
Thoughts? How does one tag images about sourcing? NewsAndEventsGuy ( talk) 13:28, 29 April 2014 (UTC)
Rohde's old GISTEMP plot shows just one estimate of the recent global temperature record, when there are now at least five. It also shows only annual values when all five series provide monthly data. Plotting annually loses important context above the variability inherent in the temperature record (for example, the 1998 El Niño spike). Some other series provide more coverage (start earlier) and use more modern (arguably better) interpretation methods (Berkeley Earth, Cowtan & Way). I propose to replace Rohde's plot with a version of File:Global_monthly_temperature_record.png showing the five recognised instrumental series (including GISTEMP) without the reanalysis and satellite series (which are not relevant in this context). An svg version is in preparation.-- Gergyl ( talk) 11:17, 3 May 2014 (UTC)
I would propose moving and renaming this article as Global temperature record. The current title Temperature record is ambiguous; it could refer either of the subtopics Geologic temperature record or Instrumental temperature record; it could also be mistaken for List of weather records, by readers searching for records of extreme temperatures.
The title should be WP:PRECISE and unambiguous enough to fully define the scope of the article. In this case, the topic is not the record of any arbitrary set of temperatures, but the record of global average temperatures (in atmosphere and oceans) over as much time as such temperatures can be measured or inferred. — Sangdeboeuf ( talk) 09:24, 12 December 2017 (UTC)
Since no objections have yet been raised, I've moved the page. — Sangdeboeuf ( talk) 01:22, 16 December 2017 (UTC)
It would be nice if there would have been more information in this article regarding thermometers since there is one line and then a reference to another article. As well, it could be improved if the article had a simpler layout with less large paragraphs and run on sentence Schneidl12 ( talk) 18:57, 31 January 2019 (UTC)
This
edit request has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
Can this be renamed the "Global temperature anomaly record" ? Since no one has taken the time to put in the base values since it was first written and requested, the revised name would tell people this page has no temperature readings at all, just deviations from some arbitrary baseline values which are different based on the data set chosen. 2600:6C67:867F:DC44:C0B3:4AC0:D225:B6D7 ( talk) 22:55, 17 August 2021 (UTC)
I came to this article today because User:ASRASR had pointed out the following to me: "But what about the existing article ( Global temperature record) - Can't this and the instrumental temperature record be merged? Uses the same graph in the lead." I think a merge might not be needed but the scope of the article had to be clarified. To start with, having the same images in the lead is not good so I have changed that now. Also, I felt that the article would be better off going from the oldest to the most recent time period. So I have changed the ordering. Also, I have used the excerpt function for the section on "instrumental temperature record". I hope this will make it easier for readers to find their way around. I think that most people searching for global temperature stuff really want to know that part that our GHG emissions are causing. So most likely what they actually want to know is the content that is here: instrumental temperature record. For that reason, I have also added a hatnote. I have also started to build up the lead but more is needed. EMsmile ( talk) 08:30, 20 May 2022 (UTC)
The "Ice cores (from 800,000 years before present)" section should mention that ice cores define "the present" as 1950, i.e. they end before the ~0.9°C of warming in the instrumented temperature record since then. The chart File:EPICA_temperature_plot.svg
doesn't say this, you have to visit the Wikipedia page for its data European Project for Ice Coring in Antarctica to see the mention "age (years before 1950)". I've requested the change on its talk page and for now put "1950" in the image's caption.
The definition of 1950 as "today"/"the present"/the time for "ago" seems common in paleoclimatology, e.g. https://www.ncei.noaa.gov/access/paleo-search/cvterms?termId=133 says
calendar year before present
- an age unit of years, calibrated to actual years if derived from radiocarbon dating, before present with present defined as 1950 Common Era. Times after 1950 CE are expressed as negative values.
Somewhere I read a reference explaining that snow takes time to compact to form ice cores, so they're not a good proxy for temperatures in recent decades, but alas I can't find it.
If this applies to every section of the article, it should be mentioned in the introduction, otherwise each mentiom of "present" and "ago" needs the clarification. A lot has happened since 1950. -- Skierpage ( talk) 20:29, 3 March 2023 (UTC)
All of the graphs plot the "temperature anomaly" but this term does not seem to be defined anywhere. I gather that it is the temperature with respect to some reference time period, but this should be explicitely explained (and perhaps linked to from the graphs, since they appear on multiple pages).
—Steven G. Johnson 18:07, 26 September 2006 (UTC)
What is a temperature anomaly? The Y-axis on these graphs
shows increases and decreases in average temperature “anomalies.” An
anomaly is a deviation, or variation, from a “normal” temperature.
Jennifer Z —Preceding unsigned comment added by 69.153.86.42 ( talk) 19:50, 10 October 2009 (UTC)
Define "normal". Define "0 degree" on the graphs.
Otherwise the graphs mean absolutely nothing, as nothing tells deviation or variation compared to what is on presented.
"Gradual changes in Earth's climate of this kind have been frequent during the Earth's 4,540 million year existence and most often are attributed to changes in the configuration of continents and ocean sea ways." I'm at a loss tp know the meaning of "and most often are attributed to changes in the configuration of continents and ocean sea ways.", can anybody help? Thanks. ThomasYehYeh ( talk) 00:27, 20 February 2024 (UTC)
"Temperature estimates relative to 1950 from over 800,000 years of the EPICA ice cores in Antarctica. The present (1950) is on the right side of the graph." The current wordings are difficult for me to understand. Thank you. ThomasYehYeh ( talk) 00:33, 20 February 2024 (UTC)
This is the
talk page for discussing improvements to the
Global temperature record article. This is not a forum for general discussion of the article's subject. |
Article policies
|
Find sources: Google ( books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL |
Archives: 1 |
This article is rated C-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | ||||||||||||||||||||||||
|
This article was the subject of a Wiki Education Foundation-supported course assignment, between 19 January 2021 and 7 May 2021. Further details are available on the course page. Student editor(s): YuyanWang.
Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT ( talk) 22:27, 16 January 2022 (UTC)
( William M. Connolley 22:43, 1 Mar 2005 (UTC)) I created this page, following discussion Talk:Temperature_record_of_the_past_1000_years#No_one_has_objected, as a link page for the various temperature records pages from various sources.
There are no temperatures in the article. The title needs to be changed to reflect the content (maybe 'temperature anomaly record'). If actual temperatures (in degrees Celsius, Fahrenheit or Kelvin) are available, maybe a new page with the original title could be created.
---
Years later I come here looking for the same thing. Finally found an explanatory NASA page https://data.giss.nasa.gov/gistemp/faq/abs_temp.html giving the Surface Air Temperature (SAT) global average as around 14 C. That's 287 K without a suppressed zero. So a 1 degree Celsius anomaly is about 0.3 percent. Rairden ( talk) 19:07, 23 July 2019 (UTC)
I created a page on the geologic temperature record in order to provide a place for a deep time perspective for changes in Earth's climate. Right now it is pretty qualitative and not well-documented, but at least it is a start. Dragons flight 07:24, Mar 3, 2005 (UTC)
Followup moved to Talk:Geologic temperature record
Since the title of this article is "Temperature Record", it should be limited to the discussion of, well, temperature records and not speculations about past temperatures (when there were no records) based upon inferences drawn from secondary or tertiary sources.-- JonGwynne 04:37, 27 Apr 2005 (UTC)
( William M. Connolley 09:19, 27 Apr 2005 (UTC)) JGs distinctions are specious. All T "records" are proxies, but some (thermometers) are more exact than others (d-o-18).
Does JG say that carbon dating is not a record of how old something is because one uses a proxy to calculate it? Science is the art of inferring from primary sources using artifical measures as proxies to represent a quality in a quantitative way (e.g temperature). JG's approach would mean there was no science. He needs to read more.
Is there a article about high and low temperature records? the highest and the lowest? or Avg hi and avg Lo? Not just the data of the record itself ...
J. D. Redding 04:48, 30 April 2007 (UTC)
nvr mind ... found something that will work. Temperature extremes ... might to a top disambig on this page to note extreme records vs record as a set of data ... J. D. Redding
The US National Academy of Sciences looked into the Hockey Stick controversy and advised that strip bark trees are not temperature proxies. Since all trees more than 600 years old are strip bark trees, Loehle reconstructed temperature going back 2,000 without using tree ring data. He found the MWP to be consistent at the 18 sites he studied all over the globe and found the MWP was 0.3C warmer than the late 200th century. [1] RonCram ( talk) 01:37, 18 November 2007 (UTC)
(1600 AD) James Hawley:Jean-Marc Jancovici
15 °C (November 2004) —Preceding unsigned comment added by 76.1.94.141 ( talk) 20:33, 9 August 2010 (UTC)
Would it be possible to update the temperature record graphs to reflect more up-to-date information? I keep reading that global temperatures haven't risen in quite some time, and it would be nice if this page noted that. Zoomwsu ( talk) 00:26, 6 June 2008 (UTC)
I don't know what the temperatures have done, but I came to note that the chart used is 4 years out of date and needs updating Stephen W. Houghton II 70.150.94.194 ( talk) 15:01, 10 October 2008 (UTC)
To translate Datei:Erdgeschichte.jpg in the German WP would be excellent, it covers the whole 3,6 Billion years basic climate record. BR -- Polentario ( talk) 00:55, 23 January 2009 (UTC)
The graph on the upper right is bassed on reseasrch that has been shown to have significant flaws http://www.climateaudit.org/pdf/others/07142006_Wegman_Report.pdf
It leaves the impression that the the Medival Warming Period was coldder than today. There is not a scientific consensus to support this notion. —Preceding unsigned comment added by Markllo ( talk • contribs) 01:11, 17 February 2009 (UTC)
I stumbled upon a video describing an apparent bug in NASA's temperature record. The original blog post with the findings can be found here: [3]
I wanted to verify the claim so I checked out a climate change advocates response: [4]
In addition: NASA apparently fixed the data with the following record: [5]
I tried finding an official NASA response, but couldn't find it. Can someone compile this issue into the wikipedia article? —Preceding unsigned comment added by 67.181.240.170 ( talk) 04:05, 17 October 2009 (UTC)
Why does none of this data show temperature? They all show some "anomaly" measure. Given that this is an open project it seems prudent to have unanalysed data recording the actual temperature (or year mean for some location, or mean of means even) and not some secondary statistic. —Preceding
unsigned comment added by
MiniPsybetron (
talk •
contribs) 21:40, 10 May 2010 (UTC)
This article is one of a small number (about 100) selected for the first week of the trial of the Wikipedia:Pending Changes system on the English language Wikipedia. All the articles listed at Wikipedia:Pending changes/Queue are being considered for level 1 pending changes protection.
The following request appears on that page:
Many of the articles were selected semi-automatically from a list of indefinitely semi-protected articles. Please confirm that the protection level appears to be still warranted, and consider unprotecting instead, before applying pending changes protection to the article. |
However with only a few hours to go, comments have only been made on two of the pages.
Please update the Queue page as appropriate.
Note that I am not involved in this project any more than any other editor, just posting these notes since it is quite a big change, potentially.
Regards, Rich Farmbrough, 20:36, 15 June 2010 (UTC).
The source for the graph http://data.giss.nasa.gov/gistemp/graphs/Fig.A2.txt Says "(Anomaly with Base: 1951-1980)". The info on the image pages says 1961-1990.
Also, how come it gives 2005 as hottest when pretty much everywhere else (including other graphs on this page) give 1998? —Preceding unsigned comment added by 92.2.6.248 ( talk) 14:52, 13 August 2010 (UTC)
This page says not:
http://en.wikipedia.org/wiki/Holocene_Climatic_Optimum
While temperatures in the Northern Hemisphere were warmer than average during the summers, the tropics and areas of the Southern Hemisphere were colder than average which comprised an average global temperature still overall lower than present day temperatures.[4]
And in our article on Temperature record it says otherwise: The Holocene Climatic Optimum was generally warmer than the 20th century,
Isn't that inconsistent? — Preceding unsigned comment added by 62.87.247.31 ( talk) 22:21, 17 June 2011 (UTC)
Global Average Surface Temperature redirects to here. This seems incorrect, given the fact that nowhere on this page is there a measurement of the global average surface temperature, past or present. There is ample discussion of changes in that measure over time, but no actual discussion of that measure itself. It seems to me to be a failing, if this article doesn't at least represent the title of the article and of all articles that redirect here. Whether Global Average Surface Temperature should cease to redirect here, and potentially be it's own page (assuming someone populated it with information), or whether the information should be included on this page is to me fairly arbitrary, thoughts?
I personally think this article is itself mis-titled. It isn't about the temperature record, it's about historical temperature trends. It has trends, but no baseline. I don't think anyone could determine what the recorded temperature was at any time or place by use of this article, without external research, which defeats the purpose of this entry. This entry seems less encyclopedic and more appendical to the theoretical article that belongs under this name. AaronMP84 ( talk) 06:15, 14 August 2012 (UTC)
"The extra-tropical Northern Hemisphere temperature in the last two millennia: reconstructions of low-frequency variability" by B. Christiansen and F. C. Ljungqvist, Clim. Past, 8, 765-786, 2012
http://www.clim-past.net/8/765/2012/cp-8-765-2012.html (with link to full text) doi:10.5194/cp-8-765-2012
This interesting new reconstruction has a number of findings that challenge the current IPCC consensus:
The meat of the study is in Figures 5 & 6 (p.11 of PDF). Published 4-18-12. Early days, but should be considered for our article. -- Pete Tillman ( talk) 22:18, 17 October 2012 (UTC). Professional geologist, advanced-amateur paleoclimatologist.
Another recent paper supporting a warmer MWP is Esper et al. 2012, "Variability and extremes of northern Scandinavian summer temperatures over the past two millennia," Global and Planetary Change 88–89 (2012) 1–9 Link to full text: [6] From the abstract: "The record provides evidence for substantial warmth during Roman and Medieval times, larger in extent and longer in duration than 20th century warmth."
Of course, this is for a relatively small area compared to Christiansen & Ljungqvist 2012, but it adds some interesting regional details.
Kim, I'll address your query on another occasion -- busy time for me. -- Pete Tillman ( talk) 18:09, 18 October 2012 (UTC)
In this edit we have replaced an old image with the one in the thumbnail. At the file page there is an extensive summary section with a lot of text that appears to lack RSs.
Thoughts? How does one tag images about sourcing? NewsAndEventsGuy ( talk) 13:28, 29 April 2014 (UTC)
Rohde's old GISTEMP plot shows just one estimate of the recent global temperature record, when there are now at least five. It also shows only annual values when all five series provide monthly data. Plotting annually loses important context above the variability inherent in the temperature record (for example, the 1998 El Niño spike). Some other series provide more coverage (start earlier) and use more modern (arguably better) interpretation methods (Berkeley Earth, Cowtan & Way). I propose to replace Rohde's plot with a version of File:Global_monthly_temperature_record.png showing the five recognised instrumental series (including GISTEMP) without the reanalysis and satellite series (which are not relevant in this context). An svg version is in preparation.-- Gergyl ( talk) 11:17, 3 May 2014 (UTC)
I would propose moving and renaming this article as Global temperature record. The current title Temperature record is ambiguous; it could refer either of the subtopics Geologic temperature record or Instrumental temperature record; it could also be mistaken for List of weather records, by readers searching for records of extreme temperatures.
The title should be WP:PRECISE and unambiguous enough to fully define the scope of the article. In this case, the topic is not the record of any arbitrary set of temperatures, but the record of global average temperatures (in atmosphere and oceans) over as much time as such temperatures can be measured or inferred. — Sangdeboeuf ( talk) 09:24, 12 December 2017 (UTC)
Since no objections have yet been raised, I've moved the page. — Sangdeboeuf ( talk) 01:22, 16 December 2017 (UTC)
It would be nice if there would have been more information in this article regarding thermometers since there is one line and then a reference to another article. As well, it could be improved if the article had a simpler layout with less large paragraphs and run on sentence Schneidl12 ( talk) 18:57, 31 January 2019 (UTC)
This
edit request has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
Can this be renamed the "Global temperature anomaly record" ? Since no one has taken the time to put in the base values since it was first written and requested, the revised name would tell people this page has no temperature readings at all, just deviations from some arbitrary baseline values which are different based on the data set chosen. 2600:6C67:867F:DC44:C0B3:4AC0:D225:B6D7 ( talk) 22:55, 17 August 2021 (UTC)
I came to this article today because User:ASRASR had pointed out the following to me: "But what about the existing article ( Global temperature record) - Can't this and the instrumental temperature record be merged? Uses the same graph in the lead." I think a merge might not be needed but the scope of the article had to be clarified. To start with, having the same images in the lead is not good so I have changed that now. Also, I felt that the article would be better off going from the oldest to the most recent time period. So I have changed the ordering. Also, I have used the excerpt function for the section on "instrumental temperature record". I hope this will make it easier for readers to find their way around. I think that most people searching for global temperature stuff really want to know that part that our GHG emissions are causing. So most likely what they actually want to know is the content that is here: instrumental temperature record. For that reason, I have also added a hatnote. I have also started to build up the lead but more is needed. EMsmile ( talk) 08:30, 20 May 2022 (UTC)
The "Ice cores (from 800,000 years before present)" section should mention that ice cores define "the present" as 1950, i.e. they end before the ~0.9°C of warming in the instrumented temperature record since then. The chart File:EPICA_temperature_plot.svg
doesn't say this, you have to visit the Wikipedia page for its data European Project for Ice Coring in Antarctica to see the mention "age (years before 1950)". I've requested the change on its talk page and for now put "1950" in the image's caption.
The definition of 1950 as "today"/"the present"/the time for "ago" seems common in paleoclimatology, e.g. https://www.ncei.noaa.gov/access/paleo-search/cvterms?termId=133 says
calendar year before present
- an age unit of years, calibrated to actual years if derived from radiocarbon dating, before present with present defined as 1950 Common Era. Times after 1950 CE are expressed as negative values.
Somewhere I read a reference explaining that snow takes time to compact to form ice cores, so they're not a good proxy for temperatures in recent decades, but alas I can't find it.
If this applies to every section of the article, it should be mentioned in the introduction, otherwise each mentiom of "present" and "ago" needs the clarification. A lot has happened since 1950. -- Skierpage ( talk) 20:29, 3 March 2023 (UTC)
All of the graphs plot the "temperature anomaly" but this term does not seem to be defined anywhere. I gather that it is the temperature with respect to some reference time period, but this should be explicitely explained (and perhaps linked to from the graphs, since they appear on multiple pages).
—Steven G. Johnson 18:07, 26 September 2006 (UTC)
What is a temperature anomaly? The Y-axis on these graphs
shows increases and decreases in average temperature “anomalies.” An
anomaly is a deviation, or variation, from a “normal” temperature.
Jennifer Z —Preceding unsigned comment added by 69.153.86.42 ( talk) 19:50, 10 October 2009 (UTC)
Define "normal". Define "0 degree" on the graphs.
Otherwise the graphs mean absolutely nothing, as nothing tells deviation or variation compared to what is on presented.
"Gradual changes in Earth's climate of this kind have been frequent during the Earth's 4,540 million year existence and most often are attributed to changes in the configuration of continents and ocean sea ways." I'm at a loss tp know the meaning of "and most often are attributed to changes in the configuration of continents and ocean sea ways.", can anybody help? Thanks. ThomasYehYeh ( talk) 00:27, 20 February 2024 (UTC)
"Temperature estimates relative to 1950 from over 800,000 years of the EPICA ice cores in Antarctica. The present (1950) is on the right side of the graph." The current wordings are difficult for me to understand. Thank you. ThomasYehYeh ( talk) 00:33, 20 February 2024 (UTC)