Climate Change 2014Synthesis ReportEdited byThe Core Writing TeamRajendra K.PachauriLeo MeyerSynthesis ReportChairmanHead,Technical Support UnitIPCCIPCCIPCCCore Writing TeamRajendra K.Pachauri(Chair),Myles R.Allen (United Kingdom),Vicente R.Barros (Argentina),John Broome(United Kingdom),WolfgangCramer (Germany/France),Renate Christ (Austria/WMO),John A.Church (Australia),Leon Clarke(USA),Qin Dahe (China),PurnamitaDasgupta (India),Navroz K.Dubash (India),Ottmar Edenhofer (Germany),Ismail Elgizouli (Sudan),Christopher B.Field (USA),PiersForster(United Kingdom),Pierre Friedlingstein (United Kingdom/Belgium),Jan Fuglestvedt(Norway),Luis Gomez-Echeverri(Colombia),Stephane Hallegatte(France/World Bank),Gabriele Hegerl (United Kingdom/Germany),Mark Howden (Australia),Kejun Jiang (China),Blanca Jimenez Cisneros (Mexico/UNESCO),Vladimir Kattsov (Russian Federation),Hoesung Lee (Republic of Korea),Katharine J Mach(USA),Jochem Marotzke (Germany),Michael D.Mastrandrea (USA),Leo Meyer (The Netherlands),Jan Minx(Germany),Yacob Mulugetta(Ethiopia),Karen O'Brien (Norway),Michael Oppenheimer (USA),Joy J.Pereira (Malaysia),Ramon Pichs-Madruga (Cuba),Gian-KasperPlattner(Switzerland),Hans-Otto Portner(Germany),Scott B.Power(Australia),Benjamin Preston(USA),N.H.Ravindranath(India),AndyReisinger(New Zealand),Keywan Riahi (Austria),Matilde Rusticucci (Argentina),Robert Scholes (South Africa),Kristin Seyboth (USA),Youba Sokona (Mali),Robert Stavins (USA),Thomas F.Stocker(Switzerland),Petra Tschakert (USA),Detlef van Vuuren (The Netherlands),Jean-Pascal van Ypersele (Belgium)Technical Support Unit for the Synthesis ReportLeo Meyer,Sander Brinkman,Line van Kesteren,Noemie Leprince-Ringuet,Fijke van BoxmeerReferencing this reportIPCC,2014:Climate Change 2014:Synthesis Report.Contribution of Working Groups I,ll and llI to the Fifth Assessment Report of theIntergovernmenta/Panel on Climate Change [Core Writing Team,R.K.Pachauri and L.A.Meyer(eds.)].IPCC,Geneva,Switzerland,151 pp.THE INTERGOVERNMENTAL PANEL ON CLIMATE CHANGEIntergovernmental Panel on Climate Change,2015First published 20151SBN978-92-9169-143-2This publication is identical to the report that was approved (Summary for Policymakers)and adopted(longer report)at the 40th session of theIntergovernmental Panel on Climate Change(IPCC)on 1 November 2014 in Copenhagen,Denmark,but with the inclusion of copy-edits anderrata that have been corrected prior to this publication.These pre-publication errata are available at:http://www.ipcc.ch.The designations employed and the presentation of material on maps do not imply the expression of any opinion whatsoever on the part of theIntergovernmental Panel on Climate Change concerning the legal status of any country,territory,city or area or of its authorities,or concerningthe delimitation of its frontiers or boundaries.The mention of specific companies or products does not imply that they are endorsed or recommended by IPCC in preference to others of a similarnature,which are not mentioned or advertised.The right of publication in print,electronic and any other form and in any language is reserved by the IPCC.Short extracts from this publicationmay be reproduced without authorization provided that complete source is clearly indicated.Editorial correspondence and requests to publish,reproduce or translate articles in part or in whole should be addressed to:IPCCd/o World Meteorological Organization (WMO)7bis,avenue de la PaixTel:+41227308208P0.BoX2300Fax+41227308025CH 1211 Geneva 2,SwitzerlandE-mail:IPCC-Sec@wmo.intwww.ipcc.chCover:Design by Laura Biagioni,IPCC Secretariat,WMOPhotos:I-Folgefonna glacier on the high plateaus of Sorfjorden,Norway (6003'N-620'E).Yann Arthus-Bertrand /Altitude www.yannarthusbertrand.org www.goodplanet.orgll-Planting of mangrove seedlings in Funafala,Funafuti Atoll,Tuvalu.David J.WilsonIll -China,Shanghai,aerial view.Ocean/Corbis