group

The Surface Temperature Record and the Urban Heat Island

6 Dec 2004 by group

There are quite a few reasons to believe that the surface temperature record – which shows a warming of approximately 0.6°-0.8°C over the last century (depending on precisely how the warming trend is defined) – is essentially uncontaminated by the effects of urban growth and the Urban Heat Island (UHI) effect. These include that the land, borehole and marine records substantially agree; and the fact that there is little difference between the long-term (1880 to 1998) rural (0.70°C/century) and full set of station temperature trends (actually less at 0.65°C/century). This and other information lead the IPCC to conclude that the UHI effect makes at most a contribution of 0.05°C to the warming observed over the past century.

The Bore Hole

6 Dec 2004 by group

A place for comments that would otherwise disrupt sensible conversations.

Contributors

6 Dec 2004 by group

The current contributors to content on this site are:

William Connolley was a contributor, but has now left academia; Ray Bradley, David Archer, and Ray Pierrehumbert are no longer active; Jim Bouldin was a contributor from 2009 and Caspar Ammann and Thibault de Garidel were early supporters of the site. Group posts can be assumed to be the from the whole set of current contributers, or will be individually signed.

Caspar Ammann

6 Dec 2004 by group

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.

William M. Connolley

6 Dec 2004 by group

When I joined RC, I was a climate modeller with the British Antarctic Survey. Now I’m a software engineer for CSR. I’m still interested in communicating the science of climate change, but can no longer do so at a professional level.

I’m also elsewhere: the wikipedia project is developing into a useful resource, and my profile is User:William_M._Connolley. My personal vanity site is at www.wmconnolley.org.uk.

One of the people in the picture is me. Guess which.

ps: all my contributions online are released under the GFDL, unless I explicitly note otherwise.

Thibault de Garidel

6 Dec 2004 by group

Dr. de Garidel received his Bachelor’s degree in Earth Sciences from the Université Lyon I, France, completed a Master in the Université Bordeaux I, France and a Ph.D. in Geosciences at CEREGE, Université Paul Cézanne (a.k.a. Aix-Marseille III).

More information about his research and publication record can be found here.

What does the lag of CO₂ behind temperature in ice cores tell us about global warming? Quelle information sur le réchauffement climatique nous apportent les études qui concluent à un retard du CO₂ sur la température, réalisées à partir des carottes de glace?

3 Dec 2004 by group

This is an issue that is often misunderstood in the public sphere and media, so it is worth spending some time to explain it and clarify it. At least three careful ice core studies have shown that CO₂ starts to rise about 800 years (600-1000 years) after Antarctic temperature during glacial terminations. These terminations are pronounced warming periods that mark the ends of the ice ages that happen every 100,000 years or so.

Does this prove that CO₂ doesn’t cause global warming? The answer is no.
Par Jeff Severinghaus (traduit par Nicolas Caillon)

Les résultats de ces études ne sont pas toujours bien compris par le public, souvent mal restitués par les médias, et méritent donc davantage d’explications. Au moins 3 études détaillées réalisées à partir de carottes de glace montrent que le CO₂ commence à augmenter autour de 800 ans (entre 600 à 1000 ans) après le démarrage de l’augmentation de température lors des terminaisons glaciaires. Ces terminaisons sont les périodes de réchauffement qui marquent la fin des périodes glaciaires et qui se produisent tous les 100 000 ans.
[Read more…] about What does the lag of CO₂ behind temperature in ice cores tell us about global warming? Quelle information sur le réchauffement climatique nous apportent les études qui concluent à un retard du CO₂ sur la température, réalisées à partir des carottes de glace?

1 Dec 2004 by group

https://www.realclimate.org/index.php/archives/2004/12/search-results/

About A propos

1 Dec 2004 by group

RealClimate is a commentary site on climate science by working climate scientists for the interested public and journalists and has been operating since Dec 2004. We aim to provide the context sometimes missing in mainstream commentary on climate science. The discussion here is mostly restricted to scientific topics though we maintain open threads for the political or economic implications of the science and for discussions of possible solutions. All posts are signed by the author(s), except ‘group’ posts which are collective efforts from the whole team. Please note this is a moderated forum.

RealClimate est un site de discussion sur les sciences du climat pour le public et les journalistes depuis decembre 2004, site animé par des scientifiques actifs dans ce domaine. Notre objectif est de fournir le contexte scientifique souvent absent dans les médias. Les discussions sur ce site sont pour la plupart limitées aux sujets scientifiques, et n’aborderont pas les implications politiques ou économiques de la science. Toutes les discussions sont signeés, sauf les discussions signeés par ‘group’ qui sont un effort collectif.

A translation in Belorussian is available here
A translation in Bulgarian is available here via Ivan Boreev.

Technical details

We use WordPress blogging software and are hosted at Openstack.com. Current site design is by Oliver Mösing.

Google Custom Search results are from a subset of the web that we consider provide quality information on climate science. This includes scientific agencies, mainstream climate centres and universities around the world.

Détails techniques

Nous utilisons le logiciel de blogWordPress et sommes hébergés chez Openstack.com. Le design du site est signé Oliver Mösing.

Translations

We welcome translation efforts for all our substantive articles. Currently, we host translations of many articles that have been provided from the wider community and additionally we link to external translations. Availability is denoted by the appropriate language flag (note that national flags are merged if the languages are in common). If you would like to get involved translating either to the existing languages, or any new language, please let us know.

Disclaimer

The contributors to this site do so in a personal capacity during their spare time and their posts do not represent the views of the organizations for which they work, nor the agencies which fund them. The contributors are solely responsible for the content of the site and receive no remuneration for their contributions.

RealClimate is not affiliated with any environmental organisations. Although our domain was originally hosted by Science Communications Network (and previously Environmental Media Services), and our initial press release was organised for us by Fenton Communications, none of these organizations were in any way involved in the initial planning for RealClimate, and never had any editorial or other control over content. Neither Fenton nor SCN nor EMS ever paid any contributor to RealClimate.org any money for any purpose at any time. Neither did they pay us expenses, buy our lunch or contract us to do research. This information has always been made clear to anyone who asked.

Renonciation

Les contributeurs de ce site le font à titre personnel pendant leur temps libre, et leurs articles n’engagent pas les organismes pour lesquels ils travaillent, ni les agences de financement de leurs travaux. Les contributeurs sont les seuls responsables du contenu du site et ne recoivent pas de rémunération à ce titre.

RealClimate est associé à aucune organisation environnementale. Nous souhaitons préciser que bien que notre domaine était hébergé par “Science Communication Network” (et avant “Environmental Media Services”), et le communiqué de presse initial a été organisé par “Fenton Communications”, aucune de ces organisations n’était de quelque façon impliquée dans la planification initiale du site RealClimate, et n’a jamais eu quelque contrôle éditorial ou tout autre. Ni Fenton, ni SCN, ni EMS n’ont jamais payé aux auteurs de RealClimate.org quoique ce soit. Ni l’un ni l’autre ne nous ont rémunérés ou financent notre recherche. Tous ces faits toujours ont été clairement communiqué à quiconque le demandait.

Contact

If you would like to contact us, suggest a topic to be covered, contribute a relevant commentary, or be part of this effort on a more permanent basis, please email RealClimate (replace -at- with @). Please do not bother to send us press releases, newsletters or queries about link exchanges.

Contact

Si vous voulez nous contacter pour critiquer, suggérer un sujet ou autre, adressez vous à RealClimate (remplacez -at- par @).

Linking

If you would like to link to us and stream our RSS feed, feel free. You can use any of our banner graphics or icons, or let us know if you want something of a particular size.
,

group

The Surface Temperature Record and the Urban Heat Island

The Bore Hole

Contributors

Caspar Ammann

William M. Connolley

Thibault de Garidel

What does the lag of CO₂ behind temperature in ice cores tell us about global warming? Quelle information sur le réchauffement climatique nous apportent les études qui concluent à un retard du CO₂ sur la température, réalisées à partir des carottes de glace?