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  • Attic « RealClimate
    The ice core data also agree quite well with the tree ring data where these data sets overlap I will put a couple of plots up when I get a chance For those who are interested some relevant references are Stuiver M Burk R L and Quay P D 1984 13C 12C ratios and the transfer of biospheric carbon to the atmosphere J Geophys Res 89 1731 1748 for tree rings and Francey R J Allison C E Etheridge D M Trudinger C M Enting I G Leuenberger M Langenfelds R L Michel E Steele L P 1999 A 1000 year high precision record of d 13Cin atmospheric CO Tellus 51B 170 193 Comments pop up 31 Why does the stratosphere cool when the troposphere warms Filed under Attic gavin 7 December 2004 This post is obsolete and wrong in many respects Please see this more recent post for links to the answer 14 Jan 05 This post was updated in the light of my further education in radiation physics 25 Feb 05 Groan and again Recent discussions of climate change MSU Temperature Record ACIA have highlighted the fact that the stratosphere is cooling while the lower atmosphere troposphere and surface appear to be warming The stratosphere lies roughly 12 to 50 km above the surface and is marked by a temperature profile that increases with height This is due to the absorbtion by ozone of the sun s UV radiation and is in sharp contrast to the lower atmosphere There it generally gets colder as you go higher due to the expansion of gases as the pressure decreases Technically the stratosphere has a negative lapse rate temperature increases with height while the lower atmosphere s lapse rate is positive More Comments pop up 19 Site Google Custom Search Recent Comments What is the best description of the greenhouse effect Patrick Eriksson What is the best description of the greenhouse effect Kevin McKinney Anti scientists Carbomontanus What is the best description of the greenhouse effect Spencer Marvel et al 2015 Part III Response to Nic Lewis SteveS What is the best description of the greenhouse effect Chris Colose Blizzard Jonas and the slowdown of the Gulf Stream System doiknow What is the best description of the greenhouse effect James Powell Unforced Variations Feb 2016 Jim Galasyn What is the best description of the greenhouse effect Jack Barrett With Inline Responses Marvel et al 2015 Part III Response to Nic Lewis SteveS Marvel et al 2015 Part III Response to Nic Lewis steve s Marvel et al 2015 Part III Response to Nic Lewis Andrew Kerber Blizzard Jonas and the slowdown of the Gulf Stream System Hank Roberts Blizzard Jonas and the slowdown of the Gulf Stream System doiknow Marvel et al 2015 Part III Response to Nic Lewis MartinM Anti scientists Don McKenzie Marvel et al 2015 Part III Response to Nic Lewis Matt Skaggs Anti scientists mikeworst New On line Classes and Models Marcus Pages Acronym index Data Sources

    Original URL path: http://www.realclimate.org/index.php/archives/category/extras/attic/ (2016-02-13)
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  • Comment Policy « RealClimate
    spelling corrections correct text format problems etc We use moderation to improve the signal to noise in the discussion For this reason we may choose to screen out comments that simply repeat points made in previous comments make claims that have already been dealt with or that muddy the water by introducing erroneous specious or otherwise misleading assertions These comments may be sent to The Bore Hole We reserve the right to either reject comments that do not meet the above criteria or in certain cases to edit them in a manner that brings them into accordance with our comments policy e g by simply deleting inflammatory or ad hominem language from an otherwise worthy comment In cases where we do this it will be noted by an edit Given that RealClimate represents a volunteer effort by about 10 different contributors each of whom are free to participate in queue moderation the items indicated above only constitute the basic ground rules We cannot insure uniform application of the various considerations listed above from one individual comment to the next Quick responses to questions that don t merit a full post will be placed in line with credits All comments are assumed to be released into the public domain Comments generally close after a month Repeat violators of our comments policy in particular individuals demonstrating a pattern of trolling may be barred from future access to the blog revised 01 06 11 Comments Off on Comment policy Site Google Custom Search Recent Comments What is the best description of the greenhouse effect Patrick Eriksson What is the best description of the greenhouse effect Kevin McKinney Anti scientists Carbomontanus What is the best description of the greenhouse effect Spencer Marvel et al 2015 Part III Response to Nic Lewis SteveS What is the best description of the greenhouse effect Chris Colose Blizzard Jonas and the slowdown of the Gulf Stream System doiknow What is the best description of the greenhouse effect James Powell Unforced Variations Feb 2016 Jim Galasyn What is the best description of the greenhouse effect Jack Barrett With Inline Responses Marvel et al 2015 Part III Response to Nic Lewis SteveS Marvel et al 2015 Part III Response to Nic Lewis steve s Marvel et al 2015 Part III Response to Nic Lewis Andrew Kerber Blizzard Jonas and the slowdown of the Gulf Stream System Hank Roberts Blizzard Jonas and the slowdown of the Gulf Stream System doiknow Marvel et al 2015 Part III Response to Nic Lewis MartinM Anti scientists Don McKenzie Marvel et al 2015 Part III Response to Nic Lewis Matt Skaggs Anti scientists mikeworst New On line Classes and Models Marcus Pages Acronym index Data Sources Categories Climate Science Aerosols Arctic and Antarctic Carbon cycle Climate impacts Climate modelling El Nino Geoengineering Greenhouse gases Hurricanes Instrumental Record IPCC Oceans Paleoclimate Sun earth connections Communicating Climate Reporting on climate skeptics Extras Attic Comment Policy Contributor Bio s FAQ Glossary In the News Reviews Supplemental data Tutorials

    Original URL path: http://www.realclimate.org/index.php/archives/category/extras/comment-policy/ (2016-02-13)
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  • Contributor Bio’s « RealClimate
    Bloomberg News list of fifty most influential people in 2013 In 2014 he was named Highly Cited Researcher by the Institute for Scientific Information ISI and received the Friend of the Planet Award from the National Center for Science Education He is a Fellow of the American Geophysical Union the American Meteorological Society and the American Association for the Advancement of Science Dr Mann is author of more than 190 peer reviewed and edited publications and has published two books including Dire Predictions Understanding Climate Change and The Hockey Stick and the Climate Wars Dispatches from the Front Lines He is co founder of RealClimate More information about his research and publication record can be found here All posts by mike Comments Off on Michael E Mann Caspar Ammann Filed under Contributor Bio s group 6 December 2004 Caspar Ammann is a climate scientist working at the National Center for Atmospheric Research NCAR Dr Ammann is interested in the reconstruction of natural climate forcings natural climate variability coupled modeling of natural and anthropogenic climate change and data model intercomparison Dr Ammann got his B S from Gymnasium Koeniz Switzerland his M S from the University of Bern Switzerland and a Ph D from the Department of Geosciences at the University of Massachusetts Comments Off on Caspar Ammann Rasmus E Benestad Filed under Contributor Bio s rasmus 6 December 2004 I am a physicist by training and have affiliations with the Norwegian Meteorological Institute My views here are personal and may not necessarily represent those of Met Norway I have a D Phil in physics from Atmospheric Oceanic Planetary Physics at Oxford University in the United Kingdom Recent work involve a good deal of statistics empirical statistical downscaling trend analysis model validation extremes and record values but I have also had some experience with electronics cloud micro physics ocean dynamics air sea processes and seasonal forecasting In addition I wrote the book Solar Activity and Earth s Climate 2002 published by Praxis Springer and together with two colleagues the text book Empirical Statistical Downscaling 2008 World Scientific Publishers I have also written a number of R packages for climate analysis posted http cran r project org I was a member of the council of the European Meteorological Society for the period 2004 2006 representing the Nordic countries and the Norwegian Meteorology Society and have served as a member of CORDEX Task Force on Regional Climate Downscaling In my work I often get questions from media and lay persons about climate change I believe it is necessary to approach these questions with identifying what we really don t know and what we are more sure about I believe that some of Karl Popper ideas about falsification can be useful More Comments Off on Rasmus E Benestad Older Entries Site Google Custom Search Recent Comments What is the best description of the greenhouse effect Patrick Eriksson What is the best description of the greenhouse effect Kevin McKinney Anti scientists Carbomontanus What is the

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  • FAQ « RealClimate
    Activities How Reliable Are the Models Used to Make Projections of Future Climate Change Can Individual Extreme Events be Explained by Greenhouse Warming Can the Warming of the 20th Century be Explained by Natural Variability Are Extreme Events Like Heat Waves Droughts or Floods Expected to Change as the Earth s Climate Changes How Likely are Major or Abrupt Climate Changes such as Loss of Ice Sheets or Changes in Global Ocean Circulation If Emissions of Greenhouse Gases are Reduced How Quickly do Their Concentrations in the Atmosphere Decrease Do Projected Changes in Climate Vary from Region to Region RealClimate Start with our index Informed but in need of more detail Science You can t do better than the IPCC reports themselves AR4 2007 TAR 2001 History Spencer Weart s Discovery of Global Warming AIP Art Robert Rohde s Global Warming Art Informed but seeking serious discussion of common contrarian talking points All of the below links have indexed debunks of most of the common points of confusion Coby Beck s How to talk to Global Warming Skeptic New Scientist Climate Change A guide for the perplexed RealClimate Response to common contrarian arguments NERC UK Climate change debate summary UK Met Office Climate Change FAQ Brian Angliss A Thorough Debunking John Cook Skeptical Science The Global Warming Debate slides Please feel free to suggest other suitable resources particularly in different languages and we ll try to keep this list up to date Comments pop up 293 Does a Global Temperature Exist Filed under Climate Science FAQ RC Forum rasmus 25 March 2007 Does a global temperature exist This is the question asked in a recently published article in Journal of Non Equilibrium Thermodynamics by Christopher Essex Ross McKitrick and Bjarne Andresen The paper argues that the global mean temperature is not physical and that there may be many other ways of computing a mean which will give different trends The common arithmetic mean is just an estimate that provides a measure of the centre value of a batch of measurements centre of a cloud of data points and can be written more formally as the integral of x f x dx The whole paper is irrelevant in the context of a climate change because it missed a very central point CO 2 affects all surface temperatures on Earth and in order to improve the signal to noise ratio an ordinary arithmetic mean will enhance the common signal in all the measurements and suppress the internal variations which are spatially incoherent e g not caused by CO 2 or other external forcings Thus the choice may not need a physical justification but is part of a scientific test which enables us to get a clearer yes or no One could choose to look at the global mean sea level instead which does have a physical meaning because it represents an estimate for the volume of the water in the oceans but the choice is not crucial as long as the indicator

    Original URL path: http://www.realclimate.org/index.php/archives/category/extras/faq/ (2016-02-13)
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  • Glossary « RealClimate
    group 21 December 2004 A collection of airborne solid or liquid particles with a typical size between 0 01 and 10 µm and residing in the atmosphere for at least several hours Aerosols may be of either natural or anthropogenic origin Aerosols may influence climate in two ways directly through scattering and absorbing radiation and indirectly through acting as condensation nuclei for cloud formation or modifying the optical properties and lifetime of clouds from the always useful IPCC glossary See also wiki Aerosol Comments Off on Aerosol Antarctic Oscillation AAO Filed under Glossary group 28 November 2004 Measure of the pressure gradient between the polar and subpolar regions of the Southern Hemisphere Term was introduced by Thompson and Wallace 2000 More information on the AAO can be found here See also Arctic Oscillation AO Comments Off on Antarctic Oscillation AAO Anthropogenic Forcing Filed under Glossary group 28 November 2004 Forcing due to human rather than natural factors Such factors include increased greenhouse gas concentrations associated with fossil fuel burning sulphate aerosols produced as an industrial by product human induced changes in land surface properties among other things Comments Off on Anthropogenic Forcing Older Entries Site Google Custom Search Recent Comments What is the best description of the greenhouse effect Patrick Eriksson What is the best description of the greenhouse effect Kevin McKinney Anti scientists Carbomontanus What is the best description of the greenhouse effect Spencer Marvel et al 2015 Part III Response to Nic Lewis SteveS What is the best description of the greenhouse effect Chris Colose Blizzard Jonas and the slowdown of the Gulf Stream System doiknow What is the best description of the greenhouse effect James Powell Unforced Variations Feb 2016 Jim Galasyn What is the best description of the greenhouse effect Jack Barrett With Inline Responses Marvel et al 2015 Part III Response to Nic Lewis SteveS Marvel et al 2015 Part III Response to Nic Lewis steve s Marvel et al 2015 Part III Response to Nic Lewis Andrew Kerber Blizzard Jonas and the slowdown of the Gulf Stream System Hank Roberts Blizzard Jonas and the slowdown of the Gulf Stream System doiknow Marvel et al 2015 Part III Response to Nic Lewis MartinM Anti scientists Don McKenzie Marvel et al 2015 Part III Response to Nic Lewis Matt Skaggs Anti scientists mikeworst New On line Classes and Models Marcus Pages Acronym index Data Sources Categories Climate Science Aerosols Arctic and Antarctic Carbon cycle Climate impacts Climate modelling El Nino Geoengineering Greenhouse gases Hurricanes Instrumental Record IPCC Oceans Paleoclimate Sun earth connections Communicating Climate Reporting on climate skeptics Extras Attic Comment Policy Contributor Bio s FAQ Glossary In the News Reviews Supplemental data Tutorials hydrological cycle Open thread RC Forum Scientific practice statistics The Bore Hole Books Contributors Highlights Dummies Guide to the latest Hockey Stick controversy El Nino Global Warming and Anomalous U S Winter Warmth Hurricanes and Global Warming Myth vs Fact Regarding the Hockey Stick On attribution On mismatches between models and observations

    Original URL path: http://www.realclimate.org/index.php/archives/category/extras/glossary/ (2016-02-13)
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  • In the News « RealClimate
    the News Reporting on climate eric 8 November 2011 We were pleased to hear from the University of Arizona s Jeff Kargel that the Times Atlas folks are now updating their atlas of Greenland As we reported earlier the first edition was completely in error and led to some rather bizarre claims about the amount of ice loss in Greenland Kargel reports that HarperCollins publisher of the Times Atlas has now fully retracted their error and has produced a new map of Greenland that will be made available as a large format 2 side map insert for the Atlas and will also be available free online Meanwhile Kargel and colleagues have produced their own updated small scale map and have written a paper that includes both their new map and a description of the incident that led up to it Kargel was instrumental in pushing the cryosphere community to send a strong message to the publishers that they needed to correct their mistake A pre print of the paper currently under review and under public discussion on Cryolist is available here Figure 1 in Kargel et al 2011 generated by a collaboration of the Geological Survey of Denmark and Greenland GEUS and the Programme for Monitoring of the Greenland Ice Sheet PROMICE with the Polar Geospatial Center Department of Geology and Geophysics University of Minnesota Contact Michele Citterio GEUS for questions about the glacier outlines or Paul Morin UMinn for questions about the MODIS base image mosaic HarperCollins is to be commended for listening to the scientific community and producing a corrected map Unfortunately and despite recent events demonstrating that popular allegations against climate scientists are all wrong HarperCollins still says on their web site that it s all the scientists fault for not being clear The one thing that is very apparent is that there is no clarity in the scientific and cartographic community on this issue they write Hmm Our own view is that anyone flying over Greenland en route to Europe from North America would instantly have recognized a problem with the Times Atlas assuming they knew their location of course As Kargel and colleagues write in their paper Distinguishing manifest ignorable nonsense from falsehoods that might take root in the public mind is difficult but the magnitude of and apparent authority behind this particular mistake seemed to warrant a rapid and firm response The eventually constructive reaction of HarperCollins which not only withdrew its mistaken claim but also produced a new map to be included in the Times Atlas as an insert shows the value of such a response No less than grotesque trivialization grotesque exaggeration of the pace or consequences of climate change needs to be countered energetically Nevertheless they caution that scientists cannot possibly challenge all of the innumerable misunderstandings and misrepresentations of their work in public discourse Well said Of course many scientists can do more and we encourage all of our colleagues to speak publically about their research and as the international

    Original URL path: http://www.realclimate.org/index.php/archives/category/extras/in-the-news/ (2016-02-13)
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  • Reviews « RealClimate
    10 1016 j gloplacha 2011 09 005 Comments pop up 22 Language Intelligence Lessons on persuasion from Jesus Shakespeare Lincoln and Lady Gaga A Review Filed under Communicating Climate Reviews mike 20 August 2012 Any book that manages to link together the lessons of the Bible Shakespeare Abraham Lincoln and Lady Gaga not to mention Martin Luther King Winston Churchill Bob Dylan and Jerry Seinfeld can t be all bad With Joe Romm s new book Language Intelligence it is in fact ALL good There are lessons galore for the scientists among us who value public outreach and communication The book is a de facto field guide for recognizing and assimilating many of the key tools of persuasive language and speech something that is ever more important to science communicators who face the daunting challenge of having to communicate technical and nuanced material to an audience largely unfamiliar with the lexicon of science sometimes agnostic or even unreceptive to its message and in the case of contentious areas like climate change and evolution already subject to a concerted campaign to misinform and confuse them More Comments pop up 171 The IPCC SREX the report is finally out Filed under Climate Science RC Forum Reporting on climate Reviews statistics rasmus 29 March 2012 Some of us have been waiting quite a while now especially since the road tour meant to present the Special Report on Managing the Risks of Extreme Events and Disasters to Advance Climate Change Adaptation starting in Oslo on January 24th this year The summary for policymakers SPM was released already in 18 November 2011 Kampala and now the report is finally available link More Comments pop up 39 Older Entries Site Google Custom Search Recent Comments What is the best description of the greenhouse effect Patrick Eriksson What is the best description of the greenhouse effect Kevin McKinney Anti scientists Carbomontanus What is the best description of the greenhouse effect Spencer Marvel et al 2015 Part III Response to Nic Lewis SteveS What is the best description of the greenhouse effect Chris Colose Blizzard Jonas and the slowdown of the Gulf Stream System doiknow What is the best description of the greenhouse effect James Powell Unforced Variations Feb 2016 Jim Galasyn What is the best description of the greenhouse effect Jack Barrett With Inline Responses Marvel et al 2015 Part III Response to Nic Lewis SteveS Marvel et al 2015 Part III Response to Nic Lewis steve s Marvel et al 2015 Part III Response to Nic Lewis Andrew Kerber Blizzard Jonas and the slowdown of the Gulf Stream System Hank Roberts Blizzard Jonas and the slowdown of the Gulf Stream System doiknow Marvel et al 2015 Part III Response to Nic Lewis MartinM Anti scientists Don McKenzie Marvel et al 2015 Part III Response to Nic Lewis Matt Skaggs Anti scientists mikeworst New On line Classes and Models Marcus Pages Acronym index Data Sources Categories Climate Science Aerosols Arctic and Antarctic Carbon cycle Climate impacts Climate

    Original URL path: http://www.realclimate.org/index.php/archives/category/extras/reviews/ (2016-02-13)
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  • Supplemental data « RealClimate
    of the non centered Principal Components Analysis PCA convention used by MBH98 in representing the North American International Tree Ring Data Bank ITRDB data series We already demonstrated the falsehood of this assertion here by showing a that the hockey stick pattern emerges using either the MM centered or MBH98 non centered PCA conventions but was censored by MM through an inappropriate application of selection rules for determining the number of Principal Component PC to retain b that use of the correct number of PC series 5 to be kept with the MM centered convention retains the characteristic Hockey Stick pattern as an important predictor and yields essentially the same temperature reconstruction as MBH98 and finally More Comments pop up 9 Rutherford et al 2005 highlights Filed under Supplemental data mike 22 November 2004 The claims of McIntyre and McKitrick regarding the Mann et al 1998 temperature reconstruction have recently been discredited by the following peer reviewed article to appear in the American Meteorological Society journal Journal of Climate Rutherford S Mann M E Osborn T J Bradley R S Briffa K R Hughes M K Jones P D Proxy based Northern Hemisphere Surface Temperature Reconstructions Sensitivity to Methodology Predictor Network Target Season and Target Domain Journal of Climate in press 2005 Key excerpts from the article are provided below More Comments pop up 1 PCA details Filed under Supplemental data mike 22 November 2004 PCA of the 70 North American ITRDB Tree ring Proxy Series used by Mann et al 1998 More Comments Off on PCA details Site Google Custom Search Recent Comments What is the best description of the greenhouse effect Patrick Eriksson What is the best description of the greenhouse effect Kevin McKinney Anti scientists Carbomontanus What is the best description of the greenhouse effect Spencer Marvel et al 2015 Part III Response to Nic Lewis SteveS What is the best description of the greenhouse effect Chris Colose Blizzard Jonas and the slowdown of the Gulf Stream System doiknow What is the best description of the greenhouse effect James Powell Unforced Variations Feb 2016 Jim Galasyn What is the best description of the greenhouse effect Jack Barrett With Inline Responses Marvel et al 2015 Part III Response to Nic Lewis SteveS Marvel et al 2015 Part III Response to Nic Lewis steve s Marvel et al 2015 Part III Response to Nic Lewis Andrew Kerber Blizzard Jonas and the slowdown of the Gulf Stream System Hank Roberts Blizzard Jonas and the slowdown of the Gulf Stream System doiknow Marvel et al 2015 Part III Response to Nic Lewis MartinM Anti scientists Don McKenzie Marvel et al 2015 Part III Response to Nic Lewis Matt Skaggs Anti scientists mikeworst New On line Classes and Models Marcus Pages Acronym index Data Sources Categories Climate Science Aerosols Arctic and Antarctic Carbon cycle Climate impacts Climate modelling El Nino Geoengineering Greenhouse gases Hurricanes Instrumental Record IPCC Oceans Paleoclimate Sun earth connections Communicating Climate Reporting on climate skeptics Extras Attic Comment Policy

    Original URL path: http://www.realclimate.org/index.php/archives/category/extras/supplemental-data/ (2016-02-13)
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