IDEAS home Printed from https://ideas.repec.org/p/hal/journl/halshs-00750704.html
   My bibliography  Save this paper

2°C or Not 2°C?

Author

Listed:
  • Céline Guivarch

    () (CIRED - Centre International de Recherche sur l'Environnement et le Développement - CIRAD - Centre de Coopération Internationale en Recherche Agronomique pour le Développement - EHESS - École des hautes études en sciences sociales - AgroParisTech - ENPC - École des Ponts ParisTech - CNRS - Centre National de la Recherche Scientifique)

  • Stéphane Hallegatte

    (CIRED - Centre International de Recherche sur l'Environnement et le Développement - CIRAD - Centre de Coopération Internationale en Recherche Agronomique pour le Développement - EHESS - École des hautes études en sciences sociales - AgroParisTech - ENPC - École des Ponts ParisTech - CNRS - Centre National de la Recherche Scientifique, CNRM-GAME - Groupe d'étude de l'atmosphère météorologique - INSU - CNRS - Institut national des sciences de l'Univers - Météo France - CNRS - Centre National de la Recherche Scientifique)

Abstract

Political attention has increasingly focused on limiting warming to 2°C. However, there is no consensus on both questions "Is the 2°C target achievable?" and "What should be done with this target that becomes increasingly difficult to achieve?". This paper aims at disentangling the points of deep uncertainty underlying this absence on consensus. It first gives simple visualizations of the challenge posed by the 2°C target and shows how key assumptions (on the points of deep uncertainty) influence the answer to the target achievability question. It then proposes an "uncertainties and decisions tree", linking different beliefs on climate change, the achievability of different policies, and current international policy dynamics to various options to move forward on climate change.

Suggested Citation

  • Céline Guivarch & Stéphane Hallegatte, 2013. "2°C or Not 2°C?," Post-Print halshs-00750704, HAL.
  • Handle: RePEc:hal:journl:halshs-00750704 DOI: 10.1016/j.gloenvcha.2012.10.006 Note: View the original document on HAL open archive server: https://halshs.archives-ouvertes.fr/halshs-00750704
    as

    Download full text from publisher

    File URL: https://halshs.archives-ouvertes.fr/halshs-00750704/document
    Download Restriction: no

    Other versions of this item:

    References listed on IDEAS

    as
    1. Jean Charles Hourcade & Philippe Ambrosi & Stéphane Hallegatte & Franck Lecocq & Patrice Dumas & Minh Ha-Duong, 2003. "Optimal control models and elicitation of attitudes towards climate damages," Post-Print halshs-00000966, HAL.
    2. Detlef Vuuren & Elke Stehfest & Michel Elzen & Tom Kram & Jasper Vliet & Sebastiaan Deetman & Morna Isaac & Kees Klein Goldewijk & Andries Hof & Angelica Mendoza Beltran & Rineke Oostenrijk & Bas Ruij, 2011. "RCP2.6: exploring the possibility to keep global mean temperature increase below 2°C," Climatic Change, Springer, vol. 109(1), pages 95-116, November.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. repec:eee:tefoso:v:125:y:2017:i:c:p:258-274 is not listed on IDEAS
    2. Hallegatte, Stephane & Fay, Marianne & Vogt-Schilb, Adrien, 2013. "Green industrial policies : when and how," Policy Research Working Paper Series 6677, The World Bank.

    More about this item

    Keywords

    feasibility of 2°C target; climate change negotiations; deep uncertainty;

    NEP fields

    This paper has been announced in the following NEP Reports:

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:hal:journl:halshs-00750704. See general information about how to correct material in RePEc.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (CCSD). General contact details of provider: https://hal.archives-ouvertes.fr/ .

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service hosted by the Research Division of the Federal Reserve Bank of St. Louis . RePEc uses bibliographic data supplied by the respective publishers.